Patent ID: 7990014

Claim:
A rotating electrical machine comprising: a multi-phase single-layer stator winding that includes n pre-formed coils, wherein each pre-formed coil includes a pair of winding runs that are substantially parallel to each other in both the axial direction of the stator and the direction in which they extend into the stator; and a stator having a first cylindrical surface with 2n circumferentially spaced open-type winding slots formed in it, each winding slot extending along an axial length of the first cylindrical surface and having a central plane, wherein the 2n winding slots define n winding slot pairs, each pair having two winding slots for receiving one of the coils that are separated by one or more intermediate slots and whose central planes are circumferentially spaced at the first cylindrical surface of the stator by an angular distance that is equal to the angular pitch of the coil received in the winding slot pair, wherein the central planes of the two winding slots forming each winding slot pair are substantially parallel to one another and at least one of those central planes does not extend along a radius of the stator.