Patent ID: 8334633
Filing Date: 2012-12-18
Classification: H02K

Abstract:
1. A dynamoelectric machine comprising: a rotor comprising: a stator that is disposed so as to surround an outer circumference of said rotor so as to have a predetermined air gap interposed; and a metal fan comprising: wherein: a magnet holder that is made of a magnetic material that is held by a yoke portion so as to face an inner circumferential surface near a tip end of said claw-shaped magnetic pole portions, and said magnet holder defining therein an interfitting groove that has a groove direction in an axial direction is formed so as to open at least radially outward and axially outward, and so as to lead inward from an axially outer side; a permanent magnet that is held by said magnet holder by being fitted into said interfitting groove, that is disposed so as to face an inner circumferential surface near a tip end of said claw-shaped magnetic pole portions so as to have a predetermined clearance, and that is magnetically oriented in a reverse direction to a direction of a magnetic field that said field coil produces; and a metal thermally conductive plate that is disposed so as to extend axially inward from said base portion, and that has a projecting end portion that is placed in close contact with said permanent magnet.