Patent ID: 7876016

Claim:
A stator assembly, comprising: a stator core having a first end, a second end, and a plurality of slots extending from the first end to the second end, wherein each of the plurality of slots includes an outer slot portion that is closer to an outer peripheral surface of the stator core and an inner slot portion that is closer to an inner peripheral surface of the stator core; a plurality of conductive bundles each including a plurality of individually insulated conductive wires, the bundles being wrapped around the stator core in a plurality of turns that extend between the first end and the second end of the stator core, portions of the plurality of conductive bundles being placed into the plurality of slots, the bundle portions being twisted by a predetermined amount within the slots to minimize a circulatory current between the individually insulated conductive wires; and wherein the conductive bundles are arranged into pairs in a double star configuration, each pair of conductive bundles including a first conductive bundle and a second conductive bundle connected in parallel, each pair of conductive bundles corresponding to a phase of alternating current produced by the stator assembly, and wherein selected slots of the stator core include a portion of the first bundle of a selected pair in one of the inner or outer slot portion and include a portion of the second bundle of the selected the pair in the other of the inner or outer slot portion with the bundle portions being separated by an insulating separation layer within the slot.