Patent ID: 6013962
Filing Date: 2000-01-11
Classification: H02K

Abstract:
A permanent magnet motor comprising:a stator wherein a three-phase alternating current winding is looped and a number m of teeth protrude from a slotted portion, being a part of the stator;a plurality of individual permanent magnets placed on the inside of a rotor;magnetic circuits for the pole N commonly connected to the north pole of a plurality of said permanent magnets;magnetic circuits for the pole S commonly connected to the south pole of a plurality of said permanent magnets;magnetic poles N in the shape of protruding poles of the north pole, forming a part of said magnetic circuits for the pole N, placed on a part around the perimeter of the rotor, and being R in number, where R is different from the number m; andmagnetic poles S in the shape of protruding poles of the south pole, forming a part of said magnetic circuits for the pole S, placed on a part around the perimeter of the rotor alternately in a rotational direction of the rotor with said magnetic poles N in the shape of protruding poles of the north pole, and being R in number, wherein the magnetic circuits for the pole N commonly connect at least two of the magnetic poles N and the magnetic circuits for the pole S commonly connect at least two of the magnetic poles S.