Patent ID: 8716914
Filing Date: 2014-05-06
Classification: H02K,Y10T

Abstract:
1. A stator of a vehicle AC generator, said vehicle AC generator comprising: a case which incorporates or removably supports constituent components; a shaft rotatably supported on said case; a rotor which has pole cores secured on said shaft and a field winding placed in said pole cores; a stator which includes a stator core located on the periphery of said rotor and to be held in sandwiched relation in said case, and a stator winding disposed in said stator core; a rectifier which rectifies AC electromotive force generated in said stator winding to DC; and a voltage regulator which restricts generated electric power to a specified value, wherein said stator core is formed by laminating steel sheets, said stator core being provided with a plurality of slot portions which accommodate said stator winding and a plurality of tooth portions, a tooth portion of the plurality of tooth portions is adjacent to each slot portion of the plurality of slot portions; said stator winding is disposed in the plurality of slot portions to constitute said stator; and said stator core having a layer of varnish filled between the laminates of each tooth portion, the layer of varnish being at least disposed in an inner diameter end surface region which faces said rotor, and having an epoxy resin varnish coated on a surface of each tooth portion, over the layer of varnish, to form an anti-rust film with a uniform thickness, the surface being located in the inner diameter end surface region, wherein the epoxy resin varnish is only disposed on the surface of each tooth portion of the plurality of tooth portions and is not disposed across plurality of slot portions.