Patent ID: 6621186
Filing Date: 2003-09-16
Classification: H02K

Abstract:
An alternator for a vehicle, comprising:a stator including a stator core and a stator coil wound around the stator core; a rotor including a magnetic pole core and a field coil for magnetizing the magnetic pole core; a rotary disk rotationally connected to the rotor and including rotary disk fins each projecting axially and extending in a circumferential direction; and a stationary disk axially facing to the rotary disk and including stationary disk fins each projecting axially and extending in the circumferential direction in such a manner that one of the rotary disk fins and one of the stationary disk fins which are radially adjacent to each other face radially to each other to form a space extending in the circumferential direction; and wherein one of the one of the rotary disk fins and the one of the stationary disk fins which are radially adjacent to each other and face radially to each other to form the space has projections projecting radially in the space toward another one of the one of the rotary disk fins and the one of the stationary disk fins, and the projections have a longitudinal direction which is parallel to a rotational axis of the rotor.