A Method for Improving Torque Performances of IPMSM

摘要

This paper presents a method for improving torque performances by shifting magnets and optimal flux-barrier shape in Interior Permanent Magnet Synchronous Machine (IPMSM), in which cogging torque and torque ripple are significantly reduced together, while average torque is preserved. At first, the theoretical magnets shifting angle for reduction cogging torque is found through mathematical expression. Then the flux-barrier shape optimization based on Taguchi method is conducted to improve average torque and further decrease cogging torque, so torque ripple is suppressed to some extent. Finally, from the perspective of simulation results by finite element analysis (FEA), it can be illustrated the effectiveness of the proposed method is verified.