Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Robust Sensorless Sliding Mode Flux Observer for DTC-SVM-based Drive with Inverter Nonlinearity Compensation

  • Aimad, Ahriche (Applied Automation Laboratory, Dept. of Automation, University of Boumerdes) ;
  • Madjid, Kidouche (Applied Automation Laboratory, Dept. of Automation, University of Boumerdes) ;
  • Mekhilef, Saad (Power Electronics and Renewable Energy Research Laboratory, Dept. of Electrical Engineering, University of Malaya)
  • Received : 2013.07.26
  • Published : 2014.01.20
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Abstract

This paper presents a robust and speed-sensorless stator flux estimation for induction motor direct torque control. The proposed observer is based on sliding mode approach. Stator electrical equations are used in the rotor orientation reference frame to eliminate the observer dependence on rotor speed. Lyapunov's concept for systems stability is adopted to confine the observer gain. Furthermore, the sensitivity of the observer to parameter mismatch is recovered with an adaptation technique. The nonlinearities of the pulse width modulation voltage source inverter are estimated and compensated to enhance stability at low speeds. Therefore, a new method based on the model reference adaptive system is proposed. Simulation and experimental results are shown to verify the feasibility and effectiveness of the proposed algorithms.

Keywords

References

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