Fast Calculation of PM Eddy Current Loss in FCFMPM Machine under PWM VSI Supply Based on CE-FEA and Small-Signal Analysis
Zhu Sa1,2, Lu Zhipeng1, Wang Weidong1, Tian Jian1, Wang Hao1
1. College of Energy and Electrical Engineering Hohai University Nanjing 211100 China; 2. Post-Doctoral Research Center of Daqo Group Co. Ltd Zhenjiang 212211 China
Abstract：In this paper, a method for fast calculating the permanent magnet (PM) eddy current loss (ECL) in a flux-concentrating filed-modulated permanent-magnet (FCFMPM) machine under pulse width modulation (PWM) voltage source inverter (VSI) supply is proposed, which is based on the computationally efficient finite element analysis (CE-FEA), the frequency-domain small-signal analysis, and the analytical ECL model for the cubic PM. The major low-frequency components of the flux density waveform can be constructed with the result obtained form only one-step time-stepping finite element analysis (TSFEA) based on the CE-FEA. Besides, the relationship between PWM harmonic voltages and the flux density variations in the PM can be obtained with four-steps time-harmonic FEA based on the small-signal analysis. Then, the PM ECL can be fast computed with the analytical PM ECL model. The influence of axial segmentation and the eddy current reaction effect have been considered in the proposed method for the PM ECL calculation. Compared with the traditional TSFEA, the calculation speed of the proposed method improves hundreds of times while the relative error of the low-frequency ECL is within 4% and that of the PWM harmonic ECL is limited to 8.4%.
朱洒, 卢智鹏, 王卫东, 田建, 王豪. 基于CE-FEA和小信号分析快速计算逆变器供电下聚磁式场调制电机中永磁体涡流损耗[J]. 电工技术学报, 2020, 35(5): 963-971.
Zhu Sa, Lu Zhipeng, Wang Weidong, Tian Jian, Wang Hao. Fast Calculation of PM Eddy Current Loss in FCFMPM Machine under PWM VSI Supply Based on CE-FEA and Small-Signal Analysis. Transactions of China Electrotechnical Society, 2020, 35(5): 963-971.
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2020, Vol. 35 
