Hybrid Inductor Device

Abstract

A hybrid inductor device includes a magnetic core and a plurality of coil windings. The magnetic core is provided with a plurality of winding regions. The plurality of coil windings are respectively wound on the plurality of winding regions, and there is a gap between the coil windings in two adjacent winding regions, wherein a winding direction of the coil windings in each winding region on the magnetic core is different from a winding direction of the plurality of coil windings in the plurality of winding regions adjacent thereto on the magnetic core, and the coil windings in each winding region are symmetrical to the plurality of coil windings in the plurality of winding regions adjacent thereto.

Description

Technical Field

[0001] The present invention relates to an inductor, and in particular to a hybrid inductor device. Background Art

[0002] Nowadays, electronic devices are booming, and electronic devices generally require external power to operate. However, the power transmission between electronic devices and power supplies often generates electromagnetic interference (such as noise). Therefore, in order to filter out electromagnetic interference, an electronic filter (such as a line filter) is generally set between the electronic device and the power supply. In the line filter, the components used to filter out electromagnetic interference are mainly common-mode inductors and differential-mode inductors, and the main components used to provide other functions (such as current limiting or reducing the frequency response of attenuation, etc.) can be non-inductive resistors.

[0003] As the development of power filters is towards miniaturization and high frequency, if a magnetic core is required for each common-mode inductor and differential-mode inductor, the internal space of the power filter will be occupied, and the power filter will not be able to meet the demand for miniaturized products. In addition, if the common-mode inductor and differential-mode inductor with different magnetic cores are used, the voltage drop problem of the coil winding will make it impossible to form a non-inductive resistor in the power filter by the common-mode inductor and the differential-mode inductor. Summary of the invention

[0004] In view of the above, an object of the present invention is to provide a hybrid inductor device, by winding multiple coil windings around a single magnetic core, so that a single core can form a common-mode inductor, a differential-mode inductor and a non-inductive resistor, thereby reducing the circuit size of the power filter and reducing the internal space occupied by the power filter to meet the product demand for miniaturization of the power filter.

[0005] To achieve the above object, the present invention provides a hybrid inductor device, comprising:

[0006] a magnetic core having a plurality of winding regions; and

[0007] A plurality of coil windings are respectively wound on the winding areas, with a gap between the coil windings in two adjacent winding areas, wherein a winding direction of the coil windings in each winding area on the magnetic core is different from the winding direction of the coil windings in the adjacent winding areas on the magnetic core, and the coil windings in each winding area are symmetrical to the coil windings in the adjacent winding areas.

[0008] In the hybrid inductor device, each of the coil windings has the same number of coil turns.

[0009] In the hybrid inductor device, the magnetic core is a closed magnetic core or an open magnetic core.

[0010] In the hybrid inductor device, the closed magnetic core is a circular magnetic core, an elliptical magnetic core or a rectangular magnetic core.

[0011] In the hybrid inductor device, the magnetic core is divided into a first area and a second area by a central axis thereof, and the coil windings in the winding areas of the first area are symmetrical to the coil windings in the winding areas of the second area according to the central axis.

[0012] In the hybrid inductor device, the number of the winding regions and the coil windings in the first region is two, and the number of the winding regions and the coil windings in the second region is two.

[0013] In the hybrid inductor device, a first coil winding and a second coil winding among the coil windings are respectively wound around a first winding area and a second winding area adjacent to each other among the winding areas. When a current flows through one end adjacent to each other between the first coil winding and the second coil winding to the other end of the first coil winding and the second coil winding, the first coil winding and the second coil winding form a common-mode inductor.

[0014] The hybrid inductor device described above, wherein a first coil winding and a second coil winding among the coil windings are respectively wound on a first winding area and a second winding area that are not adjacent to each other among the winding areas, wherein the first coil winding and the second coil winding have the same winding direction, and when the first coil winding and the second coil winding respectively generate the same magnetic field direction through a current, the first coil winding and the second coil winding form a differential mode inductor.

[0015] In the hybrid inductor device, a first coil winding and a second coil winding among the coil windings are respectively wound around a first winding area and a second winding area adjacent to each other among the winding areas, and adjacent ends of the first coil winding and the second coil winding are coupled to each other. When a current flows from the other end of the first coil winding to the other end of the second coil winding, the first coil winding and the second coil winding form a non-inductive resistor.

[0016] In the hybrid inductor device, the current is a DC current.

[0017] Therefore, according to some embodiments, by winding multiple coil windings around a single magnetic core and making the winding direction of each coil winding different from the winding direction of the coil windings adjacent to it, when current is generated, common-mode inductance, differential-mode inductance or non-inductive resistance is formed according to the combination of different coil windings, thereby reducing the circuit size of the power filter and reducing the internal space occupied by the power filter to meet the product demand for miniaturization of the power filter.

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a hybrid inductor device according to some embodiments of the present invention;

[0020] Figure 2 FIG. 4 is a schematic diagram of an equivalent circuit of a hybrid inductor device according to some embodiments of the present invention.

[0021] Among them, the reference numerals

[0022] 100: Hybrid inductor device

[0023] 110: Magnetic core

[0024] 111A~111D: Winding area

[0025] 113: Interval

[0026] 115A~115B: Center axis

[0027] 1151: First Area

[0028] 1153: Second Area

[0029] 130A~130D: Coil winding

[0030] TA1, TA2, TB1, TB2, TC1, TC2, TD1, TD2: terminals DETAILED DESCRIPTION

[0031] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0032] Reference Figure 1 , is a schematic diagram of a hybrid inductor device 100 according to some embodiments of the present invention. The hybrid inductor device 100 includes a magnetic core 110 and a plurality of coil windings 130A-130D. The magnetic core 110 is provided with a plurality of winding regions 111A-111D. The plurality of coil windings 130A-130D are respectively wound on the plurality of winding regions 111A-111D. Here, Figure 1Four winding regions 111A-111D and coil windings 130A-130D are taken as examples, but the present invention is not limited thereto. The winding regions 111A-111D and coil windings 130A-130D may be less than four or more than four. The magnetic core 110 may be a sintered magnetic metal oxide composed of an iron oxide mixture, such as sintered magnetic manganese-zinc iron oxide, nickel-zinc iron oxide, etc. The coil windings 130A-130D may be coil windings formed by winding metal wires around the magnetic core 110. The metal wires may be single-core copper wires, multi-core copper strands, etc.

[0033] Two adjacent winding areas 111A-111D are defined at different positions of the magnetic core 110 and do not overlap each other. A plurality of coil windings 130A-130D are respectively wound one-to-one in each winding area 111A-111D (for example, coil winding 130A is wound in winding area 111A; coil winding 130B is wound in winding area 111B; coil winding 130C is wound in winding area 111C; coil winding 130D is wound in winding area 111D), so that the coil windings 130A-130D are separated by a gap 113. Specifically, the winding area 111A is adjacent to the winding area 111B and the winding area 111C, and the coil winding 130A wound in the winding area 111A is separated from the coil winding 130B wound in the winding area 111B and the coil winding 130C wound in the winding area 111C by a gap 113; the winding area 111D is adjacent to the winding area 111B and the winding area 111C, and the coil winding 130D wound in the winding area 111D is separated from the coil winding 130B wound in the winding area 111B and the coil winding 130C wound in the winding area 111C by a gap 113. In other words, there is a gap 113 between adjacent coil windings 130A-130D (that is, adjacent coil windings 130A-130D are separated from each other by a gap 113). Therefore, the coil windings 130A-130D wound around two adjacent winding areas 111A-111D (or between adjacent coil windings 130A-130D) have lower stray capacitance, so that the hybrid inductor device 100 can have good high-frequency filtering capabilities and low-frequency filtering capabilities.

[0034] The winding direction of the coil windings 130A-130D in each winding section 111A-111D on the magnetic core 110 is different from the winding direction of the coil windings 130A-130D in the adjacent winding sections 111A-111D on the magnetic core 110. Specifically, if the winding direction of the coil windings 130A-130D in a winding section 111A-111D is wound on the magnetic core 110 along a clockwise direction of the magnetic core 110, the winding direction of the coil windings 130A-130D in the adjacent winding sections 111A-111D is wound on the magnetic core 110 along a counterclockwise direction of the magnetic core 110. For example, the winding area 111A is adjacent to the winding area 111B and the winding area 111C, the winding direction of the coil winding 130A of the winding area 111A is wound around the magnetic core 110 in a clockwise direction of the magnetic core 110, while the winding directions of the coil windings 130B and 130C of the winding areas 111B and 111C are wound around the magnetic core 110 in a counterclockwise direction of the magnetic core 110; the winding area 111D is adjacent to the winding area 111B and the winding area 111C, the winding direction of the coil winding 130D of the winding area 111D is wound around the magnetic core 110 in a clockwise direction of the magnetic core 110, while the winding directions of the coil windings 130B and 130C of the winding areas 111B and 111C are wound around the magnetic core 110 in a counterclockwise direction of the magnetic core 110.

[0035] The coil windings 130A-130D in each winding area 111A-111D are symmetrical to the coil windings 130A-130D in the adjacent winding areas 111A-111D. For example, the adjacent ends of the coil windings 130A-130D in two adjacent winding areas 111A-111D extend outwardly along an axis from the bottom of the magnetic core 110 (or extend outwardly along an axis from the top), and the non-adjacent ends extend outwardly along another axis from the top of the magnetic core 110 (or extend outwardly along another axis from the bottom). In some embodiments, the two axes may be perpendicular to each other. For example, winding area 111A is adjacent to winding area 111B and winding area 111C, and the adjacent ends (terminals TA2 and TB2) of the coil winding 130A of winding area 111A and the coil winding 130B of winding area 111B extend outward from the bottom of the magnetic core 110 along the central axis 115A of the magnetic core 110, and the non-adjacent ends (terminals TA1 and TB1) extend outward from the top of the magnetic core 110 along another central axis 115B of the magnetic core 110; the adjacent ends (terminals TA1 and TC1) of the coil winding 130A of winding area 111A and the coil winding 130C of winding area 111C extend outward from the top of the magnetic core 110 along the central axis 115B, and the non-adjacent ends (terminals TA2 and TC2) extend outward from the bottom of the magnetic core 110 along the central axis 115A. The central axis 115A and the central axis 115B are perpendicular to each other.

[0036] In some embodiments, the coil windings 130A-130D in adjacent winding areas 111A-111D have the same number of coil turns. Since the coil windings 130A-130D in adjacent winding areas 111A-111D are symmetrical to each other, they can have the same number of coil turns. For example, the winding area 111A is adjacent to the winding area 111B and the winding area 111C, and the number of coil turns of the coil winding 130A, the coil winding 130B and the coil winding 130C is five, but the present invention is not limited to this, and the number of coil turns can be greater than five or less than five; the winding area 111D is adjacent to the winding area 111B and the winding area 111C, and the number of coil turns of the coil winding 130D, the coil winding 130B and the coil winding 130C is five, but the present invention is not limited to this, and the number of coil turns can be greater than five or less than five. In some embodiments, the coil windings 130A- 130D in the winding sections 111A- 111D may all have the same number of coil turns.

[0037] In some embodiments, the magnetic core 110 can be implemented by a closed magnetic core or a non-closed magnetic core. In some embodiments, when the magnetic core 110 is implemented by a closed magnetic core, the closed magnetic core can be a circular magnetic core, an elliptical magnetic core, a rectangular magnetic core, an EE-type magnetic core, or a closed magnetic core of other shapes.

[0038] In some embodiments, the magnetic core 110 is divided into a first region 1151 and a second region 1153 by a central axis 115A, 115B thereof. Figure 1 The magnetic core 110 is shown as a first region 1151 and a second region 1153 divided by a central axis 115A for illustration. The coil windings 130A and 130C of the winding regions 111A and 111C in the first region 1151 are respectively symmetrical to the coil windings 130B and 130D of the winding regions 111B and 111D in the second region 1153 according to the central axis 115A. For example, the winding region 111A in the first region 1151 is symmetrically located to the winding region 111B in the second region 1153 according to the central axis 115A, and the winding region 111C in the first region 1151 is symmetrically located to the winding region 111D in the second region 1153 according to the central axis 115A. In other words, one end (terminals TA2, TB2, TC2, TD2) of the coil windings 130A~130D in the winding areas 111A~111D close to the center axis 115A extends outward from the bottom of the magnetic core 110 along the center axis 115A, and the other end (terminals TA1, TB1, TC1, TD1) of the coil windings 130A~130D in the winding areas 111A~111D away from the center axis 115A extends outward from the top of the magnetic core 110 along the center axis 115A, so that the coil winding 130A in the winding area 111A is symmetrical with the coil winding 130B in the winding area 111B according to the center axis 115A, and the coil winding 130C in the winding area 111C is symmetrical with the coil winding 130D in the winding area 111D according to the center axis 115A.

[0039] In some embodiments, the number of winding regions 111A, 111C and coil windings 130A, 130C in the first region 1151 is two, and the number of winding regions 111B, 111D and coil windings 130B, 130D in the second region 1153 is two. The combination of different coil windings 130A-130D enables the hybrid inductor device 100 to provide different functions (for example, common mode inductance, differential mode inductance, or non-inductive resistance).

[0040] In some embodiments, terminals TA1-TD2 are used to couple the coil windings 130A-130D to external circuit elements or electrical signals. For example, terminals TA1 and TA2 are ports for connecting the coil winding 130A to the outside; terminals TB1 and TB2 are ports for connecting the coil winding 130B to the outside; terminals TC1 and TC2 are ports for connecting the coil winding 130C to the outside; terminals TD1 and TD2 are ports for connecting the coil winding 130D to the outside. After the coil windings 130A-130D are coupled to corresponding circuit elements or electrical signals via terminals TA1-TD2, the hybrid inductor device 100 can be applied to a variety of circuit structures.

[0041] Reference Figure 1 and Figure 2 . Figure 2 Schematic diagram of an equivalent circuit of a hybrid inductor device 100 according to some embodiments of the present invention. In some embodiments, a first coil winding and a second coil winding among the coil windings 130A-130D are respectively wound around a first winding area and a second winding area adjacent to each other among the winding areas 111A-111D, and when a current flows through one end adjacent to each other between the first coil winding and the second coil winding to the other end of the first coil winding and the second coil winding, the first coil winding and the second coil winding form a common mode inductor.

[0042] For example, the coil winding 130A, the coil winding 130C, the winding area 111A and the winding area 111C are used to illustrate the first coil winding, the second coil winding, the first winding area and the second winding area, the terminal TA1 is coupled to a positive power signal at the positive end of the power source, the terminal TC1 is coupled to a negative power signal (e.g., a reference ground signal) at the negative end of the power source, the terminal TA2 is coupled to an input end of an external circuit to be filtered (hereinafter referred to as an external circuit), and the terminal TC2 is coupled to another input end of the external circuit. When the external circuit is coupled to the reference ground signal (e.g., the housing of the external circuit is grounded), due to the stray capacitance between the external circuit and the coupled reference ground signal, stray signals (e.g., common mode signals) are generated between the power source and the reference ground signal. Therefore, when a common-mode signal occurs, current (for example, common-mode current, that is, the direction of the noise current flowing through the positive and negative ends of the power supply is the same) flows through terminal TA1 to terminal TA2 of coil winding 130A and returns to the power supply through the reference ground signal of the external circuit, and flows through terminal TC1 to terminal TC2 of coil winding 130C and returns to the power supply through the reference ground signal of the external circuit, so that coil winding 130A and coil winding 130C generate magnetic fields in the same direction, thereby enhancing the inductance of coil winding 130A and coil winding 130C, that is, enhancing the inductive reactance that suppresses common-mode current (in other words, coil winding 130A and coil winding 130C at this time form a common-mode inductor), thereby achieving the effect of filtering out noise.

[0043] In some embodiments, a first coil winding and a second coil winding among the coil windings 130A~130D are respectively wound on a first winding area and a second winding area that are not adjacent to each other in the winding areas 111A~111D, wherein the first coil winding and the second coil winding have the same winding direction, and when the first coil winding and the second coil winding respectively generate the same magnetic field direction through a current, the first coil winding and the second coil winding form a differential mode inductance.

[0044] For example, the coil winding 130A, the coil winding 130D, the winding area 111A and the winding area 111D are used to illustrate the first coil winding, the second coil winding, the first winding area and the second winding area, the terminal TA1 is coupled to the positive power signal of the positive power end of the power source, the terminal TD2 is coupled to the negative power signal of the negative power end of the power source (e.g., the reference ground signal), the terminal TA1 is coupled to an input end of the external circuit, and the terminal TD2 is coupled to another input end of the external circuit. Since noise is generated between the signals of the power line (positive power signal and negative power signal), and this noise (i.e., differential mode signal) is generally coupled in series with the power line. When a differential mode signal occurs, current (for example, differential mode current, that is, the noise current and the power supply current are in the same direction) flows through terminal TA1 to terminal TA2 of coil winding 130A and flows through the external circuit, and flows from the external circuit through terminal TD2 to terminal TD1 of coil winding 130D, so that coil winding 130A and coil winding 130D with the same winding direction generate magnetic fields in the same direction (that is, generate the same magnetic field direction), thereby enhancing the inductance of coil winding 130A and coil winding 130D, that is, enhancing the inductive reactance that suppresses differential mode current (in other words, coil winding 130A and coil winding 130D at this time form differential mode inductance), thereby achieving the effect of filtering out noise.

[0045] In some embodiments, a first coil winding and a second coil winding among the coil windings 130A to 130D are respectively wound around a first winding area and a second winding area adjacent to each other among the winding areas 111A to 111D, and adjacent ends of the first coil winding and the second coil winding are coupled to each other. When a current flows from the other end of the first coil winding to the other end of the second coil winding, the first coil winding and the second coil winding form a non-inductive resistor.

[0046] For example, the first coil winding, the second coil winding, the first winding area, and the second winding area are described by using coil winding 130A, coil winding 130B, winding area 111A, and winding area 111B. Terminal TA1 is coupled to a positive power signal of a positive power terminal of a power source, and terminal TB1 is coupled to an input terminal of an external circuit. When it is desired to limit the current of the external circuit, reduce its weakened frequency response (for example, increase its load), etc., terminal TA2 is coupled to terminal TB2 (i.e., terminal TA2 and terminal TB2 are short-circuited), and the current flows through the coil winding 130A and the coil winding 130B via terminal TA1, and then flows to the external circuit. Since the coil winding 130A and the coil winding 130B generate magnetic fields in opposite directions, the magnetic fields cancel each other out and no inductive reactance is generated. In other words, the coil winding 130A and the coil winding 130B are resistors without inductive reactance (for example, they only have the resistance value of the coil) or they only have the inductance generated by a small leakage inductance, that is, the coil winding 130A and the coil winding 130B form a substantial non-inductive resistor to be used for the functions required by the external circuit (for example, current limiting, reducing the frequency response of attenuation, etc.).

[0047] In some embodiments, the current may be a direct current or an alternating current. In other words, the hybrid inductor device 100 may be used in a direct current system or an alternating current system. In some embodiments, the hybrid inductor device 100 may be suitable for a π-type filter or a T-type filter.

[0048] Therefore, according to some embodiments, by winding multiple coil windings around a single magnetic core and making the winding direction of each coil winding different from the winding direction of the coil windings adjacent to it, when current is generated, common-mode inductance, differential-mode inductance or non-inductive resistance is formed according to the combination of different coil windings, thereby reducing the circuit size of the power filter and reducing the internal space occupied by the power filter to meet the product demand for miniaturization of the power filter.

[0049] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A hybrid inductor device, characterized in that: Include: a magnetic core having a plurality of winding regions; and A plurality of coil windings are respectively wound on the winding areas, with a gap between the coil windings in two adjacent winding areas, wherein a winding direction of the coil windings in each winding area on the magnetic core is different from the winding direction of the coil windings in the adjacent winding areas on the magnetic core, and the coil windings in each winding area are symmetrical to the coil windings in the adjacent winding areas; A first coil winding and a second coil winding among the coil windings are respectively wound around a first winding area and a second winding area adjacent to each other among the winding areas, and adjacent ends of the first coil winding and the second coil winding are coupled to each other, and when a current flows from the other end of the first coil winding to the other end of the second coil winding, the first coil winding and the second coil winding form a non-inductive resistor; The magnetic core is divided into a first area and a second area through a central axis thereof, and the coil windings of the winding areas in the first area are symmetrical to the coil windings of the winding areas in the second area according to the central axis; The number of the winding areas and the coil windings in the first region is two, and the number of the winding areas and the coil windings in the second region is two.

2. The hybrid inductor device according to claim 1, characterized in that: Each of the coil windings has the same number of coil turns.

3. The hybrid inductor device according to claim 1, characterized in that: The magnetic core is a closed magnetic core or a non-closed magnetic core.

4. The hybrid inductor device according to claim 3, characterized in that: The closed magnetic core is a circular magnetic core, an elliptical magnetic core or a rectangular magnetic core.

5. The hybrid inductor device according to claim 1, characterized in that: Another first coil winding and another second coil winding among the coil windings are respectively wound around another first winding area and another second winding area adjacent to the winding areas. When the current flows to the other ends of the another first coil winding and the other second coil winding respectively through one adjacent end between the another first coil winding and the another second coil winding, the another first coil winding and the another second coil winding form a common mode inductance.

6. The hybrid inductor device according to claim 1, characterized in that: Another first coil winding and another second coil winding among the coil windings are respectively wound on another first winding area and another second winding area that are not adjacent to each other among the winding areas, wherein the another first coil winding and the another second coil winding have the same winding direction, and when the another first coil winding and the another second coil winding respectively generate the same magnetic field direction through the current, the another first coil winding and the another second coil winding form a differential mode inductance.

7. The hybrid inductor device according to any one of claims 1 to 6, characterized in that: This current is a DC current.

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