发明授权
US08371021B2 Manufacturing method of rare earth-iron ring magnet with continuous orientation controlled anisotropy
有权
具有连续取向控制各向异性的稀土 - 铁环磁铁的制造方法
- 专利标题： Manufacturing method of rare earth-iron ring magnet with continuous orientation controlled anisotropy
- 专利标题（中）： 具有连续取向控制各向异性的稀土 - 铁环磁铁的制造方法
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申请号： US12680869申请日： 2009-05-20
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公开(公告)号： US08371021B2公开(公告)日： 2013-02-12
- 发明人: Fumitoshi Yamashita , Kiyomi Kawamura , Yukihiro Okada , Hiroshi Murakami
- 申请人： Fumitoshi Yamashita , Kiyomi Kawamura , Yukihiro Okada , Hiroshi Murakami
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Brinks Hofer Gilson & Lione
- 优先权： JP2008-135146 20080523
- 国际申请： PCT/JP2009/002214 WO 20090520
- 国际公布： WO2009/142005 WO 20091126
- 主分类号： H01F7/06
- IPC分类号： H01F7/06 ; B22D27/02
摘要：
A process of manufacturing segments, an anisotropic direction of which is continuously changed in a plane vertically by a uniform magnetic field maintained in a constant direction and a process of arranging a plurality of segments on a circumference, extruding the segments in a ring shape by rheology based on the viscous deformation of the segments, from one thrust-direction end surface of the segments, and subsequently compressing the segments from both thrust-direction end surfaces of the segments are necessarily included. A ring magnet, anisotropy of which is controlled in a continuous direction, is provided, and a source for generating a static magnetic field has energy density (BH) max≧160 to 180 kJ/m3.