Sliding Mode Current Control with Luenberger Observer applied to a Three Phase Induction Motor

Abstract

In this paper, the problem of controlling three-phase induction motors with unmeasurable states is tackled. To that end, a finite-time robust nonlinear current control is applied. The controller employed is the first order sliding mode with exponential reaching law variant. Moreover, in order to estimate some variables that are not measurable, such as the rotor current, a state observer based on Luenberger observer is implemented. Simulation results show a good tracking of the desired reference, given that there exist some dynamics which were not modeled and there are fast changes in the reference.