Patent ID: 7032291

Claim:
A method of manufacturing a stator winding mounted in a stator core of a rotary electric machine including a plurality of first U-shaped conductor segments having a turn portion and a pair of first straight portions disposed in a radial direction and a second U-shaped conductor segment having a turn portion and a pair of second straight portions disposed at positions shifted from each other in a circumferential direction, wherein the second straight portions are longer in the axial direction than the first straight portions, said method comprising: a twisting step of circumferentially moving the first straight portions and the second straight portions while restraining the turn portions of the first conductor segments in the axial direction by a pressing tool, an inserting step of inserting the previously twisted first and second conductor segments into respective slots formed in the stator core, a bending step of bending the first and second straight portions at ends opposite the turn portions thereof in the circumferential direction, a joining step of joining the previously bent first and second conductor segments adjacent to each other, wherein the pressing tool comprises a stationary top plate that has a recess and a movable top plate that is movable to close the recess, and the second straight portions are inserted to the recess to protrude therefrom and the movable top plate is closed after inserting of the second straight portions.