CN216818059U - Inductance device - Google Patents

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

Inductive device

technical field

The utility model relates to an inductor, in particular to an inductor device.

Background technique

其中C为寄生电容的大小。如能降低寄生电容的大小，将能提高电感器的自谐振频率，而具有较大的可运作频率范围。In an inductor, the frequency at which the parasitic capacitance resonates with the ideal inductance is the self-resonant frequency (SRF). As shown in Figure 6, at this frequency, the inductor has a very high impedance. In the case of higher than the self-resonant frequency, the impedance of the inductor will drop instead. Among them, the relationship between the self-resonant frequency and the parasitic capacitance is

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

Utility model content

Therefore, the purpose of the present invention is to provide an inductive device with a larger operating 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 inductance coil section, the first inductance coil section is formed by winding a coil; a spacer layer is A sheet of non-magnetic material, the spacer layer has an inner surface of the spacer layer and an outer surface of the spacer layer, the inner surface of the spacer layer covers the outer surface of the first inductor coil segment; and the second inductor coil segment, from One end of the first inductor coil segment extends, the second inductor coil segment is wound with a coil, and the second inductor coil segment is wound to cover the outer surface of the spacer layer, so that the spacer layer is It is arranged between the first inductor coil segment and the second inductor coil segment, and the spacing distance between the first inductor coil segment and the second inductor coil segment is not less than the thickness of the spacing layer.

In an embodiment of the present invention, an inductance device is provided, further comprising a winding body, and the first inductor coil segment is wound around the winding body.

In an embodiment of the present invention, to provide an inductance device, the receiving body is a ferromagnetic material.

In an embodiment of the present invention, to provide an inductor device, the winding body is a circular frame body.

In an embodiment of the present invention, to provide an inductor device, the winding body is rod-shaped.

In an embodiment of the present invention, in order to provide an inductance device, it further includes an inner spacer layer, which is a non-magnetic material, which covers the winding body and is wound by the first inductor coil section and is disposed on the winding body and Between the first inductor coil segments, the inner spacing distance between the wound body and the first inductor coil segment is at least greater than the thickness of the inner spacing layer.

In an embodiment of the present invention, to provide an inductance device, the starting end of the first inductance coil section to the end end of the first inductance coil section is a first winding direction, and the second inductance coil section is in a first winding direction. The starting end of the segment to the ending end of the second inductor coil segment is the second winding direction, and the first winding direction is opposite to the second winding direction.

In an embodiment of the present invention, in order to provide an inductance device, it further includes a third inductive coil section, and another spacer layer covers the second inductive coil section and is wound by the third inductive coil section and disposed on the between the second inductor coil segment and the third inductor coil segment.

In an embodiment of the present invention, to provide an inductor device, the spacer layer is an adhesive tape.

In an embodiment of the present invention, to provide an inductor device, the spacer layer is made of plastic material.

Through the technical means adopted by the inductance device of the present invention, a spacer layer is provided between the first inductance coil section and the second inductance coil section, so that the first inductance coil section and the second inductance coil section are The spacing distance between the segments is not less than the thickness of the spacing layer. Since the distance between the first inductor coil segment and the second inductor coil segment is larger than that of the prior art inductor without a spacer layer, the inductor device of the present invention has smaller parasitic capacitance and improves the inductance The self-resonant frequency of the device has a large operating frequency range.

Description of drawings

FIG. 1 is a cross-sectional view of an inductor device according to a first embodiment of the present invention.

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

3 is a cross-sectional view of an inductor device according to a third embodiment of the present invention.

4 is a cross-sectional view of an inductor device according to a fourth embodiment of the present invention.

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

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

reference number

100 Inductive Devices

100a Inductive Device

100b Inductive Device

100c Inductive Device

100d Inductive Device

1 First inductor coil section

2 spacer layers

3 Second inductor coil section

4 Receiver

41 core

42 wire stand

5 inner spacer

6 Third inductor coil section

d1 first winding direction

d2 Second winding direction

d3 The third winding direction

Detailed ways

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

As shown in FIG. 1 , the inductor device 100 according to the first embodiment of the present invention includes a first inductor coil segment 1 , a spacer layer 2 , a second inductor coil segment 3 and a winding body 4 . The inductance device 100 may be a common-mode choke (CMC), a choke such as a power factor correction (PMC) inductor, an SMD inductor, or other types of inductors.

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

The spacer layer 2 is a sheet of non-magnetic material. The spacer layer 2 is a soft material, and can be a polymer material such as plastic and Nomex.

The spacer layer 2 may be an adhesive tape such as margin tape, scotch tape, etc., 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 constituting the first inductor coil section 1 .

The second inductive coil section 3 extends from one end of the first inductive coil section 1 . The second inductor coil section 3 is formed by winding a coil. The second inductor coil 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 coil segment 1 and the second inductor coil segment 3 . Through the arrangement of the spacer layer 2 , the spaced distance between the first inductor coil section 1 and the second inductor coil section 3 is not less than the thickness of the spacer layer 2 . The thickness of the spacer layer 2 can be changed by being squeezed by the first inductor coil section 1 and the second inductor coil section 3 .

The first inductor coil section 1 and the second inductor coil section 3 may be round wires, flat wires, multi-strand wires, silk-covered wires or other wires commonly used in inductors in the prior art.

The first winding direction d1 is from the winding end of the first inductance coil section 1 to the end of the first inductance coil section, and the winding direction of the second inductance coil section 3 to the end of the second inductance coil section is The second winding direction d2. In this embodiment, the first winding direction d1 is opposite to the second winding direction d2. In other embodiments, as the winding method changes, the first winding direction d1 and the second winding direction d2 may not be opposite.

In the case where the thickness of the spacer layer 2 is larger, the parasitic capacitance of the inductive device 100 is smaller, so that the self-resonant frequency is higher. The thickness of the spacer layer 2 is determined by considering the requirement of the self-resonant frequency, the occupation of space and the size of the inductance.

As shown in FIG. 1 , according to the inductor device 100 according to the first embodiment of the present invention, the winding body 4 is wound by the first inductor coil section. The receiving body 4 may be a magnetic core 41 of ferromagnetic material, so that the inductor device 100 becomes a ferromagnetic core inductor. The receiving body 4 can also be a non-magnetic material, so that the inductor device becomes an air-core inductor. Alternatively, the winding body 4 is not provided, so that the inductor device becomes another air-core inductor.

In this embodiment, the wound body 4 is rod-shaped. In other embodiments, the wound body 4 may be a frame body such as a circle, a square, or an ellipse.

As shown in FIG. 2 , the structure of the inductor device 100 a according to the second embodiment of the present invention is substantially the same as that of the inductor device 100 of the first embodiment, and the main difference is that the receiving body 4 is a circular frame.

As shown in FIG. 3 , the structure of the inductor device 100 b according to the third embodiment of the present invention is substantially the same as that of the inductor device 100 of the first embodiment, and the main difference is that the receiving body 4 further includes a bobbin 42 . The bobbin 42 covers the outer surface of the magnetic core 41 . The first inductor coil section 1 is wound on the wire frame 42 .

As shown in FIG. 4 , the structure of the inductor device 100 c according to the fourth embodiment of the present invention is substantially the same as that of the inductor device 100 b of the third embodiment. The main difference is that the inductor device 100 c further includes an inner spacer layer 5 and a third Inductance coil section 6 , and another spacer layer 2 covers the second inductive coil section 3 and is wound by the third inductive coil section 6 to be disposed between the second inductive coil section 3 and the third inductive coil section 6 . The third winding direction d3 is the starting end of the third inductor coil segment 6 to the ending end of the first inductor coil segment. In this embodiment, the third winding direction d3 is opposite to the second winding direction d2. In this embodiment, the inner spacer layer 5 is a sheet of non-magnetic material, covering the wound body 4 . In other embodiments, the inner spacer layer 5 may be a coating of a non-magnetic material, which is coated on the surface of the wound body 4 . The inner spacer layer 5 is wound 1 by the first inductive coil section and is disposed between the winding body 4 and the first inductive coil section, so that the inner separation distance between the winding body 4 and the first inductive coil section 1 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 can be changed by being squeezed by the wound body 4 and the first inductor coil section 1 .

As shown in FIG. 5 , the structure of the inductor device 100 d according to the fifth embodiment of the present invention is substantially the same as that of the inductor device 100 a of the second embodiment. The number of layers 2 is different.

The above description and description are only the description of the preferred embodiments of the present invention. Those skilled in the art can make other modifications according to the above-defined protection scope and the above description, but these modifications should still be the present invention. The creative spirit of the new model is within the protection scope of the present invention.

In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and changes can still be made without departing from the spirit and scope of the present invention. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.

Claims (10)

1. an inductive device, is characterized in that, comprises: a first inductor coil segment, the first inductor coil segment is formed by winding a coil; The spacer layer is a sheet of non-magnetic material, the spacer layer has an inner surface of the spacer layer and an outer surface of the spacer layer, and the inner surface of the spacer layer covers the outer surface of the first inductor coil section ;as well as The second inductor coil segment extends from one end of the first inductor coil segment, the second inductor coil segment is formed by winding a coil, and the second inductor coil segment is wound Covering the outer surface of the spacer layer, so that the spacer layer is arranged between the first inductor coil section and the second inductor coil section, and the first inductor coil section And the spacing distance between the second inductor coil segments is not less than the thickness of the spacing layer. 2 . The inductor device according to claim 1 , further comprising a winding body, and the first inductor coil segment is wound around the winding body. 3 . 3 . The inductor device according to claim 2 , wherein the wound body is a ferromagnetic material. 4 . 4 . The inductor device according to claim 2 , wherein the wound body is a circular frame. 5 . 5 . The inductor device according to claim 2 , wherein the winding body is rod-shaped. 6 . 6 . The inductance device according to claim 2 , further comprising an inner spacer layer, which is a non-magnetic material, which covers the winding body and is wound by the first inductance coil section to be disposed on the receiving body. 7 . between the winding body and the first inductor coil section, and the inner space between the winding body and the first inductor coil section is at least greater than the inner spacer layer thickness of. 7 . The inductance device according to claim 1 , wherein the starting end of the first inductive coil section to the end of the first inductive coil section is the first winding direction, and the The starting end of the second inductor coil segment to the end end of the second inductor coil segment is the second winding direction, and the first winding direction is opposite to the second winding direction. 8 . The inductive device according to claim 1 , further comprising a third inductive coil section, and another spacer layer covers the second inductive coil section and is supported by the third inductive coil section. 9 . It is wound and disposed between the second inductive coil section and the third inductive coil section. 9 . The inductor device according to claim 1 , wherein the spacer layer is an adhesive tape. 10 . 10. The inductor device according to claim 1, wherein the spacer layer is made of plastic material.

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