Abstract
In order to effectively achieve torque demand in electric vehicles (EVs), this paper presents a torque control strategy based on model predictive control (MPC) for permanent magnet synchronous motor (PMSM) driven by a two-level three-phase inverter. A centralized control strategy is established in the MPC framework to track the torque demand and reduce energy loss, by directly optimizing the switch states of inverter. To fast determine the optimal control sequence in predictive process, a searching tree is built to look for optimal inputs by dynamic programming (DP) algorithm on the basis of the principle of optimality. Then we design a pruning method to check the candidate inputs that can enter the next predictive loop in order to decrease the computational burden of evaluation of input sequences. Finally, the simulation results on different conditions indicate that the proposed strategy can achieve a tradeoff between control performance and computational efficiency.
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This work was supported by the NSFC Projects of International Cooperation and Exchanges (No. 61520106008), the National Natural Science Foundation of China (Nos. 61503149, U1564207) and the Graduate Innovation Fund of Jilin University (No. 2016093).
Bingtao REN received the B.Sc. degree in Automation from Jilin University, Changchun, China, in 2012, where he is currently working toward the Ph.D. degree in Control Theory and Control Engineering. His current research interests include torque coordination optimization and motor control of electric vehicles.
Hong CHEN received the B.Sc. and M.Sc. degrees in Process Control from Zhejiang University, Zhejiang, China, in 1983 and 1986, respectively, and the Ph.D. degree in System Dynamics and Control Engineering from the University of Stuttgart, Stuttgart, Germany, in 1997. Since 1999, she has been a Professor in Jilin University, Changchun, China, where she currently serves as Tang Aoqing Professor and as the Director of the State Key Laboratory of Automotive Simulation and Control. Her current research interests include model predictive control, optimal and robust control, nonlinear control and applications in mechatronic systems focusing on automotive systems.
Haiyan ZHAO received the B.Sc. degree in Automation, the M.Sc. and Ph.D. degree in Control Theory and Control Engineering from Jilin University, Changchun, China, in 1998, 2004 and 2007, respectively. Since 2007, she has been a lecturer in Jilin University, Changchun, China. Her current research interests include vehicle stability control and state estimation of electric vehicles.
Wei XU received the B.Sc. degree in Automation from Harbin University of Science and Technology, Harbin, China, in 2010, and received the M.Sc. degree in Pattern Recognition and Intelligent System from Jilin University, Changchun, China, in 2015, where she is currently working toward the Ph.D. degree in Control Theory and Control Engineering. Her current research focuses on regenerative braking system of electric vehicles.
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Ren, B., Chen, H., Zhao, H. et al. MPC-based torque control of permanent magnet synchronous motor for electric vehicles via switching optimization. Control Theory Technol. 15, 138–149 (2017). https://doi.org/10.1007/s11768-017-6193-z
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DOI: https://doi.org/10.1007/s11768-017-6193-z