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Magnetically biasing bond magnet for improving DC superposition characteristics of magnetic coil 发明授权

2022-07-31 4900 2574K 0

专利信息

申请日期 2024-11-19 申请号 US09950568
公开(公告)号 US6856231B2 公开(公告)日 2005-02-15
公开国别 US 申请人省市代码 全国
申请人 Teruhiko Fujiwara; Masayoshi Ishii; Haruki Hoshi; Keita Isogai; Hatsuo Matsumoto; Toru Ito; Tamiko Ambo
简介 In order to provide an inductance part having excellent DC superposition characteristic and core-loss, a magnetically biasing magnet, which is disposed in a magnetic gap of a magnetic core, is a bond magnet comprising magnetic powder and plastic resin with the content of the resin being 20% or more on the base of volumetric ratio and which has a specific resistance of 0.1Ω•cm or more. The magnetic powder used is rare-earth magnetic powder having an intrinsic coercive force of 5 kOe or more, Curie point of 300° C. or more, and an average particle size of 2.0-50 μm. A magnetically biasing magnet used in an inductance part that is treated by the reflow soldering method has a resin content of 30% or more and the magnetic powder used therein is Sm—Co magnetic powder having an intrinsic coercive force of 10 kOe or more, Curie point of 500° C. or more, and an average particle size of 2.5-50 μm. A thin magnet having a thickness of 500 μm or less can be realized for a small-sized inductance part.


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