| 摘要 |
PROBLEM TO BE SOLVED: To reduce cogging torque in a permanent magnet motor, especially with a skew. SOLUTION: This permanent magnet type motor M includes a laminated electromagnetic steel plate, and a stator K in which winding is wound around a stator core 22 having a plurality of slots 24 and pole teeth 22t and a rotor R having a plurality of permanent magnets 11 polarized so as to be alternately different poles in a circumferential direction, which are disposed so as to face each other through a gap G. In this constitution, a magnet ring portion 25 divided into a plurality of portions so as to have alternately different poles in the circumferential direction is formed at respective circumferential edge portions, which are both edge portions of the stator core 22 along a laminated direction of the electromagnetic steel plate, on the side in which openings of the slots 24 are formed in such a condition as to face the rotor R with the same gap length Lg as the gap G. COPYRIGHT: (C)2006,JPO&NCIPI
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