Patent ID: 6633098
Filing Date: 2003-10-14
Classification: H02K

Abstract:
An alternator for use in a vehicle, comprising:a stator having a stator core being formed in a cylindrical shape and a stator coil wound around said stator core; a rotor having pole cores and an excitation coil, being attached on an axially extending rotation shaft, so as to be located within said stator; brackets, being thermally connected to said stator for supporting said stator, for supporting said rotation shaft at both sides of said rotor, and being closed at one side of said rotor; cooling liquid passages provided in said brackets; a cooling fan provided at the closing side of said rotor and a cooling fin provided in vicinity of said cooling liquid passages, said cooling fin being arranged so as to oppose said cooling fan in an axial direction of said rotor so as to enable generation of a circulating cooling air flow which flows from said cooling fan via said cooling fin to return to said cooling fan.