发明申请
- 专利标题： BRUSHLESS MOTOR AND RECORDING DISK DRIVING APPARATUS HAVING THE BRUSHLESS MOTOR
- 专利标题（中）： 无刷马达无刷电机和录音盘驱动装置
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申请号： US11162095申请日： 2005-08-29
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公开(公告)号： US20060238057A1公开(公告)日： 2006-10-26
- 发明人: Takehito Tamaoka , Hiroaki Hirano , Masayoshi Saichi , Junichi Takatera
- 申请人： Takehito Tamaoka , Hiroaki Hirano , Masayoshi Saichi , Junichi Takatera
- 申请人地址： JP Kyoto
- 专利权人： NIDEC CORPORATION
- 当前专利权人： NIDEC CORPORATION
- 当前专利权人地址： JP Kyoto
- 优先权： JPJP-2005-123905 20050421; JPJP-2005-135623 20050509
- 主分类号： H02K21/12
- IPC分类号： H02K21/12 ; H02K1/00 ; H02K1/27
摘要：
A brushless motor as an example of the invention has a stationary assembly 2 having a first housing member 10 made of a ferromagnetic material and a stator 20 held in the first housing member 10, and a rotor 6 having a rotor magnet 70 facing the stator 20. A annular shield plate 80 held by the rotor 6 is disposed between the rotor magnet 70 and the first housing member 10 and, further, an outer circumferential face 80a of the shield plate 80 is disposed between a magnetically neutral area 46 in the radial direction in the lower end of the rotor magnet 70 and the outer circumferential face of the rotor magnet 70.