电工技术学报2025，Vol.40Issue(6)：1758-1770,13.DOI:10.19595/j.cnki.1000-6753.tces.240261
逆变器供电下混合磁心爪极永磁电机的多物理场耦合分析
Multi-Physics Coupling Analysis of Permanent Magnet Claw Pole Machine with Hybrid Cores by Inverter Power Supply
摘要
Abstract
The stator core of the permanent magnet claw pole machine(PMCPM)is typically made of soft magnetic composite material(SMC).SMC has defects such as high eddy current loss at low frequency,low magnetic permeability,and poor mechanical strength.In addition,because of the high cost of manufacturing large-sized SMC cores,previous designs for PMCPM were often based on low-power motors.If SMC is combined with other materials,using hybrid cores can improve PMCPM performance and reduce manufacturing costs.However,research on PMCPM with hybrid cores is limited to electromagnetic fields.Various physical fields inside the motor are coupled,and a multi-physics coupling analysis should be used to comprehensively study the impact of hybrid cores. Compared with traditional PMCPM with SMC cores,the paper studies the impact of inverter power supply on the performance of PMCPM with hybrid cores and summarizes the advantages of hybrid cores.Firstly,the electromagnetic performance of PMCPM with hybrid cores is analyzed using the field-circuit coupling method.The temperature distribution of PMCPM with hybrid cores under different power supply modes is obtained,and the influence of the power supply mode is studied.Then,a comparison is made between PMCPM with hybrid cores and PMCPM with SMC cores from the perspectives of electromagnetic field,temperature field,and stress field.Finally,the simulation results are validated through prototype experiments. The multi-physics coupling simulation analysis shows that under rated conditions,the torque ripple of the motor is 22.5％when powered by the inverter and only 10％when powered by the current source.The inverter power supply greatly increases the torque ripple,increasing the iron and permanent magnet eddy current losses by 22.2％and 44％,respectively.Compared with the PMCPM with SMC cores,hybrid cores reduce the maximum compressive stress on the SMC part of the stator core by 34.1％and the material cost of the motor by 21.6％. The following conclusions can be drawn.Compared with the current source power supply,the inverter power supply increases the losses of the motor,especially iron loss and permanent magnet eddy current loss.At the same time,it affects the waveform of the motor torque but has little effect on the torque amplitude and temperature distribution of the motor.The no-load and load characteristics of PMCPM with hybrid and SMC cores are almost the same,and their losses and temperature distributions are also very close.Compared to PMCPM with SMC cores,PMCPM with hybrid cores has higher mechanical strength and lower costs.关键词
爪极电机/软磁复合材料/混合磁心/场路耦合/磁热耦合Key words
Claw pole machine/soft magnetic composite/hybrid cores/field-circuit coupling/magnetic-thermal coupling分类
信息技术与安全科学引用本文复制引用
刘成成,杜汉东,雷刚,汪友华,朱建国..逆变器供电下混合磁心爪极永磁电机的多物理场耦合分析[J].电工技术学报,2025,40(6):1758-1770,13.基金项目
国家自然科学基金资助项目(52007047,52377006). （52007047,52377006）
