Patent ID: 6025659
Filing Date: 2000-02-15
Classification: H02K

Abstract:
A synchronous motor comprising:a plurality of individual permanent magnets attached on the inside of a movable part thereof,a magnetic yoke for the pole N located in said movable part and commonly connected to each magnetic pole N of a plurality of said individual permanent magnets,a magnetic yoke for the pole S located in said movable part and commonly connected to each magnetic pole S of a plurality of said individual permanent magnets,a magnetic pole N in the shape of protruding pole which forms a part of said magnetic yoke for the pole N and being located at the place facing a stator,a magnetic pole S in the shape of protruding pole which forms a part of said magnetic yoke for the pole S and being located along a traverse direction of said movable part between said magnetic pole N,a three-phase alternating current winding being wound in such a manner as to correspond to the magnetic pole N and the pole S and being attached on the inside of said movable part, andsaid stator wherein parts of which magnetic reluctance is high and parts of which magnetic reluctance is low are located alternately in a traverse direction of said movable part and the pitch thereof is different from the pitch of magnetic poles attached on said movable part.