[0001] This application claims priority to Chinese Patent Application No.
201810067576.8, filed on January 24, 2018 and entitled "ADJUSTABLE INDUCTOR ASSEMBLY AND SPEAKER", the entire contents of which
are incorporated herein by reference.
TECHNICAL FIELD
[0002] The present disclosure relates to the field of electrical devices, and more particularly,
relates to an inductor assembly and a speaker.
BACKGROUND
[0003] An inductor is an element configured to convert electrical energy into magnetic energy
and store the magnetic energy, which is an important part of the power system. In
the power system, with a large number of non-linear loads being connected, problems
such as voltage fluctuations and harmonic pollution may be caused. In order to solve
these problems, the inductance of the inductor shall be adjusted during the operation.
[0004] An inductor that uses a saturation inductance method to adjust the inductance is
provided in related art. The inductor includes an core, a first coil and a second
coil which are wound on the core. The first coil is configured to be connected to
an operating circuit (the current in the operating circuit is an alternating current),
which enables the second coil to generate an induced current. When the inductance
of the inductor needs to be adjusted, it is necessary to apply direct current to the
second coil, and constantly change a magnitude of the direct current, so as to change
a saturation degree of the core, then change a magnitude of the inductance of the
first coil, and adjust an inductance of the inductor.
[0005] The inventors have found at least the following problems in the related art:
[0006] In the related art, when the magnitude of the inductance of the inductor is changed,
it is necessary to apply direct current to the second coil, and constantly change
the magnitude of the direct current, and the operation is complex.
SUMMARY
[0007] Embodiments of the present disclosure provide an inductor assembly and a speaker,
which may solve the above-mentioned technical problems. The technical solutions are
as follows:
[0008] In one aspect, embodiments of the present disclosure provide an inductor assembly.
The inductor assembly includes an inductor and a current regulating device;
wherein the inductor includes a first coil and a second coil;
wherein the first coil is configured to, after being connected to an operating circuit,
enable the second coil to generate an induced current; and
two ends of the second coil are connected to the current regulating device in series
by means of conducting wires, and the current regulating device is configured to regulate
the magnitude of the induced current generated by the second coil.
[0009] Optionally, the first coil and the second coil are both air-core coils; and
the second coil is wound on the first coil; or
the first coil is wound on the second coil; or
the first coil and the second coil are co-wound.
[0010] Optionally, the inductor further includes a magnetic circuit core;
wherein the first coil and the second coil are both wound on the magnetic circuit
core.
[0011] Optionally, the magnetic circuit core includes a closed magnetic circuit core; wherein
the first coil is wound on the closed magnetic circuit core, and the second coil is
wound on the first coil; or
the second coil is wound on the closed magnetic circuit core, and the first coil is
wound on the second coil; or
the first coil and the second coil are co-wound on the closed magnetic circuit core.
[0012] Optionally, the closed magnetic circuit core is one of a ring-shaped core, a double-C-shaped
core with notches butted against each other, and a ring-shaped core with a slit on
a side wall.
[0013] Optionally, the magnetic circuit core includes an open magnetic circuit core; wherein
the first coil is wound on the open magnetic circuit core, and the second coil is
wound on the first coil; or
the second coil is wound on the open magnetic circuit core, and the first coil is
wound on the second coil; or
the first coil and the second coil are co-wound on the open magnetic circuit core.
[0014] Optionally, the open magnetic circuit core is a rod-shaped core.
[0015] Optionally, the current regulating device includes a variable resistor or a rectifier
switching device.
[0016] Optionally, the rectifier switching device includes an insulated gate bipolar transistor,
or a thyristor, or a triode.
[0017] In another aspect, embodiments of the present disclosure provide a speaker. The speaker
includes a frequency divider;
wherein the frequency divider includes the above-mentioned inductor assembly.
[0018] In the inductor assembly according to the embodiments of the present disclosure,
a first coil, a second coil, and a current regulating device are provided, and two
ends of the second coil are connected to the current regulating device in series by
means of conducting wires. After the first coil is connected to an operating circuit,
the second coil is enabled to generate an induced current. When an inductance of the
inductor in the inductor assembly needs to be changed, only the current regulating
device needs to be regulated, and the operations are simple.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to describe the technical solutions in the embodiments of the present disclosure
more clearly, the following briefly introduces the accompanying drawings required
for describing the embodiments. Apparently, the accompanying drawings in the following
description show merely some embodiments of the present disclosure, and a person of
ordinary skill in the art may also derive other drawings from these accompanying drawings
without creative efforts.
FIG. 1 is a schematic structural circuit diagram of an inductor assembly according
to an embodiment of the present disclosure;
FIG. 2 is a schematic structural circuit diagram of an inductor assembly according
to an embodiment of the present disclosure;
FIG. 3 is a schematic structural circuit diagram of an inductor assembly according
to an embodiment of the present disclosure;
FIG. 4 is a schematic structural circuit diagram of an inductor assembly according
to an embodiment of the present disclosure;
FIG. 5 is a schematic structural circuit diagram of an inductor assembly according
to an embodiment of the present disclosure
FIG. 6 is a schematic structural circuit diagram of an inductor assembly according
to an embodiment of the present disclosure; and
FIG. 7 is a schematic structural diagram of a triode according to an embodiment of
the present disclosure.
[0020] reference numerals and denotations thereof:
1 -first coil,
2-second coil,
3-variable resistor,
4-closed magnetic circuit core,
5-current regulating device, and
6-open magnetic circuit core.
DETAILED DESCRIPTION
[0021] For clearer descriptions of the objects, technical solutions and advantages in the
present disclosure, the present disclosure is described in detail below in combination
with the accompanying drawings.
[0022] An inductor is an element configured to convert electrical energy into magnetic energy
and store the the magnetic energy, and is widely used in life. When the inductor is
used, it is often necessary to adjust the inductance of the inductor.
[0023] For the adjustment of the inductance of the inductor, a thyristor-controlled transformer
(TCT) principle is adopted for adjustment in related art I. However, because the structure
of the transformer is too complicated, it is of poor practicability. In related art
II, the saturation inductance method is configured for adjustment. The inductor used
in this method includes an core, a first coil and a second coil which are wound on
the core. During the adjustment process, apply direct current to the second coil,
and constantly change the magnitude of the direct current, so as to change the saturation
degree of the core, and then change the magnitude of the inductance of the first coil.
This method will cause current flowing through the inductor to be distorted or generate
harmonics.
[0024] In the embodiment of the present disclosure, the induced current generated by the
second coil is configured to change a magnitude of a reverse magnetic flux by changing
a magnitude of the current flowing through the second coil, so as to realize linear
adjustment of the inductance of the inductor. The adjustment process is simple, and
the air-core inductor, the open magnetic circuit inductor, and the closed-loop magnetic
circuit inductor may all be linearly adjusted, which not only responds quickly, but
also does not distort a waveform of the current flowing through the first coil.
[0025] Taking the closed-loop magnetic circuit inductor as an example, the principle of
the adjustment process is explained as follows: the closed-loop magnetic circuit inductor
includes a first coil, a second coil and a closed magnetic circuit core. When I
1N
1=I
2N
2, in an ideal state, the magnetic flux of the closed magnetic circuit core is zero.
In the formula, I
1 is the current in the first coil, N
1 is the number of turns of the first coil, I
2 is the current in the second coil, and N
2 is the number of turns of the second coil. At this moment, when the magnitude of
the current in the second coil is changed, a magnetic flux generated by the second
coil and the magnetic flux generated by the first coil cancel each other, and the
magnetic flux of the closed magnetic circuit core is also changed, such that the inductance
of the first coil is changed, thus the adjustment of the inductance of the inductor
is achieved.
[0026] In this regard, in one aspect, an embodiment of the present disclosure provides an
inductor assembly. As shown in FIG.1, the inductor includes an inductor and a current
regulating device 5. The inductor includes a first coil 1 and a second coil 2, wherein
the first coil 1 is configured to, after being connected to an operating circuit,
enable the second coil 2 to generate an induced current; two ends of the second coil
2 are connected to the current regulating device 5 in series by means of conducting
wires, and the current regulating device 5 is configured to regulate the magnitude
of the induced current generated by the second coil 2.
[0027] The first coil 1 is connected to the operating circuit (it may be understood that
the current applied at this moment to the first coil 1 is an alternating current),
which enables the second coil 2 to generate an induced current. When the inductance
of the inductor in the inductor assembly needs to be changed, the current regulating
device 5 is configured to regulate a magnitude of current in the second coil 2, and
then a magnitude of a magnetic flux of the second coil 2 is changed. At this moment,
an inductance of the inductor in the inductor assembly is regulated. Here, the "operating
circuit" refers to the circuit where a load is disposed.
[0028] In the inductor assembly according to the embodiment of the present disclosure, a
first coil 1, a second coil 2, and a current regulating device 5 are provided, and
two ends of the second coil 2 are connected to the current regulating device 5 in
series by means of conducting wires. After the first coil 1 is connected to an operating
circuit, the second coil 2 is enabled to generate an induced current. When the inductance
of the inductor in the inductor assembly needs to be changed, only the current regulating
device 5 needs to be regulated, and the operations are simple.
[0029] It should be noted that inductors with various structures are all applicable to the
inductor assembly according to the embodiment of the present disclosure, and the following
is optional:
[0030] As an example, both the first coil 1 and the second coil 2 may be arranged as air-core
coils, and the second coil 2 is wound on the first coil 1. Alternatively, the first
coil 1 is wound on the second coil 2. Alternatively, the first coil 1 and the second
coil 2 are co-wound.
[0031] With this arrangement, the inductor assembly may be applied to occasions with a wide
range of frequencies, ensuring that most audio frequencies may pass through smoothly.
[0032] Here, the term "co-wound" refers to that the first coil 1 and the second coil 2 are
mixed and co-wound to form a layer of air-core coils (in each of the above-mentioned
situation in which the second coil 2 is wound on the first coil 1, or the first coil
1 is wound on the second coil 2, the first coil 1 and the second coil 2 form two layers
of air-core coils). In a possible implementation, two wires are placed side by side
for winding. With reference to FIG. 1, it may be seen that in the above-mentioned
layer of air-core coils, the wires belonging to the first coil 1 are arranged alternately
with the wires belonging to the second coil 2.
[0033] As another example, as shown in FIG. 1, the inductor assembly further includes a
magnetic circuit core. The first coil 1 and the second coil 2 are both wound on the
magnetic circuit core.
[0034] In an optional embodiment, the magnetic circuit core includes a closed magnetic circuit
core 4, and the first coil 1 and the second coil 2 are both wound on the closed magnetic
circuit core 4, for example, as shown in FIG. 2. Optionally, the winding methods of
the first coil 1 and the second coil 2 mentioned above may be as follows: the first
coil 1 is wound on the closed magnetic core 4, and the second coil 2 is wound on the
first coil 1; or the second coil 2 is wound on the closed magnetic circuit core 4,
and the first coil 1 is wound on the second coil 2; or the first coil 1 and the second
coil 2 are co-wound on the closed magnetic circuit core 4. The embodiment of the present
disclosure does not limit the winding method of the first coil 1 and the second coil
2. For example, as shown in FIG. 3, the first coil 1 and the second coil 2 may be
wound respectively at different positions on the closed magnetic circuit core 4.
[0035] In this embodiment, the first coil 1 is connected to the operating circuit to enable
the second coil 2 to generate the induced current. When it is necessary to change
the inductance of the inductor in the inductor assembly, the current regulating device
5 is configured to regulate the magnitude of the current in the second coil 2, and
then the magnitude of the magnetic flux of the closed magnetic circuit core 4 is changed.
At this moment, the inductance of the inductor in the inductor assembly is regulated.
By this arrangement, it is ensured that the magnetic resistance of the inductor is
small and the magnetic induction intensity is large.
[0036] The closed magnetic circuit core 4 may be in various structures. For example, the
closed magnetic circuit core may be a ring structure, or a double-C-shaped structure
with notches butted against each other, or a ring structure with a slit on the side
wall, or the like.
[0037] As yet another example, the inductor assembly further includes an open magnetic circuit
core 6. The first coil 1 is wound on the open magnetic circuit core 6, and the second
coil 2 is wound on the first coil 1. Alternatively, the second coil 2 is wound on
the open magnetic circuit core 6, and the first coil 1 is wound on the second coil
2. Alternatively, the first coil 1 and the second coil 2 are co-wound on the open
magnetic circuit core 6. For the schematic diagram of the winding methods, reference
may be made to FIG. 4.
[0038] The first coil 1 is connected to the operating circuit to enable the second coil
2 to generate the induced current. When it is necessary to change the inductance of
the inductor in the inductor assembly, the current regulating device 5 is configured
to regulate the magnitude of the current in the second coil 2, and then the magnitude
of the magnetic flux of the open magnetic circuit core 6 is changed. At this moment,
the inductance of the inductor in the inductor assembly is regulated. By this arrangement,
it is ensured that the magnetic resistance of the inductor is small and the magnetic
induction intensity is large.
[0039] The embodiment of the present disclosure does not limit the structure of the open
magnetic circuit core 6. For example, the open magnetic circuit core 6 may be a rod-shaped
structure.
[0040] In an optional embodiment, the current regulating device 5 includes a variable resistor
3 or a rectifier switching device. Next, the variable resistor 3 and the rectifier
switching device are described respectively:
[0041] The variable resistor 3: the variable resistor 3 is a resistor whose resistance may
be adjusted. As shown in FIG. 5, the second coil 2 may be connected in series to the
variable resistor 3 through wires (or another optional connection method), then the
total resistance of the circuit where the second coil 2 is disposed is equal to the
sum of the resistance of the second coil 2 and that of the variable resistor 3. When
the inductance of the inductor needs to be adjusted, the resistance value of the variable
resistor 3 is adjusted, so as to change the total resistance of the circuit where
the second coil 2 is disposed, thereby changing the current of the circuit where the
second coil 2 is disposed. Afterwards, the magnetic flux of the second coil 2 is changed,
and the inductance of the first coil 1 is changed accordingly. At this moment, the
inductance of the inductor is regulated.
[0042] The rectifier switching device: optionally, the rectifier switching device includes
an insulated gate bipolar transistor, or a thyristor, or a triode.
[0043] The insulated gate bipolar transistor (IGBT): it is a semiconductor element with
a switching function. The application circuit of the IGBT is shown in FIG. 6 in which
D1, D2, D3, D4, and D5 all represent diodes, C represents a capacitor, and L
1 represents an inductor. In FIG. 6, the IGBT and D5 are connected in parallel, and
the IGBT and D5 in parallel are configured as a first element, then the first element
and the inductor L
1 are connected in series to form a first sub-circuit. The first sub-circuit is connected
in parallel to the capacitor C to form a branch circuit. After the first coil 1 is
connected to the operating circuit, two ends of the second coil 2 are connected in
series to the branch circuit by D
2 and D
3 when the direction of the current I
2 in the second coil 2 is the direction shown in FIG. 6. Accordingly, when the direction
of the current I
2 in the second coil 2 is opposite to the direction shown in FIG. 6, two ends of the
second coil 2 are connected in series to the branch circuit through D
1 and D
4. It can be seen that the second coil 2 is always connected in series to the branch
circuit, that is, the circuit where the second coil 2 is disposed is always a closed
circuit.
[0044] Further, the switching state of the IGBT may be changed by a computer. When the IGBT
is switched from the on state to the off state, the value of the current in the circuit
where the second coil 2 is disposed decreases; when the IGBT is switched from the
off state to the on state, the value of the current in the second coil 2 is increased.
Therefore, by regulating the switching frequencies of the IGBT by a computer, the
switching states of the IGBT may be switched regularly, and the value of the current
in the circuit where the second coil 2 is disposed will be changed accordingly, thus
the effective value of I
2 is changed, and the current of the circuit where the second coil 2 is disposed may
be adjusted. Therefore, the magnetic flux of the second coil 2 is changed, and the
inductance of the first coil 1 is changed accordingly. At this moment, the inductance
of the inductor is regulated.
[0045] It should be noted that, as shown in FIG. 6, the function of the capacitor C is that
when the switching state of the IGBT is changed, the capacitor may enable the current
in the circuit where the second coil 2 is disposed to change, thereby preventing the
current waveform of the circuit where the second coil 2 is disposed form being changed.
The functions of the inductor L
1 are to prevent the generation of a surge current and protect the IGBT. At the moment
when the first coil 1 is connected to the operating circuit, a peak current, which
is a surge current, is generated in the second coil 2. After the first coil 1 is connected
to the operating circuit, the induced current generated by the second coil 2 is configured
as a steady-state current, and the value of the surge current is greater than that
of the steady-state current. Thus, damages may be caused to the IGBT. Therefore, in
this embodiment, L
1 is configured to prevent the generation of the surge current to protect the IGBT.
[0046] In addition, the thyristor is also a semiconductor element with a switching function.
Moreover, the principle of regulating the inductance of inductor by a thyristor is
the same as that by an IGBT, which is not repeated herein.
[0047] The Triode: the schematic diagram of the triode is shown in FIG. 7 in which B, C
and E are the three electrodes of the triode respectively. The current from C to E
is expressed as Ic, the current from B to E is expressed as Ib, and the value of Ic
changes as the value of Ib changes. Therefore, the two electrodes C and E may be connected
to the two ends of the second coil 2 respectively, and then the current in the circuit
where the second coil 2 is disposed is Ic. After that, Ic is indirectly controlled
by controlling Ib such that the magnetic flux of the second coil 2 is changed, and
the inductance of the first coil 1 is also changed accordingly. At this moment, the
inductance of the inductor is regulated.
[0048] In another aspect, the embodiment of the present disclosure provides a speaker which
includes a frequency divider. The frequency divider includes the above-mentioned inductor
assembly.
[0049] It can be understood by those skilled in the art that the speaker also has the above
advantages of the inductor assembly. By using the inductor assembly provided in the
present disclosure, a user may regulate the inductance according to his or her own
preference, such that the frequency divider may better divide the frequencies of the
speaker and make the response frequencies of the speaker become wider.
[0050] The structure of the speaker is common in the art, and it is also common in the art
to provide a frequency divider and an inductor assembly in the speaker. For example,
a reference may be made to patents such as the application No.
CN00240314. 5 entitled HIGH-FIDELITY SPEAKER.
[0051] Described above are merely embodiments of the present disclosure, and are not intended
to limit the protection scope of the present disclosure. Any modifications, equivalent
substitutions or improvements that are made within the spirit and principle of the
present disclosure should all be included in the protection scope of the present disclosure.
1. An inductor assembly, comprising: an inductor and a current regulating device (5);
wherein
the inductor comprises: a first coil (1) and a second coil (2); wherein
the first coil (1) is configured to, after being connected to an operating circuit,
enable the second coil (2) to generate an induced current; and
two ends of the second coil (2) are connected in series to the current regulating
device (5) by a conducting wire, and the current regulating device (5) is configured
to regulate a magnitude of the induced current generated by the second coil (2).
2. The inductor assembly according to claim 1, wherein
the first coil (1) and the second coil (2) are both air-core coils; and
the second coil (2) is wound on the first coil (1); or
the first coil (1) is wound on the second coil (2); or
the first coil (1) and the second coil (2) are co-wound.
3. The inductor assembly according to claim 1, wherein the inductor assembly further
comprises a magnetic circuit core;
wherein the first coil (1) and the second coil (2) are both wound on the magnetic
circuit core.
4. The inductor assembly according to claim 3, wherein the magnetic circuit core comprises
a closed magnetic circuit core (4); wherein
the first coil (1) is wound on the closed magnetic circuit core (4), and the second
coil (2) is wound on the first coil (1); or
the second coil (2) is wound on the closed magnetic circuit core (4), and the first
coil (1) is wound on the second coil (2); or
alternatively, the first coil (1) and the second coil (2) are co-wound on the closed
magnetic circuit core (4).
5. The inductor assembly according to claim 4, wherein the closed magnetic circuit core
(4) is one of a ring-shaped core, a double-C-shaped core with notches butted against
each other, and a ring-shaped core with a slit on a side wall.
6. The inductor assembly according to claim 3, wherein the magnetic circuit core comprises:
an open magnetic circuit core (6); wherein
the first coil (1) is wound on the open magnetic circuit core (6), and the second
coil (2) is wound on the first coil (1); or
the second coil (2) is wound on the open magnetic circuit core (6), and the first
coil (1) is wound on the second coil (2); or
the first coil (1) and the second coil (2) are co-wound on the open magnetic circuit
core (6).
7. The inductor assembly according to claim 6, wherein the open magnetic circuit core
(6) is a rod-shaped core.
8. The inductor assembly according to any one of claims 1 to 7, wherein the current regulating
device (5) comprises a variable resistor (3) or a rectifier switching device.
9. The inductor assembly of claim 8, wherein the rectifier switching device comprises
an insulated gate bipolar transistor, or a thyristor, or a triode.
10. A speaker, comprising a frequency divider, wherein the frequency divider comprises
the inductor assembly as defined in any one of claims 1 to 9.