Abstract
This paper describes the characteristics of the cogging torque based on four factors through the coordination between analysis and experiment. Four factors are air-gap of fitting part of divided core, annealing, a shape of inside diameter of stator, and eccentricity. This paper clarifies the influence of each factor. It is noted that air-gap of fitting part of divided core, annealing, and eccentricity have an influence to the cogging torque based on the least common multiple of pole number and slot number in 8-pole 12-slot PM motor. On the other hand, the shape of inside diameter of stator has the influence to the cogging torque of pole number order. The adequacy of the analysis model is proved by experiments.
