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Line filter

A filter and line technology, applied in circuits, inductors, fixed inductors, etc., can solve the problem of weakening the noise removal effect, and achieve the effect of high-precision positioning

Inactive Publication Date: 2016-08-24
TOKYO PARTS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the normal mode inductance is lowered, the noise removal effect will be weakened, and conversely, if the normal mode inductance is increased, the magnetic core will easily become magnetically saturated due to the magnetic flux of the normal mode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach example

[0091] exist Figure 1 to Figure 7 Among them, the line filter (power supply filter) 1 of this embodiment has a common mode core 10 , a normal mode core 20 , a first bobbin 30 , a second bobbin 40 , a case 50 , and a stopper mechanism 60 .

[0092] Such as figure 1 or image 3 As shown, the first bobbin 30 and the second bobbin 40 are two independent bobbins made of non-magnetic thermosetting resin. The first bobbin 30 and the second bobbin 40 have: a first cylindrical trunk part 31 and a second cylindrical trunk part 41; the first flange portion 32 and the second flange portion 42 on both sides; the first coil 33 and the second The coil 43; the first terminal block 34 and the second terminal block 44 provided on both sides in the axial direction (Y direction) of the first cylindrical trunk portion 31 and the second cylindrical trunk portion 41; and fixed to the first terminal block 34 and the I-shaped first terminal 36 and second terminal 46 below the second terminal blo...

no. 2 Embodiment approach example

[0121] next pass Figure 8 or Figure 9 The configuration of the line filter according to the second embodiment of the present invention will be described.

[0122] exist Figure 8 or Figure 9 in, right with Figure 1 to Figure 7 The same symbols are given to the same members in , and descriptions of these members are omitted.

[0123] In the first embodiment example, the lower end 23 of the arm portion of the normal mode core is in contact with the outer shape guide portion 54 of the bottomed square cylindrical portion 51, and the normal mode magnetic core 20 is positioned on the bottomed square cylindrical portion 51, but in the second In the embodiment example, the leg portion 24B of the normal mode core abuts against the abutting portion 52 and is positioned.

[0124] That is, in the first embodiment example, in figure 1 In (d), in the state where the common mode magnetic core 10 and the case 50 are integrally fixed, the shape guide portion 54 in the insertion dire...

no. 3 Embodiment approach example

[0137] Next, according to Figure 10 or Figure 11 The configuration of the line filter according to the third embodiment of the present invention will be described.

[0138] exist Figure 10 or Figure 11 in, for with Figure 1 to Figure 9 The same symbols are given to the same members in , and descriptions of these members are omitted.

[0139] The normal mode core 20 of the second embodiment is T-shaped having two arms 21 and one leg 24B, but the normal mode core 27 of the third embodiment is formed in a square shape.

[0140] Such as Figure 11 (a) shown (from Figure 10When viewed from the direction G-G in (a), the length of the normal mode core 27 in the insertion direction is formed to be longer than the length of the common mode core 10 in the insertion direction, and the common mode core 10 is overlapped with the normal mode core 27 in the insertion direction. the central. Additionally, if Figure 11 As shown in (b), the magnetic route between the common mode...

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Abstract

The present invention provides a line filter capable of positioning with high accuracy between terminals without deteriorating reliability. A housing 50 is provided with a first positioning part 56, a second positioning part 57, and a holding part 51 for fixing a normal mode magnetic core 20. Through the first positioning portion 56, a first spool 30 is positioned with respect to the housing 50. Through the second positioning portion 57, a second spool 40 is positioned with respect to the housing 50. The normal mode magnetic core 20 is inserted into the holding part 51 to be fixed and form a closed magnetic circuit with a common-mode magnetic core 10.

Description

technical field [0001] This invention relates to line filters used in various electronic devices. Background technique [0002] For example, in Figure 13 In the common mode choke coil 100 shown in Patent Document 1, when a common-mode (in-phase) noise current flows through the coils 101 , the coils generate magnetic fluxes in the same direction in the magnetic cores 102 . The magnetic flux circulates in the magnetic core 102 and is consumed. On the other hand, by providing the magnetic member 103, the effective magnetic permeability of the magnetic circuit in the normal mode is increased, and the magnetic flux is concentrated on the magnetic circuit (magnetic member and magnetic core member) having a large effective magnetic permeability. Therefore, the normal mode inductance component increases, and a common mode choke coil capable of removing strong normal mode noise is obtained. When manufacturing such a common mode choke coil, there are dimensional deviations between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F27/26H01F17/04
CPCH01F17/041H01F17/045H01F27/24H01F27/266
Inventor 成田敏洋松泽崇
Owner TOKYO PARTS IND CO LTD
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