Research of PMSM-DTC system based on the super-twisting second sliding mode control

• Published in: Journal of Hebei University of Science and Technology
• Main Authors: Suying ZHANG, Heming MA, Zhaojin MO, Linjing LI, Huixian LIU
• Format: Article
• Language: Chinese
• Published: Hebei University of Science and Technology 2017-04-01
• Subjects: robust control; PMSM; second order sliding mode; super-twisting sliding mode algorithm; torque ripple; robustness
• Online Access: http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201702012&flag=1&journal_

Aiming at the problems that the conventional permanent magnet synchronous motor direct torque control system (PMSM-DTC) is susceptible to the influence of parameter change and torque ripple, it is proposed that the space voltage vector modulation technique (SVPWM) is used instead of the traditional sinusoidal pulse width modulation (SPWM), on the basis of which the second-order sliding mode variable structure control rate with super-twising algorithm is introduced, with the stator flux linkage and torque as the controlled object to design the controller instead of traditional PI controller in the system. The simulation results show that the strategy not only eliminates effectively the first-order sliding mode chattering problems, significantly reducing the stator flux linkage and torque ripple, but also has strong ability of speed tracking, with robustness to load disturbance, and parameter changes, etc., therefore can be well applied in motor control.