FPGA-Based Sliding-Mode Predictive Control for PMSM Speed Regulation System Using an Adaptive Ultralocal Model

• Published in: IEEE transactions on power electronics Vol. 36; no. 5; pp. 5784 - 5793
• Main Authors: He, Long, Wang, Fengxiang, Ke, Dongliang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptation models; Adaptive control; Algorithms; Cost function; Discrete-time integral sliding-mode observer; Field programmable gate arrays; forgetting factor recursive least squares (FFRLS); Integrals; Load modeling; model-based predictive speed control; Observers; Permanent magnets; permanent-magnet synchronous machine; Predictive control; Predictive models; Rotor speed; Rotors; Sliding mode control; Speed control; Synchronous motors; Torque
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2020.3028545

An adaptive ultralocal surface-mounted permanent-magnet synchronous motor (SPMSM)-model-based continuous control set sliding-mode predictive speed control (UL-MPSC) is proposed in this article to promote the performance of conventional continuous control set model-based predictive speed control (CCS-MPSC). First, an ultralocal SPMSM model that represents the lumped disturbance as the sum of rotor speed, and <inline-formula><tex-math notation="LaTeX">q</tex-math></inline-formula>-axis current is provided. A forgetting factor recursive least squares identification technique is utilized to identify the coefficients of the rotor speed, and <inline-formula><tex-math notation="LaTeX">q</tex-math></inline-formula>-axis current, simultaneously. Consequently, the ultralocal SPMSM model is updated at each sampling time, according to I/O data. Second, unlike the error-prediction-based cost function, a fast terminal sliding-mode-based cost function is designed by applying a linear sliding-mode surface, and a fast terminal reaching law. Finally, a discrete-time integral sliding-mode predictive observer is developed to realize a one-step prediction of the reference speed, which is fed forward to the predefined cost function. Experiments of the minimum controller synthesis algorithm, discrete-time integral sliding-mode load torque observer-based CCS-MPSC, and UL-MPSC have been carried out on a field-programmable gate array-based hardware prototype, and the experimental results validate the excellent performance of the UL-MPSC strategy.