Alternator for vehicle

摘要

An alternator for a vehicle, comprising: a stator including a stator iron core and a stator winding, the stator winding being provided on the stator iron core and forming two coil ends which project from two end surfaces of the stator iron core in axial directions, respectively; a rotor including a fan located at an axial-direction end thereof and inward of one of the two coil ends; a frame covering said one of the two coil ends and the fan, and having a window opposed to the fan in an axial direction and a window located at a radial-direction outer side of said one of the two coil ends and the fan; wherein only said one of the two coil ends has an inside diameter such that the inside diameter at an axial-direction tip portion is smaller than that at an axial-direction base portion and the inside diameter at the axial-direction tip portion is smaller than an outside diameter of the rotor and is greater than an outside diameter of the fan.