Patent ID: 6462451
Filing Date: 2002-10-08
Classification: H02K

Abstract:
A permanent magnet rotating electric machine comprising a stator having concentrated windings wound around teeth formed in a stator core, and a rotor having rare earth permanent magnets inserted into a plurality of permanent magnet holes formed in a rotor core, wherein said permanent magnets are each shaped like an arc convex toward said stator and a flat surface facing toward said rotor is provided at a tip end portion of said teeth of said stator,wherein a width Wm (deg.) of each of said permanent magnets is given by Wm=C1Â·Pr where C1 is a magnet width coefficient and Pr (deg.) is a rotor pole pitch, and wherein the magnet width coefficient is set so that 0.75&lE;C1&lE;0.85.