发明申请
US20060255677A1 Magnetic member, motor device, magnetizing method and storage device
审中-公开
磁性元件，电机装置，磁化方法及存储装置
- 专利标题： Magnetic member, motor device, magnetizing method and storage device
- 专利标题（中）： 磁性元件，电机装置，磁化方法及存储装置
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申请号： US11406165申请日： 2006-04-18
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公开(公告)号： US20060255677A1公开(公告)日： 2006-11-16
- 发明人: Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
- 申请人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
- 优先权： JP2005-122046 20050420
- 主分类号： H02K21/12
- IPC分类号： H02K21/12
摘要：
Reducing cogging of a small permanent magnet, while maintaining its magnetization characteristics favorable. Denoting the inner diameter of the permanent magnet by D, the pitch per one magnetic pole by P, and the phase number of an alternating current by M, and when D is 20 mm or less and the thickness of the permanent magnet t is set to fulfill the formula (4), then a good permanent magnet with low cogging is obtained. πD/(0.75PM−π)
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