Patent ID: 7888829
Filing Date: 2011-02-15
Classification: H02K

Abstract:
1. A vehicle AC generator comprising: a frame including an end wall section and a peripheral wall section; a stator core fixed to an inner peripheral surface of the peripheral wall section; a stator coil constituted by a plurality of phase coils, the stator coil being wound around the stator core and having rear and front coil ends projecting axially rearward and frontward respectively from the stator core; a rotor located radially inwardly of the stator core and being rotatably supported by the frame; and a cooling fan having centrifugal blades and fixed to an end surface of the rotor; the peripheral wall section having a cooling air discharge opening adjoining the end wall section, the end wall section having a centrifugal-blade-facing portion axially facing the centrifugal blades, and a coil-end-facing portion axially facing the rear coil end, the coil-end-facing portion being bent at a predetermined curvature radius and extending from the centrifugal-blade-facing portion to the cooling air discharge opening, an inner end surface of the coil-end-facing portion being formed with a recess located axially rearwardly of a radial extension line of an inner end surface of the centrifugal-blade-facing portion, wherein the recess has a shape of circular arcs extending along a circumferential direction of the rotor, the rear coil end includes an axially projecting wiring section projecting axially rearward from a ring-like section thereof, and the axially projecting wiring section is located in a clearance between the rear coil end and the inner end surface of the coil-end-facing portion.