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Coil device

A technology of coil device and mounting part, applied in the direction of transformer/inductor coil/winding/connection, preventing/reducing unwanted electric/magnetic influence, magnetic core/yoke, etc. Problems such as feature degradation

Pending Publication Date: 2021-11-19
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the coil device described in Patent Document 1, by changing the shape of the core body, the volume of the core body is reduced, and the inductance characteristics may be lowered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0049] Such as Figure 1A As shown, the coil device 10 is, for example, an inductor having a first core 20 a, a second core 20 b, and a conductor 30 . The width of the coil device 10 in the X-axis direction is preferably 3.0-20.0 mm, the width in the Y-axis direction is preferably 3.0-20.0 mm, and the width in the Z-axis direction is preferably 3.0-20.0 mm.

[0050] Such as figure 2 As shown, the first core 20a and the second core 20b each have the same shape and are constituted by a so-called E-shape. The 1st core 20a and the 2nd core 20b are arrange|positioned so that it may oppose to a Y-axis direction, and are bonded using an adhesive agent etc.. The first core 20a and the second core 20b are made of magnetic materials, for example, by making a magnetic material with high magnetic permeability such as Ni-Zn-based ferrite, Mn-Zn-based ferrite, or metallic magnetic materials. The magnetic powder is formed and sintered.

[0051]The first core 20a has a first base portion ...

no. 2 approach

[0101] The coil device 110 of the second embodiment of the present invention differs from the above-mentioned first embodiment only in the following points, and other configurations are the same as those of the above-mentioned first embodiment, and exhibit the same effects. In the drawings, members common to those of the first embodiment are denoted by common symbols, and descriptions of overlapping parts are omitted.

[0102] Such as Figure 5A As shown, the coil arrangement 110 has a first core 120 a , a second core 120 b , and a conductor 130 . The coil device 110 has a structure in which the conductor 130 is sandwiched between the first core 120a and the second core 120b in the vertical direction. Such as Figure 6 As shown, the first core 120a has a pair of first outer leg portions 122a, 122a, and a first groove portion 124a.

[0103] A pair of 1st outer leg part 122a, 122a each has a substantially rectangular parallelepiped shape, and is arrange|positioned at predeter...

no. 3 approach

[0122] The coil device 210 of the third embodiment of the present invention differs from the above-mentioned second embodiment only in the following points, and the other structures are the same as those of the second embodiment, and exhibit the same effects. In the drawings, the same reference numerals are attached to members common to those of the second embodiment, and descriptions of overlapping parts are omitted.

[0123] Such as Figure 7A As shown, the coil arrangement 210 has a first core 220a, a second core 220b, and a conductor 230 . From will Figure 8 and Figure 6 The comparison clearly shows that the second core 220b is different from the second core 120b in the second embodiment in that the thickness in the Z-axis direction becomes thinner.

[0124] Such as Figure 8 As shown, the first core 220a has a pair of first outer foot portions 222a, 222a, a first middle foot portion 223a, and a pair of first groove portions 224a, 224a. The pair of first outer leg por...

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PUM

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Abstract

The invention provides a coil device capable of preventing generation of AC loss and having good inductance characteristics. The coil device (10) is provided with: a first core (20a) having first outer leg parts (22a, 22a); a second core (20b) disposed so as to form gaps (G1, G2) between the second core (20b) and the first outer leg parts (22a, 22a); and a conductor (30), at least a portion of which is disposed between the first core (20a) and the second core (20b), the conductor (30) having outer cutout portions (36, 37) formed at positions corresponding to the gaps (G1, G2).

Description

technical field [0001] The invention relates to a coil arrangement for use as, for example, an inductor or the like. Background technique [0002] As a coil device used as an inductor or the like, for example, a coil device described in Patent Document 1 is known. The coil device described in Patent Document 1 includes a first core member, a core body disposed with a gap between the first core member, and a conductor attached to the core body so as to face the gap. In the coil device described in Patent Document 1, the conductor is arranged at a position away from the gap by changing the shape of the core body at the mounting position of the conductor. As a result, leakage magnetic flux generated in the gap is less likely to contact the surface of the conductor, so eddy current is less likely to be generated on the surface of the conductor, and the occurrence of AC loss due to the eddy current can be prevented. [0003] However, in the coil device described in Patent Docum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/34
CPCH01F27/34H01F2027/348H01F17/043H01F3/14H01F27/341H01F27/2847H01F27/28H01F27/245H01F17/04
Inventor 王晨杉本聪
Owner TDK CORPARATION