| 摘要 |
An ac generator includes a stator having a stator core with a plurality of slots and a stator winding disposed in the slots and a rotor having trapezoidal claw-shaped pole pieces that alternately extend in opposite directions to interleave each other. In such an ac generator, each pole piece has a chamfered surface at the tip. The chamfered surface increases a distance from the inside surface of the stator core as the chamfered surface becomes away from the circumferential center of the pole pieces. The chamfered surface has narrower area at the front half in the rotation direction than the rear half.
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