ROTOR FOR PERMANENT MAGNET MOTOR

摘要

A permanent magnet (3) is welded to a rotor yoke (1) by beam welding, with a metal film (4) interposed therebetween. The portion of the metal film (4) to which a vacuum beam or a laser beam is applied is melted and serves as a brazing filler material of the welding. Thus, the joint between the permanent magnet (3) and the rotor yoke (1) is strengthened. It is unnecessary to embed the permanent magnet (3) in the rotor yoke (1) and to use any adhesive of a polymer. Therefore, the cost can be reduced.