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

作　　者：刘成成[1] 杜汉东 雷刚 汪友华[1] 朱建国 Liu Chengcheng;Du Handong;Lei Gang;Wang Youhua;Zhu Jianguo(State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Electrical Engineering Hebei University of Technology,Tianjin 300130 China;State Grid Tangshan Power Supply Company,Tangshan 063000 China;School of Electrical and Data Engineering University of Technology Sydney,Ultimo NSW 2007 Australia;School of Electrical and Information Engineering University of Sydney,Sydney NSW 2006 Australia)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室河北工业大学电气工程学院,天津300130 [2]国网唐山供电公司,唐山063000 [3]悉尼科技大学电气与数据工程学院,乌尔蒂莫NSW 2007 [4]悉尼大学电气与信息工程学院,悉尼NSW 2006

出　　处：《电工技术学报》2025年第6期1758-1770,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52007047,52377006)。

摘　　要：与传统的软磁复合材料(SMC)磁心爪极电机相比,采用混合磁心能够有效地降低制造成本。为了更全面地分析混合磁心对爪极电机性能的影响,该文首先对比分析了逆变器供电和理想正弦电流源供电两种情况下电机的电磁性能和损耗;然后以电磁分析的结果为基础,通过磁热双向耦合的方法分析了供电方式对电机温升的影响;最后从电磁场、温度场、应力场等多个角度,对混合磁心电机与SMC磁心电机进行了对比,并通过样机实验对仿真结果进行了验证。结果表明,逆变器供电会导致混合磁心电机的铁耗和永磁体涡流损耗明显增大,但是对电机温度没有显著影响。同时,比起SMC磁心电机,混合磁心电机在低速下具有更好的性能表现,还具有更高的机械强度和更低的成本。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.

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 

分 类 号：TM352[电气工程—电机]