发明授权
- 专利标题: Multilayer inductor and power converter comprising it
- 专利标题(中): 多层电感和功率转换器组成
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申请号: US12810351申请日: 2008-12-25
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公开(公告)号: US08436708B2公开(公告)日: 2013-05-07
- 发明人: Takeshi Tachibana , Satoru Tanaka
- 申请人: Takeshi Tachibana , Satoru Tanaka
- 申请人地址: JP Tokyo
- 专利权人: Hitachi Metals, Ltd.
- 当前专利权人: Hitachi Metals, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2007-332358 20071225
- 国际申请: PCT/JP2008/073621 WO 20081225
- 国际公布: WO2009/081984 WO 20090702
- 主分类号: H01F5/00
- IPC分类号: H01F5/00 ; H01F27/28
摘要:
A multilayer inductor comprising a coil embedded in a magnetic portion, and a magnetic gap formed by a non-magnetic portion in part of a magnetic path, the magnetic portion being made of Ni ferrite, whose relative temperature coefficient αμir of initial permeability at a frequency of 1 MHz is more than +10 ppm/° C. and +40 ppm/° C. or less between −40° C. and +80° C., the non-magnetic portion being made of Zn ferrite containing more Zn than in the magnetic portion and having a Curie temperature Tc of −50° C. or lower, and the Zn content changing continuously in boundary regions between the non-magnetic portion and the magnetic portion, whereby the thickness of the magnetic gap changes with the temperature.
公开/授权文献
- US20100283447A1 MULTILAYER INDUCTOR AND POWER CONVERTER COMPRISING IT 公开/授权日:2010-11-11
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