TWI803230B - Inductor - Google Patents

Abstract

Disclosed is an inductor, comprising: a first inductor coil section; a separating layer, which is a sheet of non-magnetic material that covers an outer surface of the first inductor coil section; and a second inductor coil section ,which extends from one end of the first inductor coil section, wherein the second inductance coil section is wound to cover an outer surface of the separating layer so that the separating layer is disposed between the first inductance coil section and the second inductance coil section, and a spacing distance between the first inductor coil segment and the second inductor coil segment is not less than the thickness of the separating layer. By the above-mentioned structure, the inductor of the present invention can reduce the parasitic capacitance, thereby increasing the self-resonant frequency.

Description

Inductive device

The present invention relates to an inductor, in particular to an inductive device.

，其中C為寄生電容的大小。如能降低寄生電容的大小，將能提高電感器的自諧振頻率，而具有較大的可運作頻率範圍。 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 self-resonant frequency and 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 can be increased, and the operating frequency range can be larger.

Therefore, the object 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 inductance coil section; and a second inductance coil area A segment extending from one end of the first inductance coil section, the second inductance coil section is formed by winding a coil, and the second inductance coil section is wound to cover the outer surface of the spacer layer, thereby making the The spacer layer is arranged between the first inductance coil section and the second inductance coil section, and a distance between the first inductance coil section and the second inductance coil section is not less than the spacer layer thickness of.

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

An embodiment of the present invention provides an inductance device, the wound body is made of ferromagnetic material.

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

In an embodiment of the present invention, an inductor device is provided, and the wound body is rod-shaped.

In one embodiment of the present invention, an inductance device is provided, which further includes an inner spacer layer, which is a non-magnetic material, covers the wound body and is wound by the first inductance coil section, and is arranged on the wound body and the wound body. Between the first inductor coil sections, an inner distance between the wound body and the first inductor coil section is at least greater than the thickness of the inner spacer layer.

In an embodiment of the present invention, an inductance device is provided. The winding 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 The first winding direction is opposite to the second winding direction from the starting winding end of the second induction coil section to the ending end of the second induction coil segment.

In an embodiment of the present invention, an inductance device is provided, which 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 to be arranged on the Between the second induction coil section and the third induction coil section.

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

In an embodiment of the present invention, an inductor device is provided, and 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 inductive coil section and the second inductive coil section, thereby making the first inductive coil section and the second inductive coil section The separation distance between segments is not less than the thickness of the spacer layer. Since the distance between the first inductive coil section and the second inductive coil section is larger than the conventional inductor without a spacer layer, the inductive device of the present invention has a smaller parasitic capacitance and improves the self-resonance of the inductor frequency, thereby having a larger operable frequency range.

Embodiments of the present invention will be described below based on FIGS. 1 to 5 . This description is not intended to limit the implementation of the present invention, but is one of the examples of the present invention.

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

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

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

The spacer layer 2 can be adhesive tapes such as margin tape, scotch tape, etc., an adhesive layer, or a plastic sheet.

The spacer layer 2 has a spacer inner surface 21 and a spacer outer surface 22 . The inner surface 21 of the spacer layer covers the outer surface constituting the first inductive coil section 1 .

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

The first inductive coil segment 1 and the second inductive coil segment 3 can be round wires, flat wires, multi-strand wires, silk-covered wires or other wires commonly used in conventional inductors.

The winding end of the first induction coil section 1 to the end end of the first induction coil section is a first winding direction d1, and the winding end of the second induction coil section 3 to the end end of the second induction coil section is a 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.

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

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

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

As shown in FIG. 2 , the structure of the inductance device 100 a according to the second embodiment of the present invention is substantially the same as that of the inductance device 100 of the first embodiment, the main difference being that the wound 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, the main difference is that the wound 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 Figure 4, the structure of the inductance device 100c according to the fourth embodiment of the present invention is roughly the same as that of the inductance device 100b of the third embodiment, the main difference is that the inductance device 100c further includes an inner spacer layer 5 and a The third inductive coil segment 6, and another spacer layer 2 covers the second inductive coil segment 3 and is wound by the third inductive coil segment 6 to be arranged on the second inductive coil segment 3 and the third inductive coil segment 6 between. A third winding direction d3 is formed from the starting end of the third inductor coil segment 6 to the end 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 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 arranged between the wound body 4 and the first inductive coil section, so that an inner space between the wound body 4 and the first inductive coil section 1 The distance 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 can be the same or different. The thickness of the inner spacer layer 5 can be changed due to being pressed by the wound body 4 and the first inductor coil segment 1 .

As shown in Figure 5, according to the inductance device 100d of the fifth embodiment of the present invention, its structure is roughly the same as that of the inductance device 100a of the second embodiment, the main difference is that the winding method of the coil is different so that the coil section and the spacer layer The number of 2 is different.

The above descriptions and descriptions are only descriptions of the preferred embodiments of the present invention. Those who have common knowledge of this technology may make other modifications according to the scope of the patent application defined below and the above descriptions, but these modifications should still be It is for the inventive spirit of the present invention and within the scope of rights of the present invention.

100: inductance device 100a: inductance device 100b: inductive device 100c: inductive device 100d: Inductive device 1: The first inductance coil section 2: spacer layer 3: Second inductor coil section 4: Recipient 41:Magnetic core 42: wire rack 5: inner spacer layer 6: The third inductance coil section d1: the first winding direction d2: the second winding direction d3: the third winding direction

[Fig. 1] is a sectional view showing an inductance device according to a first embodiment of the present invention; [Fig. 2] is a simplified schematic diagram showing an inductance device according to a second embodiment of the present invention; [Fig. 3] is a sectional view showing an inductance device according to a third embodiment of the present invention; [Fig. 4] is a sectional view showing an inductance device according to a fourth embodiment of the present invention; [Fig. 5] is a simplified schematic diagram showing an inductance device according to a fifth embodiment of the present invention; [Figure 6] is a graph showing the relationship between the impedance of an inductor and frequency.

100: inductance device

1: The first inductance coil section

2: spacer layer

3: Second inductor coil section

4: Recipient

41:Magnetic core

d1: the first winding direction

d2: the second winding direction

Claims (10)

An inductive device comprising: A first inductive coil section, the first inductive coil section is wound with a coil; a spacer layer, which 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 constituting the first inductor coil section; and A 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, and the second inductance coil section is wound to cover the spacer layer surface, whereby the spacer layer is disposed between the first induction coil section and the second induction coil section, a space between the first induction coil section and the second induction coil section The distance is not less than the thickness of the spacer layer. The inductance device according to claim 1 further includes a wound body, and the first inductor coil section is wound around the wound body. The inductance device according to claim 2, wherein the wound body is a ferromagnetic material. The inductance device according to claim 2, wherein the wound body is a circular frame. The inductance device according to claim 2, wherein the wound body is rod-shaped. The inductive device according to claim 2 further includes an inner spacer layer, which is a non-magnetic material, covers the wound body and is wound by the first induction coil section, and is arranged on the wound body and the first induction coil section Between, so that an inner spacing distance between the wound body and the first inductor coil section is at least greater than the thickness of the inner spacing layer. The inductive device as claimed in item 1, wherein the winding end of the first induction coil section to the end end of the first induction coil section is a first winding direction, and the winding end of the second induction coil section to the end end of the first induction coil section The end end of the second inductor coil segment is a second winding direction, and the first winding direction is opposite to the second winding direction. The inductance device as in claim 1, further comprising a third inductive coil section, and another spacer layer covers the second inductive coil section and is wound by the third inductive coil section to be arranged in the second inductive coil area segment and the third inductor coil segment. The inductive device according to claim 1, wherein the spacer layer is an adhesive tape. The inductive device according to claim 1, wherein the spacer layer is made of plastic material.

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