Sliding mode control based on field orientation for an induction motor

Sliding mode control is popular method for achieving robust tracking of nonlinear systems. The state is forced onto a manifold in state space by discontinuous control. This manifold is so that staying on it implies convergence to the state space origin. In this paper, the nonlinear sliding mode speed and flux control (SMC) based on field orientation for an induction motor drive is proposed, based on the transformed state coordinate representing the speed and flux magnitude dynamic. With the proposed control of speed and flux amplitude, the controlled induction motor drive possesses the advantages of robustness to parametric uncertainties and disturbances. Finally, some simulation results are given to validate the proposed controllers.