Robust flux observer system with sliding mode field oriented control of induction motors

This paper implements a new observer model in parallel with a sliding mode concept for a field oriented control drive system. The proposed system accounts for the problem of stator resistance variation. The use of feedback correction on the output of the observer eliminates the effect of stator resistance and makes the new observer robust in terms of motor parameter variation. A comparison between the outputs of a sliding mode based drive system and one without is presented. Simulation results using Matlab/Simulink are carried out.