EP3736840B1 - Induktoranordnung und lautsprecher - Google Patents

Induktoranordnung und lautsprecher Download PDF

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Publication number
EP3736840B1
EP3736840B1 EP19743230.5A EP19743230A EP3736840B1 EP 3736840 B1 EP3736840 B1 EP 3736840B1 EP 19743230 A EP19743230 A EP 19743230A EP 3736840 B1 EP3736840 B1 EP 3736840B1
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European Patent Office
Prior art keywords
coil
inductor
wound
magnetic circuit
diode
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EP19743230.5A
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English (en)
French (fr)
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EP3736840A4 (de
EP3736840C0 (de
EP3736840A1 (de
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Jingran WANG
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    • 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
    • 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
    • H01F21/12—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 a 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.
  • JP2004140165A describes a variable inductor comprising: a first inductor having a prescribed inductance value, a second inductor having a prescribed inductance value which is formed to possess a mutual inductance with the first inductor, and a variable resistor connected across terminals of the second inductor. A resistance value of the variable resistor is continuously changed. Thus, the inductance value between terminals and of the first inductor can be changed.
  • CN1790565A describes a non-contact controllable reactor, which separates the dc control winding and ac operating winding in space, uses the adjustable hollow solenoid, the hollow solenoid with variable dc excitation, and the semi-iron core/circular-iron core straight solenoid with dc excitation as control winding.
  • regulating the reactance value by changing magnetic flux, controlling the magnetic saturation degree of semi-iron core, and controlling the rotation direction of magnetic domain of circular-iron core in cross magnetic field improving the nonlinear character of traditional product, reducing harmonic wave quantity and reactor volume.
  • RU2348998C1 describes a reactor provided with a closed core, its central rod being within the closed core, control winding coiled on the central rod, network winding and control unit.
  • the cylindrical rod is available in the reactor. It is situated concentrically with regard to the central rod and linked with the closed core.
  • CN202309082U describes an automatic stepless voltage regulating type reactive power compensator, which includes a capacitor set and a control portion thereof, wherein the line of the capacitor set connected to the electric network is serially connected with an adjustable reactor; the adjustable reactor comprises a primary side coil serially connected between the capacitor set and the electric network; the adjustable reactor is provided with a secondary control coil, with a bidirectional thyristor being connected between two ends of the secondary control coil; the control electrode of the bidirectional thyristor is connected with the intelligent controller; a detecting apparatus of the electric network reactive current is arranged upon the line of the capacitor set connected to the electric network; and the output of the detecting apparatus of the electric network reactive current is connected with the intelligent controller.
  • Embodiments of the present invention 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 invention provide an inductor assembly.
  • the inductor assembly includes an inductor and a current regulating device;
  • the first coil and the second coil are both air-core coils.
  • 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;
  • the closed magnetic circuit core is one of a ring-shaped core and a ring-shaped core with a slit on a side wall.
  • the magnetic circuit core includes an open magnetic circuit core; wherein
  • the open magnetic circuit core is a rod-shaped core.
  • inventions of the present invention 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 a 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.
  • the current regulating device includes 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 is an insulated gate bipolar transistor.
  • 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 rectifier switching device may include a thyristor or a triode.
  • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Amplifiers (AREA)

Claims (8)

  1. Eine Induktoranordnung, wobei
    die Induktoranordnung umfasst: einen Induktor und eine Stromregelungsvorrichtung (5); wobei
    die Induktionsspule umfasst: eine erste Spule (1) und eine zweite Spule (2); wobei
    die zweite Spule (2) konfiguriert ist, um einen induzierten Strom zu erzeugen, wenn ein Wechselstrom durch die erste Spule (1) fließt; und
    zwei Enden der zweiten Spule (2) durch einen leitenden Draht in Reihe mit der Stromregelungsvorrichtung (5) verbunden sind, und die Stromregelungsvorrichtung (5) einen bipolaren Transistor mit isoliertem Gate umfasst;
    dadurch gekennzeichnet, dass die Stromregelungsvorrichtung (5) ferner umfasst eine erste Diode D1, eine zweite Diode D2, eine dritte Diode D3, eine vierte Diode D4, einen Kondensator C, einen Induktor L1 und eine fünfte Diode D5,
    wobei:
    ein Ende der zweiten Spule (2) mit einer Kathode der ersten Diode D1 und einer Anode der dritten Diode D3 verbunden ist, ein anderes Ende der zweiten Spule (2) ist mit einer Kathode der zweiten Diode D2 und einer Anode der vierten Diode D4 verbunden ist,
    eine Anode der ersten Diode D1 mit einer Anode der zweiten Diode D2, einer Platte des Kondensators C, einer Source des bipolaren Transistors mit isoliertem Gate (IGBT) und einer Anode der fünften Diode D5 verbunden ist,
    eine Kathode der dritten Diode D3, mit einer Kathode der vierten Diode D4, einer anderen Platte des Kondensators C, und einem Ende des Induktors L1, verbunden ist,
    ein anderes Ende des Induktors L1 mit einem Drain eines bipolaren Transistors mit isoliertem Gate (IGBT) und einer Kathode der fünften Diode D5 verbunden ist.
  2. Induktoranordnung nach Anspruch 1, wobei
    die erste Spule (1) und die zweite Spule (2) beide Luftspulen sind; und
    die zweite Spule (2) auf die erste Spule (1) gewickelt ist; oder
    die erste Spule (1) auf die zweite Spule (2) gewickelt ist; oder
    die erste Spule (1) und die zweite Spule (2) sind zusammen gewickelt.
  3. Induktoranordnung nach Anspruch 1, wobei die Induktoranordnung ferner einen Magnetkreiskern umfasst;
    wobei die erste Spule (1) und die zweite Spule (2) beide auf den Magnetkreiskern gewickelt sind.
  4. Induktoranordnung nach Anspruch 3, wobei der Magnetkreiskern einen geschlossenen Magnetkreiskern (4) umfasst; wobei
    die erste Spule (1) auf den geschlossenen Magnetkreiskern (4) gewickelt ist, und die zweite Spule (2) auf die erste Spule (1) gewickelt ist; oder
    die zweite Spule (2) auf den Kern (4) des geschlossenen Magnetkreises gewickelt ist, und die erste Spule (1) auf die zweite Spule (2) gewickelt ist; oder
    alternativ dazu die erste Spule (1) und die zweite Spule (2) gemeinsam auf den Kern (4) des geschlossenen Magnetkreises gewickelt sind.
  5. Induktoranordnung nach Anspruch 4, wobei der Kern des geschlossenen Magnetkreises (4) entweder ein ringförmiger Kern oder ein ringförmiger Kern mit einem Schlitz an einer Seitenwand ist.
  6. Induktoranordnung nach Anspruch 3, wobei der Magnetkreiskern umfasst: einen offenen Magnetkreiskern (6); wobei
    die erste Spule (1) auf den offenen Magnetkreiskern (6) gewickelt ist, und die zweite Spule (2) auf die erste Spule (1) gewickelt ist; oder
    die zweite Spule (2) auf den offenen Magnetkreiskern (6) gewickelt ist, und die erste Spule (1) auf die zweite Spule (2) gewickelt ist; oder
    die erste Spule (1) und die zweite Spule (2) gemeinsam auf den offenen Magnetkreiskern (6) gewickelt sind.
  7. Induktoranordnung nach Anspruch 6, wobei der offene Magnetkreiskern (6) ein stabförmiger Kern ist.
  8. Lautsprecher mit einem Frequenzteiler, wobei der Frequenzteiler die in einem der Ansprüche 1 bis 7 definierte Induktoranordnung umfasst.
EP19743230.5A 2018-01-24 2019-01-23 Induktoranordnung und lautsprecher Active EP3736840B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810067576.8A CN108447665A (zh) 2018-01-24 2018-01-24 一种可调电感器组件及音箱
PCT/CN2019/072866 WO2019144887A1 (zh) 2018-01-24 2019-01-23 电感器组件及音箱

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EP3736840A1 EP3736840A1 (de) 2020-11-11
EP3736840A4 EP3736840A4 (de) 2021-03-10
EP3736840B1 true EP3736840B1 (de) 2023-08-23
EP3736840C0 EP3736840C0 (de) 2023-08-23

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CN108447665A (zh) * 2018-01-24 2018-08-24 北京金科华业测控技术有限公司 一种可调电感器组件及音箱
CN110379611A (zh) * 2019-06-26 2019-10-25 东南大学 一种具有永磁偏置的直流电流控制电感调谐装置
CN112350204A (zh) * 2019-11-20 2021-02-09 邹虚 一种移动式变电站
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CN119786227B (zh) * 2025-03-07 2025-05-09 深圳市海瑞思自动化科技有限公司 一种质谱用射频线圈电感量调节装置

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WO2019144887A1 (zh) 2019-08-01
EP3736840A4 (de) 2021-03-10
EP3736840C0 (de) 2023-08-23
CN111954913A (zh) 2020-11-17
EP3736840A1 (de) 2020-11-11

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