Patent ID: 6404096
Filing Date: 2002-06-11
Classification: H02K

Abstract:
An alternating current generator for vehicle, comprising:a stator core in which a three-phase stator coil is wound and inserted into slots, a first rotor core and a second rotor core which are provided in the side of an inner diameter of said stator core and rotate with a rotating shaft, a field coil for magnetizing said first and second rotor cores in different magnetic poles, and a plurality of magnetic poles which are provided so as to extend to an axial direction of said rotating shaft from said first and second rotor cores and are arranged so as to have engagement alternately through predetermined gaps between said magnetic poles and are opposite to the surface of the inner diameter of said stator core through an air gap, wherein said magnetic poles have a plurality of parts in the axial direction and are stepwise formed and the respective parts are set to different widths in a rotational direction, so that a pitch of the rotational direction between centerlines of the gaps between said adjacent magnetic poles is configured so as to change stepwise in the axial direction.