JPS59147317U

JPS59147317U - noise filter

Info

Publication number: JPS59147317U
Application number: JP4256983U
Authority: JP
Inventors: 浩二西田
Original assignee: ティーディーケイ株式会社
Priority date: 1983-03-23
Filing date: 1983-03-23
Publication date: 1984-10-02
Also published as: JPS646589Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来実施していたノイズフィルタを示す概略斜
視図、第２図は第１図における回路例、第３図は本考案
のノイズフィルタの一実施例を示す概略斜視図、第４図
は本考案のノイズフィルタの回路例、第５図は本考案の
ノイズフィルタによる高周波減衰量特性を示すグラフで
ある。２１．３１・・・磁心、２１ａ、３１ａ・・・巻き始め
部、２１ｂ、３１ｂ・・・中間部、２１Ｃ，３１Ｃ・・
・巻き終り部、２２．３２・・・コイル、２２Ａ、３２
Ａ・・・疎部分、２２Ｂ、３２Ｂ・・・密部分、２３・
・・第１コモンモートチ′ヨークコイル、３３・・・第
２コモンモートチヨークコイル、４４・・・コンデンサ
。ｌ１パ昌Ｍ、“、／−Ｘい ”−１ｊｉｌ。FIG. 1 is a schematic perspective view showing a conventional noise filter, FIG. 2 is an example of the circuit in FIG. 1, FIG. 3 is a schematic perspective view showing an embodiment of the noise filter of the present invention, and FIG. 4 5 is a circuit example of the noise filter of the present invention, and FIG. 5 is a graph showing high frequency attenuation characteristics by the noise filter of the present invention. 21.31...Magnetic core, 21a, 31a... Winding start part, 21b, 31b... Intermediate part, 21C, 31C...
・End of winding, 22.32...Coil, 22A, 32
A...Sparse part, 22B, 32B...Dense part, 23.
...First common moat yoke coil, 33...Second common mote yoke coil, 44...Capacitor. l1pasho M, ",/-Xii"-1jil.

Claims

[Scope of utility model registration request]

A first common mode chip is formed by forming a sparse portion and a dense portion in the winding layer of the coil by winding the coil from the winding start part to the winding end part of a ring-shaped magnetic core, and then folding it back and winding it to the middle part. In a noise filter in which one end of each coil wire of a yoke coil and a second common mode yoke coil formed by winding a coil around a ring-shaped magnetic core in the same manner as described above is connected, and a capacitor is interposed, the first common A noise filter characterized in that the coil winding layer on the side facing the connection point between the mode chioke coil and the second common mode chiyoke coil is a sparse portion.