A method for obtaining the optimal design of single-phase permanent magnet (PM) synchronous motors was developed. This method is based on 3D electromagnetic field analysis and electrical circuit analysis. Numerical results show that the torque ripple for the motor shape optimized by using the proposed method is half that for the initial motor shape. Thus the proposed method is extremely effective for reducing the torque ripple in the motor. Further, the optimal design can be obtained within an acceptable CPU time by using this method.
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