Hybrid Terminal Sliding-Mode Observer Design Method for a Permanent-Magnet Synchronous Motor Control System

• Published in: IEEE transactions on industrial electronics (1982) Vol. 56; no. 9; pp. 3424 - 3431
• Main Authors: Yong Feng, Yong Feng, Jianfei Zheng, Jianfei Zheng, Xinghuo Yu, Xinghuo Yu, Nguyen Vu Truong, Nguyen Vu Truong
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.09.2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Control systems; Convergence; Derivatives; Design methodology; Equations; Low pass filters; Mathematical analysis; Motor speed control; Observers; permanent-magnet motors; Rotors; Signal design; Sliding mode control; Stability; Synchronous motors; Terminals; Vibration
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2009.2025290

This paper proposes a hybrid terminal sliding-mode observer based on the nonsingular terminal sliding-mode (NTSM) and the high-order sliding-mode (HOSM) for the rotor position and speed estimation in the permanent-magnet synchronous motor control system. An NTSM manifold is utilized to realize both fast convergence and better tracking precision. In addition, a derivative estimator is used to obtain the derivative of the sliding-mode function. Meanwhile, an HOSM control law is designed to guarantee the stability of the observer and eliminate the chattering, so that smooth back-electromotive-force (EMF) signals can be obtained without a low-pass filter. According to the back-EMF equations, the rotor position and speed of the motor can be calculated. Simulation and experimental results are presented to validate the proposed method.