Optimization of Rotor Topology Structure and Electromagnetic Performance Analysis of Permanent Magnet Synchronous Motor

To study the influence of different rotor topologies on the electromagnetic performance of permanent magnet synchronous motor（PMSM）,a multi-objective optimization algorithm was used to optimize the structural parameters of a double-layer PMSM.The influence of structural parameters such as the length, width, bridge width, and distance between the permanent magnet and the axis on the electromagnetic performance of the PMSM was analyzed in depth, and the motor performance before and after optimization was analyzed through Maxwell simulation.A two-dimensional model was established for the traditional single-layer V-shaped PMSM and the optimized double-layer permanent magnet built-in V-shaped PMSM.The simulation results showed that the optimized double-layer V-shaped structure of the PMSM had higher no-load back electromotive force amplitude, output torque, and output power than the traditional single-layer V-shaped structure PMSM.The torque ripple decreased by 10.99% and the harmonic distortion rate decreased by 0.17%.By analyzing the influence of different motor structural parameters on electromagnetic performance, guidance can be provided for designing and optimizing PMSM.