摘要：论述了一种洗衣机用永磁同步电动机(PMSM)气隙磁密的优化方法。目标是优化气隙磁密，提高磁钢的功率密度，以提高电机输出转矩。针对洗衣机用PMSM，提出了一种不等厚磁钢的设计方法，为气隙磁场注入三次谐波成分。利用有限元仿真软件Ansoft对二维电机模型进行分析，计算结果表明该不等厚磁钢能够优化气隙磁密，提高电机输出转矩。

关键词：优化；气隙磁密；永磁同步电机;不等厚磁钢
Abstract: This paper discussed the optimization of a wash machine permanent magnet synchronous motor flux density. Our goal is to optimize the airgap flux density,improve the power density of the permanent magnet to enhance the output torque. An unequal thickness magnet design methods for permanent magnet synchronous motor PWM control, injected three times for the airgap magnetic field harmonic components. The analysis of twodimensional motor model using the finite element simulation software Ansoft calculation results show that the unequal thickness magnet can optimize the flux density and enhance the output torque.

Key words: optimization; airgap flux density；wash machine permanent magnet synchronous motor；unequal thickness magnet