Armature winding of electric rotating machine, stator of electric rotating machine and electric rotating machine

A stator of an electric rotating machine, comprising:

• a stator core provided with a plurality of ventilation ducts in a radial direction and a plurality of winding slots in an axial direction;
• and
• an armature winding in which at least one armature winding bar is provided, the armature winding bar being composed of a plurality of element wire conductors stacked in each of the winding slots, respectively, the element wire conductors including one conductor having a twisted portion transposed toward an extension direction of the winding slots, at least two of the element wire conductors being short-circuited at both sides protruding outside from both side faces of the stator core, transposition pitches of the portion provided in both ends of the winding slot being different from that in a middle zone of the winding slot, and an entire transposing angle being approximately 540 degrees,
• wherein the armature winding bar has one end portion linearly protruding outside from one end of the winding slot and the other end portion having a linearly protruding length from the other end which is different from that of the one portion so as to reduce an unbalanced voltage generated between the element wire conductors, the voltage being generated at both ends of the winding due to a difference in magnetic fluxes interlinking at the element wire conductors.