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Sensorless Control of Induction Motor Drives Using an Improved MRAS Observer

  • Kandoussi, Zineb (Laboratory of Electrical Engineering and Control Systems, Cadi Ayyad University) ;
  • Boulghasoul, Zakaria (Laboratory of Electrical Engineering and COntrol Systems, Cadi Ayyad University) ;
  • Elbacha, Abdelhadi (Laboratory of Electrical Engineering and COntrol Systems, Cadi Ayyad University) ;
  • Tajer, Abdelouahed (Laboratory of Electrical Engineering and COntrol Systems, Cadi Ayyad University)
  • Received : 2016.02.25
  • Accepted : 2017.01.28
  • Published : 2017.07.01

Abstract

This paper presents sensorless vector control of induction motor drives with an improved model reference adaptive system observer for rotor speed estimation and parameters identification from measured stator currents, stator voltages and estimated rotor fluxes. The aim of the proposed sensorless control method is to compensate simultaneously stator resistance and rotor time constant variations which are subject of large changes during operation. PI controllers have been used in the model reference adaptive system adaptation mechanism and in the closed loops of speed and currents regulation. The stability of the proposed observer is proved by the Lyapunov's theorem and its feasibility is verified by experimentation. The experimental results are obtained with an 1 kW induction motor using Matlab/Simulink and a dSPACE system with DS1104 controller board showing the effectiveness of the proposed approach in terms of dynamic performance.

Keywords

References

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