Two Analytical Models Based on Winding Function Theory and Dynamic Reluctance Mesh for Interior Permanent Magnet Traction Machines
Chen Wei1, Wu Guichu1, Fang Youtong2
1. The Key Laboratory of Low-Voltage Apparatus Intellectual Technology of Zhejiang Wenzhou University Wenzhou 325027 China; 2. College of Electrical Engineering Zhejiang University Hangzhou 310027 China
Abstract In the medium-voltage and high-power applications of high-speed trains, low carrier ration synchronous modulation for pulse width modulation (PWM) inverters with low switching frequency results in a dramatic increasement of harmonic losses in permanent magnet traction machines (PMTM). Thus, the simulation of machine performances under sinusoidal excitations can no longer fulfill the requirements of high-performance PMTM overall optimal designs, which must consider the space harmonics from the machine structure as well as the time harmonics from the PWM excitations. Due to its requirement of massive computing resources, the finite element analysis (FEA) can barely meet the needs of rapid and accurate optimal designs. In order to solve these problems, this paper builds two analytical models for interior PMTM based on the winding function theory and the dynamic reluctance mesh. The electro-magnetic performances are analyzed using the analytical models under the no-load operation along with the rated operation with sinusoidal and PWM excitations. The simulation results are verified by the FEA and the experimental tests, and the features of both models are discussed. The conclusions provide theoretical guidance for the analytical calculation of PM traction machines under PWM excitations.
Chen Wei,Wu Guichu,Fang Youtong. Two Analytical Models Based on Winding Function Theory and Dynamic Reluctance Mesh for Interior Permanent Magnet Traction Machines[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 377-386.
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2020, Vol. 35 
