| 摘要 |
A permanent magnet motor includes a stator, and a rotor including a rotor core made by stacking a plurality of steel plates and having a plurality of magnetic insertion holes aligned peripherally and a plurality of permanent magnets of a plurality of magnetic poles serving as field magnets and inserted in the magnetic insertion holes respectively. In the permanent magnet motor, the rotor core includes a plurality of magnetic pole sections further including magnetic pole faces opposing the stator from a radial direction with a gap between the stator and the magnetic pole faces, each magnetic pole section having both peripheral ends and including first to third faces, the first face being formed substantially on a peripherally central part thereof and having a substantially peripherally uniform width of the gap, the first face being formed substantially into a circular arc shape, each of the second and third faces being formed on both peripheral ends thereof respectively and having a width of the gap which is rendered larger as each of the second and third faces comes close to a boundary between the magnetic poles.
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