Patent ID: 6781260
Filing Date: 2004-08-24
Classification: H02K

Abstract:
A permanent magnet rotary machine comprising:a stator having an annular magnetic member and three stator magnetic poles extending radially from the annular magnetic member, a plurality of windings of three phases, each winding being wound around each of the stator magnetic poles, two adjacent sets of rotors, said rotors are arranged in the axial direction without an angular displacement therebetween and said rotors face the stator with an air gap therebetween, and two permanent magnets magnetized in the axial direction, wherein each of the stator magnetic poles has a plurality of magnetic teeth at the tip end thereof, each set of the rotors consists of two rotor elements, each of said rotor elements having Nr pieces of small tooth on the outer peripheral surface thereof, each of two permanent magnets is held by the two rotor elements in each set of the rotor, and the two rotor elements in each set of the rotor are deviated by Â½ the pitch of the small rotor tooth from each other in the circumferential direction so that the small rotor teeth of adjacent rotor elements of two adjacent sets of the rotors are the same in polarity.