Patent ID: 6617718
Filing Date: 2003-09-09
Classification: H02K

Abstract:
An automotive alternator comprising:a shaft rotatably supported by a case; a rotor fixed to said shaft; a stator provided with: a cylindrical stator core supported by said case so as to envelop said rotor, a plurality of slots extending axially being formed in said stator core so as to line up circumferentially; and a stator winding installed in said stator core; a rectifier supported by said case so as to face an axial end surface of said rotor; and at least one cooling fan fixed to at least one axial end surface of said rotor, wherein said cooling fan is constructed such that a ratio (t/h) between an amount of axial protrusion t of said cooling fan relative to an apex portion of a coil end group of said stator winding and an axial height h of said cooling fan satisfies an expression 0.2