发明授权
- 专利标题： Electromagnetic actuator
- 专利标题（中）： 电磁执行器
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申请号： US10569778申请日： 2004-08-27
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公开(公告)号： US07358629B2公开(公告)日： 2008-04-15
- 发明人: Masami Yamamoto , Akihiro Ito , Masato Tanaka , Shinji Morinaga , Tetsuya Iwamoto
- 申请人： Masami Yamamoto , Akihiro Ito , Masato Tanaka , Shinji Morinaga , Tetsuya Iwamoto
- 申请人地址： JP Chiba
- 专利权人： Seiko Precision Inc.
- 当前专利权人： Seiko Precision Inc.
- 当前专利权人地址： JP Chiba
- 代理机构： Honigman Miller Schwartz & Cohn LLP
- 优先权： JP2003-306240 20030829
- 国际申请： PCT/JP2004/012410 WO 20040827
- 国际公布： WO2005/022730 WO 20050310
- 主分类号： H02K37/14
- IPC分类号： H02K37/14 ; H02K1/00
摘要：
The rotational torque of an electromagnetic actuator having a stator and rotor, such as a stepping motor, is increased.The electromagnetic actuator includes a rotor (30) having multiple magnetic poles (Nr1, Nr2, Nr3, Nr4, Nr5, Sr1, Sr2, Sr3, Sr4, Sr5) on a circumferential surface (31) and a plurality of stators (10, 20) in an electromagnet form. The stator (10, 20) has a pair of magnetic poles (13, 14, 23, 24) facing the circumferential surface (31) of the rotor (30), and an auxiliary yoke (40, 50) made of a soft magnetic material member extending in a circumferential direction (A) over an angular range (γ1, γ2) larger than a spread angle (α) of the magnetic poles (Nr, Sr) of the rotor (30) in the circumferential direction (A) is provided between the pair of magnetic poles (13, 14, 23, 24).
公开/授权文献
- US20070018513A1 Electromagnetic actuator 公开/授权日：2007-01-25