发明授权
US07612479B2 Scanner for equalizing torque constant and reducing torque constant variation
有权
用于均衡扭矩恒定和减小转矩恒定变化的扫描仪
- 专利标题： Scanner for equalizing torque constant and reducing torque constant variation
- 专利标题（中）： 用于均衡扭矩恒定和减小转矩恒定变化的扫描仪
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申请号： US11473110申请日： 2006-06-23
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公开(公告)号： US07612479B2公开(公告)日： 2009-11-03
- 发明人: Akira Doi , Haruaki Otsuki , Atsushi Sakamoto , Souichi Toyama , Yaichi Okubo
- 申请人： Akira Doi , Haruaki Otsuki , Atsushi Sakamoto , Souichi Toyama , Yaichi Okubo
- 申请人地址： JP Ebina-shi
- 专利权人： Hitachi Via Mechanics, Ltd.
- 当前专利权人： Hitachi Via Mechanics, Ltd.
- 当前专利权人地址： JP Ebina-shi
- 代理机构： Crowell & Moring LLP
- 优先权： JP2005-184253 20050624
- 主分类号： H02K21/12
- IPC分类号： H02K21/12
摘要：
A scanner has a rotor, and a stator disposed in the outside of the rotor. The rotor includes a shaft, and a permanent magnet mounted on the outer circumferential side of the shaft. The stator includes a casing, a yoke held in the inner circumferential side of the casing, and coils disposed in the inner circumferential side of the yoke. The permanent magnet of the rotor has radially depressed grooves formed in its outer circumferential portion. The torque constant of the scanner is circumferentially equalized by the grooves.
公开/授权文献
- US20070007828A1 Scanner 公开/授权日：2007-01-11
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