Electromagnetic Optimization Design of Compound-Structure Permanent-Magnet Motor for Hybrid Electric Vehicle
Xu Qiwei1, Sun Jing1, Yang Yun1, Tao Teyi1, Cui Shumei2
1. The State Key Laboratory of Power Transmission Equipment & System Security and New TechnologyChongqing University Chongqing 400044 China; 2. School of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 China
Abstract The electromagnetic structure of compound-structure permanent-magnet(CSPM) motor for hybrid electric vehicle (HEV) was optimized in this paper to reduce the torque ripple caused by the nonlinear variation of the magnetic circuit parameters, then the running stability of HEV would be improved. Firstly, the structure and typical work mode of HEV based on CSPM motor were introduced. Next, the state equation of CSPM motor under three-phase stationary coordinate system was established to study the torque characteristic of it. Then, the electromagnetic structure of CSPM motor was optimized using finite element method (FEM) to reduce the coupling degree between the internal and external magnetic fields, then reduce the torque ripple. Finally, the motor model is established based on the selected parameters, and the rationality of the electromagnetic optimization design is verified by comparing the electromagnetic performance of CSPM motor before and after optimization. The direction for further research is pointed out according to the flux linkage of CSPM motor.
Xu Qiwei,Sun Jing,Yang Yun等. Electromagnetic Optimization Design of Compound-Structure Permanent-Magnet Motor for Hybrid Electric Vehicle[J]. Transactions of China Electrotechnical Society, 2020, 35(zk1): 126-135.
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2020, Vol. 35 
