发明授权
US07618496B2 Radial anisotropic sintered magnet and its production method, magnet rotor using sintered magnet, and motor using magnet rotor
有权
径向各向异性烧结磁体及其制造方法，使用烧结磁体的磁体转子和使用磁体转子的电动机
- 专利标题： Radial anisotropic sintered magnet and its production method, magnet rotor using sintered magnet, and motor using magnet rotor
- 专利标题（中）： 径向各向异性烧结磁体及其制造方法，使用烧结磁体的磁体转子和使用磁体转子的电动机
-
申请号： US11229660申请日： 2005-09-20
-
公开(公告)号： US07618496B2公开(公告)日： 2009-11-17
- 发明人: Koji Sato , Mitsuo Kawabata , Takehisa Minowa
- 申请人： Koji Sato , Mitsuo Kawabata , Takehisa Minowa
- 申请人地址： JP Tokyo
- 专利权人： Shin-Etsu Chemical Co., Ltd.
- 当前专利权人： Shin-Etsu Chemical Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Birch, Stewart, Kolasch & Birch, LLP
- 优先权： JP2001-334440 20011031; JP2001-334441 20011031; JP2001-334442 20011031; JP2001-334443 20011031
- 主分类号： H01F1/32
- IPC分类号： H01F1/32 ; H01F1/057
摘要：
A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.