위상 시프트 권선을 가진 고정자를 가진 전기 기계

1. A multi-phase electric machine comprising: a stator operably coupled with a rotor wherein the rotor is rotatable relative to the stator;the stator including a stator core defining a central opening and a plurality of axially extending slots which circumscribe the central opening;a plurality of windings mounted on the stator core wherein the plurality of windings define a plurality of phases and wherein, for each phase, the plurality of windings include:at least two parallel windings, each winding comprising a pair of continuous wires which are disposed in an equal number of slots; wherein, for each pole, the parallel windings are disposed in at least one central slot and two outer slots disposed on opposite sides of the central slots whereby each pole has a first one of the outer slots disposed on the counterclockwise side of the at least one central slot and a second one of the outer slots disposed on the clockwise side of the at least one central slot; each winding disposed in each of the central slots an equal number of times and disposed in each of the outer slots an equal number of times and wherein each winding is disposed in each central slot twice the number of times that the winding is disposed in each outer slot to thereby define a slot fill ratio of 2:1 between central slots and outer slots and wherein each wire of the wire pair is disposed in the slots in a ratio that differs from the slot fill ratio;the stator assembly defining a standard pitch between each pole of each phase, the pitch being a common circumferential spacing between corresponding slots of each pole;and wherein each wire includes a phase shift end loop having the same non-standard pitch that differs from the standard pitch by one slot; each of the parallel windings having the phase shift end loop between first and second poles, whereby the phase shift end loops extend from one of the first and second outer slots and the at least one central slot of the first pole to the other one of the first and second outer slots and the at least one central slot in the second pole.