Patent ID: 7417351

Claim:
A rotary machine comprising; a stator which has a stator iron core having a plurality of slots formed in a direction of a rotation axis and stator windings being constituted with a plurality of conductors respectively inserted into said plurality of slots; and a rotor having a plurality of magnetic poles arranged so that their polarities alternately differs in a rotational direction and positioned inside said stator with an air gap between said rotor and said stator, wherein said stator windings comprise plural sets of multi-phase windings, and each set of multi-phase windings comprises a 3-phase windings, and each phase winding of said 3-phase winding comprises said plurality of conductors electrically connected across said slots of said stator iron core so as to correspond to said plurality of magnetic poles, wherein the number of slots in stator is 90 the number of stator-magnetic poles is 12 per pair of a rotor-magnetic N-pole and a S-pole; the number of conductors of each stator-magnetic pole is 5; the number of slots decided from the number of stator-magnetic poles if 2.5 per phase, per pole and per two magnetic poles of said rotor, and wherein said 3-phase winding of said stator is two sets per said two magnetic poles of said rotor, wherein said two sets of 3-phase windings have a double circuits of an inside circuit and, an outside circuit being formed in said slots, and wherein said 2.5 slots per phase and per pole have a combination of 3 inside circuit-conductors and 2 outside circuit-conductors and a combination of 2 inside circuit-conductors and 3 outside circuit-conductors, namely, two different combinations of said 5 conductors.