Abstract：In order to solve the problems of high cost and complexity of the open winding permanent magnet synchronous machine (OW-PMSM) system based on the dual-inverter, this paper proposed a novel low-cost four-leg converter for OW-PMSM. On the basis of analysis of the active voltage vectors and corresponding SVPWM strategy for the four-leg converter, the asymmetric distribution rule of the dead-time voltage due to the multiplex bridges was presented for the current distortion analysis. The compensation method of the average dead-time voltage for the proposed system with the separated zero-sequence control scheme was given to suppress the current harmonics. The total harmonics distortion (THD) of the currents could be reduced to 5% or so, and the proposed drive system with the four-leg converter could achieve the same output performance as the OW-PMSM with dual-inverter. Simulations and experiments verify the effectiveness of the dead-time analysis and the proposed suppression strategy.
魏佳丹, 薛嘉成, 周波, 戴胜男, 季建豪. 四桥臂变换器驱动开绕组永磁同步电机系统的死区效应分析与抑制[J]. 电工技术学报, 2018, 33(17): 4078-4090.
Wei Jiadan, Xue Jiacheng, Zhou Bo, Dai Shengnan, Ji Jianhao. Dead-Time Effect Analysis and Suppression for Open-Winding PMSM System with the Four-Leg Converter. Transactions of China Electrotechnical Society, 2018, 33(17): 4078-4090.
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2018, Vol. 33 
