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(11) | EP 2 071 602 A1 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Electrically excited load full voltage actuation reduced voltage sustaining driving circuit |
(57) The present invention is related to a device for the control of electrical excitation
load such as electromagnetic braking device, electromagnetic clutch, electromagnetic
switch, electromagnetic relay, electromagnetic valve, electromagnetic iron, electromagnetic
lock, and toroidal coil, etc., or driving coils installed on the excited windings
of electromotor or generator, for the full voltage actuation and reduction of excited
winding voltage and for sustaining the operation of electrical excitation through
the reduction of voltage for saving of energy.
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BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention is to use impedance component and switch device to match with
the excitation coils of electromagnetic actuation device in order to provide the full
voltage actuation to excitation coil, then switch to reduce excited winding voltage
while maintain the operation of electrical excitation for reduction of electrical
current. This invention can be used for the application of electromagnetic braking
device, electromagnetic clutch, electromagnetic switch, electromagnetic relay, electromagnetic
valve, electromagnetic iron, electromagnetic lock, and toroidal coil, or driving coils
installed on the excitation windings of electromotor or generator.
(b) Description of the Prior Art:
Conventionally electrical current is used to pass through the excitation coil to generate
the electrical excitation loading for the operation of electromagnetic effect, whereby
the installed excitation coil actuates and sustains the operation of electrical excitation,
usually are in full voltage electrical states. The excitation current required is
larger and is its drawback.
SUMMARY OF THE INVENTION
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a circuit block chart of the present invention.
Fig. 2 is a schematic view showing circuit from Fig. 1 with impedance body in parallel with capacitor for the replacement of switch device.
DETAILED DESCRIPTION OF THE PREFERRED MBODIMENTS
-- Switch device 101: mechanical or electrical switches, relay, electromagnetic switch or solid state switch component and related operating circuit, operated by human power, or mechanical power, or fluid power, or electrical energy; using alternating or direct current energy to deliver to electrical excitation load 102 or for cutting off electricity; through the switch and operation of switch device 101 allowing the electrical excitation load 102 to actuate in full voltage; then switch over to connect the excitation coil 102' and impedance 104 in series for reducing the voltage of excitation coil 102' so as to reduce electrical current while still can maintain the operation of electrical excitation;
-- Electrical excitation load 102: an electromagnetic actuation device with electrical excitation coil 102', consists of devices such as electromagnetic braking device, electromagnetic clutch, electromagnetic switch, electromagnetic relay, electromagnetic valve, electromagnetic iron, electromagnetic lock, and toroidal coil, etc. or driving coils installed on the excited windings of electromotor or generator;
-- Capacitor 103: AC or DC capacitor selected to match based on the specification of electrical excitation load 102; or other component that could store and discharge electricity, that can provide assistance to the coil 102' of electrical excitation load 102 to maintain stable operation when switching the switch device 101 between series and parallel connections to excitation coil 102'. Such capacitor 103 can either be installed or not installed based on the need;
-- Impedance body 104: (1) when used in DC power, impedance body 104 consists of coil with resistance, or resistive impedance, or other resistive impedance component or device; at actuation, through the switching control of switch device 101, it makes the two ends of the impedance body 104 short circuited so as to use full voltage to drive excitation coil 102'; after actuation the switch devices 101 on the two ends of impedance body 104 are switched to open circuit so as to make impedance body 104 and excitation coil 102' connect in series and to lower the end voltage of the excitation coil 102' to reduce electrical current while the excitation coil 102' still can maintain electrically excited operation; (2) when used in AC power, impedance body 104 consists of resistive, inductive, or capacitive impedance component, or halve wave rectification diode, etc.; at actuation, through the switching control of switch device 101, it makes the two ends of the impedance body 104 short circuited so as to use full voltage to drive excitation coil 102'; after actuation the switch devices 101 on the two ends of impedance body 104 are switched to open circuit and make impedance body 104 and excitation coil 102' to connect in series and lower the end voltage of the excitation coil 102' to reduce electrical current while the excitation coil 102' still can maintain electrically excited operation.
-- switch device (101): mechanical or electrical switches, relay, electromagnetic switch or solid state switch component and related operating circuit, operated by human power, or mechanical power, or fluid power, or electrical energy; using alternating or direct current energy to deliver to electrical excitation load (102) or for cutting off electricity; through the switch and operation of switch device (101) allowing the electrical excitation load (102) to actuate in full voltage; then switch over to connect the excitation coil (102') and impedance body (104) in series for reducing the voltage of excitation coil (102') so as to reduce electrical current while still can maintain the operation of electrical excitation;
-- electrical excitation load (102): an electromagnetic actuation device with electrical excitation coil (102'), consists of devices such as electromagnetic braking device, electromagnetic clutch, electromagnetic switch, electromagnetic relay, electromagnetic valve, electromagnetic iron, electromagnetic lock, and toroidal coil, etc. or driving coils installed on the excited windings of electromotor or generator;
-- capacitor (103): AC or DC capacitor selected to match based on the specification of electrical excitation load (102); or other component that could store and discharge electricity, that can provide assistance to the coil (102') of electrical excitation load (102) to maintain stable operation when switching the switch device (101) between series and parallel connections to excitation coil (102'); such capacitor (103) can either be installed or not installed based on the need;
-- impedance body (104): (1) when used in DC power, impedance body (104) consists of coil with resistance, or resistive impedance, or other resistive impedance component or device; at actuation, through the switching control of switch device (101), it makes the two ends of the impedance body (104) short circuited so as to use full voltage to drive excitation coil (102'); after actuation the switch devices (101) on the two ends of impedance body (104) are switched to open circuit so as to make impedance body (104) and excitation coil (102') connect in series and to lower the end voltage of the excitation coil (102') to reduce electrical current while the excitation coil (102') still can maintain electrically excited operation; (2) when used in AC power, impedance body (104) consists of resistive, inductive, or capacitive impedance component, or halve wave rectification diode, etc.; at actuation, through the switching control of switch device (101), it makes the two ends of the impedance body (104) short circuited so as to use full voltage to drive excitation coil (102'); after actuation the switch devices (101) on the two ends of impedance body (104) are switched to open circuit and make impedance body (104) and excitation coil (102') to connect in series and lower the end voltage of the excitation coil (102') to reduce electrical current while the excitation coil (102') still can maintain electrically excited operation.