Invention Grant
- Patent Title: Permanent magnet type rotating electrical machine and electric power steering device
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Application No.: US12741773Application Date: 2008-09-26
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Publication No.: US08604658B2Publication Date: 2013-12-10
- Inventor: Masatsugu Nakano , Kazuhisa Takashima , Satoru Akutsu , Yoshihito Asao
- Applicant: Masatsugu Nakano , Kazuhisa Takashima , Satoru Akutsu , Yoshihito Asao
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electronics Corporation
- Current Assignee: Mitsubishi Electronics Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2007-296477 20071115
- International Application: PCT/JP2008/067470 WO 20080926
- International Announcement: WO2009/063696 WO 20090522
- Main IPC: H02K1/27
- IPC: H02K1/27

Abstract:
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.
Public/Granted literature
- US08648513B2 Permanent magnet type rotating electrical machine and electric power steering device Public/Granted day:2014-02-11
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