Patent ID: 8174160

Claim:
A group of three stator windings for a stator of an electric machine, wherein the stator comprises a first cylindrical surface with a plurality circumferentially spaced winding slots, each winding slot extending along an axial length of the first cylindrical surface and formed to embed a segment of a single stator winding, each stator winding pre-formed as a closed loop, two substantially parallel segments of each stator winding formed to be embedded in a first and a second winding slot of the stator, with the second winding slot being the third adjacent winding slot to the first winding slot, each of the three stator windings comprising a first winding head segment extending from the winding slots in an axial direction of the stator, and a second winding head segment extending from the winding slots in opposite axial direction of the stator than the first winding head segment, the first winding head segments of the three stator windings differing in form so that the first winding head segments of at least two of the three stator windings are differently tilted in a radial direction of the electric machine, and a length of the closed-loop of each one of the three stator windings substantially the same and each stator winding lacking twists along the length of the closed-loop, wherein the first winding head segment of a first of the three stator windings is identical in form to the second winding head segment of a second of the three stator windings.