CN216818059U

CN216818059U - Inductance device

Info

Publication number: CN216818059U
Application number: CN202220507234.5U
Authority: CN
Inventors: 李冠廷; 黄家平; 陈胜有; 刘兴钦
Original assignee: TECH MOUNT CORP
Current assignee: TECH MOUNT CORP
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-06-24
Anticipated expiration: 2032-03-09

Abstract

The utility model relates to an inductive device, comprising: a first inductor coil section; the spacing layer is a sheet body made of nonmagnetic materials and covers the outer surface of the first inductance coil; and a second inductor winding section extending from one end of the first inductor winding section, wherein the second inductor winding section is wound around and covers the outer surface of the spacing layer, so that the spacing layer is arranged between the first inductor winding section and the second inductor winding section, and the spacing distance between the first inductor winding section and the second inductor winding section is not less than the thickness of the spacing layer. Therefore, the inductance device of the utility model can reduce the size of the parasitic capacitance and can improve the self-resonant frequency.

Description

Inductance device

Technical Field

The present invention relates to an inductor, and more particularly, to an inductor.

Background

In the inductor, the frequency at which the parasitic capacitance resonates with the ideal inductance is the self-resonant frequency (SRF). As shown in fig. 6, at this frequencyThe inductor has a very high impedance. Above the self-resonant frequency, the impedance of the inductor will drop. Wherein the relationship between the self-resonant frequency and the parasitic capacitance is

Where C is the magnitude of the parasitic capacitance. If the parasitic capacitance can be reduced, the self-resonant frequency of the inductor can be increased, and the operable frequency range is larger.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to provide an inductor device having a larger operable frequency range.

The technical means adopted by the present invention to solve the problems of the prior art is to provide an inductance device, comprising: a first inductor coil section formed by winding a coil; a spacer layer, which is a sheet of nonmagnetic material, having a spacer layer inner surface and a spacer layer outer surface, the spacer layer inner surface covering the outer surface constituting the first inductor coil section; and a second inductor winding section extending from one end of the first inductor winding section, the second inductor winding section being formed by winding a coil, the second inductor winding section being wound to cover the outer surface of the spacer layer, so that the spacer layer is disposed between the first inductor winding section and the second inductor winding section, and a spacing distance between the first inductor winding section and the second inductor winding section is not less than the thickness of the spacer layer.

In an embodiment of the utility model, the inductor device further includes a wound body, and the first inductor winding section is wound around the wound body.

In an embodiment of the present invention, an inductance device is provided, in which the winding-receiving body is made of a ferromagnetic material.

In an embodiment of the present invention, an inductance device is provided, and the wound body is a circular frame.

In one embodiment of the present invention, an inductance device is provided, in which the wound body has a rod shape.

In an embodiment of the utility model, to provide an inductance device, the inductance device further includes an inner spacer layer made of a non-magnetic material, covering the wound body and wound by the first inductance coil section and disposed between the wound body and the first inductance coil section, so that an inner spacing distance between the wound body and the first inductance coil section is at least greater than a thickness of the inner spacer layer.

In an embodiment of the utility model, an inductance device is provided, in which a winding end of the first inductance coil section to a winding end of the first inductance coil section is a first winding direction, a winding end of the second inductance coil section to a winding end of the second inductance coil section is a second winding direction, and the first winding direction and the second winding direction are opposite.

In an embodiment of the utility model, to provide an inductance device, further includes a third inductance coil section, and another spacer layer covers the second inductance coil section and is wound by the third inductance coil section and disposed between the second inductance coil section and the third inductance coil section.

In an embodiment of the present invention, an inductance device is provided, and the spacer layer is an adhesive tape.

In an embodiment of the utility model, there is provided an inductance device, wherein the spacer layer is made of a plastic material.

Through the technical means adopted by the inductance device, the spacing layer is arranged between the first inductance coil section and the second inductance coil section, so that the spacing distance between the first inductance coil section and the second inductance coil section is not less than the thickness of the spacing layer. Because the spacing distance between the first inductance coil section and the second inductance coil section is larger than that of the inductor without a spacing layer in the prior art, the inductance device of the utility model has smaller parasitic capacitance, improves the self-resonant frequency of the inductor and further has a larger operable frequency range.

Drawings

Fig. 1 is a cross-sectional view of an inductance device according to a first embodiment of the utility model.

Fig. 2 is a simplified schematic diagram of an inductive device according to a second embodiment of the present invention.

Fig. 3 is a cross-sectional view of an inductance device according to a third embodiment of the utility model.

Fig. 4 is a cross-sectional view of an inductance device according to a fourth embodiment of the utility model.

Fig. 5 is a simplified schematic diagram of an inductance device according to a fifth embodiment of the present invention.

Fig. 6 is a graph showing the impedance of the inductor versus frequency.

Reference numerals

100 inductance device

100a inductance device

100b inductive device

100c inductor device

100d inductance device

1 first inductor segment

2 spacing layer

3 second inductor segment

4 wound body

41 magnetic core

42 wire frame

5 inner spacer layer

6 third inductor segment

d1 first winding direction

d2 second winding direction

d3 third winding direction

Detailed Description

Embodiments of the present invention will be described below with reference to fig. 1 to 5. The description is not intended to limit the embodiments of the present invention, but is one example of the present invention.

As shown in fig. 1, an inductance device 100 according to a first embodiment of the utility model includes: a first inductor segment 1, a spacer layer 2, a second inductor segment 3 and a wound body 4. The inductance device 100 may be a common-mode choke (CMC), a power factor correction (PMC) inductor, an SMD type inductor, or another type of inductor.

The first inductor winding section 1 is formed by winding a coil and is wound around the periphery of the winding object 4.

The spacer layer 2 is a sheet of a non-magnetic material (non-magnetic material). The spacer layer 2 is made of a soft material, such as plastic or Nomex.

The spacing layer 2 may be an adhesive tape such as a dam tape (margin tape), a transparent adhesive tape, or the like, an adhesive layer, a plastic sheet.

The spacer layer 2 has a spacer layer inner surface 21 and a spacer layer outer surface 22. The inner surface 21 of the spacer layer covers the outer surface of the first inductor winding section 1.

The second inductor winding section 3 extends from one end of the first inductor winding section 1. The second inductor winding section 3 is formed by winding a coil. The second inductor segment 3 is wound to cover the outer surface 22 of the spacer layer, so that the spacer layer 2 is disposed between the first inductor segment 1 and the second inductor segment 3. By the arrangement of the spacer layer 2, the spacing distance between the first inductor winding section 1 and the second inductor winding section 3 is not less than the thickness of the spacer layer 2. The thickness of the spacer layer 2 may be changed by being pressed by the first inductor winding section 1 and the second inductor winding section 3.

The first inductor winding section 1 and the second inductor winding section 3 may be round wire, flat wire, multi-stranded wire, silk-covered wire or other conducting wire commonly used in the inductor in the prior art.

The winding direction from the winding end of the first inductor segment 1 to the winding end of the first inductor segment is d1, and the winding direction from the winding end of the second inductor segment 3 to the winding end of the second inductor segment is d 2. In the present embodiment, the first winding direction d1 is opposite to the second winding direction d 2. In other embodiments, the first winding direction d1 and the second winding direction d2 may not be opposite to each other.

In the case where the thickness of the spacer layer 2 is larger, the parasitic capacitance of the inductance device 100 is smaller, so that the self-resonant frequency is higher. The thickness of the spacer layer 2 is determined in consideration of the requirements of the self-resonant frequency, the space occupation and the inductance.

As shown in fig. 1, according to an inductance device 100 of the first embodiment of the present invention, a wound body 4 is wound by a first inductance coil section. Wherein the wound body 4 may be a magnetic core 41 of a ferromagnetic material, so that the inductance device 100 becomes a ferromagnetic core inductance. The wound body 4 may also be a non-magnetic material, making the inductive device an air-core inductor (air-core inductor). Or no winding 4 is provided, making the inductive device another air-core inductor.

In the present embodiment, the wound body 4 has a rod shape. In other embodiments, the wound body 4 may be a circular, square, oval, or other frame.

As shown in fig. 2, an inductive device 100a according to a second embodiment of the present invention has a structure substantially the same as that of the inductive device 100 of the first embodiment, and the main differences are: the wound body 4 is a circular frame body.

As shown in fig. 3, an inductance device 100b according to a third embodiment of the present invention has a structure substantially the same as that of the inductance device 100 of the first embodiment, and the main differences are: the wound body 4 further includes a bobbin 42. The bobbin 42 covers the outer surface of the magnetic core 41. The first inductor winding section 1 is wound on a bobbin 42.

As shown in fig. 4, an inductive device 100c according to a fourth embodiment of the utility model has substantially the same structure as the inductive device 100b of the third embodiment, and the main differences are: the inductor device 100c further includes an inner spacer layer 5 and a third inductor segment 6, and another spacer layer 2 covers the second inductor segment 3 and is wound by the third inductor segment 6 and disposed between the second inductor segment 3 and the third inductor segment 6. The winding direction from the starting end of the third inductor winding section 6 to the ending end of the first inductor winding section is a third winding direction d 3. In the present embodiment, the third winding direction d3 is opposite to the second winding direction d 2. In this embodiment, the inner spacer 5 is a sheet of nonmagnetic material and covers the winding body 4. In other embodiments, the inner spacer layer 5 may be a coating of a non-magnetic material applied to the surface of the wound body 4. The inner spacer layer 5 is wound by the first inductor segment 1 and disposed between the wound body 4 and the first inductor segment, such that the inner spacing distance between the wound body 4 and the first inductor segment 1 is at least greater than the thickness of the inner spacer layer 5. The materials of the spacer layer 2 and the inner spacer layer 5 may be the same or different. The thickness of the inner spacer layer 5 may be varied by being pressed by the wound body 4 and the first inductor winding section 1.

As shown in fig. 5, an inductance device 100d according to a fifth embodiment of the present invention has substantially the same structure as the inductance device 100a of the second embodiment, and the main differences are: the number of coil segments and spacer layers 2 differs depending on the winding of the coil.

While the foregoing description and description are directed to the preferred embodiment of the present invention, other and further modifications may be devised by those skilled in the art based on the teachings herein.

In this specification, the utility model has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the utility model. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. An inductive device, comprising:

the first inductance coil section is formed by winding a coil;

the spacing layer is a sheet body made of nonmagnetic materials and provided with a spacing layer inner surface and a spacing layer outer surface, and the spacing layer inner surface covers the outer surface of the first inductance coil section; and

the second inductance coil section extends from one end of the first inductance coil section, the second inductance coil section is formed by winding a coil, the second inductance coil section is formed by winding and covering the outer surface of the spacing layer, so that the spacing layer is arranged between the first inductance coil section and the second inductance coil section, and the spacing distance between the first inductance coil section and the second inductance coil section is not less than the thickness of the spacing layer.

2. The inductive device of claim 1, further comprising a wound body, wherein said first inductor winding section is wound around said wound body.

3. The inductive device of claim 2, wherein the winding is made of ferromagnetic material.

4. The inductive device of claim 2, wherein the wound body is a circular frame.

5. The inductive device of claim 2, wherein said wound body is rod-shaped.

6. The inductive device of claim 2, further comprising an inner spacer layer of non-magnetic material covering said wound body and wound by said first inductor winding segment and disposed between said wound body and said first inductor winding segment such that an inner spacing distance between said wound body and said first inductor winding segment is at least greater than a thickness of said inner spacer layer.

7. The inductive device of claim 1, wherein a winding direction from a winding end of the first inductor winding section to a winding end of the first inductor winding section is a first winding direction, a winding direction from a winding end of the second inductor winding section to a winding end of the second inductor winding section is a second winding direction, and the first winding direction is opposite to the second winding direction.

8. The inductive device of claim 1, further comprising a third inductor segment, wherein a further spacer layer covers and is wound by said third inductor segment and is disposed between said second inductor segment and said third inductor segment.

9. The inductive device of claim 1, wherein said spacer layer is a tape.

10. The inductive device of claim 1, wherein said spacer layer is a plastic material.