Patent ID: 6700277
Filing Date: 2004-03-02
Classification: H02K,H02P

Abstract:
A vehicle AC generator including a stator, a rotor having a rotor core and a field coil wound around said rotor core, a flywheel element and a field current control unit for controlling field current supplied to said field coil, whereinsaid rotor core comprises a cylindrical boss portion, a pair of disk portions extending radially outward from opposite axial ends of said boss portion, and a plurality of trapezoidal claw-pole portions bending to respectively extend in axial directions from outer circumferences of said pair of disk portions to alternately interleave with each other to form a zigzag space between said claw-pole portions, thereby forming a magnetic path for supplying magnetic flux to said stator, said field coil comprises a main coil portion disposed on said boss portion and a sub-coil portion series-connected to said main coil and disposed between said main coil and said claw-pole portions to jointly cross said magnetic path, and said flywheel element is connected in parallel with one of said main coil and said sub-coil.