一种优化的双电机主-从模型转矩预测控制策略

doi:10.19595/j.cnki.1000-6753.tces.180978

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摘要

针对转子同轴连接的双电机主-从结构直接转矩控制（DTC）中出现的转矩脉振与主-从电机转矩差问题,提出一种优化的主-从模型转矩预测控制（MS-MPDTC）策略。该策略将模型预测控制引入双电机主-从控制系统中,设计预测电流的差值反馈环节来修正主-从预测转矩以减小稳态转矩差,并增加了随转速变化的反馈权重来抑制动态阶跃前后的转矩差值;同时为了补偿系统自身的延迟现象,在双电机单步预测的基础上进行二步预测,提高转矩的预测精度。仿真与实验结果表明,新的转矩预测控制策略有效抑制了双电机输出转矩脉振与主-从动、稳态转矩差,提升了系统的整体性能。

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	肖雄
	王健翔
	张勇军
	张飞
	郝春晖

关键词 ：双电机, 主-从系统, 模型转矩预测控制, 电流反馈, 转矩差

Abstract：

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.

Key words： Dual motor master-slave system model predictive direct torque control current feedback torque difference

收稿日期: 2018-06-07 出版日期: 2018-12-29

PACS:

TM343

基金资助:

基金项目教育部中央高校基础科研费（FRF-TP-17-045A1）,中国博士后科学基金（2018M631340）面上资助项目

通讯作者: 肖雄男,1989年生,博士后,研究方向为变频调速系统中的非线性控制算法研究与应用。E-mail: docxxiao@ustb.edu.cn

作者简介: 王健翔男,1993年生,硕士研究生,研究方向为新型电机的运行理论及控制。E-mail: wangjianxiang1025@126.com

引用本文:

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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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.180978 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I24/5720

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