| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and improve the efficiency of a permanent magnet rotating electric machine, with reduced cogging torque. SOLUTION: A permanent magnet rotor 2 is provided where pn-pieces of permanent magnet blocks 21 (p is the number of magnetic poles of rotor, n is an integer of 2 or more) are arranged in the circumferential direction on the circumferential surface or near it facing the stator 1. The permanent magnet block 21 meets the followings (a) to (e); (a) (θi )-(θi+1 )=(Ai .p/2), (b) Ai is the angle between the radial center lines of i-th permanent magnet block and i+1-th permanent magnet block in clockwise rotation assumed to be positive (c)θi is the angle between the magnetizing direction of i-th permanent magnet block and outward radial direction, and (d)θi+1 is the angle between the magnetizing direction of i+1-th permanent magnet block and outward radial direction, while the stator 1 comprises m-pieces of salient magnetic poles arrayed with constant separation, and meets the following (f): (f) m/p<=1.5.
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