Noise filter and noise reduction unit

Patent metadata

Field	Value
Publication number	US-2018374635-A1
Application number	US-201816017318-A
Country	US
Kind code	A1
Filing date	Jun 25, 2018
Priority date	Jun 27, 2017
Publication date	Dec 27, 2018
Grant date	—

Abstract

A noise filter ( 10 ) is equipped with plural conductors ( 20 ) having respective winding portions ( 21 ) and a ring-shaped core which is inserted through the winding portions of the plural conductors and made of a magnetic material. The ring-shaped core has a core main body ( 40 ) having a pair of extension portions ( 41 ) and ( 42 ) that are connected to each other at one end and a link core ( 50 ) which is attached to the core main body at the other end and thereby connects the extension portions and. At least one of the extension portions and of the core main body is straight. The plural conductors are arranged in a row in a state that the straight extension portion is inserted through the winding portions of the plural conductors.

First claim

1 . A noise filter comprising:
a plurality of conductors each having a winding portion; and a ring-shaped core inserted made from a magnetic material and being inserted through the winding portions, that the ring-shaped core including: a core main body having a pair of extension portions connected to each other at one end; and a link core attached to the core main body at the other end to connect the extension portions, at least one of the extension portions of the core main body having a straight shape, and the plurality of conductors being arranged in a row to allow the extension portion having the straight shape to be inserted through the winding portion of each of the plurality of conductors.

2 . The noise filter according to claim 1 , wherein
the link core includes: a fitting plate portion fitted between respective end portions of the extension portions of the core main body; and a positioning plate portion contacting the extension portions when the fitting plate portion is fitted between the end portions of the extension portions.

3 . The noise filter according to claim 1 , wherein
the link core includes a fitting plate portion fitted between respective end portions of the extension portions of the core main body.

4 . The noise filter according to claim 1 , wherein
the link core is fixed to the core main body at the other end by using a magnetic adhesive member.

5 . A noise reduction unit comprising:
the noise filter according to claim 1 ; a housing holding the noise filter; and an electric wire of a wire harness introduced into the housing and electrically connected to at least one of the plurality of conductors of the noise filter.

Assignees

• Yazaki Corp
• Toyota Motor Co Ltd

Inventors

• Iizuka Hayato
• Kayo Kazuma
• Aihara Hiroshi

Classifications

• H01F17/06

  with core substantially closed in itself, e.g. toroid · CPC title

• H01B7/0045

  Cable-harnesses · CPC title

• H01F2017/065

  Core mounted around conductor to absorb noise, e.g. EMI filter · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F17/04 Primary

  with magnetic core · CPC title