同步磁阻电机(SynRM)具有效率高、成本低、结构简单等优点，但其存在转矩脉动大等问题，会影响电机的平稳运行。为了降低SynRM的转矩脉动，需要对转子结构进行优化。以一台22 kW四极的SynRM为例，采用田口法对不同电流负载下的SynRM转子结构进行优化。确定SynRM的转子拓扑，探究SynRM转子结构的关键参数对转矩性能的影响，初步确定转子关键参数的范围。利用田口法对不同电流负载下的电机进行试验分析，得到最优转子结构参数组合，利用有限元仿真验证优化结果。为了增强转子的机械强度，在转子结构中添加径向磁桥，探究径向磁桥对电机转矩性能的影响。

Synchronous reluctance motor (SynRM) has the advantages of high efficiency, low cost and simple structure, but the large torque ripple has an effect on its smooth operation. In order to reduce the torque ripple of SynRM, it is necessary to optimize the rotor structure. A 22 kW four-pole SynRM is taken as an example, and Taguchi method is used to optimize the rotor structure of SynRM under different current loads. The rotor topology of SynRM is determined, the influence of key parameters of SynRM rotor structure on torque performance is explored, and the range of key parameters is preliminarily determined. Then, based on Taguchi method, the experimental analysis on motor is conducted under different current loads to obtain the optimal combination of rotor structure parameters, and the finite element simulation is used to verify the optimization results. In order to enhance the mechanical strength of the rotor, a radial magnetic bridge is added to the rotor structure, and the influence of the radial magnetic bridge on the torque performance of the motor is studied.

国家自然科学基金项目(51977055)；安徽省科技重大专项项目(201903a05020042)