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A Robust Speed Controller With VSS Tuning Of Disturbance Cancellation For An Induction Motor Drive |
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| Authors: | CM Liaw KH Chao RS Guo |
| Affiliation: | 1. Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.
Chang-Ming Liaw: (S'88, M'89) was born in Taichung, Taiwan, R.O.C., on June 19, 1951. He received the B.S. degree in electronic engineering from Tamkang College of Arts and Sciences, Taipei, Taiwan, in 1979, and the M.S. and Ph.D. degrees in electrical engineering from National Tsing Hua University, Hsinchu, Taiwan, in 1981 and 1988, respectively. In 1988, he joined the faculty of National Tsing Hua University as an associate professor in electrical engineering. Since 1993, he has been a professor in the Department of Electrical Engineering. His areas of research interest are Power Electronics, Motor Drive and Electric Machine Control. Dr. Liaw is a life member of the CIEE and a member of the IEEE.;2. Department of Electrical Engineering, National Chinyi Institute of Technology, Taichung, Taiwan, R.O.C. Kuei-Hsiang Chao: was born in Tainan, Taiwan, Republic of China, on September 20, 1962. He received the B.S. degree in electrical engineering from National Taiwan Institute of Technology, Taipei, Taiwan, in 1988, and the M.S. and Ph.D. degrees in electrical engineering from National Tsing Hua University, Hsinchu, Taiwan, in 1990 and 2000, respectively. He is presently an Associate Professor at National Chin Yi Institute of Technology, Taichung, Taiwan. His areas of interest are motor drive control, computer-based control systems, and power electronics.;3. Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.O.C. Rong-Shyang Guo: was born in Taiwan, Republic of China, on October 19, 1969. He received the B.S. degree in electrical engineering from National Taiwan Institute of Technology, Taipei, Taiwan, in 1992, and the M.S. degree in electrical engineering from National Tsing Hua University, Hsinchu, Taiwan, in 1999. Since 1999 he has been a Software Engineer at Delta Electronics, Inc., Taiwan. His areas of research interest are ac motor drives, applications of control theory and power electronics. |
| Abstract: | A robust speed controller for an induction motor drive that achieves quantitative control and considers the effects of nonlinearities is presented in this paper. First, a two-degree-of-freedom controller (2DOFC) is designed according to the estimated model for the nominal case and given speed specifications. Then, the control characteristics and limitations of the conventional robust controller are investigated. Accordingly, a modified robust speed controller based on disturbance cancellation is developed, wherein tuning of disturbance cancellation is performed via a variable structure system (VSS) controller. The estimated model mismatched error and its derivative are used as the driven inputs of the VSS controller. Greater robustness and flexibility in achieving a compromise between control effort and control performance can be achieved using the proposed controller. The effectiveness of the proposed controller is demonstrated by simulation and measured results. |
| Keywords: | Induction motor drive robust control variable structure system dead-time compensator |