A Luenberger-sliding mode observer with rotor time constant parameter estimation in induction motor drives

The performance and efficiency of an induction motor drive system can be enhanced by online estimation of critical parameters such as rotor time constant. A novel Luenberger-sliding mode observer with a parameter adaptation algorithm is proposed in this paper to compensate for the parameter variation effects. The observer is comparably simple and robust relative to the previously developed observers, and yet suitable for online implementation. Simulation studies for the proposed method were conducted in a MATLAB environment. Observer constants and the control parameters were tuned during the simulation studies and used during the experimental study stage. Experimental verification of the developed algorithm was performed with an induction motor using the rotor flux-oriented vector control. The comparative results and related overall conclusions are presented accordingly.

Anahtar Kelimeler:

Induction motor, sensorless speed control, motor drive, parameter estimation, observer

A Luenberger-sliding mode observer with rotor time constant parameter estimation in induction motor drives

Keywords:

Induction motor, sensorless speed control, motor drive, parameter estimation, observer,

PDF

___

Entries of the observer gain matrix are constituted with constant values. These entries can take diﬀerent values for diﬀerent speed regions. As part of further investigation, the authors propose using neural network, fuzzy-neural, or genetic algorithms in order to determine gain matrix coeﬃcients as a better solution to the sensorless control problem.
K. Hasse, “Zum Dynamischen Verhalten der Asynchronmachine bei Betrieb mit variable Standerfrequenz und Standerspannung,” ETZ-A, Bd. 89, H. 4, pp. 77-81, 1968.
F. Blaschke, “Das Prizip der Feldorientierung, Die Grundlage fur die TRNSVEKTOR-Regelung von Asynchnma- chinen,” Siemens Zeitschrift, Vol. 45, p. 757, 1971.
R. Joetten, G. Maeder, “Control methods for good dynamic performance induction motor drives based on current and voltage as measured quantities”, IEEE Trans. on Ind. Appl., Vol. 19, pp. 356-363, 1983.
S. Sangwongwanic, S. Doki, T. Yonemoto, S. Okuma, “Adaptive sliding observer for direct Şeld-oriented control of induction motors”, Int. Conf. on Ind. Elec. Cont. and Instr., IECON’90, pp. 915-920, 1990.
M.A. Brdys, T. Du, “Algorithms for joint state and parameter estimation in induction motor drive systems”, International Conference on Control ’91, Vol. 2, pp. 915-920, 1991.
P. Vas, A.F. Stronach, M. Neuroth, “A fuzzy-controlled speed-sensorless induction motor drive with ﬂux estimators”, 7th International Conference on Electrical Machines and Drives, pp. 315-319, 1995.
M. Abrate, G. Griva, F. Profumo, A. Tenconi, “High speed sensorless fuzzy-like Luenberger observer”, 30th Annual IEEE Power Electronics Specialists Conference, PESC 99, Vol. 1, pp. 477-481, 1999.
K.B. Lee, J.Y. Yoo, J.H. Song, I. Choy, “Improvement of low speed operation of electric machine with an inertia identiŞcation using ROELO”, Electric Power Applications, IEE Proceedings, Vol. 151, pp. 116-120, 2004.
M.A. Valenzuela, J.A. Tapia, J.A. Rooks, “Thermal evaluation of TEFC induction motors operating on frequency- controlled variable-speed drives”, IEEE Trans. Ind. Appl., Vol. 40, pp. 692-698, 2004.
T.H. Bishop, “Temperature monitoring is key to motor reliability”, Maint. Technol. Mag., p. 34, 2004.
A.K. Pradeep, J.P. Lyons, S.R. MacMinn, “Application of sliding mode observer for state estimation in rotating machines”, Proc. VARSCON’91, pp. 57-64, 1991.
P.L. Jansen, C.O. Thompson, R.D. Lorenz, “Observer-based direct Şeld orientation for both zero and very high speed operation”, Proc. of Power Conv. Conf., PCC Yokohama, pp. 432-437, 1993.
F. Alogne, T. Raimondi, “Indirect adaptive speed control of induction motor systems based on model reference identiŞers”, Proc. IECON’93, Vol. 2, pp. 1035-1040, 1995.
M.G. Aydeniz, I. Senol, “A novel approach to sensorless control of induction motors”, ELECO 2009, 6th Interna- tional Conference on Electrical and Electronics Engineering, Vol. 1, pp. 179-184, 2009.