Robust Control of Induction Motor Drive Facing a Large Scale Rotor Resistance Variation

Abstract

The vector control of induction motors provides a high performance independent control of torque and flux in similar way to the separate excitation DC machine. Nevertheless, the main disadvantages of this control type is the sensitivity to the machine parameters variation, like the stator and the rotor resistances. To avoid a such problematic, a high robust sliding mode controllers against uncertainties are replaced the classical PI controllers. This research presents an induction motor robust control facing a sudden rotor resistance variation at very low speed, the rotor flux and speed are observed by an extended Kalman filter. Simulation results show that the proposed control provide good performance dynamic characteristics under a large scale rotor resistance variation. All simulations have been realized in MATLAB/Simulink.