Patent ID: 7284314

Claim:
A method of manufacturing a rotor of a rotary electric machine, comprising: preparing a material sheet in a form of a belt, wherein the material sheet has teeth extending from a first side of a middle portion of the material sheet and projections projecting from a second side of the middle portion in a direction opposite to the teeth, the projections define recesses therebetween, and each projection and each recess has substantially the same dimension with respect to a centerline between a first line passing through tops of the projections and a second line passing through bottoms of the recesses, wherein a dimension (H) of the teeth and a dimension (T) of the middle portion and the projections, the dimensions measured with respect to a direction perpendicular to the centerline, satisfy a relation 2×H≦T; and helically winding the material sheet such that the projections are located on an inner diameter side of a rotor core.