Patent ID: 8217547
Filing Date: 2012-07-10
Classification: H02K

Abstract:
1. A rotating electric machine comprising: a stator having an annularly-shaped stator core and a multiphase coil attached to the stator core and including a plurality of phase coils supplied with alternating currents of different phases respectively; and a rotor inserted in said stator and having a plurality of magnetic poles, said stator core including a yoke extending in a circumferential direction of said stator core, a plurality of stator teeth formed on a peripheral surface of the yoke and spaced from each other in the circumferential direction, and a plurality of slots defined between said stator teeth, said phase coils being inserted in said slots, said stator teeth including an inter-homo-phase tooth laterally sandwiched between two said slots in which said phase coils of the same phase are inserted respectively, and an inter-hetero-phase tooth laterally sandwiched between two said slots in which said phase coils of different phases are inserted respectively, and a magnetic flux path length between said rotor and said inter-hetero-phase tooth where a magnetic flux from said magnetic pole proceeds from said rotor and starts to enter said inter-hetero-phase tooth being longer than a magnetic flux path length between said rotor and said inter-homo-phase tooth where said magnetic flux proceeds from said rotor and starts to enter said inter-homo-phase tooth, wherein: