Patent ID: 6847150
Filing Date: 2005-01-25
Classification: H02K

Abstract:
1. A rotating electrical machine for a vehicle, comprising: a stator including a multi-phase armature winding wound around an armature core; a rotor including a pair of field cores which are disposed at an inner diameter side of the armature core through a gap and rotate together with a rotating shaft; and a field winding for magnetizing the pair of field cores, wherein the pair of field cores respectively includes a plurality of magnetic poles extending in an axial direction of the rotating shaft and being arranged to alternately engage with each other through a predetermined clearance Dc, each of the plurality of magnetic poles having a width in a rotational direction thereof which is formed in a stair shape and smaller toward a tip thereof, and the clearance Dc between adjacent magnetic poles is set within a range from 50° to 70° in electrical angle.