Multi-Physics Coupling Analysis of Permanent Magnet Claw Pole Machine with Hybrid Cores by Inverter Power Supply
Liu Chengcheng1, Du Handong1,2, Lei Gang3, Wang Youhua1, Zhu Jianguo1,4
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Electrical Engineering Hebei University of Technology Tianjin 300130 China; 2. State Grid Tangshan Power Supply Company Tangshan 063000 China; 3. School of Electrical and Data Engineering University of Technology Sydney Ultimo NSW 2007 Australia; 4. School of Electrical and Information Engineering University of Sydney Sydney NSW 2006 Australia
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.
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.
Liu Chengcheng, Du Handong, Lei Gang, Wang Youhua, Zhu Jianguo. Multi-Physics Coupling Analysis of Permanent Magnet Claw Pole Machine with Hybrid Cores by Inverter Power Supply. Transactions of China Electrotechnical Society, 2025, 40(6): 1758-1770.
[1] Zhang Yuanzhi, Qu Ronghai, Li Dawei, et al.Design and optimization of an HTS claw-pole machine[J]. IEEE Transactions on Applied Superconductivity, 2020, 30(4): 5203406. [2] Zhang Yuanzhi, Li Dawei, Yan Peng, et al.A high torque density claw-pole permanent-magnets vernier machine[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022, 10(2): 1756-1765. [3] Liu Chengcheng, Li Xue, Lei Gang, et al.Perfor- mance evaluation of an axial flux claw pole machine with soft magnetic composite cores[J]. IEEE Transa- ctions on Applied Superconductivity, 2018, 28(3): 5202105. [4] 武岳, 张志锋. 轴向磁通永磁电机扁铜线交流铜耗的混合解析计算及抑制[J]. 电工技术学报, 2023, 38(24): 6609-6618. Wu Yue, Zhang Zhifeng.Hybrid analytical calcu- lation and suppression of AC copper loss of flat copper wire in axial flux permanent magnet motor[J]. Transactions of China Electrotechnical Society, 2023, 38(24): 6609-6618. [5] Schoppa A, Delarbre P.Soft magnetic powder com- posites and potential applications in modern electric machines and devices[J]. IEEE Transactions on Magnetics, 2014, 50(4): 2004304. [6] 武岳, 张志锋, 张冉. 表贴式轴向磁通电机梯形削极分段结构研究[J]. 电机与控制学报, 2024, 28(3): 84-95. Wu Yue, Zhang Zhifeng, Zhang Ran.Trapezoidal shaping segmented structure of surface mount axial flux permanent magnet motor[J]. Electric Machines and Control, 2024, 28(3): 84-95. [7] Krings A, Boglietti A, Cavagnino A, et al.Soft magnetic material status and trends in electric machines[J]. IEEE Transactions on Industrial Elec- tronics, 2017, 64(3): 2405-2414. [8] Liu Chengcheng, Lei Gang, Wang Tianshi, et al.Comparative study of small electrical machines with soft magnetic composite cores[J]. IEEE Transactions on Industrial Electronics, 2017, 64(2): 1049-1060. [9] Guo Youguang, Zhu Jianguo, Watterson P A, et al.Development of a PM transverse flux motor with soft magnetic composite core[J]. IEEE Transactions on Energy Conversion, 2006, 21(2): 426-434. [10] Guo Youguang, Zhu Jianguo, Dorrell D G.Design and analysis of a claw pole permanent magnet motor with molded soft magnetic composite core[J]. IEEE Transactions on Magnetics, 2009, 45(10): 4582-4585. [11] Liu C C, Wang D Y, Wang S P, et al.A novel flux reversal claw pole machine with soft magnetic composite cores[J]. IEEE Transactions on Applied Superconductivity, 2020, 30(4): 5202905. [12] Rabenstein L, Dietz A, Parspour N.Design concept of a wound field transverse flux machine using soft magnetic composite claw-poles[C]//2020 10th Inter- national Electric Drives Production Conference (EDPC), Ludwigsburg, Germany, 2020: 1-5. [13] Zhang Wenjing, Xu Yanliang, Sun Mingxin.Design of a novel claw pole transverse flux permanent magnet motor based on hybrid stator core[J]. IEEE Transactions on Magnetics, 2021, 57(6): 8104705. [14] Liu Chengcheng, Chao Zheng, Wang Shaopeng, et al.Design and performance analysis of permanent magnet claw pole machine with hybrid cores[J]. CES Transactions on Electrical Machines and Systems, 2023, 7(3): 275-283. [15] 李响, 郭鹏涛, 丁远. 基于场路结合的大功率直线超声波电机压电-热-结构多物理场分析[J]. 电工技术学报, 2024, 39(2): 423-433. Li Xiang, Guo Pengtao, Ding Yuan.Piezo-thermal- structure coupling analysis for high-power linear ultrasonic motor based on field-circuit combination method[J]. Transactions of China Electrotechnical Society, 2024, 39(2): 423-433. [16] 汪波, 黄珺, 查陈诚, 等. 多三相分数槽集中式绕组容错电机匝间短路故障温度场分析[J]. 电工技术学报, 2023, 38(19): 5101-5111. Wang Bo, Huang Jun, Zha Chencheng, et al.Thermal analysis of multiple 3-phase fractional slot con- centrated winding fault tolerant machine with turn fault[J]. Transactions of China Electrotechnical Society, 2023, 38(19): 5101-5111. [17] 唐钊, 刘轩东, 陈铭. 考虑流体动力学的干式变压器热网络模型仿真分析[J]. 电工技术学报, 2022, 37(18): 4777-4787. Tang Zhao, Liu Xuandong, Chen Ming.Simulation analysis of dry-type transformer thermal network model considering fluid dynamics[J]. Transactions of China Electrotechnical Society, 2022, 37(18): 4777-4787. [18] 师蔚, 骆凯传, 张舟云. 基于热网络法的永磁电机温度在线估计[J]. 电工技术学报, 2023, 38(10): 2686-2697. Shi Wei, Luo Kaichuan, Zhang Zhouyun.On-line temperature estimation of permanent magnet motor based on lumped parameter thermal network method[J]. Transactions of China Electrotechnical Society, 2023, 38(10): 2686-2697. [19] 王韶鹏, 刘成成, 汪友华, 等. 软磁复合材料永磁电机的6σ 稳健多学科设计优化方法[J]. 电工技术学报, 2019, 34(4): 637-645. Wang Shaopeng, Liu Chengcheng, Wang Youhua, et al.6σ robust multidisciplinary design optimization method for permanent magnet motors with soft magnetic composite cores[J]. Transactions of China Electrotechnical Society, 2019, 34(4): 637-645. [20] Liu Chengcheng, Wang Xue, Wang Shaopeng, et al.Magnetothermal coupling analysis of permanent magnet claw pole machine using combined 3D magnetic and thermal network method[J]. IEEE Transactions on Applied Superconductivity, 2022, 32(6): 0600505. [21] Liu Chengcheng, Li Yue, Zhang Hongming, et al.Performance analysis of permanent magnet claw pole machine based on magneto-electric-thermal coupling network method[J]. Electrical Engineering, 2024, 106(3): 3559-3572. [22] 程明, 张邦富, 王飒飒, 等. 模块化细轭部磁通切换永磁直线电机及其控制[J]. 电气工程学报, 2021, 16(1): 1-8. Cheng Ming, Zhang Bangfu, Wang Sasa, et al.Modular thin yoke linear flux-switching permanent magnet machine and control system[J]. Journal of Electrical Engineering, 2021, 16(1): 1-8. [23] Huang Ziyuan, Fang Jiancheng, Liu Xiquan, et al.Loss calculation and thermal analysis of rotors supported by active magnetic bearings for high-speed permanent-magnet electrical machines[J]. IEEE Transactions on Industrial Electronics, 2016, 63(4): 2027-2035.
2025, Vol. 40 
