Aiming at the torque rippling and torque difference in the direct torque control (DTC) for the master-slave structure of the rotor-coaxial dual motor, this paper provides an optimized master-slave model predictive direct torque control (MS-MPDTC) scheme for the dual motor. This scheme introduces the model predictive control into the master-slave control system and designs a feedback loop of the predicted current to fix the master-slave predicted torque for torque difference reduction in the steady state. It also adds a feedback weight varied with the rotating speed to suppress the change of torque change difference before and after the dynamic stepping. Meanwhile, to compensate the delay generated by the system itself, a two-step prediction is implemented based on the one-step prediction for the dual motor, which further improves the prediction precision. The simulation and experimental results show that, the new torque predictive control effectively suppresses the torque rippling and master-slave torque differences in both steady and dynamic states for the dual motor, which improves the system performance.
肖雄, 王健翔, 张勇军, 张飞, 郝春晖. 一种优化的双电机主-从模型转矩预测控制策略[J]. 电工技术学报, 2018, 33(24): 5720-5730.
Xiao Xiong, Wang Jianxiang, Zhang Yongjun, Zhang Fei, Hao Chunhui. An Optimized Master-Slave Model Predictive Direct Torque Control Scheme for the Dual Motor. Transactions of China Electrotechnical Society, 2018, 33(24): 5720-5730.
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2018, Vol. 33 
