Patent ID: 7579737

Claim:
An armature winding of an electric rotating machine, wherein at least one armature winding bar composed of a plurality of element wire conductors is provided in a plurality of winding slots formed in a stator core, each of the element wire conductors is twisted and transposed toward an extension direction of the winding slots in the winding slots, and the element wire conductors are short-circuited at both ends protruding outside from both ends of slots of the stator core, and wherein the armature winding has the armature winding bar in which a transposition pitch of the portion of the element wire conductor provided in a middle zone is different from each of transposition pitches in border zones at both end portions of the winding slot, transposing angles in one border zone and the middle zone of the winding slot are both set at 180 degrees, and a transposing angle of the other border zone of the winding slot in the element wire conductor is set to be different from 180 degrees.