Patent ID: 7102263

Claim:
A permanent magnet rotary electric machine having a rotor and a stator, one of said rotor and said stator comprising a plurality of permanent magnets disposed such that polarities of adjacent magnets are different from each other, the other of said rotor and said stator comprising a plurality of electrical coils wound around cores juxtaposed to said permanent magnets for cooperation therewith, said coil windings being arranged in groups of coil windings, the coil windings of said groups having their windings connected to each other and common ends, no two coil windings of each group being circumferentially adjacent to the other, all said permanent magnets being of substantially of the same shape with a circumferential offset angle of each permanent magnet from a regularly disposed position being set such that a cogging number per rotation of the rotor is equivalent to as the least common multiple of the number S of slots between the electrical winding cores and the number P of magnetic poles and one of said cores and said permanent magnets being disposed in nonsymmetrical relation to the axis of rotation of said machine.