Patent ID: 7148593

Claim:
A concentrated winding stator coil for an electric rotary machine, comprising: tooth coils provided for respective teeth, each tooth coil comprising a first layer coil wound on the surface of a tooth of a stator core in a direction advancing from a proximal end portion to a distal end portion of said tooth, a second layer coil disposed on said first layer coil and wound in a direction advancing from said distal end portion to said proximal end portion of said tooth, a winding start end and a winding terminal end disposed adjacently to said proximal end portion of said tooth, and a pair of lead wires extending outward in a radial direction from said winding start end and said winding terminal end; a predetermined number of crossover bus bars disposed in a circumferential direction to successively connect said lead wires of the tooth coils having the same phase, so as to arrange a phase winding consisting of all of the tooth coils having said same phase and serially connected; and neutral bus bars mutually connecting terminal ends of final tooth coils of respective phases to form a neutral point, wherein said crossover bus bars and said neutral bus bars are provided adjacently to a radial outer side of a coil end protruding in an axial direction of said tooth coil and also adjacently to one end face of a core back of said stator core; and said neutral bus bars are disposed at positions identical in both axial and radial directions with those of the bus bars of predetermined phase.