Patent ID: 7196441
Filing Date: 2007-03-27
Classification: H01L,H02K

Abstract:
1. An AC generator for a vehicle, comprising: a rotor; a stator disposed in opposed relation to said rotor; a frame for supporting said rotor and said stator; a rectifier fixedly secured to said frame and equipped with a radiating fin which cools a rectifying element and makes an electrical connection; and a cooling wind generating device for sucking cooling wind through said rectifier into the rotor side, wherein said radiating fin comprises: a fixing portion to which said rectifying element is fixedly secured; a first sub-fin extending radially from said fixing portion toward an outer circumferential end portion of said radiating fin observed from a position of said rectifying element; and a second sub-fin, having an arc-like configuration formed concentrically with the axis of said rectifying element, made to divide an air passage surrounded by said fixing portion, said first sub-fin and the outer circumferential end portion of said radiating fin, and the first sub-fin traverses the air passage and the second sub-fin.