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Common mode choke coil

A common mode choke coil and coil conductor technology, which is applied in the direction of transformer/inductor coil/winding/connection, inductor, printed inductor, etc., can solve the problem of different coupling degrees between wires, etc.

Active Publication Date: 2018-01-09
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the degree of coupling between the wires is different

Method used

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  • Common mode choke coil
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  • Common mode choke coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] refer to Figure 1 ~ Figure 3C The drawings of the drawings illustrate the common mode choke coil according to Embodiment 1.

[0038] figure 1 A schematic exploded perspective view showing the common mode choke coil according to Embodiment 1. The common mode choke coil according to Embodiment 1 has an insulating member 10 composed of a plurality of insulating layers 11, a plurality of, for example, three inductors 20 arranged inside the insulating member 10, and each of the plurality of inductors 20 A plurality of external electrodes 30 are respectively connected to both ends of one inductor 20 . The insulating layer 11 is formed by, for example, firing a green sheet or glass paste containing ferrite powder.

[0039] A plurality of coil conductor layers 21 stacked in the first direction (lamination direction) are arranged inside the insulating member 10 . For example, the coil conductor layers 21 are arranged on the interfaces of the two insulating layers 11 adjacen...

Embodiment 2

[0058] refer to Figure 4A ~ Figure 4C The drawings of the drawings illustrate the common mode choke coil according to the second embodiment. Hereinafter, differences from Embodiment 1 will be described, and descriptions of common structures will be omitted. In Example 1, the coil conductor 22 included in the coil conductor layer 21 has a planar shape along the circumference, but in Example 2, the coil conductor 22 has a planar shape along the outer periphery of an equilateral triangle.

[0059] Figure 4A , Figure 4B , Figure 4C The plan views of the coil conductor layers 21 of the first layer, the second layer, and the third layer of the common mode choke coil according to the second embodiment are respectively shown. In any layer, the coil conductor 22 has a shape along the outer periphery of a regular triangle. The coil conductor 22 is curved at a position corresponding to the vertices of the equilateral triangle. The pattern constituted by the three coil conductor...

Embodiment 3

[0063] refer to Figure 5A ~ Figure 5C The drawing of the drawing explains the common mode choke coil according to the third embodiment. Hereinafter, differences from Embodiment 1 will be described, and descriptions of common structures will be omitted. In Embodiment 1, the common mode choke coil includes three inductors 20 , but in Embodiment 3, four inductors 20 are included.

[0064] Figure 5A , Figure 5B , Figure 5C The plan views of the coil conductor layers 21 of the first layer, the second layer, and the third layer of the common mode choke coil according to the third embodiment are respectively shown. Each of the coil conductor layers 21 includes four coil conductors 22 . Represent the coil conductor 22 of the first inductor 20 with the thick solid line, represent the coil conductor 22 of the second inductor 20 with the thick dashed line, represent the coil conductor 22 of the 3rd inductor 20 with the thin solid line, represent the coil conductor 22 of the 3rd ...

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PUM

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Abstract

The invention provides a common mode choke coil which can reduce difference of normal mode impedance among lines. Three or more of n inductors are arranged inside an insulating member. Inside the insulating member, each of the inductors includes coil conductors that are contained in respective coil conductor layers that are stacked in a first direction and via conductors, each of which connects the coil conductors that are contained in the coil conductor layers adjoining in the first direction. Each of the coil conductor layers contains the n coil conductors of the inductors, and a pattern formed of the coil conductors contained in each of the coil conductor layers has n-fold rotational symmetry.

Description

technical field [0001] The present invention relates to common mode choke coils. Background technique [0002] Patent Documents 1 and 2 below disclose a common mode choke coil including three wire-wound coils. [0003] In the common mode choke coil disclosed in Patent Document 1, three electric wires are arranged and wound on the signal input electrode side, and three electric wires are separately wound on the signal output electrode side. [0004] In the common mode choke coil disclosed in Patent Document 2, the first and second wires are wound on the first layer of the winding core, and the third wire is wound along the first layer wound on the first layer. Wrap around the recess between the first wire and the second wire. According to this configuration, the distance between the centers of two electric wires selected from the three electric wires is equal in any combination. [0005] Patent Document 1: Japanese Unexamined Patent Publication No. 2002-246244 [0006] Pa...

Claims

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Application Information

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IPC IPC(8): H01F17/00H01F27/28H01F27/32H01F27/29
CPCH01F17/0013H01F2017/004H01F2017/0073H01F2017/0093H01F27/06H01F27/28H01F27/324H01F27/42H01F2027/2809
Inventor 孝山康太今西由浩石渡祐池本喜代美
Owner MURATA MFG CO LTD
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