Nonlinear Control of an Induction Motor Using a Reduced-Order Extended Sliding Mode Observer for Rotor Flux and Speed Sensorless Estimation


This article proposes an innovative strategy to the problem of non-linear estimation of states for electrical machine systems. This method allows the estimation of variables that are difficult to access or that are simply impossible to measure. Thus, as compared with a full-order sliding mode observer, in order to reduce the execution time of the estimation, a reduced-order discrete-time Extended sliding mode observer is proposed for on-line estimation of rotor flux, speed and rotor resistance in an induction motor using a robust feedback linearization control. Simulations results on Matlab-Simulink environment for a 1.8 kW induction motor are presented to prove the effectiveness and high robustness of the proposed nonlinear control and observer against modeling uncertainty and measurement noise.

Share and Cite:

O. Asseu, M. Kouacou, T. Ori, Z. Yéo, M. Koffi and X. Lin-Shi, "Nonlinear Control of an Induction Motor Using a Reduced-Order Extended Sliding Mode Observer for Rotor Flux and Speed Sensorless Estimation," Engineering, Vol. 2 No. 10, 2010, pp. 813-819. doi: 10.4236/eng.2010.210104.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] D. I. Krein, I. J. Ha and M. S. Ko, “Control of Induction Motors via Feedback Linearization with Input-Output Decoupling,” International Journal of Control, Vol. 51, No. 4, 1989, p. 863-883.
[2] K. B. Mohanty, N. K. De and A. Routray, “Sensorless Control of a Linearized and Decoupled Induction Motor Drive,” National Power Systems Conference, NPSC, Kharagpur, India, December 2002, pp. 46-49.
[3] R. Yazdanpanah, J. Soltani and G. R. A. Markadeh, “Nonlinear Torque and Stator Flux Controller for Induction Motor Drive Based on Adaptive Input-Output Feedback Linearization and Sliding Mode Con-trol,” Energy Conversion and management, Vol. 49, No. 4, 2008, pp. 541-550.
[4] P. A. Bogdan and A. Keyhani, “Slid-ing-Mode Flux Observer with Online Rotor Parameter Estimation for Induction Motors,” IEEE Transactions on Industrial Electronics, Vol. 54, No. 2, April 2007, pp. 716-723.
[5] A. Derdiyok, “Speed-Sensorless Control of Induction Motor Using a Continuous Control Approach of Sliding-Mode and Flux Observer,” IEEE Transactions on Industrial Electronics, Vol. 52, No. 4, August 2005, pp. 1170-1176.
[6] D. F. Bernard and L. Jean-Paul, “Identification et observation des actionneurs électriques,” Vol. 1 & 2, Hermes, Paris, 2007.
[7] O. Asseu, Z. Yeo, M. Koffi, X. Lin-Shi, C. T. Haba and G. L. Loum, “Robust Decoupling Control and Ex-tended Sliding Mode Observer for an Induction Motor,” News -Phys Chem, Vol. 48, July 2009, pp. 1-8.
[8] J. C. Doyle, B. A. Francis and A. R. Tannenbaum, “Feedback Control Theory,” Maxwell MacMillan Internat, New York, 1992.
[9] M. Tursini, R. Petrella and F. Parasiliti, “Adaptive Sliding Mode Observer for Speed Sensorless Control of Induction Motors,” IEEE Transactions on Industry Applications, Vol. 36, No. 5, September/October 2000, pp. 1380 -1387.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.