EP3736840A1 - Inductor assembly and speaker - Google Patents
Inductor assembly and speaker Download PDFInfo
- Publication number
- EP3736840A1 EP3736840A1 EP19743230.5A EP19743230A EP3736840A1 EP 3736840 A1 EP3736840 A1 EP 3736840A1 EP 19743230 A EP19743230 A EP 19743230A EP 3736840 A1 EP3736840 A1 EP 3736840A1
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- Prior art keywords
- coil
- wound
- inductor
- magnetic circuit
- core
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 description 12
- 230000004907 flux Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/12—Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
Definitions
- the present disclosure relates to the field of electrical devices, and more particularly, relates to an inductor assembly and a speaker.
- 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.
- problems such as voltage fluctuations and harmonic pollution may be caused.
- the inductance of the inductor shall be adjusted during the operation.
- 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.
- 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.
- 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:
- inventions 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.
- 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.
- the inductor further includes a magnetic circuit core; wherein the first coil and the second coil are both wound on the magnetic circuit core.
- 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.
- 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.
- 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.
- the open magnetic circuit core is a rod-shaped core.
- the current regulating device includes a variable resistor or a rectifier switching device.
- the rectifier switching device includes an insulated gate bipolar transistor, or a thyristor, or a triode.
- inventions of the present disclosure provide a speaker.
- the speaker includes a frequency divider; wherein the frequency divider includes the above-mentioned inductor assembly.
- 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.
- 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.
- 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.
- 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.
- the closed-loop magnetic circuit inductor includes a first coil, a second coil and a closed magnetic circuit core.
- I 1 N 1 I 2 N 2
- the magnetic flux of the closed magnetic circuit core is zero.
- 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
- N 2 is the number of turns of the second coil.
- an embodiment of the present disclosure provides an inductor assembly.
- 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.
- 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.
- 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.
- the "operating circuit” refers to the circuit where a load is disposed.
- 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.
- 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.
- inductors with various structures are all applicable to the inductor assembly according to the embodiment of the present disclosure, and the following is optional:
- 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.
- the first coil 1 is wound on the second coil 2.
- the first coil 1 and the second coil 2 are co-wound.
- the inductor assembly may be applied to occasions with a wide range of frequencies, ensuring that most audio frequencies may pass through smoothly.
- 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).
- two wires are placed side by side for winding.
- 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.
- 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.
- 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 .
- 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.
- the first coil 1 and the second coil 2 may be wound respectively at different positions on the closed magnetic circuit core 4.
- the first coil 1 is connected to the operating circuit to enable the second coil 2 to generate the induced current.
- 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.
- the closed magnetic circuit core 4 may be in various structures.
- 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.
- 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.
- 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.
- the first coil 1 and the second coil 2 are co-wound on the open magnetic circuit core 6.
- the first coil 1 is connected to the operating circuit to enable the second coil 2 to generate the induced current.
- 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.
- the embodiment of the present disclosure does not limit the structure of the open magnetic circuit core 6.
- the open magnetic circuit core 6 may be a rod-shaped structure.
- the current regulating device 5 includes a variable resistor 3 or a rectifier switching device.
- the variable resistor 3 and the rectifier switching device are described respectively:
- 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.
- 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.
- 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.
- the rectifier switching device optionally, the rectifier switching device includes an insulated gate bipolar transistor, or a thyristor, or a triode.
- 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.
- 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.
- 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.
- the switching state of the IGBT may be changed by a computer.
- 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.
- 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.
- a peak current which is a surge current
- 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.
- L 1 is configured to prevent the generation of the surge current to protect the IGBT.
- the thyristor is also a semiconductor element with a switching function.
- the principle of regulating the inductance of inductor by a thyristor is the same as that by an IGBT, which is not repeated herein.
- 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
- 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.
- 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.
- the embodiment of the present disclosure provides a speaker which includes a frequency divider.
- the frequency divider includes the above-mentioned inductor assembly.
- the speaker also has the above advantages of the inductor assembly.
- 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.
- 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.
- a reference may be made to patents such as the application No. CN00240314. 5 entitled HIGH-FIDELITY SPEAKER.
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Abstract
Description
- This application claims priority to Chinese Patent Application No.
201810067576.8, filed on January 24, 2018 - The present disclosure relates to the field of electrical devices, and more particularly, relates to an inductor assembly and a speaker.
- 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.
- 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.
- The inventors have found at least the following problems in the related art:
- 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.
- 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:
- 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. - 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. - 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. - 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. - 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.
- 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. - Optionally, the open magnetic circuit core is a rod-shaped core.
- Optionally, the current regulating device includes a variable resistor or a rectifier switching device.
- Optionally, the rectifier switching device includes an insulated gate bipolar transistor, or a thyristor, or a triode.
- 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. - 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.
- 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.
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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. - 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.
- 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.
- 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.
- 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.
- 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.
- 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 I1N1=I2N2, in an ideal state, the magnetic flux of the closed magnetic circuit core is zero. In the formula, I1 is the current in the first coil, N1 is the number of turns of the first coil, I2 is the current in the second coil, and N2 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.
- 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 acurrent regulating device 5. The inductor includes afirst coil 1 and asecond coil 2, wherein thefirst coil 1 is configured to, after being connected to an operating circuit, enable thesecond coil 2 to generate an induced current; two ends of thesecond coil 2 are connected to thecurrent regulating device 5 in series by means of conducting wires, and thecurrent regulating device 5 is configured to regulate the magnitude of the induced current generated by thesecond coil 2. - The
first coil 1 is connected to the operating circuit (it may be understood that the current applied at this moment to thefirst coil 1 is an alternating current), which enables thesecond coil 2 to generate an induced current. When the inductance of the inductor in the inductor assembly needs to be changed, thecurrent regulating device 5 is configured to regulate a magnitude of current in thesecond coil 2, and then a magnitude of a magnetic flux of thesecond 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. - In the inductor assembly according to the embodiment of the present disclosure, a
first coil 1, asecond coil 2, and acurrent regulating device 5 are provided, and two ends of thesecond coil 2 are connected to thecurrent regulating device 5 in series by means of conducting wires. After thefirst coil 1 is connected to an operating circuit, thesecond coil 2 is enabled to generate an induced current. When the inductance of the inductor in the inductor assembly needs to be changed, only thecurrent regulating device 5 needs to be regulated, and the operations are simple. - 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:
- As an example, both the
first coil 1 and thesecond coil 2 may be arranged as air-core coils, and thesecond coil 2 is wound on thefirst coil 1. Alternatively, thefirst coil 1 is wound on thesecond coil 2. Alternatively, thefirst coil 1 and thesecond coil 2 are co-wound. - 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.
- Here, the term "co-wound" refers to that the
first coil 1 and thesecond coil 2 are mixed and co-wound to form a layer of air-core coils (in each of the above-mentioned situation in which thesecond coil 2 is wound on thefirst coil 1, or thefirst coil 1 is wound on thesecond coil 2, thefirst coil 1 and thesecond coil 2 form two layers of air-core coils). In a possible implementation, two wires are placed side by side for winding. With reference toFIG. 1 , it may be seen that in the above-mentioned layer of air-core coils, the wires belonging to thefirst coil 1 are arranged alternately with the wires belonging to thesecond coil 2. - As another example, as shown in
FIG. 1 , the inductor assembly further includes a magnetic circuit core. Thefirst coil 1 and thesecond coil 2 are both wound on the magnetic circuit core. - In an optional embodiment, the magnetic circuit core includes a closed
magnetic circuit core 4, and thefirst coil 1 and thesecond coil 2 are both wound on the closedmagnetic circuit core 4, for example, as shown inFIG. 2 . Optionally, the winding methods of thefirst coil 1 and thesecond coil 2 mentioned above may be as follows: thefirst coil 1 is wound on the closedmagnetic core 4, and thesecond coil 2 is wound on thefirst coil 1; or thesecond coil 2 is wound on the closedmagnetic circuit core 4, and thefirst coil 1 is wound on thesecond coil 2; or thefirst coil 1 and thesecond coil 2 are co-wound on the closedmagnetic circuit core 4. The embodiment of the present disclosure does not limit the winding method of thefirst coil 1 and thesecond coil 2. For example, as shown inFIG. 3 , thefirst coil 1 and thesecond coil 2 may be wound respectively at different positions on the closedmagnetic circuit core 4. - In this embodiment, the
first coil 1 is connected to the operating circuit to enable thesecond coil 2 to generate the induced current. When it is necessary to change the inductance of the inductor in the inductor assembly, thecurrent regulating device 5 is configured to regulate the magnitude of the current in thesecond coil 2, and then the magnitude of the magnetic flux of the closedmagnetic 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. - 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. - As yet another example, the inductor assembly further includes an open
magnetic circuit core 6. Thefirst coil 1 is wound on the openmagnetic circuit core 6, and thesecond coil 2 is wound on thefirst coil 1. Alternatively, thesecond coil 2 is wound on the openmagnetic circuit core 6, and thefirst coil 1 is wound on thesecond coil 2. Alternatively, thefirst coil 1 and thesecond coil 2 are co-wound on the openmagnetic circuit core 6. For the schematic diagram of the winding methods, reference may be made toFIG. 4 . - The
first coil 1 is connected to the operating circuit to enable thesecond coil 2 to generate the induced current. When it is necessary to change the inductance of the inductor in the inductor assembly, thecurrent regulating device 5 is configured to regulate the magnitude of the current in thesecond coil 2, and then the magnitude of the magnetic flux of the openmagnetic 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. - The embodiment of the present disclosure does not limit the structure of the open
magnetic circuit core 6. For example, the openmagnetic circuit core 6 may be a rod-shaped structure. - In an optional embodiment, the
current regulating device 5 includes avariable resistor 3 or a rectifier switching device. Next, thevariable resistor 3 and the rectifier switching device are described respectively: - The variable resistor 3: the
variable resistor 3 is a resistor whose resistance may be adjusted. As shown inFIG. 5 , thesecond coil 2 may be connected in series to thevariable resistor 3 through wires (or another optional connection method), then the total resistance of the circuit where thesecond coil 2 is disposed is equal to the sum of the resistance of thesecond coil 2 and that of thevariable resistor 3. When the inductance of the inductor needs to be adjusted, the resistance value of thevariable resistor 3 is adjusted, so as to change the total resistance of the circuit where thesecond coil 2 is disposed, thereby changing the current of the circuit where thesecond coil 2 is disposed. Afterwards, the magnetic flux of thesecond coil 2 is changed, and the inductance of thefirst coil 1 is changed accordingly. At this moment, the inductance of the inductor is regulated. - The rectifier switching device: optionally, the rectifier switching device includes an insulated gate bipolar transistor, or a thyristor, or a triode.
- 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 L1 represents an inductor. InFIG. 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 L1 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 thefirst coil 1 is connected to the operating circuit, two ends of thesecond coil 2 are connected in series to the branch circuit by D2 and D3 when the direction of the current I2 in thesecond coil 2 is the direction shown inFIG. 6 . Accordingly, when the direction of the current I2 in thesecond coil 2 is opposite to the direction shown inFIG. 6 , two ends of thesecond coil 2 are connected in series to the branch circuit through D1 and D4. It can be seen that thesecond coil 2 is always connected in series to the branch circuit, that is, the circuit where thesecond coil 2 is disposed is always a closed circuit. - 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 thesecond 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 thesecond coil 2 is disposed will be changed accordingly, thus the effective value of I2 is changed, and the current of the circuit where thesecond coil 2 is disposed may be adjusted. Therefore, the magnetic flux of thesecond coil 2 is changed, and the inductance of thefirst coil 1 is changed accordingly. At this moment, the inductance of the inductor is regulated. - 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 thesecond coil 2 is disposed to change, thereby preventing the current waveform of the circuit where thesecond coil 2 is disposed form being changed. The functions of the inductor L1 are to prevent the generation of a surge current and protect the IGBT. At the moment when thefirst coil 1 is connected to the operating circuit, a peak current, which is a surge current, is generated in thesecond coil 2. After thefirst coil 1 is connected to the operating circuit, the induced current generated by thesecond 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, L1 is configured to prevent the generation of the surge current to protect the IGBT. - 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.
- 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 thesecond coil 2 respectively, and then the current in the circuit where thesecond coil 2 is disposed is Ic. After that, Ic is indirectly controlled by controlling Ib such that the magnetic flux of thesecond coil 2 is changed, and the inductance of thefirst coil 1 is also changed accordingly. At this moment, the inductance of the inductor is regulated. - 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.
- 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.
- 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. - 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.
Claims (10)
- 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). - 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. - 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. - 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). - 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.
- 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). - The inductor assembly according to claim 6, wherein the open magnetic circuit core (6) is a rod-shaped core.
- 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.
- The inductor assembly of claim 8, wherein the rectifier switching device comprises an insulated gate bipolar transistor, or a thyristor, or a triode.
- A speaker, comprising a frequency divider, wherein the frequency divider comprises the inductor assembly as defined in any one of claims 1 to 9.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201810067576.8A CN108447665A (en) | 2018-01-24 | 2018-01-24 | A kind of controllable impedance device assembly and speaker |
PCT/CN2019/072866 WO2019144887A1 (en) | 2018-01-24 | 2019-01-23 | Inductor assembly and speaker |
Publications (4)
Publication Number | Publication Date |
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EP3736840A1 true EP3736840A1 (en) | 2020-11-11 |
EP3736840A4 EP3736840A4 (en) | 2021-03-10 |
EP3736840C0 EP3736840C0 (en) | 2023-08-23 |
EP3736840B1 EP3736840B1 (en) | 2023-08-23 |
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EP19743230.5A Active EP3736840B1 (en) | 2018-01-24 | 2019-01-23 | Inductor assembly and speaker |
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EP (1) | EP3736840B1 (en) |
CN (2) | CN108447665A (en) |
WO (1) | WO2019144887A1 (en) |
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CN108447665A (en) * | 2018-01-24 | 2018-08-24 | 北京金科华业测控技术有限公司 | A kind of controllable impedance device assembly and speaker |
CN110379611A (en) * | 2019-06-26 | 2019-10-25 | 东南大学 | A kind of DC current control inductance tuner with permanent magnet bias |
CN112350204A (en) * | 2019-11-20 | 2021-02-09 | 邹虚 | Movable transformer substation |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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US4207530A (en) * | 1977-09-12 | 1980-06-10 | Motorola, Inc. | Electrically tunable inductor and method |
JPH05182837A (en) * | 1992-01-07 | 1993-07-23 | Matsushita Electric Ind Co Ltd | Variable inductor |
US20040012472A1 (en) * | 1997-11-28 | 2004-01-22 | Christian Sasse | Flux control for high power static electromagnetic devices |
CN2455028Y (en) * | 2000-11-29 | 2001-10-17 | 梁耀辉 | High-fidelity voice |
JP2004140165A (en) * | 2002-10-17 | 2004-05-13 | Matsushita Electric Ind Co Ltd | Variable inductor |
CN100483575C (en) * | 2005-12-23 | 2009-04-29 | 清华大学 | Non-contact controllable reactor |
RU2348998C1 (en) * | 2008-01-31 | 2009-03-10 | Александр Васильевич Григорьев | Controllable transformer-type reactor |
CN201319287Y (en) * | 2008-12-03 | 2009-09-30 | 上海铁路通信工厂 | Heavy-current hollow coil |
US20110260819A1 (en) * | 2010-04-26 | 2011-10-27 | Taiwan Semiconductor Manufacturing Co., Ltd. | Continuously tunable inductor with variable resistors |
CN202309082U (en) * | 2011-09-28 | 2012-07-04 | 武汉伏特克电气工程有限公司 | Automatic stepless voltage regulating type reactive power compensator |
CN102682955B (en) * | 2012-05-10 | 2016-09-14 | 杭州金果科技有限公司 | A kind of controllable impedance |
CN202759249U (en) * | 2012-08-23 | 2013-02-27 | 大连第二互感器集团有限公司 | Magnetic control parallel reactor |
CN203311972U (en) * | 2013-07-11 | 2013-11-27 | 哈尔滨理工大学 | Direct-current magnetic-controlled adjustable reactor with air gap |
CN204992589U (en) * | 2015-10-10 | 2016-01-20 | 张家港市博特圣电气科技有限公司 | Three -phase AC intelligent control circuit |
CN107509134A (en) * | 2017-10-10 | 2017-12-22 | 李龙根 | A kind of earphone second order passive frequency divider |
CN108447665A (en) * | 2018-01-24 | 2018-08-24 | 北京金科华业测控技术有限公司 | A kind of controllable impedance device assembly and speaker |
-
2018
- 2018-01-24 CN CN201810067576.8A patent/CN108447665A/en active Pending
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- 2019-01-23 CN CN201980021874.6A patent/CN111954913A/en active Pending
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WO2019144887A1 (en) | 2019-08-01 |
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EP3736840A4 (en) | 2021-03-10 |
CN111954913A (en) | 2020-11-17 |
EP3736840B1 (en) | 2023-08-23 |
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