Patent ID: 6376958
Filing Date: 2002-04-23
Classification: H02K

Abstract:
A permanent magnet synchronous motor comprising a stator in which armature windings are wound in a plurality of slots formed in a stator core, and a rotor composed of a shaft having an outer periphery and made of a conductive magnetic material, an intermediate sleeve having an outer periphery, made of the same material as that of the shaft and laid around the outer periphery of the shaft, a laminated electromagnetic steel sheet having a high tensile strength, laid around the outer periphery of the intermediate sleeve and having an outer periphery, a conductive permanent magnet having an outer periphery and laid around the outer periphery of the laminated electromagnetic steel sheet, and a reinforce member made of conductive carbon fibers and laid around the outer periphery of the permanent magnet, wherein harmonic magnetic flux detours the laminated electromagnetic steel sheet so as to reduce loss caused by the harmonic magnetic flux in the intermediate sleeve.