Patent ID: 8368273

Claim:
A rotary electric machine comprising: a stator having stator windings wound in fractional pitch winding; a rotor rotatably disposed in the stator, said rotor having a rotor core, wherein the rotor core is divided into a plurality of division cores provided in an axial direction, each of said division cores having a plurality of magnets and a plurality of magnetic auxiliary salient pole portions formed between poles of the magnets, and wherein a magnetic air gap is provided in the axial direction of the rotor in a position shifted in a circumferential direction from a q axis passing through a center of a magnetic auxiliary salient pole within the magnetic auxiliary salient pole portion, wherein each of the division cores have its own amount of shifting the magnetic air gap from the q axis in the circumferential direction, and each of the amounts of shifting are set so as to reduce twelfth torque pulsation, which is a part of torque pulsation in energization of the rotor.