Patent ID: 6971153

Claim:
A method of manufacturing a winding for a rotary electric machine, comprising: preparing a plurality of electric conductors, each of which has a substantially rectangular cross-section that has corners with a predetermined radius curvature, and surfaces of which are coated with an insulating film; preparing a die in a predetermined shape having curved corner portions formed with a predetermined radius curvature that is smaller than the radius curvature of the electric conductor; placing a portion of the electric conductor in the die; pressing the portion of the electric conductor with a punch in a direction perpendicular to a longitudinal direction of the electric conductor to reduce a dimension of the substantially rectangular cross-section of the electric conductor, and to form a dent in the electric conductor and the corners of the electric conductor in the shape of the corner portions of the die; and connecting the electric conductors to form winding in a manner that the adjacent electric conductors cross each other in the portions where the dents are formed.