CN214541851U

CN214541851U - Hybrid inductor device

Info

Publication number: CN214541851U
Application number: CN202120613441.4U
Authority: CN
Inventors: 范云光
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-10-29
Anticipated expiration: 2031-03-26

Abstract

The hybrid inductor device includes a magnetic core, a first winding and a second winding. The first winding comprises a first coil with a plurality of first coil turns and a second coil with a plurality of second coil turns, and the first coil turns and the second coil turns are parallel to each other and are wound in a first winding area of the magnetic core in the same winding direction. The second winding comprises a third coil with a plurality of third coil turns and a fourth coil with a plurality of fourth coil turns, and the third coil turns and the fourth coil turns are parallel to each other and are wound in the second winding area of the magnetic core in the same winding direction. The start end of the coil in the first winding and the end of the coil in the second winding are adjacent to each other, and the end of the coil in the first winding and the start end of the coil in the second winding are adjacent to each other. The start end extends from the top surface of the magnetic core and the finish end extends from the bottom surface of the magnetic core.

Description

Hybrid inductor device

Technical Field

The present invention relates to inductors, and more particularly, to a hybrid inductor device.

Background

Electronic devices are developed rapidly, and the electronic devices generally need an external power source to operate. However, power transmission between electronic devices and power supplies often generates electromagnetic interference (e.g., noise). Therefore, in order to filter out the electromagnetic interference, an electronic filter (e.g., a line filter) is generally disposed between the electronic device and the power source. In the power filter, the components for filtering out electromagnetic interference are mainly common mode inductance and differential mode inductance, and the other components for providing other functions (e.g., current limiting or frequency response for reducing attenuation) may be non-inductive resistors.

Since the power filter is developed toward miniaturization and high frequency, if a magnetic core is provided for each common mode inductor and a differential mode inductor, the internal space of the power filter is occupied, and the power filter cannot meet the requirement of miniaturization products. In addition, if the common mode inductor and the differential mode inductor of different magnetic cores are used, the common mode inductor and the differential mode inductor cannot form a non-inductive resistor into the power filter due to the voltage drop problem of the coil winding.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a hybrid inductor device. According to some embodiments, a plurality of coil windings are wound around a single magnetic core, so that a common mode inductor, a differential mode inductor and a non-inductive resistor can be formed by the single iron core, the circuit size of the power filter can be reduced, the occupied internal space of the power filter can be reduced, and the requirement of miniaturization products of the power filter can be met. According to some embodiments, since the hybrid inductor device has a simple coil winding structure, the hybrid inductor device can be automatically wound by a winding machine (coil winding machine) without manual winding, so that the production efficiency of products is improved.

According to some embodiments, a hybrid inductive device includes a magnetic core, a first winding, and a second winding. The core defines a first winding region and a second winding region. The first winding area and the second winding area are located at different positions of the magnetic core and are separated from each other. The first winding includes a first coil and a second coil. The first coil has a plurality of first coil turns, a first start end extending from the top surface of the magnetic core, and a first finish end extending from the bottom surface of the magnetic core. The first coil turn is wound in the first winding area. The second coil has a plurality of second coil turns, a second start end extending from the top surface of the magnetic core, and a second finish end extending from the bottom surface of the magnetic core. The second coil turn is wound in the first winding area. The first coil turn and the second coil turn have the same winding direction in the first winding area. The first coil turns are respectively parallel to the second coil turns. The first starting end is adjacent to the second starting end, and the first ending end is adjacent to the second ending end. The second winding includes a third coil and a fourth coil. The third coil has a plurality of third coil turns, a third start end extending from the top surface of the magnetic core, and a third end extending from the bottom surface of the magnetic core. The third coil is wound on the second winding area. The fourth coil has a plurality of fourth coil turns, a fourth start end extending from the top surface of the magnetic core, and a fourth end extending from the bottom surface of the magnetic core. The fourth coil turn is wound in the second winding area. The third coil turn and the fourth coil turn have the same winding direction in the second winding area. The third coil turns are respectively parallel to the fourth coil turns. The third starting end is adjacent to the fourth starting end, and the third ending end is adjacent to the fourth ending end. The first start end and the second start end are adjacent to the third end and the fourth end, and the first end and the second end are adjacent to the third start end and the fourth start end.

According to some embodiments, the first and second plurality of coil turns are arranged spaced apart from each other, and the third and fourth plurality of coil turns are arranged spaced apart from each other.

In accordance with some embodiments, the plurality of first coil turns overlaps the plurality of second coil turns, and the plurality of third coil turns overlaps the plurality of fourth coil turns.

According to some embodiments, the first coil turns and the second coil turns are wound around the first winding region along a first direction, and the third coil turns and the fourth coil turns are wound around the second winding region along a second direction, wherein the first direction and the second direction are opposite to each other.

According to some embodiments, when a current flows to the first start end of the first coil and the third start end of the third coil through the first end of the first coil and the third end of the third coil, respectively, the first coil and the third coil form a common mode inductance.

According to some embodiments, when a current flows to the second end terminal of the second coil and the fourth end terminal of the fourth coil through the second start terminal of the second coil and the fourth start terminal of the fourth coil, respectively, the second coil and the fourth coil form a common mode inductor.

According to some embodiments, when a current flows to the first start end of the first coil and the fourth start end of the fourth coil through the first end of the first coil and the fourth end of the fourth coil, respectively, the first coil and the fourth coil generate a same magnetic field direction through the current to form a differential mode inductor.

According to some embodiments, when a current flows to the second start end of the second coil and the third start end of the third coil through the second end of the second coil and the third end of the third coil, respectively, the second coil and the third coil generate a same magnetic field direction through the current to form a differential mode inductor.

According to some embodiments, the first start terminal and the second start terminal are coupled to each other, and the first coil and the second coil form an inductionless resistor when a current flows from the first end terminal to the second end terminal.

According to some embodiments, the third start terminal and the fourth start terminal are coupled to each other, and the third coil and the fourth coil form an inductionless resistor when a current flows from the third end terminal to the fourth end terminal.

In summary, according to some embodiments, a plurality of windings are wound around a single magnetic core, each winding has a plurality of coils, each coil of the same winding has the same winding direction, and the turns of each coil of the same winding are parallel to each other (for example, the turns of the first coil and the turns of the second coil are parallel to each other), so that when a current is generated, a common mode inductor, a differential mode inductor or an inductionless resistor is formed according to different combinations of the coils, thereby reducing the circuit size of the power filter, and reducing the occupied internal space of the power filter, so as to meet the product requirement for miniaturization of the power filter. According to some embodiments, the winding is formed by a plurality of coils in the same winding direction, and the winding can be realized by automatic winding through the winding machine (so that time-consuming manual winding can be avoided), and the production efficiency of products is improved.

Drawings

Fig. 1 is a schematic diagram of a hybrid inductive device according to some embodiments of the present disclosure;

fig. 2 is a schematic diagram of a hybrid inductive device according to some embodiments of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a portion of the structure of some embodiments of the present disclosure;

fig. 4 is an equivalent circuit schematic diagram of a hybrid inductive device according to some embodiments of the present disclosure;

fig. 5 illustrates a common mode signal rejection application circuit of a hybrid inductive device according to some embodiments of the present disclosure;

fig. 6 is a circuit for applying differential mode signal suppression to a hybrid inductive device according to some embodiments of the present disclosure;

fig. 7 is a circuit for applying non-inductive resistance of a hybrid inductive device according to some embodiments of the present disclosure.

[ notation ] to show

10 hybrid inductor device

20: magnetic core

21 first winding region

Second winding region (23)

25: clearance

CL is the central axis

30 first winding

31 first coil

311 first coil turn

TA1 first Start

TA2 first end

33 second coil

331 second coil turn

TB1 second starting end

TB2 second end

35 part structure

40 second winding

41 third coil

411 third coil turn

TC1 third start terminal

TC2 third end

43 fourth coil

431 fourth coil turn

TD1 fourth Start

TD2 fourth end

L1 first axis

L2 second axis

200 power supply

201 positive terminal

V + positive power supply signal

203 negative terminal

V-negative supply signal

300 external circuit

301 a first input terminal

303 second input terminal

C is stray capacitance

GND ground reference signal

A1-A4 current direction

D1 first direction

D2 second direction

Detailed Description

As used herein, the terms "first" and "second" are used interchangeably to distinguish one element from another, but are not used to distinguish between, or to limit the difference between, those elements. Furthermore, the terms "coupled" and "connected," when used, refer to two or more elements being in direct physical or electrical contact with each other, or in indirect physical or electrical contact with each other; for example, if a first device couples to a second device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections.

Referring to fig. 1, fig. 1 is a schematic diagram of a hybrid inductor device 10 according to some embodiments of the present disclosure. The hybrid inductive device 10 includes a magnetic core 20, a first winding 30, and a second winding 40. The magnetic core 20 may be a sintered magnetic metal oxide composed of a mixture of iron oxides, such as sintered magnetic manganese-zinc-iron oxide, nickel-zinc-iron oxide, or the like. The first winding 30 and the second winding 40 may be implemented by metal wires. The metal wire can be a single core wire, a multi-core stranded wire and the like. Although fig. 1 shows only two windings, the present invention is not limited thereto, and the number of windings of the hybrid inductor device 10 may be adjusted according to actual design requirements.

The core 20 defines a first winding region 21 and a second winding region 23. Although fig. 1 only shows two winding regions, the present invention is not limited thereto, and the number of winding regions of the magnetic core 20 may be adjusted according to the actual design requirement. The first winding region 21 and the second winding region 23 are located at different positions of the core 20 and are spaced apart from each other. That is, the first winding region 21 and the second winding region 23 do not overlap each other. For example, the core 20 is divided into two regions (hereinafter referred to as an upper half region and a lower half region) according to the central axis CL, the first winding region 21 is located in the upper half region of the core 20, the second winding region 23 is located in the lower half region of the core 20, and two ends of the first winding region 21 and two ends of the second winding region 23 are separated by a gap 25.

In some embodiments, the first winding 30 is located in the first winding region 21 and the second winding 40 is located in the second winding region 23. Due to the separation between the first winding region 21 and the second winding region 23, the stray capacitance between the first winding 30 and the second winding 40 of the first winding region 21 and the second winding region 23 is low, so that the hybrid inductor device 10 has good high-frequency filtering capability and low-frequency filtering capability.

The first winding 30 includes a first coil 31 and a second coil 33. The first coil 31 has a plurality of first coil turns 311, a first start end TA1 extending from the top surface of the magnetic core 20, and a first end TA2 extending from the bottom surface of the magnetic core 20. The first coil turn 311 is wound around the first winding region 21. For example, as shown in fig. 1, the first start end TA1 of the first coil 31 is located at the left end of the first winding region 21, and the first coil 31 is wound toward the right side of the first winding region 21 and is wound to the first end TA2 located at the right end of the first winding region 21 to form the first coil turn 311.

The second coil 33 has a plurality of second coil turns 331, a second start end TB1 extending from the top surface of the core 20, and a second finish end TB2 extending from the bottom surface of the core 20. The second coil turn 331 is wound around the first winding region 21. The winding manner of the second coil turn 331 is the same as that of the first coil turn 311, and is not described herein for brevity. The first coil turn 311 and the second coil turn 331 have the same winding direction in the first winding region 21. For example, as shown in fig. 1, the first coil 31 and the second coil 33 start from the first start terminal TA1 and the second start terminal TB1, and wind from the top surface of the core 20 to the bottom surface of the core 20, and then wind from the bottom surface of the core 20 to the top surface of the core 20, and wind along the left end of the first winding region 21 to the right end of the first winding region 21 (i.e., from left to right), and end at the first end terminal TA2 and the second end terminal TB 2. Here, the first start end TA1 is adjacent to the second start end TB1, and the first end TA2 is adjacent to the second end TB 2. For example, the first start terminal TA1 and the second start terminal TB1 are both located at the left end of the first winding region 21, and the first end terminal TA2 and the second end terminal TB2 are both located at the right end of the first winding region 21.

Each first coil turn 311 is parallel to each second coil turn 331. In some embodiments, the first coil turn 311 and the second coil turn 331 are spaced apart from each other. For example, as shown in fig. 1, from the left end to the right end of the first winding region 21 (i.e., from left to right), the arrangement order of the first coil turn 311 and the second coil turn 331 is "first coil turn 311, second coil turn 331, first coil turn 311, second coil turn 331 …, and the like".

Fig. 2 is a schematic diagram of a hybrid inductor device 10 according to some embodiments of the present disclosure, and fig. 3 is a schematic cross-sectional diagram of a partial structure 35 according to some embodiments of the present disclosure. As shown in fig. 2 and 3, in some embodiments, the first coil turn 311 overlaps the second coil turn 331. For example, the first coil 31 and the second coil 33 can be integrated together and implemented by a single multi-core twisted wire, and the first coil turn 311 can be overlapped on the second coil turn 331 or overlapped under the second coil turn 331. For example, as shown in fig. 3, the partial structure 35 has a first coil turn 311 and a second coil turn 331, and as can be seen from fig. 3, the first coil turn 311 overlaps the second coil turn 331. In some embodiments, since the first coil 31 and the second coil 33 can be integrated together and implemented by a single multi-core twisted wire, the first start end TA1 overlaps the second start end TB1, the first end TA2 overlaps the second end TB2 (for example, the first start end TA1 can overlap the second start end TB1 or overlap the second start end TB1, and the first end TA2 can overlap the second end TB2 or overlap the second end TB 2).

Reference is again made to fig. 1. Similarly, the second winding 40 includes a third coil 41 and a fourth coil 43. The third coil 41 has a plurality of third coil turns 411, a third start end TC1 extending from the top surface of the magnetic core 20, and a third end TC2 extending from the bottom surface of the magnetic core 20. The fourth coil 43 has a plurality of fourth coil turns 431, a fourth start end TD1 extending from the top surface of the magnetic core 20, and a fourth end TD2 extending from the bottom surface of the magnetic core 20. Third coil turn 411 and fourth coil turn 431 are wound around second winding area 23. The third start end TC1 is adjacent to the fourth start end TD1 (e.g., the third start end TC1 and the fourth start end TD1 are both located at the right end of the second winding region 23), the third end TC2 is adjacent to the fourth end TD2 (e.g., the third end TC2 and the fourth end TD2 are both located at the left end of the second winding region 23), and the third winding turn 411 and the fourth winding turn 431 have the same winding direction. For example, the winding directions of the third winding turn 411 and the fourth winding turn 431 may start from the third start end TC1 and the fourth start end TD1, and wind from the top surface of the magnetic core 20 to the bottom surface of the magnetic core 20, and then wind from the bottom surface of the magnetic core 20 to the top surface of the magnetic core 20, along the right end of the second winding region 23 to the left end of the second winding region 23 (i.e., from right to left), and end at the third end TC2 and the fourth end TD 2.

The first start end TA1 and the second start end TB1 are adjacent to the third end TC2 and the fourth end TD2, and the first end TA2 and the second end TB2 are adjacent to the third start end TC1 and the fourth start end TD 1. For example, the left end of the first winding region 21 is adjacent to the left end of the second winding region 23 (specifically, the left end of the first winding region 21 is separated from the left end of the second winding region 23 by a gap 25), the right end of the first winding region 21 is adjacent to the right end of the second winding region 23 (specifically, the right end of the first winding region 21 is separated from the right end of the second winding region 23 by a gap 25), and since the first start end TA1 and the second start end TB1 are located at the left end of the first winding region 21 and the third end TC2 and the fourth end TD2 are located at the left end of the second winding region 23, the first start end TA1 and the second start end TB1 are adjacent to the third end TC2 and the fourth end TD 2. Similarly, since the first termination end TA2 and the second termination end TB2 are located at the right end of the first winding region 21, and the third start end TC1 and the fourth start end TD1 are located at the right end of the second winding region 23, the first termination end TA2 and the second termination end TB2 are adjacent to the third start end TC1 and the fourth start end TD 1. In some embodiments, as shown in fig. 1, the first start end TA1, the second start end TB1, the third start end TC1 and the fourth start end TD1 are located on the same axis (hereinafter referred to as the first axis L1), the first end TA2, the second end TB2, the third end TC2 and the fourth end TD2 are located on the same axis (hereinafter referred to as the second axis L2), and the first axis L1 and the second axis L2 are perpendicular to each other.

It should be noted that, as shown in fig. 1, each third coil turn 411 is respectively parallel to each fourth coil turn 431, similarly to the first coil turn 311 and the second coil turn 331. Likewise, in some embodiments, third coil turn 411 and fourth coil turn 431 are spaced apart from one another, e.g., from the right end of second winding area 23 to the left end thereof (i.e., from right to left), as shown in fig. 1, similar to first coil turn 311 and second coil turn 331, and third coil turn 411 and fourth coil turn 431 are arranged in the order "fourth coil turn 431, third coil turn 411, fourth coil turn 431, third coil turn 411 …, etc. Likewise, in some embodiments, third coil turn 411 overlaps fourth coil turn 431, similar to first coil turn 311 and second coil turn 331, as shown in fig. 2. Similarly, in some embodiments, as shown in fig. 2, similarly to the first start end TA1, the second start end TB1, the first end TA2 and the second end TB2, the third start end TC1 overlaps the fourth start end TD1, and the third end TC2 overlaps the fourth end TD 2.

In some embodiments, as shown in fig. 1, the first coil turn 311 and the second coil turn 331 are wound around the first winding region 21 along the first direction D1. Third and fourth coil turns 411, 431 are wound around second winding region 23 along second direction D2. The first direction D1 and the second direction D2 are opposite to each other. For example, the first direction D1 is a direction from the left end of the first winding region 21 to the right end of the first winding region 21 (i.e., from left to right), and the second direction D2 is a direction from the right end of the second winding region 23 to the left end of the second winding region 23 (i.e., from right to left).

In some embodiments, the first coil turn 311 and the second coil turn 331 in the first winding 30 may have the same number of turns. For example, the number of turns of the first coil turn 311 and the second coil turn 331 is four, but the present invention is not limited thereto, and the number of turns can be adjusted according to actual requirements. In some embodiments, the third and fourth coil turns 411, 431 in the second winding 40 may have the same number of turns. For example, the number of turns of the third coil turn 411 and the fourth coil turn 431 is four, but the present invention is not limited thereto, and the number of turns can be adjusted according to actual requirements. In some embodiments, since the first winding 30 and the second winding 40 may be substantially symmetrical, the first coil turn 311, the second coil turn 331 and the third coil turn 411, the fourth coil turn 431 have the same number of turns. Thereby enhancing the performance of the hybrid inductor device 10 in suppressing noise (e.g., common mode noise or differential mode noise) or current limiting.

In some embodiments, the magnetic core 20 may be implemented by a closed magnetic core or a non-closed magnetic core. In some embodiments, where core 20 is implemented as a closed core, the closed core may be a circular core, an elliptical core, a rectangular core, an EE-type core, or other shaped closed core.

The start terminal (i.e., the first start terminal TA1 to the fourth start terminal TD1) and the end terminal (i.e., the first end terminal TA2 to the fourth end terminal TD2) are coils (i.e., the first coil 31, the second coil 33, the third coil 41, and the fourth coil 43) for coupling to external circuit elements or elements of electrical signals. For example, the first start end TA1 and the first end TA2 are terminals of the first coil 31 connected to the outside; the second start terminal TB1 and the second end terminal TB2 are terminals of the second coil 33 connected to the outside; the third start terminal TC1 and the third end terminal TC2 are terminals of the third coil 41 connected to the outside; the fourth start terminal TD1 and the fourth end terminal TD2 are terminals of the fourth coil 43 connected to the outside. Therefore, after the coil is coupled to the corresponding circuit element or the electrical signal through the start terminal and the end terminal, the hybrid inductor device 10 can be applied to various circuit structures. Here, the beginning and ending points, which are expressed as the beginning and ending of the winding of the coil, do not limit the direction in which the current passes.

Refer to fig. 1 and 4. Fig. 4 is an equivalent circuit diagram of the hybrid inductive device 10 according to some embodiments of the present disclosure. In some embodiments, the first coil 31 and the third coil 41 form a common mode inductance when a current flows to the first start end TA1 of the first coil 31 and the third start end TC1 of the third coil 41 through the first end TA2 of the first coil 31 and the third end TC2 of the third coil 41, respectively.

Refer to fig. 1, 4 and 5. Fig. 5 is a circuit for applying common mode signal rejection of the hybrid inductive device 10 according to some embodiments of the present disclosure. For example, the first termination TA2 is coupled to a positive power signal V + of the positive terminal 201 of the power supply 200, the third termination TC2 is coupled to a negative power signal V-of the negative terminal 203 of the power supply 200, the first start TA1 is coupled to an input terminal (hereinafter referred to as the first input terminal 301) of an external circuit to be filtered (hereinafter referred to as the external circuit 300), and the third start TC1 is coupled to another input terminal (hereinafter referred to as the second input terminal 303) of the external circuit 300. When the external circuit 300 is coupled to the ground reference signal GND (e.g., the housing of the external circuit 300 is grounded), stray signals (e.g., common mode noise) are generated between the positive power signal V + and the negative power signal V-of the power supply 200 and the ground reference signal GND due to the stray capacitance C between the external circuit 300 and the ground reference signal GND coupled thereto.

Therefore, when the common mode noise occurs, the current (e.g. the common mode current, i.e. the current direction a1 (indicated by one-dot chain line in fig. 5) of the stray current generated by the positive terminal 201 of the power supply 200 through the stray capacitor C) is the same as the current direction a2 (indicated by two-dot chain line in fig. 5) of the stray current generated by the negative terminal 203 of the power supply 200 through the stray capacitor C), flows to the first start terminal TA1 of the first coil 31 through the first end terminal TA2 and returns to the power supply 200 through the ground reference signal GND of the external circuit 300, and flows to the third start terminal TC1 of the third coil 41 through the third end terminal TC2 and returns to the power supply 200 through the ground reference signal GND of the external circuit 300, so that the first coil 31 and the third coil 41 generate magnetic fields in the same direction, thereby enhancing the inductance of the first coil 31 and the third coil 41, and enhancing the reactance (in other words, the first coil 31 and the third coil 41 form a common mode inductor) at this time, so as to achieve the effect of filtering noise.

Similarly, in some embodiments, the second coil 33 and the fourth coil 43 form a common mode inductor when a current flows to the second termination terminal TB2 of the second coil 33 and the fourth termination terminal TD2 of the fourth coil 43 through the second start terminal TB1 of the second coil 33 and the fourth start terminal TD1 of the fourth coil 43, respectively. Here, since the second coil 33 and the fourth coil 43 form a common mode inductor in the same manner as the first coil 31 and the third coil 41, the description thereof is omitted for the sake of brevity.

In some embodiments, when the current flows to the first start end TA1 of the first coil 31 and the fourth start end TD1 of the fourth coil 43 through the first end TA2 of the first coil 31 and the fourth end TD2 of the fourth coil 43, respectively, the first coil 31 and the fourth coil 43 generate the same magnetic field direction through the current to form a differential mode inductor.

Refer to fig. 1, 4 and 6. Fig. 6 shows a differential mode signal suppression application circuit of the hybrid inductive device 10 according to some embodiments of the present disclosure. For example, the first end terminal TA2 is coupled to the positive power signal V + of the positive terminal 201 of the power source 200, the fourth start terminal TD1 is coupled to the negative power signal V-of the negative terminal 203 of the power source 200, the first start terminal TA1 is coupled to the first input terminal 301 of the external circuit 300, and the fourth end terminal TD2 is coupled to the second input terminal 303 of the external circuit 300. Noise is generated between the power line signals (i.e. the positive power signal V + and the negative power signal V-), and the noise (i.e. the differential mode noise) is generally coupled in series with the power line. When the differential mode noise occurs, a current (e.g., a differential mode current, i.e., a current direction a4 (indicated by a chain line in fig. 6) of the noise current as the differential mode current is the same as a current direction A3 (indicated by a chain line in fig. 6) of the power current) flows through the external circuit 300 via the first termination terminal TA2 to the first start terminal TA1 of the first coil 31, and flows from the external circuit 300 to the fourth start terminal TD1 of the fourth coil 43 via the fourth termination terminal TD2, so that the first coil 31 and the fourth coil 43 generate magnetic fields in the same direction (i.e., generate the same magnetic field direction), thereby enhancing the inductance of the first coil 31 and the fourth coil 43, i.e., enhancing the inductance of the differential mode current (i.e., the first coil 31 and the fourth coil 43 form differential mode inductance) at this time, and achieving the filtering effect.

Similarly, in some embodiments, when the current flows to the second start terminal TB1 of the second coil 33 and the third start terminal TC1 of the third coil 41 through the second end terminal TB2 of the second coil 33 and the third end terminal TC2 of the third coil 41 respectively, the second coil 33 and the third coil 41 generate the same magnetic field direction through the current to form the differential mode inductance. Here, since the second coil 33 and the third coil 41 form a differential mode inductance in the same manner as the first coil 31 and the fourth coil 43, the description thereof is omitted for the sake of brevity.

In some embodiments, the first start terminal TA1 and the second start terminal TB1 are coupled to each other, and the first coil 31 and the second coil 33 form an noninductive resistance when a current flows to the second end terminal TB2 through the first end terminal TA 2.

Refer to fig. 1, 4 and 7. Fig. 7 shows a non-inductive-resistance application circuit of the hybrid inductive device 10 according to some embodiments of the present disclosure. For example, the first termination TA2 is coupled to the positive power signal V + of the positive terminal 201 of the power source 200, and the second termination TB2 is coupled to the first input terminal 301 of the external circuit 300. When the external circuit 300 is to limit the current and reduce the weak frequency response (e.g., increase the load), the first start terminal TA1 is coupled to the second start terminal TB1 (i.e., the first start terminal TA1 is short-circuited with the second start terminal TB 1), and the current flows to the external circuit 300 after flowing through the first coil 31 and the second coil 33 via the first end terminal TA 2. Since the first coil 31 and the second coil 33 generate magnetic fields in opposite directions, the magnetic fields cancel each other without generating inductive reactance, in other words, the first coil 31 and the second coil 33 have no resistance of inductive reactance (for example, only have a resistance value of the coil) or only have inductance generated by small leakage inductance, that is, the first coil 31 and the second coil 33 form a substantially non-inductive resistance, so as to be applied to functions (for example, current limiting, frequency response for reducing fading, etc.) required by the external circuit 300.

Similarly, in some embodiments, the third start terminal TC1 and the fourth start terminal TD1 are coupled to each other, and the third coil 41 and the fourth coil 43 form an noninductive resistance when a current flows to the fourth end terminal TD2 via the third end terminal TC 2. Here, since the third coil 41 and the fourth coil 43 form the non-inductive resistor in the same manner as the first coil 31 and the second coil 33, the description thereof is omitted for brevity.

In some embodiments, the current may be a direct current or an alternating current. In other words, the hybrid inductor device 10 can be used in a dc system or an ac system. In some embodiments, the hybrid inductive device 10 may be adapted for use in a pi-type filter or a T-type filter.

As can be seen from the above, the hybrid inductor device 10 has a simple coil winding structure, and thus can be implemented by automatically winding through a winding machine, thereby improving the production efficiency of the product and reducing the mutual interference between the coil windings.

Claims

1. A hybrid inductor apparatus, comprising:

a magnetic core defining a first winding region and a second winding region, the first winding region and the second winding region being located at different positions of the magnetic core and being separated from each other;

a first winding, comprising:

a first coil having a plurality of first coil turns, a first start end extending from the top surface of the core and a first finish end extending from the bottom surface of the core, the plurality of first coil turns being wound around the first winding region; and

a second coil having a plurality of second coil turns, a second start end extending from the top surface of the magnetic core, and a second end extending from the bottom surface of the magnetic core, the plurality of second coil turns being wound in the first winding region, wherein the plurality of first coil turns and the plurality of second coil turns have a same winding direction in the first winding region, the plurality of first coil turns are respectively parallel to the plurality of second coil turns, the first start end is adjacent to the second start end, and the first end is adjacent to the second end; and

a second winding, comprising:

a third coil having a plurality of third coil turns, a third start end extending from the top surface of the magnetic core, and a third end extending from the bottom surface of the magnetic core, the plurality of third coil turns being wound around the second winding region; and

a fourth coil having a plurality of fourth coil turns, a fourth start end extending from the top surface of the magnetic core, and a fourth end extending from the bottom surface of the magnetic core, wherein the plurality of fourth coil turns are wound around the second winding region, wherein the plurality of third coil turns and the plurality of fourth coil turns have the same winding direction in the second winding region, the plurality of third coil turns are respectively parallel to the plurality of fourth coil turns, the third start end is adjacent to the fourth start end, the third end is adjacent to the fourth end, wherein the first start end and the second start end are adjacent to the third end and the fourth end, and the first end and the second end are adjacent to the third start end and the fourth start end.

2. The hybrid inductive device of claim 1, wherein the first and second plurality of coil turns are spaced apart from one another, and wherein the third and fourth plurality of coil turns are spaced apart from one another.

3. The hybrid inductive device of claim 1, wherein the first plurality of coil turns overlaps the second plurality of coil turns and the third plurality of coil turns overlaps the fourth plurality of coil turns.

4. The hybrid inductive device of claim 1, wherein the first coil turns and the second coil turns are wound around the first winding region along a first direction, and the third coil turns and the fourth coil turns are wound around the second winding region along a second direction, wherein the first direction and the second direction are opposite to each other.

5. The hybrid inductive device of claim 1, wherein a common mode inductance is formed by the first coil and the third coil when a current flows to the first start end of the first coil and the third start end of the third coil through the first end of the first coil and the third end of the third coil, respectively.

6. The hybrid inductive device of claim 1, wherein the second winding and the fourth winding form a common mode inductor when a current flows to the second ending terminal of the second winding and the fourth ending terminal of the fourth winding through the second starting terminal of the second winding and the fourth starting terminal of the fourth winding, respectively.

7. The hybrid inductive device of claim 1, wherein when a current flows to the first beginning of the first coil and the fourth beginning of the fourth coil through the first ending of the first coil and the fourth ending of the fourth coil, respectively, the first coil and the fourth coil generate a same magnetic field direction through the current to form a differential mode inductor.

8. The hybrid inductive device of claim 1, wherein when a current flows to the second start end of the second coil and the third start end of the third coil through the second end of the second coil and the third end of the third coil, respectively, the second coil and the third coil generate a same magnetic field direction through the current to form a differential mode inductor.

9. The hybrid inductive device of claim 1, wherein the first start terminal and the second start terminal are coupled to each other, and the first winding and the second winding form an inductionless resistor when a current flows from the first end terminal to the second end terminal.

10. The hybrid inductive device of claim 1, wherein the third start terminal and the fourth start terminal are coupled to each other, and the third coil and the fourth coil form a non-inductive resistor when a current flows from the third end terminal to the fourth end terminal.