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Common mode choke

A common mode choke coil and wire technology, which is applied in the field of improvement of winding methods, can solve the problems of inability to obtain characteristics, inability to reduce mode conversion characteristics, etc., and achieve the effect of balancing inductance components

Pending Publication Date: 2022-04-08
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be seen that the common mode choke coil having the structure described in Patent Document 1 cannot obtain good characteristics in the low-frequency region around 1 MHz, and more specifically, cannot reduce the mode conversion characteristics.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0040] figure 1 The appearance of the common mode choke coil 1 according to the first embodiment of the present invention is shown.

[0041] The common mode choke coil 1 is provided with the magnetic core 2, the 1st lead wire 3, and the 2nd lead wire 4 which respectively comprise an inductor. exist figure 1 In , the first lead wire 3 and the second lead wire 4 are omitted from illustration. The magnetic core 2 includes a magnetic material, and more specifically, is made of Ni—Zn-based ferrite as a magnetic body, resin containing a magnetic material, or the like. The magnetic core 2 is formed as a whole in a quadrangular shape in cross section.

[0042] The magnetic core 2 has a winding core portion 7 and a first flange portion 11 and a second flange portion 12. The winding core portion 7 has a peripheral surface 5 and extends along an axis direction 6 parallel to the peripheral surface 5. The first flange The flange portion 11 and the second flange portion 12 are respectiv...

no. 2 approach

[0098] The second embodiment differs from the first embodiment in that a switching part C for switching the positional relationship of the respective turns of the first conductive wire 3 and the second conductive wire 4 in the double-layer winding area A in the axial direction 6 Is a.

[0099] Figure 8 ~ Figure 10 It is a figure for demonstrating the common mode choke coil 1a of 2nd Embodiment of this invention, Figure 8 and figure 2 correspond, Figure 9 and Figure 4 correspond, Figure 10 and Figure 5 correspond. exist Figure 8 ~ Figure 10 in, right with Figure 2 to Figure 5 Components corresponding to the shown components are denoted by the same reference numerals, and overlapping explanations are omitted.

[0100] In the second embodiment, as Figure 8 As shown, the first conductive wire 3 and the second conductive wire 4 wind around the peripheral surface 5 of the core part 7, from the first end part 9 on the first flange part 11 side to the second end pa...

no. 3 approach

[0124] Figure 11 is a diagram for explaining a common mode choke coil 1b according to a third embodiment of the present invention, and figure 2 or Figure 8 correspond. exist Figure 11 in, right with figure 2 or Figure 8 Components corresponding to the shown components are denoted by the same reference numerals, and overlapping explanations are omitted.

[0125] In the second embodiment, in the switching part C, gaps are provided between the respective turns of the conducting wires 3 and 4 before and after the intersection of the first conducting wire 3 and the second conducting wire 4, but in the third embodiment, there are In the switch part C, no gap is provided between the respective turns of the conducting wires 3 and 4 before and after the intersection of the first conducting wire 3 and the second conducting wire 4 . Other points in the third embodiment are the same as those in the second embodiment.

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Abstract

The invention provides a common mode choke capable of reducing mode conversion characteristics in a low frequency region around 1 MHz. The winding core part is provided with a double-layer winding region and a non-contact winding region, the double-layer winding region comprises a first layer formed by winding a first lead wire on the peripheral surface of the winding core part and a second layer formed by winding a second lead wire on the outer side of the first layer, and the non-contact winding region is formed by winding the lead wires in a non-contact state. The non-contact winding area is located between the first flange portion and the double-layer winding area, the double-layer winding area is provided with a switching portion, and the intersection portion of the first lead wire and the second lead wire is the intersection portion of the first lead wire and the second lead wire. And a switching means for switching the positional relationship in the axial direction of the respective turns of the first wire and the second wire in the double-layer winding region. In the non-contact winding region, a wire length of the first wire is longer than a wire length of the second wire. Through the two regions, the coil length of the first wire is longer than the coil length of the second wire.

Description

technical field [0001] The present invention relates to a common mode choke coil, and particularly relates to an improvement in a winding method of a wire in a winding type common mode choke coil having a structure in which two wires are wound around a winding core part of a magnetic core. Background technique [0002] The winding-type common mode choke coil includes: a magnetic core having a winding core portion, and having a first flange portion and a second flange portion provided at opposite ends in the axial direction of the winding core portion; The terminal electrode and the third terminal electrode are arranged on the first flange portion; the second terminal electrode and the fourth terminal electrode are arranged on the second flange portion; the first conductive wire is wound around the core portion and connected to the first terminal The electrodes are connected to the second terminal electrodes; and the second lead wire is wound around the winding core in the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/30H01F27/28
CPCH01F27/2823H01F2017/0093H01F17/045H01F27/292H01F27/006H01F41/069H01F17/04H01F27/29
Inventor 林井研竹泽香织桥本良太
Owner MURATA MFG CO LTD
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