永磁辅助同步磁阻电动机（PMaSRM）内同时存在永磁转矩和磁阻转矩。不同转矩分量的占比大小和转矩脉动大小是评价电机电磁结构设计合理性的重要指标。以一台3 kW的PMaSRM为研究对象，在考虑磁路饱和与d、q轴交叉耦合因素的影响下，采用冻结磁导率法进行了电机的转矩分离和转矩脉动分离。基于转矩分量和转矩脉动分量的分离结果，以降低负载齿槽转矩为目标，进行了电机转子结构的优化设计，为PMaSRM的设计提供了参考。

There are both permanent magnet torque and reluctance torque in permanent magnet-assisted synchronous reluctance motor (PMaSRM). The proportion of different torque components and torque ripple are important indexs to evaluate the rationality of electromagnetic structure design of motor. Taking a 3 kW PMaSRM as the research object, considering the influence of magnetic circuit saturation and d/q-axis cross coupling factors, the torque separation and torque ripple separation of the motor is carried out by the frozen permeability method. Based on the separation result of torque components and torque ripple components, with the goal of reducing the cogging torque under load, the optimization design of motor rotor structure is carried out, which provides reference value for the design of PMaSRM.