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(11) | EP 1 303 800 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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MAGNETIC CONTROLLED CURRENT OR VOLTAGE REGULATOR AND TRANSFORMER MAGNETGESTEUERTER STROM- ODER SPANNUNGSREGLER UND TRANSFORMATOR TRANSFORMATEUR ET REGULATEUR DE TENSION OU DE COURANT A COMMANDE MAGNETIQUE |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The present invention relates to a magnetically influenced current or voltage regulator and a magnetically influenced converter for controlled connection and disconnection together with distribution of electrical energy.
[0002] United States Patent Publication US 4210859 discloses an inductive device comprising a magnetic core and windings for producing two or three substantially orthogonal magnetic fields at all points within the core. The device may be utilised as an inductor or transformer in a variety of applications.
[0003] United States Patent Publication US 2333015 discloses a variable reactance device of the type having a magnetic core wound with one or more coils connected in series with a load or translating device in an alternating current circuit and an auxiliary, separately energised, exciting coil for controlling the magnetic density in the core.
[0004] United States Patent Publication US 2716736 discloses a toroidal inductance unit, wherein the inductive reactance may be variable without altering the number of turns, with a novel core construction.
[0005] The invention, which is a continuation of the known transductor technology, is particularly suitable as a voltage connector, current regulator or voltage converter in several areas of the field of power electronics. The feature which particularly characterises the invention is that the transformative or inductive connection between the control winding and the main winding is approximately 0 and that the inductance in the main winding can be regulated through the current in the control winding, and furthermore that the magnetic connection between a primary winding and a secondary winding in a transformer configuration can be regulated through the current in the control winding.
[0006] In the field of rectification, for example, the present invention can be employed in connection with regulation of the high-voltage input in large rectifiers, where the advantage will be full exploitation of a diode rectifier over the entire voltage range. For asynchronous motors, the use of the invention may be envisaged in connection with the soft start of high-voltage motors. The invention is also suitable for use in the field of power distribution in connection with voltage regulation of power lines, and may be used for continuously controlled compensation of reactive power in the network.
[0007] Even though it should not be considered limiting for the use of the device, it may, e.g., form part of a frequency converter for converting input frequency to randomly selected output frequency, preferably intended for operation of an asynchronous motor, where the frequency converter's input side has a three-phase supply which by means of its phase conductors feeds the input to at least one transformer intended for each of the converter's three-phase outputs, and where the outputs of such a transformer are connected via respective, selectively controllable voltage connectors, or via additional transformer-coupled voltage connectors, in order to form one of the said three-phase outputs.
[0008] A second application of the device is as a direct converter of DC voltage to AC voltage whereby the AC voltage's frequency is continuously adjustable.
[0009] The use of this type of frequency converter in a subsea context, especially at great depths, will be where the use is required of high-capacity pumps with variable speeds. Pumping in a subsea system will typically be performed from the underwater site to a location above water (boosting) and with water injection from the underwater site down into the reservoir.
[0010] Variable speed engine controls are normally based on two principles; a) direct electronic frequency-regulated converters, and b) AC-DC-AC converters with pulse-width modulation, and with extended use of semiconductors such as thyristors and IGBT's. The latter represents the technology widely used in industrial applications and for use on board locomotives, etc.
[0011] Speed control has recently been introduced for motors in underwater environments. The main challenge has been the packing and operation of such systems. In this context, operation refers to service, maintenance, etc. Complex electronic systems generally have to operate in controlled environments with regard to temperature and pressure. Marine-based versions of such systems have to be encapsulated in containers filled with nitrogen maintaining a pressure of 1 atm. On account of heat generation as a result of heat loss in the electronics, a substantial amount of heat may be generated, thus resulting in the need for forced air cooling. This is usually solved by the use of fans. The fans introduce a component which dramatically reduces the working life of the system and represents a highly unsuitable solution.
[0012] The sensitivity of the electronics and the electronic power semiconductors is high and requires protective circuits. This complicates the system and forces up the costs.
[0013] At great depths (over 300 metres) a protective container for such a system will be extremely heavy, representing a fairly significant proportion of the total weight of the system. In addition, maintenance of a system more often than not will require the entire frequency converter to be raised, since even simpler maintenance is difficult to perform with a remotely operated vehicle (ROV).
[0014] Thus it has been a co-ordinate object of the device according to the present invention to offer the possibility of providing a frequency converter which is suitable for underwater pumping operations, particularly with the focus on operational reliability, stability and minimum maintenance requirements. The operational requirement will be approximately 25 years at 3000 m depth.
[0015] The standard frequency converters which are based on semiconductor technology convert alternating current (AC) power with a given frequency to alternating current power in the other selected frequency without any intermediate DC connection. The conversion is carried out by forming a connection between given input and output terminals during controlled time intervals. An output voltage wave with an output frequency F0 is generated by sequentially connecting selected segments of the voltage waves on the AC input source with the input frequency F1 to the terminals. Such frequency converters exist in the form of the standard symmetrical cycloconverter circuits for supplying power from a three-phase network to a three-phase motor. The standard cycloconverter module consists of a dual converter in each motor phase. Thus the normal method is to employ three identical, essentially independent dual converters which provide a three-phase output.
[0016] Amongst other known types of frequency converters is a symmetrical 12-pulse centre cycloconverter consisting of three identical 4-quadrant 12-pulse centre converters, with one for each output phase. All three converters share common secondary windings on the input transformer. The neutral conductor can be omitted for a balanced 3-phase loaded Y-coupled motor.
[0017] Another known frequency converter based on semiconductor technology is the so-called symmetrical 12-pulse bridge circuit which has three identical 4-quadrant 12-pulse bridge converters with one for each output phase. The input terminals on each of the six individual 6-pulse converters are fed from separate secondary windings on the input transformer. It should be noted that it is not permitted to use the same secondary winding for more than one converter. This is due to the fact that each 12-pulse converter in itself requires two completely insulated transformer secondary windings.
[0018] It has therefore been a secondary, but nevertheless essential object of the invention to avoid primarily semiconductor components in the frequency converter which has to be located at great depths and for this purpose the use has therefore been proposed according to the invention of the new magnetic converter technology based on an entirely untraditional concept.
[0019] Thus, an embodiment not according to the invention comprises a magnetically influenced current or voltage regulator, which may be characterized in that it comprises: a body which is composed of a magnetisable material and provides a closed, magnetic circuit, at least one first electrical conductor wound round the body along at least a part of the closed circuit for at least one turn which forms a first main winding, at least one second electrical conductor wound around the body along at least a part of the closed circuit to at least one turn which forms a second main winding or control winding, where the winding axis for the turn or turns in the main winding is at right angles to the winding axis for the turn or turns in the control winding. The object of this is to provide orthogonal magnetic fields in the body and thereby control the behaviour of the magnetisable material relative to the field in the main winding by means of the field in the control winding. In a preferred version of this embodiment, the axis for the turn(s) in the main winding is parallel to or coincident with the body's longitudinal direction, while the tum(s) in the control winding extend substantially along the magnetisable body and the axis for the control winding is therefore at right angles to the body's longitudinal direction. A second possible variant of this embodiment consists in the axis for the tum(s) in the control winding being parallel to or coincident with the body's longitudinal direction, while the turn(s) in the main winding extend substantially along the magnetisable body and the axis for the main winding is therefore at right angles to the body's longitudinal direction.
[0020] The above embodiment can be adapted for use as a transformer by being equipped with a third electrical conductor wound around the body along at least a part of the closed circuit for at least one turn, forming a third main winding, the winding axis for the turn or turns in the third main winding coinciding with or being parallel to the winding axis for the turn or turns in the first main winding, thus providing a transformer effect between the first and the third main windings when at least one of them is excited. A second possibility for adapting this embodiment for use as a transformer is to equip it with a third electrical conductor wound around the body along at least a part of the closed circuit for at least one turn, forming a third main winding, the winding axis for the turn or turns in the third main winding being coincident with or parallel to the winding axis for the turn or turns in the control winding, thus providing a transformer effect between the third main winding and the control winding when at least one of them is excited.
[0021] Another embodiment not according to the invention comprises a magnetically influenced current or voltage regulator, characterized in that it comprises a first body and a second body, each of which is composed of a magnetisable material which provides a closed, magnetic circuit, the said bodies being juxtaposed, at least one first electrical conductor wound along at least a part of the closed circuit for at least one turn which forms a first main winding, at least one second electrical conductor wound around at least a part of the first and/or second body for at least one turn which forms a second main winding or control winding, where the winding axis for the turn or turns in the main winding is at right angles to the winding axis for the turn or turns in the control winding. The object of this is to provide orthogonal magnetic fields in the body and thereby control the behaviour of the magnetisable material relative to the field in the main winding by means of the field in the control winding. The main and control windings may of course be interchanged, thus providing a magnetically influenced current or voltage regulator, characterized in that it comprises at least one first electrical conductor wound round at least a part of the first and/or the second body for at least one turn which forms a first main winding, at least one second electrical conductor wound along at least a part of the closed circuit for at least one turn which forms a second main winding or control winding, where the winding axis for the turn or turns in the main winding is at right angles to the winding axis for the turn or turns in the control winding with the object of providing orthogonal magnetic fields in the body and thereby controlling the behaviour of the magnetisable material relative to the field in the main winding by means of the field in the control winding.
[0022] A preferred variant of the above embodiment comprises first and second magnetic field connectors which together with the bodies form the closed magnetic circuit.
[0023] The above embodiment can also be adapted for use as a transformer by equipping it with a third electrical conductor wound for one turn which forms a third main winding, the winding axis for the turn or turns in the third main winding being coincident with or parallel to the winding axis A2 for the turn or turns in the first main winding or in the control winding, thus providing a transformer effect between the third main winding and the first main winding or the control winding when at least one of this is excited.
[0024] In a preferred version of the above embodiment, the first and the second body are tubular, thus enabling the first conductor or the second conductor to extend through the first and the second body. In this version the magnetic field connectors preferably comprise apertures for the conductors. In a more preferred version, each magnetic field connector comprises a gap to facilitate the insertion of the first or the second conductor. In an even more preferred version, the device is equipped with an insulating film placed between the end surfaces of the tubes and the magnetic field connectors with the object of insulating the connecting surfaces from each other in order to prevent induced eddy currents from being produced in the connecting surfaces by short-circuitirig of the layer of film. For a core made of ferrite or compressed powder, an insulation film will not be necessary. Furthermore, it is particularly advantageous that each tube in the above embodiment not according to the invention comprises two or more core parts and that in addition an insulating layer is provided between the core parts. The tubes in the above embodiment not according to the invention, moreover, may have circular, square, rectangular, triangular or hexagonal cross sections.
[0025] An embodiment of the invention relates to a magnetically influenced current or voltage regulator, characterized in that it comprises a first, external tubular body and a second, internal tubular body, each of which is composed of a magnetisable material and provides a closed, magnetic circuit, the said bodies being concentric relative to each other and thus having a common axis, at least one first electrical conductor wound round the tubular bodies for at least one turn which forms a first main winding, at least one second electrical conductor provided in the space between the bodies and wound around the bodies' common axis for at least one turn which forms a second main winding or control winding, where the winding axis for the turn or turns in the main winding is at right angles to the winding axis for the turn or turns in the control winding. The object again is to provide orthogonal magnetic fields in the bodies and thereby control the behaviour of the magnetisable material relative to the field in the main winding by means of the field in the control winding. The main winding and the control winding will also be interchangeable in this embodiment of the invention, thus providing a magnetically influenced current or voltage regulator, where at least one first electrical conductor is provided in the space between the bodies and wound round the bodies' common axis for at least one turn which forms a first main winding, at least one second electrical conductor is wound around the tubular bodies for at least one turn which forms a second main winding or control winding, and the winding axis for the turn or turns in the main winding is at right angles to the winding axis for the turn or turns in the control winding.
[0026] A preferred variant of the above embodiment of the invention comprises first and second magnetic field connectors which together with the bodies form the closed magnetic circuit.
[0027] The above embodiment of the invention can also be adapted for use as a transformer by equipping the device with a third electrical conductor wound for at least one turn which forms a third main winding. In this case too the winding axis for the turn or turns in the third main winding may either be coincident with or parallel to the winding axis for the turn or turns in the first main winding, thus providing a transformer effect between the first and the third main windings when at least one of this is excited, or the winding axis for the turn or turns in the third main winding may be coincident with or parallel to the winding axis for the turn or turns in the control winding, thus providing a transformer effect between the third main winding and the control winding when at least one of this is excited.
[0028] Another embodiment of the invention relates to a magnetically influenced current or voltage regulator, comprising a first external tubular body and a second internal tubular body each of which is composed of a magnetisable material and provides a magnetic circuit, the said bodies being concentric relative to each other and thus having a common axis, at least one first electrical conductor wound round the tubular bodies for at least one turn forming a first main winding and at least one second electrical conductor provided in a gap between the bodies and wound around the body's common axis for at least one turn forming a second main winding or control winding, or at least one first electrical conductor provided in a gap between the bodies and wound around the body's common axis for at least one turn forming a first main winding and at least one second electrical conductor wound round the tubular bodies for at least one turn forming a second main winding or control winding, where the winding axis for the turn or turns in the main winding is at right angles to the winding axis for the turn or turns in the control winding with the object of providing orthogonal magnetic fields respectively in the bodies and thereby controlling the behaviour of the magnetisable material relative to the field in the main winding by means of the field in the control winding, characterised in that the first and second bodies are made of a wound foil of magnetic material, and that the regulator provides a closed magnetic circuit for the orthogonal magnetic fields by means of said first and second bodies, a first magnetic field connector and a second magnetic field connector, said first and second magnetic field connectors magnetically interconnecting the respective end surfaces of the first and second bodies.
[0029] The object again is to provide orthogonal magnetic fields in the body and thereby control the behaviour of the magnetisable material relative to the field in the main winding by means of the field in the control winding. In the same way as in the second-mentioned embodiment not according to the invention, the main winding and the control winding may be interchangeable, thus providing a device where at least one first electrical conductor is provided in the space between the first and the second bodies and wound round the bodies' common axis for at least one turn which forms a second main winding or control winding, at least one second electrical conductor is wound around the tubular bodies for at least one turn which forms a second main winding or control winding.
[0030] The invention comprises first and second magnetic field connectors which together with the bodies form the closed magnetic circuit.
[0031] This embodiment of the device can be adapted for use as a transformer by equipping it with a third electrical conductor wound around the external core for one turn which forms a third main winding. In this case too there will be two alternatives: one where the winding axis for the turn or turns in the third main winding is coincident with or parallel to the winding axis for the turn or turns in the first main winding, thus providing a transformer effect between the first and the third main windings when at least one of this is excited, and one where the winding axis for the turn or turns in the third main winding is coincident with or parallel to the winding axis for the turn or turns in the control winding, thus providing a transformer effect between the third main winding and the control winding when at least one of this is excited.
[0032] It is, of course, possible to implement the above embodiment of the invention in such a manner that the two tubular bodies which form the internal core are mounted on the outside of the tubular body forming the external core, thus providing an internal core with one tubular body and an external core with two tubular bodies.
[0033] In a preferred variant of this embodiment of the invention, the device is characterized in that the external core consists of several annular parts, and that the first and/or the third main winding forms individual windings around each annular part. A second possibility is that the control winding and/or the third main winding form individual windings around each annular part.
[0035] Devices according to the invention will have many interesting applications, of which we shall mention only a few. These are: a) as a component in a frequency converter for converting input frequency to randomly selected output frequency preferably intended for operation of an asynchronous motor, in a cycloconverter connection, b) as a connector in a frequency converter for converting input frequency to randomly selected output frequency and intended for operation of an asynchronous motor, for addition of parts of the phase voltage generated from a 6 or 12-pulse transformer to each motor phase, c) as a DC to AC converter which converts DC voltage/current to an AC voltage/current of randomly selected output frequency, d) as in c) but where three such variable inductance voltage converters are interconnected in order to generate a three-phase voltage with randomly selected output frequency which is connected to the said asynchronous machine, e) for converting AC voltage to DC voltage within the processing industry, where the device is used as a reluctance-controlled variable transformer where the output voltage is proportional to the reluctance change in a core which is magnetically connected in parallel or in series to an external or internal core with a separate secondary winding, and where three or more such reluctance-controlled transformers are connected to the known three-phase rectifier connections for 6 or 12-pulse rectifier connections for diode output stage, 1) for use in a rectifier for converting AC voltage to DC voltage for use in the processing industry, where the device forms voltage connectors which are used as variable inductances in series with primary windings on known transformer connectors, and where three or more such transformers are connected to three-phase rectifier connectors for 6 or 12-pulse rectifier connectors for diode output stage, g) for AC/DC or DC/AC converters for use in the field of switched power supply, for reduction of the size of the magnetic voltage converter, where the device forms a reluctance-controlled variable transformer where the output voltage is proportional to the reluctance change in a core which is magnetically connected in parallel or in series to an external or internal core with a separate secondary winding, preferably by filters in which inductance is included being formed with a variable inductance, h) as a component in a controllable voltage compensator in the high voltage distribution network, where the device forms a linear variable inductance, i) as a component in a controllable reactive power compensator (VAR compensator), where the device creates linear variable inductance in connection with known filter circuits in which at least one condenser also forms an element, the device in the form of a reluctance-controlled transformer being employed as an element in a compensator connection where capacitance or inductance are automatically connected and adjusted to the extent required to compensate for the reactive power, j) in a system for reluctance-controlled direct conversion of an AC voltage to a DC voltage, k) in a system for reluctance-controlled direct conversion of a DC voltage to an AC voltage.
[0036] The voltage connector is without movable parts for absorbing electrical voltage between a generator and a load. The function of the connector is to be able to control the voltage between the generator and the load from 0-100% by means of a small control current. A second function will be as a pure voltage switch or as a current regulator. A further function could be forming and converting of a voltage curve.
[0037] The new technology according to the invention will be able to be used for upgrading existing diode rectifiers where there is a need for regulation. In connection with 12-pulse or 24-pulse rectifier systems, it will be possible to balance voltages in the system in a simple manner while having controllable diode rectification from 0-100%.
[0038] The current or voltage regulator according to the invention is implemented in the form of a magnetic connector substantially without movable parts, and it will be able to be used for connecting and thereby transferring electrical energy between a generator and a load. The function of the magnetic connector is to be capable of closing and opening an electrical circuit.
[0039] The connector will therefore act in a different way to a transductor where the transformer principle is employed in order to saturate the core. The present connector controls the working voltage by bringing the main core with a main winding in and out of saturation by means of a control winding. The connector has no noticeable transformative or inductive connection between the control winding and the main winding (in contrast to a transductor), i.e. no noticeable common flux is produced for the control winding and the main winding.
[0040] This new magnetically controlled connector technology will be capable of replacing semiconductors such as GTO's in high-powered applications, and MosFet or IGBT in other applications, except that it will be limited to applications which can withstand stray currents which are produced by the main winding's magnetisation no-load current. As mentioned in the introduction, the new converter will be particularly suitable for realising a frequency converter which converts alternating current power with a given frequency to alternating current power which has a different selected output frequency. No intermediate DC connection will be necessary in this case.
[0041] As mentioned at the beginning, devices according to the invention are capable of being employed in connection with frequency converters, such as those based on the cycloconverter principle, but also frequency converters based on 12-pulse bridge converters, or by direct conversion of DC voltage to AC voltage of variable frequency.
[0042] The principle of devices according to the invention, in which a variable reluctance is employed in a magnetisable body or main core, is based on the fact that magnetisation current in a main winding, which is wound round a main core, is limited by the flux resistance according to Faraday's Law. The flux which has to be established in order to generate counter-induced voltage is dependent on the flux resistance in the magnetic core. The magnitude of the magnetisation current is determined by the amount of flux which has to be established in order to balance applied voltage.
[0043] The flux resistance in a coil where the core is air is of the order of 1.000 - 900.000 times greater than for a winding which is wound round a core of ferromagnetic material. In the case of low flux resistance (iron core) little current is required to establish a flux which is necessary to generate a bucking voltage to the applied voltage, according to Faraday's Law. In the case of high flux resistance (air core) a large current is required in order to establish the flux necessary to generate the same induced bucking voltage.
[0044] By controlling the flux resistance, the magnetisation current or the load current in the circuit can be controlled. In order to control the flux resistance, according to the invention a saturation of the main core is employed by means of a control flux which is orthogonal relative to the flux generated by the main winding. As already mentioned, the above-mentioned principle forms the basis of the invention, which relates to a magnetically influenced current or voltage regulator (connector) and a magnetically influenced converter device.
[0045] It will be appreciated that both the connector and the converter can be produced by means of suitable production equipment for toroidal cores. From the technical point of view, the converter can be produced by magnetic material such as electroplating being wound up in suitably designed cylindrical cores or used for higher frequencies with compressed powder or ferrite. It is, of course, also advantageous to produce ferrite cores or compressed powder cores according to the dictates of the application.
[0046] The invention will now be described in greater detail with reference to the attached drawings, in which:
Figs. 1 and 2 illustrate the basic principle of an embodiment not according the invention.
Fig. 3 is a schematic illustration of a device that is not according to the invention.
Fig. 4 illustrates the areas of the different magnetic fluxes which form part of the device that is not according to the invention.
Fig. 5 illustrates a first equivalent circuit for the device that is not according to the invention.
Fig. 6 is a simplified block diagram of the device that is not according to the invention.
Fig. 7 is a diagram of flux versus current.
Figs. 8 and 9 illustrate magnetisation curves and domains for the magnetic material in the device that is not according to the invention.
Fig. 10 illustrates flux densities for the main and control windings.
Fig. 11 illustrates a second embodiment not according to the invention.
Fig. 12 illustrates the second embodiment that is not according to the invention.
Figs. 13 and 14 illustrate the second embodiment that is not according to the invention, in section.
Figs. 15-18 illustrate different variants, that are not according to the invention, of the magnetic field connectors in the said second embodiment that is not according to the invention.
Figs. 19-32 illustrate different variants, that are not according to the invention, of the tubular bodies in the second embodiment that is not according to the invention.
Figs. 33-38 illustrate different aspects of the magnetic field connectors for use in the second embodiment that is not according to the invention.
Fig. 39 illustrates an assembled device according to the second embodiment that is not according to the invention.
Figs. 40 and 41 are a section and a view of an embodiment according to the invention.
Figs. 42, 43 and 44 illustrate special variants of magnetic field connectors for use in the embodiment according to the invention.
Fig. 45 illustrates the embodiment according to the invention adapted for use as a transformer.
Figs. 46 and 47 are a section and a view of another embodiment of the invention for use as a reluctance-controlled, flux-connected transformer.
Figs. 48 and 49 illustrate a device not according to the invention adapted to suit a powder-based magnetic material, and thereby without magnetic field connectors.
Figs. 50 and 51 are sections along lines VI-VI and V-V in figure 48.
Figs. 52 and 53 illustrate a core adapted to suit a powder-based magnetic material, and thereby without magnetic field connectors, not according to the invention.
Fig. 54 is an "X-ray picture" of a variant of the other embodiment of the invention.
Fig. 55 illustrates a second variant of the device according to the second embodiment that is not according to the invention together with the principle behind a possibility for transformer connection.
Fig. 56 illustrates a proposal for an electro-technical schematic symbol for the voltage connector that is not according to the invention.
Fig. 57 illustrates a proposal for a block schematic symbol for the voltage connector that is not according to the invention.
Fig. 58 illustrates a magnetic circuit where the control winding and control flux are not included.
Figs. 59 and 60 illustrate proposals for electro-technical schematic symbols for the voltage converter that is not according to the invention.
Fig. 61 illustrates the use of the invention in an alternating current circuit.
Fig. 62 illustrates the use of the invention in a three-phase system.
Fig. 63 illustrates a use as a variable choke in DC-DC converters.
Fig. 64 illustrates a use as a variable choke in a filter together with condensers.
Fig. 65 illustrates a simplified reluctance model for the device according to the invention and a simplified electrical equivalent diagram for the connector according to the invention.
Fig. 66 illustrates the connection for a magnetic switch.
Fig. 67 illustrates examples of a three-phase use of the invention.
Fig. 68 illustrates the device employed as a switch.
Fig. 69 illustrates a circuit comprising 6 devices according to the invention.
Fig. 70 illustrates the use of the device according to the invention as a DC-AC converter.
Fig. 71 illustrates a use of the device according to the invention as an AC-DC converter.
[0047] A device not according to the invention will now be explained in principle in connection with Figs. 1a and 1b.
[0048] In the entire description, the arrows associated with magnetic field and flux will substantially indicate the directions thereof within the magnetic material. The arrows are drawn on the outside for the sake of clarity.
[0049] Figure 1a illustrates a device comprising a body 1 of a magnetisable material which forms a closed magnetic circuit. This magnetisable body or core 1 may be annular or of another suitable shape. Round the body 1 is wound a first main winding 2, and the direction of the magnetic field H1 (corresponding to the direction of the flux density B1) which will be created when the main winding 2 is excited will follow the magnetic circuit. The main winding 2 corresponds to a winding in an ordinary transformer. In a variant, the device includes a second main winding 3 which in the same way as the main winding 2 is wound round the magnetisable body 1 and which will thereby provide a magnetic field which extends substantially along the body 1 (i.e. parallel to H1, B1). The device finally includes a third main winding 4 which, in a preferred variant, extends internally along the magnetic body 1. The magnetic field H2 (and thus the magnetic flux density B2) which is created when the third main winding 4 is excited will have a direction which is at right angles to the direction of the fields in the first and the second main winding (direction of H1, B1). The device may also include a fourth main winding 5 which is wound round a leg of the body 1. When the fourth main winding 5 is excited, it will produce a magnetic field with a direction which is at right angles both to the field in the first (H1), the second and the third main winding (H2) (figure 3). This will naturally require the use of a closed magnetic circuit for the field which is created by the fourth main winding. This circuit is not illustrated in the figure, since the figure is only intended to illustrate the relative positions of the windings.
[0050] In the topologies which are considered to be preferred in the present description, however, it is the case that the turns in the main winding follow the field direction from the control field and the turns in the control winding follow the field direction to the main field.
[0051] Figures 1b-1g illustrate the definition of the axes and the direction of the different windings and the magnetic body. With regard to the windings, we shall call the axis the perpendicular to the surface which is restricted by each turn. The main winding 2 will have an axis A2, the main winding 3 an axis A3 and the control winding 4 an axis A4.
[0052] With regard to the magnetisable body, the longitudinal direction will vary with respect to the shape. If the body is elongated, the longitudinal direction A1 will correspond to the body's longitudinal axis. If the magnetic body is square as illustrated in figure 1a, a longitudinal direction A1 can be defined for each leg of the square. Where the body is tubular, the longitudinal direction A1 will be the tube's axis, and for an annular body the longitudinal direction A1 will follow the ring's circumference.
[0053] The device is based on the possibility of altering the characteristics of the magnetisable body 1 in relation to a first magnetic field by altering a second magnetic field which is at right angles to the first. Thus, for example, the field H1 can be defined as the working field and control the body's 1 characteristics (and thereby the behaviour of the working field H1) by means of the field H2 (hereinafter called control field H2). This will now be explained in more detail.
[0054] The magnetisation current in an electrical conductor which is enclosed by a ferromagnetic material is limited by the reluctance according to Faraday's Law. The flux which has to be established in order to generate counterinduced voltage depends on the reluctance in the magnetic material enclosing the conductor.
[0055] The extent of the magnetisation current is determined by the amount of flux which has to be established in order to balance applied voltage. In general the following steady-state equation applies for sinusoidal voltage:
1) Flux:
E = applied voltage
ω = angular frequency
N = number of turns for winding
where the flux Φ through the magnetic material is determined by the voltage E. The
current required in order to establish necessary flux is determined by:
2) Current
3) Reluctance (flux resistance)
lj = length of flux path
µr = relative permeability
µo = permeability in vacuum
Aj = cross-sectional area of the flux path
[0056] Where there is low reluctance (iron enclosure), according to expression 2) above, little current will be required in order to establish the necessary flux, and supplied voltage will overlay the connector. In the case of high reluctance (air) on the other hand, a large current will be required in order to establish the necessary flux. In this case the current will then be limited by the voltage over the load and the voltage induced in the connector. The difference between reluctance in air and reluctance in magnetic material may be of the order of 1.000 - 900.000.
[0057] The magnetic induction or flux density in a magnetic material is determined by the material's relative permeability and the magnetic field intensity. The magnetic field intensity is generated by the current in a winding arranged round or through the material.
[0058] For the systems which have to be evaluated the following applies:
The field intensity
= field intensity
s = the integration path
I = current in winding
N = number of windings
Flux density or induction:
= magnetic field intensity
[0059] The ratio between magnetic induction and field intensity is non-linear, with the result that when the field intensity increases above a certain limit, the flux density will not increase and on account of a saturation phenomenon which is due to the fact that the magnetic domains in a ferromagnetic material are in a state of saturation. Thus it is desirable to provide a control field H2 which is perpendicular to a working field H1 in the magnetic material in order to control the saturation in the magnetisable material, while avoiding magnetic connection between the two fields and thereby avoiding transformative or inductive connection. Transformative connection means a connection where two windings "share" a field, with the result that a change in the field from one winding will lead to a change in the field in the other winding.
[0060] One will avoid increasing H to saturation as by a transformative connection where the fluxes will have a common path and will be added together. If the fluxes are orthogonal they will not be added together. For example, by providing the magnetic material as a tube where the main winding or the winding which carries the working current is located inside the tube and is wound in the tube's longitudinal direction, and where the control winding or the winding which carries the control current is wound round the circumference of the tube, the desired effect is achieved. Depending on the tube dimensions, a small area for the control flux and a large area for the working flux are thereby also achieved.
[0061] In the said embodiment not according to the invention, the working flux will travel in the direction along the tube's circumference and have a closed magnetic circuit. The control flux on the other hand will travel in the tube's longitudinal direction and will have to be connected in a closed magnetic circuit, either by two tubes being placed in parallel and a magnetic material connecting the control flux between the two tubes, or by a first tube being placed around a second tube, with the result that the control winding is located between the two tubes, and the end surfaces of the tubes are magnetically interconnected, thereby obtaining a closed path for the control flux. These solutions will be described in greater detail later.
[0062] The parts which provide magnetic connection between the tubes or the core parts will hereinafter be called magnetic field connectors or magnetic field couplings.
[0064] The flux density B is composed of the vector sum of B1 and B2 (fig. 4d). B1 is generated by the current 11 in the first main winding 2, and B1 has a direction tangentially to the conductors in the main winding 2. The main winding 2 has N1 turns and is wound round the magnetisable body 1. B2 is generated by the current 12 in the control winding 4 with N2 number of turns and where the control winding 4 is wound round the body 1. B2 will have a direction tangentially to the conductors in the control winding 4.
[0065] Since the windings 2 and 4 are placed at 90° to each other, B1 and B2 will be orthogonally located. In the magnetisable body 1, B1 will be oriented transversally and B2 longitudinally. In this connection we refer particularly to what is illustrated in figs. 1-4.
[0066] It is considered an advantage that the relative permeability is higher in the working field's (H1) direction than in the control field's (H2) direction, i.e. the magnetic material in the magnetisable body 1 is anisotropic.
[0067] The vector sum of the fields H1 and H2 will determine the total field in the body 1, and thus the body's 1 condition with regard to saturation, and will be determining for the magnetisation current and the voltage which is divided between a load connected to the main winding 2 and the connector. Since the sources for B1 and B2 will be located orthogonally to each other, none of the fields will be able to be decomposed into the other. This means that B1 cannot be a function of B2 and vice versa. However, B, which is the vector sum of B1 and B2 will be influenced by the extent of each of them.
[0068] B2 is the vector which is generated by the control current. The cross-sectional surface A2 for the B2 vector will be the transversal surface of the magnetic body 1, cf. figure 4c. This may be a small surface limited by the thickness of the magnetisable body 1, given by the surface sector between the internal and external diameters of the body 1, in the case of an annular body. The cross-sectional surface A1 (see figures 4a, b) for the B1 field on the other hand is given by the length of the magnetic core and the rating of applied voltage. This surface will be able to be 5-10 times larger than the surface of the control flux density B2, without this being considered limiting for the invention.
[0069] When B2 is at saturation level, a change in B1 will not result in a change in B. This makes it possible to control which level on B1 gives saturation of the material, and thereby control the reluctance for B.
[0070] The inductance for the control winding 4 (with N2 turns) will be able to be rated at a small value suitable for pulsed control of the regulator, i.e. enabling a rapid reaction (of the order of milliseconds) to be provided.
N2 = Number of turns for control winding
A2 = Area of control flux density B2
l2 = Length of flux path for control flux
[0072] For simple calculations of magnetic fields in electrical power technology, Maxwell's equations are used in integral form.
[0074] The displacement current can thus be neglected compared with the current density.
Maxwell's equation
is simplified to
[0075] The integral form is found in Toke's theorem:
presents a solution for the system in fig. 4, where the main winding 2 establishes the H1 field. The calculations are performed here with concentrated windings in order to be able to focus on the principle and not an exact calculation.
[0076] The integration path coincides with the field direction and an average field length 11 is chosen in the magnetisable body 1. The solution of the integral equation then becomes:
[0079] The magnetisation of the material under the influence of the H field which is generated from the source windings 2 and 4 is expressed by the flux density B. For the main winding 2:
[0081] The permeability in the transversal direction is of the order of 1 to 2 decades less than for the longitudinal direction. The permeability for vacuum is:
[0082] The capacity to conduct magnetic fields in iron is given by µr, and the magnitude of µ is from 1000 to 100.000 for iron and for the new Metglas materials up to 900.000.
[0086] Here we recognise the expression for the flux resistance Rm or the reluctance as given under 3):
[0088] The operation of the device is based on the physical fact that the differential of the magnetic field intensity which has its source in the current in a conductor is expressed by curl to the H field. Curl to H says something about the differential or the field change of the H field across the field direction of H. In our case we have calculated the field on the basis that the surface perpendicular of the differential field loop has the same direction as the current. This means that the fields from the current-carrying conductors forming the windings which are perpendicular to each other are also orthogonal. The fact that the fields are perpendicular to each other is important in relation to the orientation of the domains in the material.
[0089] Before examining this more closely, let us introduce self-inductance which will play a major role in the application of the new magnetically controlled power components.
[0090] According to Maxwell's equations, a time-varying magnetic field will induce a time-varying electrical field, expressed by
[0091] The left side of the integral is an expression of the potential equation in integral form. The source of the field variation may be the voltage from a generator and we can express Faraday's Law when the winding has N turns and all flux passes through all the turns, see fig. 5:
[0092] λ (Wb) gives an expression of the number of flux turns and is the sum of the flux through each turn in the winding. If one envisages the generator G in fig. 5 being disconnected after the field is established, the source of the field variation will be the current in the circuit and from circuit technology we have, see fig. 5a:
[0097] This is an expression of self-inductance for the winding N (or in our case the main winding 2). The self-inductance is equal to the ratio between the flux turns established by the current in the winding (the coil) and the current in the winding (the coil).
[0098] The self-inductance in the winding is approximately linear as long as the magnetisable body or the core are not in saturation. However, we shall change the self-inductance through changes in the permeability in the material of the magnetisable body by changing the domain magnetisation in the transversal direction by the control field (i.e. by the field H2 which is established by the control winding 4).
[0100] The alternating current resistance or the reactance in an electrical circuit with self-inductance is given by
[0101] By magnetising the domains in the magnetisable body in the transversal direction, the reluctance of the longitudinal direction will be changed. We shall not go into details here in the description of what happens to the domains during different field influences. Here we have considered ordinary commercial electroplate with a silicon content of approximately 3%, and in this description we shall not offer an explanation of the phenomenon in relation to the Metglas materials, but the magnetic materials with amorphous structure will be able to play an important role in some applications.
[0102] In a transformer we employ closed cores with high permeability where energy is stored in magnetic leakage fields and a small amount in the core, but the stored energy does not form a direct part in the transformation of energy, with the result that no energy conversion takes place in the sense of what occurs in an electromechanical system where electrical energy is converted to mechanical energy, but energy is transformed via magnetic flux through the transformer. In an inductance coil or choke with an air gap, the reluctance in the air gap is dominant compared to the reluctance in the core, with approximately all the energy being stored in the air gap.
[0103] In the device, a "virtual" air gap is generated through saturation phenomena in the domains. In this case the energy storage will take place in a distributed air gap comprising the whole core. We consider the actual magnetic energy storage system to be free for losses, and any losses will thus be represented by external components.
[0104] The energy description which we use will be based on the principle of conservation of energy.
[0105] The first law of thermodynamics applied to the loss-free electromagnetic system above gives, see fig. 6:
where
dWelin = differential electrical energy supply
dWfld = differential change in magnetically stored energy
[0107] Now our inductance is variable through the orthogonal field or the control field H2, and equation 31) inserted in 26) gives:
[0110] For a system with a core where the reluctance can be varied and which only has a main winding, equation 35) inserted in equation 37) will give
[0111] In the device, L will be varied as a function of µr, the relative permeability in the magnetisable body or the core 1, which in turn is a function of I2, the control current in the control winding 4.
[0112] When L is constant, i.e. when 12 is constant, we can disregard the section i x dL since dL is equal to 0, and thus the magnetic field energy will be given by:
[0113] When L is varied by means of I2, the field energy will be altered as a result of the altered value of L, and thereby the current I will also be altered since it is associated with the field value through the flux turns λ. Since i and λ are variable and functions of each other, while being non-linear functions, we shall not go into the solution here since it will involve mathematics which exceed the bounds of the description necessary to understand the device.
[0114] However, we can draw the conclusion that the field energy and the energy distribution will be controllable via µr and influence how energy stored in the field is increased and decreased. When the field energy is decreased, the surplus portion will be returned to the generator. Or if we have an extra winding (e.g. winding 3, figure 1) in the same winding window as the first main winding 2 and with the same winding axis as it has, this will provide a transformative transfer of energy from the first winding 2 to the second main winding 3.
[0115] This is illustrated in fig. 7 where an alteration of λ results in an alteration of the energy in the field Wflt which originally is Wflt(λo, io). A variation is envisaged here which is so small that i is approximately constant during the alteration of λ. In the same way an alteration of i will give an alteration of λ. When we look at our variable inductance, therefore, we can say the following:
[0117] Fig. 8 illustrates the magnetisation curves for the entire material of the magnetisable body 1 and the domain change under the influence of the H1 field from the main winding 2.
[0118] Fig. 9 illustrates the magnetisation curves for the entire material of the magnetisable body 1 and the domain change under the influence of the H2 field in the direction from the control winding 4.
[0119] Figs. 10a and 10b illustrate the flux densities B1 (where the field H1 is established by the working current), and B2 (corresponding to the control current). The ellipse illustrates the saturation limit for the B fields, i.e. when the B field reaches the limit, this will cause the material of the magnetisable body 1 to reach saturation. The form of the ellipse's axes will be given by the field length and the permeability of the two fields B1 (H1) and B2 (H2) in the core material of the magnetisable body 1.
[0120] By having the axes in figure 10 express the MMK distribution or the H field distribution, a picture can be seen of the magnetomotive force from the two currents I1 and I2.
[0121] We now refer back to figures 8 and 9. By means of a partial magnetisation of the domains by the control field B2 (H2), an additional field B1 (H1) from the main winding 2 will be added vectorially to the control field B2 (H2), further magnetising the domains, with the result that the inductance of the main winding 2 will start from the basis given by the state of the domains under the influence of the control field B2 (H2).
[0122] The domain magnetisation, the inductance L and the alternating current resistance XL will thereby be varied linearly as a function of the control field B2.
[0123] We shall now describe the several variants of the device, with reference to the remaining figures.
[0125] Figure 12 illustrates the same embodiment of a magnetically influenced connector not according to the invention, where Fig. 12a illustrates the assembled connector and Fig. 12b illustrates the connector viewed from the end.
[0127] As illustrated in the figures the magnetisable body 1 is composed of inter alia two parallel tubes 6 and 7 made of magnetisable material. An electrically insulated conductor 8 (figs. 12a, 13) is passed continuously in a path through the first tube 6 and the second tube 7 N number of times, where N = 1, ... r, forming the first main winding 2, with the conductor 8 extending in the opposite direction through the two tubes 6 and 7, as is clearly illustrated in fig. 13. Even though the conductor 8 is only shown extending through the first tube 6 and the second tube 7 twice, it should be self-explanatory that it is possible for the conductor 8 to extend through respective tubes either only once or possibly several times (as indicated by the fact that the winding number N can vary from 0 to r), thus creating a magnetic field H1 in the parallel tubes 6 and 7 when the conductor is excited. A combined control and magnetisation winding 4, 4', composed of the conductor 9, is wound round the first tube and the second tube (6 and 7 respectively) in such a manner that the direction of the field H2 (B2) which is created in the said tubes when the winding 4 is excited will be oppositely directed, as indicated by the arrows for the field B2 (H2) in figure 11. The magnetic field connectors 10, 11 are mounted at the ends of the respective pipes 6, 7 in order to interconnect the tubes fieldwise in a loop. The conductor 8 will be able to carry a load current 11 (fig. 12a). The tubes' 6, 7 length and diameter will be determined on the basis of the power and voltage which have to be connected. The number of turns N1 on the main winding 2 will be determined by the reverse blocking ability for voltage and the cross-sectional area of the extent of the working flux φ2. The number of turns N2 on the control winding 4 is determined by the fields required for saturation of the magnetisable body 1, which comprises the tubes 6, 7 and the magnetic field connectors 10, 11.
[0128] Figure 14 illustrates a special design of the main winding 2 in a device not according to the invention. In reality, the solution in fig. 14 differs from that illustrated in figs. 12 and 13 only by the fact that instead of a single insulated conductor 8 which is passed through the pipes 6 and 7, two separate oppositely directed conductors, so-called primary conductors 8 and secondary conductors 8' are employed, in order thereby to achieve a voltage converter function for the magnetically influenced device not according to the invention. This will now be explained in more detail. The design is basically similar to that illustrated in figs. 11, 12 and 13. The magnetisable body 1 comprises two parallel tubes 6 and 7. An electrically insulated primary conductor 8 is passed continuously in a path through the first tube 6 and the second tube 7 N1 number of times, where N1 = 1, ... r, with the primary conductor 8 extending in the opposite direction through the two tubes 6 and 7. An electrically insulated secondary conductor 8' is passed continuously in a path through the first tube 6 and the second tube 7 N1' number of times, where N1' = 1, ... r, with the secondary conductor 8' extending in the opposite direction relative to the primary conductor 8 through the two tubes 6 and 7. At least one combined control and magnetisation winding 4 and 4' is wound round the first tube 6 and the second tube 7 respectively, with the result that the field direction created on the said tube is oppositely directed. As for the embodiment not according to the invention, and illustrated in Figs. 11, 12 and 13, magnetic field connectors 10, 11 are mounted on the end of respective tubes (6, 7) in order to interconnect the tubes 6 and 7 fieldwise in a loop, thereby forming the magnetisable body 1. Even though for the sake of simplicity the primary conductor 8 and the secondary conductor 8' are illustrated in the drawings with only one pass through the tubes 6 and 7, it will be immediately apparent that both the primary conductor 8 and the secondary conductor 8' will be able to be passed through the tubes 6 and 7 N1 and N1' number of times respectively. The tubes' 6 and 7 length and diameter will be determined on the basis of the power and voltage which have to be converted. For a transformer with a conversion ratio (N1:N1') equal to 10:1, in practice ten conductors will be used as primary conductors 8 and only one secondary conductor 8'.
[0129] An embodiment, that is not according to the invention, of magnetic field connectors 10 and/or 11 is illustrated in figure 15. A magnetic field connector 10, 11 is illustrated, composed of a magnetically conducting material, wherein two preferably circular apertures 12 for the conductor 8 in the main winding 2 (see, e.g. fig. 13) are machined out of the magnetic material in the connectors 10, 11. Moreover, there is provided a gap 13 which interrupts the magnetic field path of the conductor 8. End surface 14 is the connecting surface for the magnetic field H2 from the control winding 4 consisting of conductors 9 and 9' (fig. 13).
[0130] Fig. 16 illustrates a thin insulating film 15 which will be placed between the end surface on tubes 6 and 7 and the magnetic field connector 10, 11 in a preferred variant of the above-described device that is not according to the invention.
[0131] Figures 17 and 18 illustrate other alternative variants of the above-described device that is not according to the invention, in connection with the magnetic field connectors 10, 11. Figures 19-32 illustrate several variants of the above-described device that is not according to the invention, in connection with a core 16 which, in the variants illustrated in Figures 12, 13 and 14, forms the main part of the tubes 6 and 7 which preferably together with the magnetic field connectors 10 and 11 form the magnetisable body 1.
[0132] Fig. 19 illustrates a cylindrical core part 16 which is divided lengthwise as illustrated and where there are placed one or more layers 17 of an insulating material between the two core halves 16', 16".
[0133] Fig. 20 illustrates a rectangular core part 16 and Fig. 21 illustrates a variant of this core part 16 where it is divided in two with partial sections in the lateral surface. In the variant illustrated in Fig. 21, one or more layers of an insulating material 17 are provided between the core halves 16, 16'. A further variant is illustrated in figure 22 where the partial section is placed in each corner.
[0134] Figs. 23, 24 and 25 illustrate a rectangular shape. Figures 26, 27 and 28 illustrate the same for a triangular shape. Figs. 29 and 30 illustrate an oval variant, and fmally figures 31 and 32 illustrate a hexagonal shape. In figure 31, the hexagonal shape is composed of 6 equal surfaces 18 and in Fig. 30 the hexagon consists of two parts 16' and 16". Reference numeral 17 refers to a thin insulating film.
[0135] Figures 33 and 34 illustrate a magnetic field connector 10, 11 which can be used as a control field connector between the rectangular and square main cores 16 (illustrated in figures 20-21 and 23-25 respectively). This magnetic field connector comprises three parts 10', 10" and 19.
[0136] Fig. 34 illustrates a variant of the core part or main core 16 where the end surface 14 or the connecting surface for the control flux is at right angles to the axis of the core part 16.
[0137] Fig. 35 illustrates a second variant of the core part 16 where the connecting surface 14 for the control flux is at an angle α to the axis of the core part 16.
[0138] Figures 36-38 illustrate various designs of the magnetic field connector 10, 11, which are based on the fact that the connecting surfaces 14' of the magnetic field connector 10, 11 are at the same angle as the end surfaces 14 to the core part 16.
[0139] Fig. 36 illustrates a magnetic field connector 10, 11 not according to the invention, in which different hole shapes 12 are indicated for the main winding 2 on the basis of the shape of the core part 16 (round, triangular, etc.).
[0140] In Fig. 37, the magnetic connector 10, 11 is flat. It is adapted for use with core parts 16 with right-angled end surfaces 14.
[0141] In Fig. 38, an angle α' is indicated to the magnetic field connector 10, 11, which is adapted to the angle α to the core part (figure 35), thus causing the end surface 14 and the connecting surface 14' to coincide.
[0142] In Fig. 39, a variant of the above-discussed device that is not according to the invention is illustrated with an assembly of magnetic field connectors 10, 11 and core parts 16. Figure 39b illustrates the same variant viewed from the side.
[0144] Figures 40 and 41 are a sectional illustration and view respectively of the first-mentioned embodiment of the invention, of a magnetically influenced voltage connector device. The device comprises (see figure 40b) a magnetisable body 1 comprising an external tube 20 and an internal tube 21 (or core parts 16, 16') which are concentric and made of a magnetisable material with a gap 22 between the external tube's 20 inner wall and the internal tube's 21 outer wall. Magnetic field connectors 10, 11 between the tubes 20 and 21 are mounted at respective ends thereof (fig. 40a). A spacer 23 (fig. 40a) is placed in the gap 22, thus keeping the tubes 20, 21 concentric. A combined control and magnetisation winding 4 composed of conductors 9 is wound round the internal tube 21 and is located in the said gap 22. The winding axis A2 for the control winding therefore coincides with the axis A1 of the tubes 20 and 21. An electrical current-carrying or main winding 2 composed of the current conductor 8 is passed through the internal tube 21 and along the outside of the external tube 20 N1 number of times, where N1 = 1, ... r. With the combined control and magnetisation winding 4 in co-operation with the main winding 2 or the said current-carrying conductor 8, an easily constructed but efficient magnetically influenced voltage connector is obtained. This embodiment of the device may also be modified in such a manner that the tubes 20, 21 do not have a circular cross section, but a cross section which is square, rectangular, triangular, etc.
[0145] It is also possible to wind the main winding round the internal tube 21, in which case the axis A2 of the main winding will coincide with the axis A1 of the tubes, while the control winding is wound about the tubes on the inside of 21 and the outside of 20.
[0146] Figs. 42-44 illustrate various configurations of the magnetic field connector 10, 11 which are specially adapted to the latter design of the device, i.e. as described in connection with Figures 40 and 41.
[0147] Figure 42a illustrates in section and figure 42b in a view from above a magnetic field connector 10, 11 with connecting surfaces 14' at an angle relative to the axis of the tubes 20, 21 (the core parts 16) and it is obvious that the internal 21 and external 20 tubes should also be at the same angle to the connecting surfaces 14.
[0148] Figs. 43 and 44 illustrate other variants of the magnetic field , connector 10, 11, where the connecting surfaces 14' of the control field H2 (B2) are perpendicular to the main axis of the core parts 16 (tubes 20, 21).
[0149] Figure 43 illustrates a hollow semi-toroidal magnetic field connector 10, 11 with a hollow semi-circular cross section, while figure 44 illustrates a toroidal magnetic field connector with a rectangular cross section.
[0150] A variant of the device illustrated in Figures 40 and 41 is illustrated in Fig. 45, where Figure 45a illustrates the device from the side while 45b illustrates it from above. The only difference from the voltage connector in figs. 40-41 is that a second main winding 3 is wound in the same course as the main winding 2. By this means an easily constructed, but efficient magnetically influenced voltage converter is obtained.
[0151] Figures 46 and 47 are a section and a view illustrating the other embodiment of the voltage connector with concentric tubes.
[0152] Figures 46 and 47 illustrate the voltage connector which acts as a voltage converter with joined cores. An internal reluctance-controlled core 24 is located within an external core 25 round which is wound a main winding 2. The reluctance-controlled internal core 24 has the same construction as mentioned previously under the description of figs. 40 and 41, but the only difference is that there is no main winding 2 round the core 24. It has only a control winding 4 which is located in the gap 22 between the inner 21 and outer parts forming the internal reluctance-controlled core 24, with the result that only core 24 is magnetically reluctance-controlled under the influence of a control field H2 (B2) from current in the control winding 4.
[0154] The mode of operation of the reluctance-controlled voltage connector or converter according to the invention and described in connection with figures 46 and 47 will now be described.
[0155] We shall also refer to Figure 55 which illustrates a device not according to the invention, but which illustrates the principle of the connection, figure 65 with a simplified equivalent diagram for the reluctance model where Rmk is the variable reluctance which controls the flux between the windings 2 and 3, and figure 65b which illustrates an equivalent electrical circuit for the connection where Lk is the variable inductance.
[0156] An alternating voltage V1 over winding 2 will establish a magnetisation current I1 in winding 2. This is generated by the flux φ1 + φ1' in the cores 24 and 25 which requires to be established in order to provide the bucking voltage which according to Faraday's Law is generated in 2. When there is no control current in the reluctance-controlled core 24, the flux will be divided between the cores 24 and 25 based on the reluctance in the respective cores 24 and 25.
[0157] In order to bring energy through from one winding to the other, the internal reluctance-controlled core 24 has to be supplied with control current 12.
[0158] By supplying control current 12 in the positive half-period of the alternating voltage V1 in 2, we shall obtain a half-period voltage over 2. Since the energy is transferred by flux displacement between the reluctance-controlled core 24 and the external (secondary) core 25, the reluctance-controlled core 24 will essentially be influenced by the control current 12 during the period when it is controlled in saturation, while the working flux will travel in the secondary external core 25 and interact with the primary winding 2 during the energy transfer.
[0159] When the reluctance-controlled core 24 is brought out of saturation by resetting the control flux B2 (H2) which is orthogonal to the working flux B1 (H1), the flux from the primary side will again be divided between the cores 24 and 25, and a load connected to the secondary winding 3 will only see a low reluctance and thereby high inductance and little connection between primary (VI) and secondary (V3) voltage. A voltage will be generated over the secondary winding 3, but on account of the magnitude of Lk compared to the magnetisation impedance Lm, most of the voltage (V1) from the primary winding 2 will overlay Lk. The flux from the primary winding 2 will essentially go where there is the least reluctance and where the flux path is shortest (fig. 65b).
[0160] It may also be envisaged that the external core 25 could be made controllable, in addition to having a fourth main winding wound round the internal controllable core 24. This is to enable the voltage between the cores 24 and 25 to be controlled as required.
[0161] Fig. 48 describes a further device that is not according to the invention, of a magnetically influenced voltage connector or voltage converter, where the magnetisable body 1 is so designed that the control flux B2 (H2) is connected directly without a separate magnetic field connector through the main core 16.
[0162] Fig. 48 illustrates a voltage connector, that is not according to the invention, in the form of a toroid viewed from the side. The voltage connector comprises two core parts 16 and 16', a main winding 2 and a control winding 4.
[0163] Fig. 49 illustrates a voltage connector, that is not according to the invention, equipped with an extra main winding 3 which offers the possibility of converting the voltage.
[0164] Fig. 50 illustrates the device in figure 48 in section along line VI-VI in figure 48 and figure 51 illustrates a section along line V-V. In figure 50 a circular aperture 12 is illustrated for placing the control winding 4.
[0166] Figures 52 and 53 illustrate the structure of a core 16, that is not according to the invention, without windings and where the core 16 is so designed that there is no need for an extra magnetic field connector for the control field. The core 16 has two core parts 16, 16' and an aperture 12 for a control winding 4. This design is intended for use where the magnetic material is sintered or compressed powder-moulded material. In this case it will be possible to insert closed magnetic field paths in the topology, with the result that what were previously separate connectors which were required for foil-wound cores form part of the actual core and are a productive part of the structure. The core, which forms the closed magnetic circuit without separate magnetic field connectors and which is illustrated in these figures 52 and 53, will be able to be used in all the devices that are not according to the invention even though the figures illustrate a body 1 adapted for the device illustrated, inter alia, in Figures 1 and 2.
[0167] Figure 54 illustrates a magnetically influenced voltage converter device according to the invention, where the device has an internal control core 24 consisting of an external tube 20 and an internal tube 21 which are concentric and made of a magnetisable material with a gap 22 between the external tube's 20 inner wall and the internal tube's 21 outer wall. Spacers 23 are mounted in the gap between the external tube's 20 inner wall and the internal tube's 21 outer wall. Magnetic field connectors 10, 11 are mounted between the tubes 20 and 21 at respective ends thereof. A combined control and magnetisation winding 4 is wound round the internal tube 21 and is located in the said gap 22. The device further consists of an external secondary core 25 with windings comprising a plurality of ring core coils 25', 25", 25"' etc. placed on the outside of the control core 24. Each ring core coil 25', 25", 25"' etc. consists of a ring of a magnetisable material wound round by a respective second main winding or secondary winding 3, only one of which is illustrated for the sake of clarity. A first main winding or primary winding 2 is passed through the internal tube 21 in the control core 24 and along the outside of the external cores 25 N1 number of times, where N1 = 1, ... r.
[0168] It is also possible to envisage the secondary core device being located within the control core 24, in which case the primary winding 2 will have to be passed through the ring cores 25 and along the outside of the control core 24.
[0169] Figure 55 is a schematic illustration of a magnetically influenced voltage regulator, not according to the invention, with a first reluctance-controlled core 24 and a second core 25, each of which is composed of a magnetisable material and designed in the form of a closed, magnetic circuit, the said cores being juxtaposed. At least one first electrical conductor 8 is wound on to a main winding 2 about both the first and the second core's cross-sectional profile along at least a part of the said closed circuit. At least one second electrical conductor 9 is mounted as a winding 4 in the reluctance-controlled core 24 in a form which essentially corresponds to the closed circuit. In addition, at least one third electrical conductor 27 is wound round the second core's 25 cross-sectional profile along at least a part of the closed circuit. The field direction from the first conductor's 8 winding 2 and the second conductor's 9 winding is orthogonal. By means of this solution, the first conductor 8 and the third conductor 27 form a primary winding 2 and a secondary winding 3 respectively.
[0170] Figure 56 illustrates a proposal for an electro-technical schematic symbol for the voltage connector that is not according to the invention.
[0172] Figure 58 illustrates a magnetic circuit, not according to the invention, where the control winding 4 and control flux B2 (112) are not included.
[0173] In Figs. 59 and 60 there is a proposal for an electro-technical schematic symbol for the voltage converter that is not according to the invention, where the reluctance in the control core 24 shifts magnetic flux between a core with fixed reluctance 25 and a second core with variable reluctance 24 (see for example Figure 55).
[0174] There is, of course, no restriction to having two cores with variable reluctance. The fact that we can shift flux between two cores within the same winding will be employed in order to make a magnetic switch which can switch a voltage off and on independently of the course of magnetisation in the main core. This means that we have a switch which has the same function as a GTO, except that we can choose whatever switching time we wish.
[0175] Devices that are according to the invention, and those described herein that are not according to the invention, will be able to be used in many different connections and examples will now be given of applications in which they will be particularly suitable.
[0176] Figure 61 illustrates the use of devices disclosed herein according to, and not according to, the invention in an alternating current circuit in order to control the voltage over a load RL, which may be a light source, a heat source or other load.
[0177] Figure 62 illustrates the use of devices disclosed herein according to, and not according to, the invention in a three-phase system where such a voltage connector in each phase, connected to a diode bridge, is used for a linear regulation of the output voltage from the diode bridge.
[0178] Figure 63 illustrates a use of devices disclosed herein according to, and not according to, the invention as a variable choke in DC-DC converters.
[0179] Figure 64 illustrates a use of devices disclosed herein according to, and not according to, the invention as a variable choke in a filter together with condensers. Here we have only illustrated a series and a parallel filter (64a and 64b respectively), but it is implicit that the variable inductance can be used in a number of filter topologies.
[0180] A further application of devices disclosed herein, that are not according to the invention, is that described inter alia in connection with figures 14 and 45, where proposals for schematic symbols were given in Figure 59. In this application, the voltage connector has a function as a voltage converter where a secondary winding is added. An application as a voltage regulator is also illustrated here, where the magnetisation current in the transformer connection and the leakage reactance are controllable via the control winding 4. The special feature of this system is that the transformer equations will apply, while at the same time the magnetisation current can be controlled by changing µr. In this case, therefore, the characteristic of the transformer can be regulated to a certain extent. If there is a DC excitation of one winding 2, it will be possible to obtain transformed energy through the transformer by varying µr and thereby the flux in the reluctance-controlled core instead of varying the excitation. Thus it is possible in principle to generate an AC voltage from a DC voltage by means of the fact that an alteration of the magnetisation current from the DC generator into this system will be able to be transformed to a winding on the secondary side.
[0181] An application of the invention is illustrated in Figures 46 and 47, where a variable reluctance as control core is surrounded or enclosed by one or more separate cores with separate windings, as well as Figure 55 where a device that is not according to the invention as illustrated with a first reluctance-controlled core and a second core are designed as closed magnetic circuits and are juxtaposed. We also refer to Figure 65 which illustrates an equivalent electrical circuit.
[0182] Figure 55 illustrates how the fluxes in a device that is not according to the invention travel in the cores. We wish to emphasise that the flux in the control core is connected to the flux in the working core via the windings enclosing both cores. In this system transformation of electrical energy will be able to be controlled by flux being connected to and disconnected from a control core and a working core. Since the fluxes between the cores are interconnected through Faraday's induction law, the functional dependence of the equations for the primary side and the equations for the secondary side will be controlled by the connection between the fluxes. In a linear application we will be able to control a transformation of voltages and currents between a primary winding and a secondary winding linearly by altering the reluctance in the control core, thus permitting us to introduce here the term reluctance-controlled transformer. For a switched embodiment we will be able to introduce the term reluctance-controlled switch.
[0183] The flux connection between the primary or first main winding 2 and the secondary winding or second main winding 3 will now be explained. Winding 2 which now encloses both the reluctance-controlled control core 24 and the main core 25 will establish flux in both cores. The self-inductance L1 to 2 tells how much flux, or how many flux turns are produced in the cores when a current is passed in 11 in 2. The mutual inductance between the primary winding 2 and the secondary winding 3 indicates how many of the flux turns established by 2 and I1 are turned about 2 and about the secondary winding 3.
[0184] We may, of course, also envisage the main core 25 being reluctance-controlled, but for the sake of simplicity we shall refer here to a system with a main core 25 where the reluctance is constant, and a control core 24 where the reluctance is variable.
[0185] The flux lines will follow the path which gives the highest permeance (where the permeability is highest), i.e. with the least reluctance.
[0186] In Figs. 55 and 65 we have not taken into consideration the leakage fields in the main windings 2 and 3. Fig. 55 illustrates a simplified model of the transformer, that is not according to the invention, where the primary 2 and secondary 3 windings are each wound around a transformer leg, while in practice they will preferably be wound on the same transformer leg, and in our case, for example, the outer ring core which is the main core 25 will be wound around the secondary winding 3 distributed along the entire core 25. Similarly, the primary winding 2 will be wound around the main core 25 and the control core 24 which may be located concentrically and within the main core.
[0187] Figure 65 illustrates a simplified reluctance model for the device according to the invention.
[0188] Fig. 65b illustrates a simplified electrical equivalent diagram for the connector according to the invention, where the reluctances are replaced by inductances.
[0189] A current in 2 generates flux in the cores 24 and 25:
where:
Φp = total flux established by the current in 2.
Φk = the total flux travelling through the control core 24.
Φl = part of the total flux travelling through the main core 25.
[0192] On the basis of fig. 65 we can formulate the highly simplified electrical equivalent diagram for the magnetic circuit illustrated in fig. 65b.
[0193] Figure 65b therefore illustrates the principle of the reluctance-controlled connector, where the inductance Lk absorbs the voltage from the primary side.
[0194] This inductance is controlled through the variable reluctance in the control core 24, with the result that the connection or the voltage division for a sinusoidal steady-state voltage applied to the primary winding will be approximately equal to the ratio between the inductance in the respective cores as illustrated in equation 43.
[0195] When the control core 24 is in saturation, Lk is very small compared to Lm and the voltage division will be according to the ratio between the number of turns N1/N3. When the control core is in the off state, Lk will be large and to the same extent will block voltage transformation to the secondary side.
[0196] The magnetisation of the cores relative to applied voltage and frequency is so rated that the main core 25 and the control core 24 can each separately absorb the entire time voltage integral without going into saturation. In our model the area of iron on the control and working cores is equal without this being considered as limiting for the invention.
[0197] Since the control core 24 is not in saturation on account of the main winding 2, we shall be able to reset the control core 24 independently of the working flux B1 (H1), thereby achieving the object by means of the invention of realising a magnetic switch. If necessary the main core 25 may be reset after an on pulse or a half on period by the necessary MMF being returned in the second half-period only in order to compensate for any distortions in the magnetisation current.
[0198] In a switched application, when the switch is off, i.e. when the flux on the primary winding 2 is distributed between the control core 24 and the working core 25, the flux connection between the primary 2 and the secondary 3 winding will be slight and very little energy transfer takes place between primary 2 and secondary 3 winding.
[0199] When the switch is on, i.e. when the reluctance in the control core 24 is very low (µr = 10-50) and approaching the reluctance of an air coil, we will have a very good flux connection between primary 2 and secondary 3 winding and transfer of energy.
[0200] An important application of the invention will thus be as a frequency converter with reluctance-controlled switches and a DC-AC or AC-DC converter by employing the reluctance-controlled switch in traditional frequency converter connections and rectifier connections.
[0201] A frequency converter variant may be envisaged realised by adding bits of sinus voltages from each phase in a three-phase system, each connected to a separate reluctance-controlled core which in turn is connected to one or more adding cores which are magnetically connected to the reluctance-controlled cores through a common winding through the adding cores and the reluctance-controlled cores. Parts of sinus voltages can then be connected from the reluctance-controlled cores into the adding core and a voltage with a different frequency is generated.
[0202] A DC-AC converter may be realised by connecting a DC voltage to the main winding enclosing the working core, where this time the working core is also wound round a secondary winding where we can obtain a sinus voltage by changing the flux connection between working core and control core sinusoidally.
[0203] Fig. 66 illustrates the connection for a magnetic switch. This may, of course, also act as an adjustable transformer.
[0204] Figures 67 and 67a illustrate an example of a three-phase design. All the other three-phase rectifier connectors are, of course, also feasible. By means of connection to a diode bridge or individual diodes to the respective outlets in a 12-pulse connector, an adjustable rectifier is obtained.
[0205] In the application as an adjustable transformer, it must be emphasised that the size of the reluctance-controlled core is determined by the range of adjustment which is required for the transformer, (0-100% or 80-110%) for the voltage.
[0206] Figure 67b illustrates the use of the device according to the invention as a connector in a frequency converter for converting input frequency to randomly selected output frequency and intended for operation of an asynchronous motor, for adding parts of the phase voltage generated from a 6 or 12-pulse transformer to each motor phase (figure 67b).
[0207] Fig. 68 illustrates the device used as a switch in a UFC (unrestricted frequency changer with forced commutation).
[0208] Fig. 69 illustrates a circuit comprising 6 devices 28-33 according to the invention. The devices 28-33 are employed as frequency converters where the period of the voltages generated is composed of parts of the fundamental frequency. This works by "letting through" only the positive half-periods or parts of the half-periods of a sinus voltage in order to make the positive new half-period in the new sinus voltage, and subsequently the negative half-periods or parts of the negative half-periods in order thereby to make the negative half-periods in the new sinus voltage. In this way a sinus voltage is generated with a frequency from 10% to 100% of the fundamental frequency. This converter also acts as a soft start since the voltage on the output is regulated via the reluctance control of the connection between the primary and the secondary winding.
[0209] In fig. 69, if the first half-period is allowed through connector no. 28 (main winding 2), the current through the secondary winding (main winding 3) in the same connector will commutate to the secondary winding (main winding 3) in connector no. 29, and on from 29 to 28, etc.
[0210] Fig. 70 illustrates the use of the device according to the invention as a DC to AC converter. Here the main winding 2 in the connector is excited by a DC voltage U1 which establishes a field H1 (B1) both in the control core 24 and in the main core 25 (these are not shown in the figure). The number of turns N1, N2, N3 and the area of iron are designed in such a manner that none of the cores are in saturation in steady state. In the event of a control signal (i.e. excitation of the control winding 4) into the control core 24, the flux B2 (H2) therein will be transferred to the main core 25 and a change in the flux B1 (H1) in this core 25 will induce a voltage in the secondary winding (main winding 3). By having a sinusoidal control current I2, a sinusoidal voltage will be able to be generated on the secondary side (main winding 3), with the same frequency as the control voltage U1.
[0212] Figure 71 illustrates a use of the device according to the invention as an AC-DC converter. The same control principle is used here as that explained above in the description of a frequency converter in fig. 69. Figure 71b illustrates a diagram of the time of the device's input and output voltage.
[0213] As mentioned previously, the voltage connector according to the invention is substantially without movable parts for the absorption of electrical voltage between a generator and a load. The function of the connector is to be able to control the voltage between the generator and the load from 0-100% by means of a small control current. A second function will be purely as a voltage switch. A further function could be forming and transforming of a voltage curve.
[0214] The new technology according to the invention will be capable of being used for upgrading existing diode rectifiers, where there is a need for regulation. In connection with 12-pulse or 24-pulse rectifier systems, it will be possible to balance voltages in the system in a simple manner while having controllable rectification from 0-100%.
[0215] With regard to the magnetic materials involved in the invention, these will be chosen on the basis of a cost/benefit function. The costs will be linked to several parameters such as availability on the market, produceability for the various solutions selected, and price. The benefit functions are based on which electro-technical function the material requires to have, including material type and magnetic properties. Magnetic properties considered to be important include hysteresis loss, saturation flux level, permeability, magnetisation capacity in the two main directions of the material and magnetostriction. The electrical units frequency, voltage and power to the energy sources and users involved in the invention will be determining for the choice of material. Suitable materials include the following:
a) Iron - silicon steel: produced as a strip of a thickness approximately 0.1mm-0.3mm and width from 10mm to 1100mm and rolled up into coils. Perhaps the most preferred for large cores on account of price and already developed production technology. For use at low frequencies.
b) Iron - nickel alloys (permalloys) and/or iron - cobalt alloys (permendur) produced as a strip rolled up into coils. These are alloys with special magnetic properties with subgroups where very special properties have been cultivated.
c) Amorphous alloys, Metglas: produced as a strip of a thickness of approximately 20µm - 50µm, width from 4mm to 200mm and rolled up into coils. Very high permeability, very low loss, can be made with almost 0 magnetostriction. Exists in a countless number of variants, iron-based, cobalt-based, etc. Fantastic properties but high price.
d) Soft ferrites: Sintered in special forms developed for the converter industry. Used at high frequencies due to small loss. Low flux density. Low loss. Restrictions on physically realisable size.
e) Compressed powder cores: Compressed iron powder alloy in special shapes developed for special applications. Low permeability, maximum approximately 400-600 to-day. Low loss, but high flux density. Can be produced in very complicated shapes.
1. A magnetically influenced current or voltage regulator, comprising:
where the winding axis (A2) for the turn or turns in the main winding (2) is at right angles to the winding axis (A4) for the turn or turns in the control winding (4) with the object of providing orthogonal magnetic fields (H1, B1; H2, B2) in the bodies and thereby controlling the behaviour of the magnetisable material relative to the field (H1,B1) in the main winding (2) by means of the field (H2,B2) in the control winding (4), characterised in that
the first and second bodies are made of a wound foil of magnetic material, and that the regulator provides a closed magnetic circuit for the orthogonal magnetic fields (H1, B1; H2, B2) by means of said first and second bodies, a first magnetic field connector (10) and a second magnetic field connector (11), said first and second magnetic field connectors magnetically interconnecting the respective end surfaces of the first and second bodies.
a first external tubular body (20) and a second internal tubular body (21) each of which is composed of a magnetisable material and provides a magnetic circuit, the said bodies (20,21) being concentric relative to each other and thus having a common axis (A1),
at least one first electrical conductor (8) wound round the tubular bodies (20, 21) for at least one turn forming a first main winding (2) and at least one second electrical conductor (9) provided in a gap (22) between the bodies (20,21) and wound around the body's common axis (A1) for at least one turn forming a second main winding or control winding (4), or
at least one first electrical conductor (8) provided in a gap (22) between the bodies (20, 21) and wound around the bodies' common axis (A1) for at least one turn forming a first main winding (2) and at least one second electrical conductor (9) wound round the tubular bodies (20, 21) for at least one turn forming a second main winding or control winding (4),
where the winding axis (A2) for the turn or turns in the main winding (2) is at right angles to the winding axis (A4) for the turn or turns in the control winding (4) with the object of providing orthogonal magnetic fields (H1, B1; H2, B2) in the bodies and thereby controlling the behaviour of the magnetisable material relative to the field (H1,B1) in the main winding (2) by means of the field (H2,B2) in the control winding (4), characterised in that
the first and second bodies are made of a wound foil of magnetic material, and that the regulator provides a closed magnetic circuit for the orthogonal magnetic fields (H1, B1; H2, B2) by means of said first and second bodies, a first magnetic field connector (10) and a second magnetic field connector (11), said first and second magnetic field connectors magnetically interconnecting the respective end surfaces of the first and second bodies.
2. A regulator according to claim 1, characterised in that the magnetic field connectors (10, 11) each comprise a gap (13) to facilitate the
insertion of the first (8) or the second conductor (9) and to interrupt the magnetic
field path of the magnetic field H1 (B1) from the conductor (8, 9).
3. A regulator according to claim 1 or 2, characterised in that it comprises a third electrical conductor (27) wound for one turn which forms a third
main winding (3), where the winding axis (A3) for the turn or turns in the third main
winding (3) coincides with or is parallel to the winding axis (A2) for the turn or
turns in the first main winding (2), thus providing a transformer effect between the
first and the third main windings when at least one of them is excited.
4. A regulator according to claim 1 or claim 2, characterised in that it comprises a third electrical conductor (27) wound for at least one turn which
forms a third main winding (3), where the winding axis (A3) for the turn or turns
in the third main winding (3) coincides with or is parallel to the winding axis (A4)
for the turn or turns in the control winding (4), thus providing a transformer effect
between the third main winding (3) and the control winding (4) when at least one of
them is excited.
5. A regulator according to any of claims 1 - 4, characterised in that it comprises an additional tubular body which provides an external core (25) which
is mounted on the outside of the first, external tubular body (20), where the bodies
(20, 21, 25) are concentric relative to each other and thus have a common axis (A1).
6. A regulator according to claim 5, characterised in that it comprises one third electrical conductor (27) wound around the external core (25)
for one turn which forms a third main winding (3), where the winding axis (A3) for
the turn or turns in the third main winding (3) coincides with or is parallel to the
winding axis (A2) for the turn or turns in the first main winding (2), thus providing
a transformer effect between the first (2) and the third main windings (3) when at
least one of them is excited or where the winding axis (A3) for the turn or turns
in the third main winding (3) coincides with or is parallel to the winding axis (A4)
for the turn or turns in the control winding (4), thus providing a transformer effect
between the third main winding (3) and the control winding when at least one of them
is excited.
7. A regulator according to claim 5 or claim 6, characterised in that the external core (25) consists of several annular parts (25', 25", etc.) and that
the first (2) and/or the third main winding (3) form individual windings around each
annular part.
8. A regulator according to any of claims 5 - 7, characterised in that the external core (25) consists of several annular parts (25', 25'', etc.) and that
the control winding (4) and/or the third main winding (3) form individual windings
around each annular part.
9. The use of a regulator according to any preceding claim as a component in a frequency
converter for converting input frequency to randomly selected output frequency, preferably
intended for operation of an asynchronous motor in a cycloconverter connection.
10. The use of a regulator according to any of claims 1 - 8 as a connector in a frequency
converter for converting input frequency to randomly selected output frequency and
intended for operation of an asynchronous motor, for summation of parts of the phase
voltage generated from a 6 or 12-pulse transformer to each motor phase.
11. The use of a regulator according to any of claims 1 - 8 as a DC to AC converter which
converts DC voltage/current to an AC voltage/current of a randomly selected output
frequency, where the stored magnetic energy in a DC-fed first main winding or primary
winding's inductance is varied by means of the orthogonal control field which influences
the inductance, thereby generating an AC voltage in the third main winding or secondary
winding in the voltage connector with frequency equal to the frequency of the flux
variation/inductance variation.
12. The use of a regulator according to claim 11, where three such variable inductance
voltage converters are interconnected in order to generate a three-phase voltage with
randomly selected output frequency which is connected to the said asynchronous machine.
13. The use of a regulator according to any of claims 1 - 8 for converting AC voltage
to DC voltage within the processing industry, where the device is used as a reluctance-controlled
variable transformer where the output voltage is proportional to the reluctance alteration
in a core which is magnetically connected in parallel or in series to an external
or internal core with a separate secondary winding, and where three or more such reluctance-controlled
transformers are connected to the known three-phase rectifier connections for 6 or
12-pulse rectifier connections for diode output stage.
14. The use of a regulator according to any of claims 1 - 8 in rectifiers for converting
AC voltage to DC voltage for use within the processing industry, where the device
forms voltage connectors which are used as variable inductances in series with the
primary-windings on known transformer connections, and where three or more such transformers
are connected to three-phase rectifier connections for 6 or 12-pulse rectifier connections
for diode output stage.
15. The use of a regulator according to any of claims 1 - 8 for AC/DC or DC/AC converters
for use in the field of switched power supply, for reduction of the size of the magnetic
voltage converter, since the device forms a reluctance-controlled variable transformer
where the output voltage is proportional to the reluctance change in a core which
is magnetically connected in parallel or in series to an external or internal core
with a separate secondary winding.
16. The use of a regulator according to claim 15, characterised in that filters in which inductance forms a part are provided with a variable inductance.
17. The use of a regulator according to any of claims 1 - 8 as a component in an adjustable
voltage compensator in the high-voltage distributor network, where the device creates
linear variable inductance.
18. The use of a regulator according to any of claims 1 - 8 as a component in an adjustable
reactive power compensator (VAR compensator), where the device creates linear variable
inductance in connection with known filter circuits where at least one condenser is
also included as an element, the device in the form of a reluctance-controlled transformer
being employed as an element in a compensator connection where capacitance of inductance
are automatically coupled in and adjusted to the extent required to compensate for
the reactive power.
19. The use of a regulator according to any of claims 1 - 8 in a system for reluctance-controlled
direct conversion of an AC voltage to a DC voltage.
20. The use of a regulator according to any of claims 1 - 8 in a system for reluctance-controlled
direction conversion of a DC voltage to an AC voltage.
1. Magnetisch beeinflusster Strom- oder Spannungsregulator, umfassend:
wobei die Wicklungsachse (A2) für die Windung oder Windungen in der Hauptwicklung (2) in einem rechten Winkel zur Wicklungsachse (A4) für die Windung oder Windungen in der Steuerwicklung (4) mit dem Ziel des Bereitstellens orthogonaler Magnetfelder (H1, B1; H2, B2) in den Körpern steht und dadurch das Verhalten des magnetisierbaren Materials relativ zum Feld (H1, B1) in der Hauptwicklung (2) mittels des Feldes (H2, B2) in der Steuerwicklung (4) steuert, gekennzeichnet dadurch, dass
die ersten und zweiten Körper aus einer gewickelten Folie magnetischen Materials hergestellt sind, und dass der Regulator mittels der ersten und zweiten Körper, eines ersten Magnetfeldverbinders (10) und eines zweiten Magnetfeldverbinders (11) einen geschlossenen Magnetkreis für die orthogonalen Magnetfelder (H1, B1, H2, B2) bereitstellt, wobei die ersten und zweiten Magnetfeldverbinder die jeweiligen Endoberflächen der ersten und zweiten Körper magnetisch verbinden.
einen ersten röhrenförmigen Körper (20) und einen zweiten, inneren röhrenförmigen Körper (21), die beide aus einem magnetisierbaren Material bestehen und einen Magnetkreis bereitstellen, wobei die Körper (20, 21) relativ zueinander konzentrisch sind und somit eine gemeinsame Achse (A1) haben,
zumindest einen ersten elektrischer Leiter (8), der um die röhrenförmigen Körper (20, 21) um zumindest eine Windung gewickelt ist, die eine erste Hauptwicklung (2) bildet, und zumindest einen zweiten elektrischen Leiter (9), der in einem Spalt (22) zwischen den Körpern (20, 21) vorgesehen ist und um die gemeinsame Achse (A1) des Körpers um zumindest eine Windung, die eine zweite Hauptwicklung oder Steuerwicklung (4) bildet, gewickelt ist, oder
zumindest einen elektrischen Leiter (8), der in einem Spalt (22) zwischen den Körpern (20, 21) vorgesehen ist und um die gemeinsame Achse (A1) der Körper um zumindest eine Windung, die eine erste Hauptwicklung (2) bildet, gewickelt ist und zumindest einen zweiten elektrischen Leiter (9), der um die röhrenförmigen Körper (20, 21) um zumindest eine Windung, die eine zweite Hauptwicklung oder Steuerwicklung (4) bildet, gewickelt ist,
wobei die Wicklungsachse (A2) für die Windung oder Windungen in der Hauptwicklung (2) in einem rechten Winkel zur Wicklungsachse (A4) für die Windung oder Windungen in der Steuerwicklung (4) mit dem Ziel des Bereitstellens orthogonaler Magnetfelder (H1, B1; H2, B2) in den Körpern steht und dadurch das Verhalten des magnetisierbaren Materials relativ zum Feld (H1, B1) in der Hauptwicklung (2) mittels des Feldes (H2, B2) in der Steuerwicklung (4) steuert, gekennzeichnet dadurch, dass
die ersten und zweiten Körper aus einer gewickelten Folie magnetischen Materials hergestellt sind, und dass der Regulator mittels der ersten und zweiten Körper, eines ersten Magnetfeldverbinders (10) und eines zweiten Magnetfeldverbinders (11) einen geschlossenen Magnetkreis für die orthogonalen Magnetfelder (H1, B1, H2, B2) bereitstellt, wobei die ersten und zweiten Magnetfeldverbinder die jeweiligen Endoberflächen der ersten und zweiten Körper magnetisch verbinden.
2. Regulator gemäß Anspruch 1, dadurch gekennzeichnet, dass die Magnetfeldverbinder (10, 11) alle einen Spalt (13) umfassen, um das Einführen
des ersten (8) oder des zweiten Leiters (9) zu erleichtern und den Magnetfeldpfad
oder das Magnetfeld H1 (B1) vom Leiter (8, 9) zu unterbrechen.
3. Regulator gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass er einen dritten elektrischen Leiter (27) umfasst, der um eine Windung gewickelt
ist, die eine dritte Hauptwicklung (3) bildet, wo die Wicklungsachse (A3) für die
Windung oder die Windungen in der dritten Hauptwicklung (3) mit der Wicklungsachse
(A2) für die Windung oder die Windungen in der ersten Hauptwicklung (2) koinzidiert
oder zu ihr parallel ist, und somit einen Transformatoreffekt zwischen den ersten
und den dritten Hauptwicklungen bereitstellt, wenn zumindest eine von ihnen angeregt
wird.
4. Regulator gemäß Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass er einen dritten elektrischen Leiter (27) umfasst, der um zumindest eine Windung
gewickelt ist, die eine dritte Hauptwicklung (3) bildet,
wobei die Wicklungsachse (A3) für die Windung oder die Windungen in der dritten Hauptwicklung (3) mit der Wicklungsachse (A4) für die Windung oder die Windungen in der Steuerwicklung (4) koinzidieren oder zu ihr parallel ist, wodurch ein Transformatoreffekt zwischen der dritten Hauptwicklung (3) und der Steuerwicklung (4) bereitgestellt wird, wenn zumindest eine von ihnen angeregt wird.
wobei die Wicklungsachse (A3) für die Windung oder die Windungen in der dritten Hauptwicklung (3) mit der Wicklungsachse (A4) für die Windung oder die Windungen in der Steuerwicklung (4) koinzidieren oder zu ihr parallel ist, wodurch ein Transformatoreffekt zwischen der dritten Hauptwicklung (3) und der Steuerwicklung (4) bereitgestellt wird, wenn zumindest eine von ihnen angeregt wird.
5. Regulator gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass er einen zusätzlichen röhrenförmigen Körper umfasst, der einen äußeren Kern (25)
bereitstellt, der auf der Außenseite des ersten, externen röhrenförmigen Körpers (20)
montiert ist, wo die Körper (20, 21, 25) konzentrisch zueinander sind und somit eine
gemeinsame Achse (A1) aufweisen.
6. Regulator gemäß Anspruch 5, dadurch gekennzeichnet, dass er einen dritten elektrischen Leiter (27) umfasst, der um den externen Kern (25)
um eine Windung gewickelt ist, welche eine dritte Hauptwicklung (3) bildet, wobei
die Wicklungsachse (A3) für die Windung oder die Windungen in der dritten Hauptwicklung
(3) mit der Wicklungsachse (A2) für die Windung oder Windungen in der ersten Hauptwicklung
(2) übereinstimmt oder parallel dazu ist, wodurch ein Transformatoreffekt zwischen
den ersten zwei und den dritten Hauptwicklungen (3) vorgesehen ist, wenn zumindest
eine von ihnen angeregt wird, oder wo die Wicklungsachse (A3) für die Windung oder
Windungen in der dritten Hauptwicklung (3) mit der Wicklungsachse (A4) für die Windung
oder die Windungen in der Steuerwicklung (4) koinzidiert oder parallel dazu ist, wodurch
ein Transformatoreffekt zwischen der dritten Hauptwicklung (3) und der Steuerwicklung
bereitgestellt wird, wenn zumindest eine von ihnen angeregt wird.
7. Regulator gemäß Anspruch 5 oder Anspruch 6, dadurch gekennzeichnet, dass der äußere Kern (25) aus mehreren ringförmigen Teilen (25', 25", etc.) besteht und
dass die erste (2) und/oder die dritte Hauptwicklung (3) individuelle Wicklungen um
jeden ringförmigen Teil bilden.
8. Regulator gemäß einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass der externe Kern (25) aus verschiedenen ringförmigen Teilen (25', 25", etc.) besteht
und dass die Steuerwicklung (4) und/oder die dritte Hauptwicklung (3) individuelle
Wicklungen um jeden ringförmigen Teil bilden.
9. Verwendung eines Regulators gemäß einem der vorstehenden Ansprüche als eine Komponente
in einem Frequenzwandler zum Umwandeln von Eingangsfrequenz zu beliebig ausgewählter
Ausgangsfrequenz, vorzugsweise vorgesehen für den Betrieb eines asynchronen Motors
in einer Direktumrichterverbindung.
10. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 als ein Verbinder in
einem Frequenzwandler zum Umwandeln einer Eingangsfrequenz in eine beliebig ausgewählte
Ausgangsfrequenz und vorgesehen zum Betrieb eines asynchronen Motors zum Summieren
der Teile der aus einem 6 oder 12-Pulstransformator erzeugten Phasenspannung an jede
Motorphase.
11. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 als ein Gleichstrom-
oder Wechselstromwandler, der Gleichstromspannung/-Strom in eine Wechselstromspannung/-Strom
einer beliebig ausgewählten Ausgangsfrequenz umwandelt, wo die gespeicherte magnetische
Energie in einer Gleichstrom-betriebenen ersten Hauptwicklung oder Primärwicklungsinduktanz
mittels des orthogonalen Steuerfeldes variiert wird, welches die Induktion beeinflusst,
wodurch eine Wechselspannung in der dritten Hauptwicklung oder der sekundären Wicklung
im Spannungsverbinder mit einer Frequenz gleich der Frequenz der Fluxvariation/Induktionsvariation
erzeugt wird.
12. Verwendung eines Regulators gemäß Anspruch 11, wo drei solche variablen Induktionsspannungswandler
verbunden sind, um eine Dreiphasenspannung mit beliebig ausgewählter Ausgangsfrequenz
zu erzeugen, die mit der asynchronen Maschine verbunden ist.
13. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 zum Umwandeln von Wechselspannung
in Gleichspannung innerhalb der Prozessindustrie, wo die Vorrichtung als ein Magnetwiderstand-gesteuerter
variabler Transformator verwendet wird, bei dem die Ausgangsspannung proportional
zur Magnetwiderstandsänderung in einem Kern ist, der magnetisch parallel oder in Reihe
mit einem externen oder internen Kern mit einer getrennten sekundären Wicklung verbunden
ist und wo drei oder mehr solche Magnetwiderstand-gesteuerter Transformatoren mit
den bekannten Dreiphasengleichrichterverbindungen für 6- oder 12-Pulsgleichrichterverbindungen
für eine Diodenausgangsstufe verbunden sind.
14. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 in Gleichrichtern zum
Umwandeln von Wechselspannung in Gleichspannung zur Verwendung innerhalb der Prozessindustrie,
wobei die Vorrichtung Spannungsverbinder bildet, die als variable Induktionen in Reihe
mit den Primärwicklungen von bekannten Transformatorverbindungen verwendet werden,
und wo drei oder mehr solcher Transformatoren mit Dreiphasengleichrichterverbindungen
für 6 oder 12-Pulsgleichrichterverbindungen für eine Diodenausgangsstufe verbunden
sind.
15. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 für Gleichstrom/Wechselstrom-
oder Wechselstrom/Gleichstromwandler zur Verwendung auf dem Gebiet der Schaltnetzteile,
zur Verminderung der Größe des Magnetspannungswandlers, da die Vorrichtung einen Magnetwiderstand-gesteuerte
variablen Transformator bildet, wo die Ausgangsspannung proportional zur Magnetwiderstandsänderung
in einem Kern ist, der magnetisch parallel oder in Reihe mit einen externen oder internen
Kern mit einer getrennten Sekundärwicklung verbunden ist.
16. Verwendung eines Regulators gemäß Anspruch 15, dadurch gekennzeichnet, dass Filter, in denen eine Induktion einen Teil bildet, mit einer variablen Induktion
versehen sind.
17. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 als eine Komponente
in einem einstellbaren Spannungskompensator im Hochspannungsverteilernetzwerk, wo
die Vorrichtung lineare variable Induktion erzeugt.
18. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 als eine Komponente
in einem einstellbaren reaktiven Leistungskompensator (VAR-Kompensator), wobei die
Vorrichtung lineare variable Induktion in Verbindung mit bekannten Filterschaltungen
erzeugt, wo zumindest ein Kondensator ebenfalls als ein Element enthalten ist, wobei
die Vorrichtung in Form eines Magnetwiderstand-gesteuerten Transformators vorliegt,
der als ein Element in einer Kompensatorverbindung eingesetzt wird, wo die Kapazität
oder Induktion automatisch eingekoppelt und in dem Grad eingestellt werden, der zum
Kompensieren der reaktiven Leistung erforderlich ist.
19. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 in einem System zur
Magnetwiderstand-gesteuerten direkten Umwandlung einer Wechselspannung in eine Gleichspannung.
20. Verwendung eines Regulators gemäß einem der Ansprüche 1 bis 8 in einem System für
die Magnetwiderstand-gesteuerte Richtungsumwandlung einer Gleichspannung in eine Wechselspannung.
1. Régulateur de tension ou de courant influencé magnétiquement, comprenant:
où l'axe d'enroulement (A2) pour la spire ou les spires dans l'enroulement principal (2) se situe à angle droit de l'axe d'enroulement (A4) pour la spire ou les spires dans l'enroulement de commande (4) aux fins de fournir des champs magnétiques orthogonaux (H1, B1 ; H2, B2) dans les corps et contrôlant ainsi le comportement de la matière magnétisable par rapport au champ (H1, B1) dans l'enroulement principal (2) au moyen du champ (H2, B2) dans l'enroulement de commande (4), caractérisé en ce que
les premier et second corps sont formés d'un bobinage de matière magnétique, et en ce que le régulateur fournit un circuit magnétique fermé pour les champs magnétiques orthogonaux (H1, B1 ; H2, B2) au moyen desdits premier et second corps, d'un premier connecteur de champ magnétique (10) et d'un second connecteur de champ magnétique (11), lesdits premier et second connecteurs de champ magnétique interconnectant magnétiquement les surfaces d'extrémité respectives des premier et second corps.
un premier corps tubulaire externe (20) et un second corps tubulaire interne (21), chacun d'entre eux est formé d'une matière magnétisable et fournit un circuit magnétique, lesdits corps (20, 21) étant concentriques l'un par rapport à l'autre et ayant ainsi un axe commun (A1),
au moins un premier conducteur électrique (8) bobiné autour des corps tubulaires (20, 21) en au moins une spire formant un premier enroulement principal (2) et au moins un second conducteur électrique (9) fourni dans un entrefer (22) entre les corps (20, 21) et bobiné autour de l'axe commun (A1) du corps en au moins une spire formant un second enroulement principal ou un enroulement de commande (4), ou
au moins un premier conducteur électrique (8) fourni dans un entrefer (22) entre les corps (20, 21) et bobiné autour de l'axe commun (A1) des corps en au moins une spire formant un premier enroulement principal (2) et au moins un second conducteur électrique (9) bobiné autour des corps tubulaires (20, 21) en au moins une spire formant un second enroulement principal ou un enroulement de commande (4),
où l'axe d'enroulement (A2) pour la spire ou les spires dans l'enroulement principal (2) se situe à angle droit de l'axe d'enroulement (A4) pour la spire ou les spires dans l'enroulement de commande (4) aux fins de fournir des champs magnétiques orthogonaux (H1, B1 ; H2, B2) dans les corps et contrôlant ainsi le comportement de la matière magnétisable par rapport au champ (H1, B1) dans l'enroulement principal (2) au moyen du champ (H2, B2) dans l'enroulement de commande (4), caractérisé en ce que
les premier et second corps sont formés d'un bobinage de matière magnétique, et en ce que le régulateur fournit un circuit magnétique fermé pour les champs magnétiques orthogonaux (H1, B1 ; H2, B2) au moyen desdits premier et second corps, d'un premier connecteur de champ magnétique (10) et d'un second connecteur de champ magnétique (11), lesdits premier et second connecteurs de champ magnétique interconnectant magnétiquement les surfaces d'extrémité respectives des premier et second corps.
2. Régulateur selon la revendication 1, caractérisé en ce que les connecteurs de champ magnétique (10, 11) comprennent chacun un entrefer (13)
pour faciliter l'insertion du premier connecteur (8) ou du second connecteur (9) et
pour interrompre les lignes de force du champ magnétique H1 (B1) depuis le conducteur
(8, 9).
3. Régulateur selon la revendication 1 ou 2, caractérisé en ce qu'il comprend un troisième conducteur électrique (27) bobiné en une spire qui forme
un troisième enroulement principal (3), où l'axe d'enroulement (A3) pour la spire
ou les spires dans le troisième enroulement principal (3) coïncide avec, ou est parallèle
à, l'axe d'enroulement (A2) pour la spire ou les spires dans le premier enroulement
principal (2), offrant ainsi un effet de transformateur entre le premier enroulement
principal et le troisième enroulement principal lorsque au moins un d'entre eux est
excité.
4. Régulateur selon la revendication 1 ou 2, caractérisé en ce qu'il comprend un troisième conducteur électrique (27) bobiné en au moins une spire qui
forme un troisième enroulement principal (3), où l'axe d'enroulement (A3) pour la
spire ou les spires dans le troisième enroulement principal (3) coïncide avec, ou
est parallèle à, l'axe d'enroulement (A4) pour la spire ou les spires dans l'enroulement
de commande (4), offrant ainsi un effet de transformateur entre le troisième enroulement
principal (3) et l'enroulement de commande (4) lorsque au moins un d'entre eux est
excité.
5. Régulateur selon une quelconque des revendications 1 à 4, caractérisé en ce qu'il comprend un corps tubulaire supplémentaire qui fournit un noyau externe (25) qui
est monté à l'extérieur du premier corps tubulaire (20) externe, où les corps (20,
21, 25) sont concentriques les uns par rapport aux autres et ont ainsi un axe commun
(A1).
6. Régulateur selon la revendication 5, caractérisé en ce qu'il comprend un troisième conducteur électrique (27) bobiné autour du noyau externe
(25) en une spire qui forme un troisième enroulement principal (3), où l'axe d'enroulement
(A3) pour la spire ou les spires dans le troisième enroulement principal (3) coïncide
avec, ou est parallèle à, l'axe d'enroulement (A2) pour la spire ou les spires dans
le premier enroulement principal (2), offrant ainsi un effet de transformateur entre
le premier enroulement principal (2) et le troisième enroulement principal (3) lorsque
au moins un d'entre eux est excité, ou lorsque l'axe d'enroulement (A3) pour la spire
ou les spires dans le troisième enroulement principal (3) coïncide avec, ou est parallèle
à, l'axe d'enroulement (A4) pour la spire ou les spires dans l'enroulement de commande
(4), offrant ainsi un effet de transformateur entre le troisième enroulement principal
(3) et l'enroulement de commande, lorsque au moins un d'entre eux est excité.
7. Régulateur selon la revendication 5 ou 6, caractérisé en ce que le noyau externe (25) est composé de plusieurs parties annulaires (25', 25", etc.)
et en ce que le premier enroulement principal (2) et/ou le troisième enroulement principal (3)
forment des enroulements individuels autour de chaque partie annulaire.
8. Régulateur selon une quelconque des revendications 5 à 7, caractérisé en ce que le noyau externe (25) est composé de plusieurs parties annulaires (25', 25", etc.),
et en ce que l'enroulement de commande (4) et/ou le troisième enroulement principal (3) forment
des enroulements individuels autour de chaque partie annulaire.
9. Utilisation d'un régulateur selon une quelconque revendication précédente en tant
que composant d'un convertisseur de fréquence pour la conversion de la fréquence d'entrée
en fréquence de sortie sélectionnée de façon aléatoire, de préférence en vue du fonctionnement
d'un moteur asynchrone dans une connexion de cycloconvertisseur.
10. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 en tant
que connecteur d'un convertisseur de fréquence pour la conversion de la fréquence
d'entrée en fréquence de sortie sélectionnée de façon aléatoire, et en vue du fonctionnement
d'un moteur asynchrone, pour la sommation de parties de la tension par phase générée
à partir d'un transformateur à 6 ou 12 impulsions vers chaque phase moteur.
11. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 en tant
que convertisseur de courant continu en courant alternatif qui convertit la tension/le
courant à courant continu en tension/courant à courant alternatif d'une fréquence
de sortie sélectionnée de façon aléatoire, où l'énergie magnétique enregistrée dans
un premier enroulement principal alimenté en courant continu ou l'inductance d'un
enroulement primaire est variée au moyen d'un champ de commande orthogonale qui influence
l'inductance, générant ainsi une tension à courant alternatif dans le troisième enroulement
principal ou l'enroulement secondaire dans le connecteur de tension avec une fréquence
égale à la fréquence de la variation de flux/variation d'inductance.
12. Utilisation d'un régulateur selon la revendication 11, dans laquelle trois de ces
convertisseurs de tension d'inductance variable sont interconnectés afin de générer
une tension triphasée avec une fréquence de sortie sélectionnée de façon aléatoire
qui est connectée à ladite machine asynchrone.
13. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 pour la
conversion de tension à courant alternatif en tension à courant continu au sein de
l'industrie de fabrication, où le dispositif est utilisé comme un transformateur variable
commandé par réluctance dans lequel la tension de sortie est proportionnelle au changement
de réluctance dans un noyau qui est magnétiquement connecté en parallèle ou en série
à un noyau externe ou interne avec un enroulement secondaire séparé, et dans lequel
trois ou plus de ces transformateurs commandés par réluctance sont connectés aux connexions
connues de rectificateur triphasé pour des connexions de rectificateur à 6 ou 12 impulsions
pour l'étage de sortie de diode.
14. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 dans des
rectificateurs pour la conversion de tension à courant alternatif en tension à courant
continu pour l'utilisation dans l'industrie de fabrication, où le dispositif forme
des connecteurs de tension qui sont utilisés comme des inductances variables en série
avec les enroulements primaires sur les connexions de transformateur connues, et où
trois ou plus de ces transformateurs sont connectés aux connexions de rectificateur
triphasé pour des connexions de rectificateur à 6 ou 12 impulsions pour l'étage de
sortie de diode.
15. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 pour des
convertisseurs ca/cc ou cc/ca pour l'utilisation dans le domaine de l'alimentation
commutée, pour la réduction de la taille du convertisseur de tension magnétique, étant
donné que le dispositif forme un transformateur variable commandé par réluctance dans
lequel la tension de sortie est proportionnelle au changement de réluctance dans un
noyau qui est connecté magnétiquement en parallèle ou en série à un noyau externe
ou interne avec un enroulement secondaire séparé.
16. Utilisation d'un régulateur selon la revendication 15, caractérisé en ce que des filtres, dont une partie est formée par l'inductance, sont fournis avec une inductance
variable.
17. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 en tant
que composant d'un compensateur de tension réglable dans le réseau de distribution
haute tension, dans lequel le dispositif crée une inductance variable linéaire.
18. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 en tant
que composant d'un compensateur de puissance réactive réglable (compensateur VAR)
dans lequel le dispositif crée une inductance variable linéaire en lien avec des circuits
à filtre connus dans lesquels au moins un condensateur est également inclus comme
élément, le dispositif sous la forme d'un transformateur commandé par réluctance étant
utilisé comme un élément dans une connexion de compensateur dans lequel la capacité
d'inductance est automatiquement couplée et ajustée selon l'étendue nécessaire pour
compenser la puissance réactive.
19. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 dans un
système pour la conversion directe commandée par réluctance d'une tension à courant
alternatif en tension à courant continu.
20. Utilisation d'un régulateur selon une quelconque des revendications 1 à 8 dans un
système pour la conversion directe commandée par réluctance d'une tension à courant
continu en tension à courant altematif.