永磁同步电机转子拓扑结构优化与电磁性能分析

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

为研究不同转子拓扑结构对永磁同步电机的电磁性能影响,采用多目标优化算法对双层永磁体永磁电机结构参数进行优化,深入分析了电机永磁体长度、永磁体宽度、磁桥宽度以及永磁体与轴心距离等结构参数对永磁同步电机电磁性能的影响,并通过Maxwell仿真分析优化前后电机的电磁性能。建立了传统单层V型永磁同步电机和优化后的双层永磁体内置V型永磁同步电机的二维模型,仿真结果表明:优化后的双层V型结构的永磁同步电机空转反电势幅值、输出转矩和输出功率均高于传统单层V型结构永磁电机,其转矩脉动下降了10.99%和谐波畸变率下降了0.17%。详细分析了永磁同步电机不同结构参数对电磁性能的影响,可为设计优化永磁同步电机提供指导意义。

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.