Modified Super-Twisting Algorithm with an Anti-Windup Coefficient Adopted in PMSM Speed Loop Control

• Published in: Energy procedia 2019-02, Vol.158, p.2637-2642
• Main Authors: Yiguang, Chen, Chenghan, Lin, Zhenmao, Bao, Xiaobin, Zhao
• Format: Article
• Language: English
• Subjects: anti-windup coefficient; electric vehicle; modified super-twisting; PMSM; speed control
• ISSN: 1876-6102; 1876-6102
• DOI: 10.1016/j.egypro.2019.02.015

Permanent magnetic synchronous motors (PMSMs) have been widely used in many fields such as ship industry, aerospace industry, and electric locomotives, and it is also suitable for electric vehicles (EVs) as driving motors. Conventional proportional- integral (PI) control method is sensitive to perturbation when it is used to control the PMSM speed loop. The modified super-twisting (MST) algorithm is a continuous second order sliding mode algorithm, which can not only have strong robustness but also reduce chattering, and it can converge within finite time even in the condition of time-varying disturbance. The MST algorithm is introduced to enhance the disturbance rejection performance of the PMSM speed loop. Then, the control law for the speed loop is derived. An anti-windup coefficient is proposed to the MST algorithm to reduce the overshoot resulting from the MST algorithm. It is proved from the simulation results that the MST algorithm has a good performance of the disturbance rejection when adopted in the speed loop, and the proposed anti-windup coefficient can reduce the overshoot well for different speeds within rated rotational speed. The strategy can meet the requirement of complicated operating conditions of EVs well.