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Modeling and Control for Open-Winding PMSM Under Open-Phase Fault Based on New Coordinate Transformations
IEEE Transactions on Power Electronics ( IF 6.7 ) Pub Date : 2020-11-23 , DOI: 10.1109/tpel.2020.3039896
Wenhan Chen , Dan Sun , Mingze Wang , Heng Nian

In the open-winding permanent magnet synchronous motor (OW-PMSM) system fed by dual inverter with common dc bus, suitable control strategy should be adopted to suppress the torque ripple generated by the third harmonic flux and 0-axis current. However, the mathematical model will change when the motor is under open-phase fault so that the coordinate transformations and control strategy should be redesigned accordingly in order to suppress the torque ripple. In this article, the postfault OW-PMSM system is remodeled considering the third harmonic flux. Based on the postfault model, new coordinate transformations are designed to obtain a concise torque and decoupling voltage expressions for the simple and accurate control of torque. Moreover, the torque ripple is suppressed by modifying the current reference. In addition, a simple decoupling modulation is designed to directly obtain the switching signals for the dual inverter. Experimental results confirm the effectiveness of the proposed fault-tolerant control strategy.

中文翻译:

基于新坐标变换的开相故障下永磁永磁同步电动机的建模与控制

在由具有公共直流母线的双逆变器供电的开卷式永磁同步电动机(OW-PMSM)系统中,应采用适当的控制策略来抑制由三次谐波磁通和0轴电流产生的转矩脉动。但是,当电动机处于缺相故障时,数学模型将发生变化,因此应相应地重新设计坐标变换和控制策略,以抑制转矩波动。在本文中,考虑了三次谐波通量对故障后的OW-PMSM系统进行了重构。基于故障后模型,可以设计新的坐标变换来获得简明的转矩和去耦电压表达式,以便简单,准确地控制转矩。此外,通过修改电流基准可以抑制转矩波动。此外,一个简单的去耦调制被设计为直接获得双逆变器的开关信号。实验结果证实了所提出的容错控制策略的有效性。
更新日期:2020-11-23
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