Robust control of induction motors

In this paper, we present a new approach of sliding mode control of induction motors. The novelty is in the sliding variable formulation. Unlike previous approaches where a linear combination of system states is used, our definition is nonlinear and dynamical and, when system is in sliding mode, an adaptive reference signal is realized which can explicitly counteract mismatched parametric uncertainties. The method is robust to parameter variations and the stability analysis is simple. Full state is needed for implementation. Load torque and rotor resistance can be unknown but bounded