发明授权
- 专利标题: Permanent magnet type rotating electrical machine and electric power steering device
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申请号: US12741773申请日: 2008-09-26
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公开(公告)号: US08604658B2公开(公告)日: 2013-12-10
- 发明人: Masatsugu Nakano , Kazuhisa Takashima , Satoru Akutsu , Yoshihito Asao
- 申请人: Masatsugu Nakano , Kazuhisa Takashima , Satoru Akutsu , Yoshihito Asao
- 申请人地址: JP Tokyo
- 专利权人: Mitsubishi Electronics Corporation
- 当前专利权人: Mitsubishi Electronics Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2007-296477 20071115
- 国际申请: PCT/JP2008/067470 WO 20080926
- 国际公布: WO2009/063696 WO 20090522
- 主分类号: H02K1/27
- IPC分类号: H02K1/27
摘要:
A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is hi, M unit vectors in total, each being in an angular direction of 2πN(i−1)/M (rad), are defined, and a sum of M vectors obtained by multiplying the unit vectors respectively by the positional shift amount hi is smaller than a maximum value of an absolute value of the positional shift amount hi.
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