Patent ID: 6531803
Filing Date: 2003-03-11
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 the 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 are formed in a substantially trapezoid shape of taper to the axial direction, and a part with a large angle of inclination to the axial direction is provided in the center of the axial direction, and the axial length of said part is set to 30% or shorter to the whole axial length of said magnetic poles.