软磁复合(SMC)材料因其材料特性及微观结构特点，具有涡流损耗系数低、各向同性等优点，适用于超高速永磁同步电机(PMSM)设计，可以有效降低电机铁耗。以1台额定转速4 000 r/min、额定频率533.33 Hz的PMSM为例，从电磁特性、铁耗分析计算等角度对SMC材料及硅钢片进行对比分析及有限元仿真计算，通过样机试验验证SMC材料分析结果的有效性。利用该分析方法，以1台采用SMC材料的120 000 r/min的超高速PMSM为例，对比分析不同极槽配合对电磁性能的影响，对SMC材料应用于超高速PMSM提供一定的指导。
Due to its material characteristics and microstructure, soft magnetic composite (SMC) material has the advantages of low eddy current loss coefficient, isotropy and so on. It is suitable for the design of ultra-high-speed permanent magnet synchronous motor (PMSM), which can effectively reduce the motor iron loss. Taking a PMSM with a rotation speed of 4 000 r/min and a frequency of 533.33 Hz as an example, the comparison analysis and finite element simulation calculation of SMC materials and silicon steel sheets are carried out from the aspects of electromagnetic properties and iron loss analysis. The validity of SMC material analysis results is verified by prototype test. The analytical method is used and a 120 000 r/min ultra-high-speed PMSM using SMC material is taken as an example to compare and analyze the influence of different pole and slot matching on electromagnetic performance. It provides certain guidance for the application of SMC materials to ultra-high-speed PMSM.