Invention Grant
- Patent Title: Composite magnetic core and magnetic element
-
Application No.: US14417095Application Date: 2013-07-24
-
Publication No.: US09620270B2Publication Date: 2017-04-11
- Inventor: Ikuo Uemoto , Shinji Miyazaki , Takuji Harano
- Applicant: NTN CORPORATION
- Applicant Address: JP Osaka
- Assignee: NTN CORPORATION
- Current Assignee: NTN CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Hedman & Costigan, P.C.
- Agent James V. Costigan; Kathleen A. Costigan
- Priority: JP2012-164748 20120725
- International Application: PCT/JP2013/069998 WO 20130724
- International Announcement: WO2014/017512 WO 20140130
- Main IPC: H01F27/24
- IPC: H01F27/24 ; H01F7/06 ; H01F3/08 ; H01F27/255 ; H01F3/10 ; H01F17/04 ; H01F41/00 ; H01F41/02

Abstract:
The present invention provides a composite magnetic core, containing magnetic powders poor in its moldability, which can be configured arbitrarily and has a magnetic characteristic excellent in direct current superimposition characteristics and a magnetic element composed of the composite magnetic core and a coil wound around the circumference thereof. A compressed magnetic body (2) obtained by compression-molding magnetic powders is combined with an injection-molded magnetic body (3) obtained by mixing a binding resin with magnetic powders having surfaces thereof electrically insulated and by injection-molding a mixture of the magnetic powders and the binding resin. The compressed magnetic body (2) is press-fitted into the injection-molded magnetic body (3) or bonded thereto at a combining portion thereof to obtain the combined body. The combined body is composed of the injection-molded magnetic body (3) constituting a housing in which the compressed magnetic body (2) is disposed.
Public/Granted literature
- US20150179323A1 COMPOSITE MAGNETIC CORE AND MAGNETIC ELEMENT Public/Granted day:2015-06-25
Information query