CJEE

Chinese Journal of Electrical Engineering ›› 2022, Vol. 8 ›› Issue (3): 133-141.doi: 10.23919/CJEE.2022.000032

• Regular Papers • Previous Articles    

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Improved Optimal Duty Model Predictive Current Control Strategy for PMSM*

Dingdou Wen, Jie Yuan, Yang Zhang*, Chuandong Shi   

  1. School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China
  • Received:2021-02-22 Revised:2021-05-23 Accepted:2021-06-29 Online:2022-09-25 Published:2022-10-21
  • Contact: * E-mail: hut_zy@163.com
  • About author:Dingdou Wen received the B.S. degree in Automation from Nanjing Tech. University, Nanjing, China, in 1993, the M.S. degree in Control Theory and Control Engineering from Central South University, Changsha, in 2007. He has been with Hunan University of Technology, he is currently a Professor of Automatic Control Engineering. His current research interests are permanent magnet synchronous motor speed control.
    Jie Yuan, master’s degree student of Hunan University of Technology, mainly researching power electronics and electric drive.
    Yang Zhang received his B.S. degree in Applied Physics and his M.S. degree in Electrical Engineering from Hunan University of Technology, Zhuzhou, China. He received his Ph.D. degree in Electrical Engineering from Hunan University, Hunan, China, in 2017. He is currently an Assistant Professor in Hunan University of Technology. His current research interests include wind power generation system and impedance-source converters.
    Chuandong Shi, master’s degree student of Hunan University of Technology, mainly researching power electronics and electric drive.
  • Supported by:
    * National Natural Science Foundation of China (51907061), Natural Science Foundation of Hunan Province(2019JJ50119) and National Engineering Laboratory of UHV Engineering Technology (Kunming, Guangzhou)(NEL202008).

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Abstract: To further improve the steady-state performance of the conventional dual vector model predictive current control (MPCC), an improved optimal duty MPCC strategy for permanent magnet synchronous motor (PMSM) is proposed. This strategy is realized by selecting an optimal voltage vector combination and its duration from the five basic voltage vector combinations, followed by acting on the inverter. The five combinations are: the combination of the optimal voltage vector at the previous moment and basic voltage vector with an angle difference of 60°; the combination of the optimal voltage vector at the previous moment and basic voltage vector with an angle difference of -60°; the combination of the aforementioned three basic voltage vectors with the zero vector. Experimental results indicate that the method effectively reduces the stator current ripple without increasing the calculational burden. Furthermore, it improves the steady-state performance of the system without altering the dynamic performance of the system.

Key words: Model predictive current control, improved optimal duty, optimal voltage vector combination, steady-state performance, PMSM