Patent ID: 6680557
Filing Date: 2004-01-20
Classification: H02K

Abstract:
A rotary electric machine, comprising:a stator having an annular stator core which is wound with multi-phase windings; and a rotor disposed radially inside the stator core to generate magnetic fields, wherein the rotor has a rotor shaft, a pair of rotor cores, each rotor core having a cylindrical boss, wherein the cylindrical boss is press-fit around the rotor shaft, a disc portion extending from an outer periphery of the cylindrical boss in a radial direction, a cylindrical part disposed in an axial direction connecting with the disc portion radially outside the cylindrical boss, the cylindrical part having a wall continuing in a circumferential direction, and a magnetic field winding disposed between the cylindrical boss and the cylindrical part, and an outer periphery of the wall of the cylindrical part is formed to give cyclic changes of magneto-resistance corresponding to a cycle of an electric angle 2 &pgr; of the multi-phase windings.