Sensorless control of induction motors with exponential stability property

In this paper a sensorless controller for induction motor is presented. It provides local exponential stability properties with an explicit estimation of the convergence domain since Lyapunov direct method is adopted in the design/investigation process. Full-order model of the induction motor is considered and no simplifying assumptions on the speed dynamics (as negligibility of the speed time-derivative) are introduced. The load torque is assumed constant but unknown. Simulation results are provided.