Patent ID: 6664674
Filing Date: 2003-12-16
Classification: H02K

Abstract:
A vehicle AC generator comprising:a rotor having a field coil and a cooling fan; a stator having an armature coil; a frame for supporting said rotor and stator, said frame having an air intake window for introducing air to said cooling fan; a rear cover fixed to said frame to provide an enclosure between said frame and said rear cover, said rear cover having an air intake window opposite said opening of said frame; a pair of C-shaped positive and negative cooling fins having a common cutout section at a half side of said enclosure thereby forming an accommodation space in said enclosure, said cooling fins being fixed to said frame to overlap each other in an axial direction; a plurality of positive and negative rectifier elements respectively fixed to said pair of positive and negative cooling fins at the other half side thereof; a pair of brushes for supplying field current to said rotor; a brush-holder, disposed in said accommodation space, for holding said pair of brushes, said brush-holder having a radially outside surface disposed behind said positive and negative rectifier elements to intersect said cutout section; a connector case having radially outside surface disposed in said accommodation space to intersect said cutout section at a portion radially outside said brush holder so as to form a cooling air passage directly connecting said air intake window of said rear cover and said cooling fan, said connector case having a terminal for transmitting and receiving electric signals; and an IC regulator, disposed in said cooling air passage around said connector case to face said rear cover, for controlling output voltage of said armature coil, said IC regulator having a heatsink disposed in said cooling air passage opposite said air intake window of said rear cover.