Patent ID: 8823238

Claim:
A wave winding for an ironless core electrical machine, comprising at least one conductor, the conductor comprising multiple strands of wire and an outer insulating layer, and having a wave shape that progresses around the winding comprising a plurality of legs connected by end turns, with at least a portion of at least one end turn following a curved path, wherein the cross section of the end turn at least at one point on the curved path, viewed normal to the curved path, is thicker in a radial direction than an axial direction, the radial and axial directions being with respect to the instantaneous center of curvature of the curved path at the point the end turn flattens with respect to the legs to form said cross section, and that the curved path combined with flattening of the end turn relative to the legs allows the end turn of the conductor to be nested with the end turn of a like conductor.