Patent ID: 6429552
Filing Date: 2002-08-06
Classification: H02K

Abstract:
An a.c. generator for a vehicle comprising:a rotator having a claw pole; a stator arranged opposite to an outer periphery of said rotator; a frame for supporting said rotator; a commutator provided on one side of said frame; and a pulley for driving said rotator, the pulley being provided on the other side of said frame, wherein said stator includes a stator core, in which a plurality of slots are formed, and a stator coil provided in said slots, said stator coil being made up of a plurality of joined conductor segments and having coil ends protruding in axial directions of said stator, and said rotator has a blower for sending cooling air to said coil ends by its rotation, wherein said blower is a fan provided at an end portion of said rotator, and means for reducing wind noise due to cooling air passing between said coil ends, by blocking air gaps between said coil ends with a resin, while simultaneously compensating for decreased heat transfer due to blockage of said air gaps, by adding an additive to said resin having a higher thermal conductivity than said resin.