发明授权
- 专利标题: Method of generating an index signal with reduced parts
- 专利标题(中): 缩小部分生成索引信号的方法
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申请号: US10856195申请日: 2004-05-28
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公开(公告)号: US07112956B2公开(公告)日: 2006-09-26
- 发明人: Akira Shibata , Yoshihito Otomo
- 申请人: Akira Shibata , Yoshihito Otomo
- 申请人地址: JP Tokyo
- 专利权人: Mitsumi Electric Co., Ltd.
- 当前专利权人: Mitsumi Electric Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Frishauf, Holtz, Goodman & Chick, P.C.
- 优先权: JP2003-156384 20030602
- 主分类号: G01B7/30
- IPC分类号: G01B7/30
摘要:
In an index signal generator for generating an index signal for use in a direct-drive motor having a rotation axis and comprising a stator and a rotor, a particular at least one of M magnetized elements is used as an index detection magnet having magnetic force which is different from those in remaining ones of the M magnetized elements. Wound around one of a specific one of particular three cores in the stator, an index detection coil detects variations of the magnetic force generated by the ring-shaped permanent magnet to produce a detected signal. On the basis of the detected signal, the index signal is generated.
公开/授权文献
- US20040245957A1 Method of generating an index signal with reduced parts 公开/授权日:2004-12-09