Abstract：In high power traction drive system, traction motor usually operates under square wave mode in the field-weakening area. The traditional vector control under the square wave mode is limited by the single control freedom degree. Meanwhile, accurate field orientation is affected by the rotor time constant. Therefore, the accurate field-oriented control under the square wave mode is the key to the high performance control of the traction motor in the field-weakening area. This paper proposes a single current loop control strategy for the square wave mode. Q-axis voltage is calculated from the d-axis voltage and the maximum output voltage of inverter. The influence of the motor parameters on the output torque, flux linkage, current and voltage of the square wave mode is deduced by the motor equation, and then the parameter robustness of the proposed control strategy is analyzed. The simulation and experimental results show that the proposed method can realize the fast and precise control of the motor current, and accurate field orientation can be achieved to ensure that the motor outputs the desired torque.
李华, 方晓春, 林飞, 杨中平, 朱龙胜. 异步牵引电机方波单电流闭环控制策略及其参数鲁棒性分析[J]. 电工技术学报, 2018, 33(9): 2034-2043.
Li Hua, Fang Xiaochun, Lin Fei, Yang Zhongping, Zhu Longsheng. Singles Current Loop Control Strategy of Induction Traction Motor in Square Wave Mode and Its Parameter Robustness Analysis. Transactions of China Electrotechnical Society, 2018, 33(9): 2034-2043.
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2018, Vol. 33 
