Improved Finite-Control-Set Model Predictive Control With Virtual Vectors for PMSHM Drives

• Published in: IEEE transactions on energy conversion Vol. 37; no. 3; pp. 1885 - 1894
• Main Authors: Sun, Xiaodong, Li, Teng, Yao, Ming, Lei, Gang, Guo, Youguang, Zhu, Jianguo
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.09.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Aerospace electronics; Cost function; duty cycle; Dynamic response; Electric potential; Mathematical models; Model predictive control; Modulation; permanent magnet synchronous hub motor; Permanent magnets; Predictive control; Steady state; Vehicle dynamics; virtual vectors; Voltage; Voltage control
• ISSN: 0885-8969; 1558-0059
• DOI: 10.1109/TEC.2021.3138905

Finite-control-set model predictive current control (FCS-MPCC) always has large steady-state fluctuation and computational burden. In this paper, a novel FCS-MPCC without a modulator to drive permanent magnet synchronous hub motors (PMSHMs), which combines virtual vectors expansion scheme and duty cycle control was proposed. The lack of a modulator reduces the complexity of the control system. The virtual vectors are synthesized by using active vectors, which improve the accuracy of voltage selection, and further improve PMSHM's steady-state performance and reduce current harmonics. The duty cycle control uses a zero vector to obtain better steady-state performance. However, the duty cycle of the virtual vectors is limited by the synthesis method, and further analysis is needed. A new calculation process is proposed to reduce the amount of calculation. The deadbeat principle is used to get reference voltage which determines sectors. Then, the best voltage vector in the selected sector is determined by the predetermined cost function. The traditional MPCC and the duty cycle MPCC (DCMPCC) are used as a comparison item to compare with the proposed method to illustrate its effectiveness. Results confirm that improved MPCC has good steady-state performance while maintaining a fast dynamic response.