Six single phase winding portions (30) are installed in slots disposed at a ratio of two per phase per pole. Conductor wire winds extending outwards from ends of said slots (15a) are divided onto first and second circumferential sides and enter slots on said first and second circumferential sides. To construct a current winding (160), said three single phase winding portions are formed into a Y-connection, slots (15a) out of which neutral point lead wires (32a) of said three single phase winding portions are led being disposed between a circumferentially adjacent pair of slots out of which output wires (32b) of said single phase winding portions are led. A single phase winding portion (47) is constructed by installing the conductor wire (36) in a lap winding in said slots (15a). Winding sub-portions are formed by installing at least one strand of conductor wire in the stator core, the number of divided winds of said conductor wire extending outwards from the first and second ends of the slots being different in each of said plurality of winding sub-portions. The total number of divided winds is the same on the first and second circumferential side.