Optimal energy reference observer-based torque tracking : a nonlinear feedback control in the /spl alpha//spl beta/ frame

This paper presents, as the main contribution, an observer-based control feedback for the torque tracking of induction motors, conceived in terms of optimal state reference trajectories. This control scheme extends the result of Seleme et al. (1994) by the inclusion of a state observer and by the use of the stationary /spl alpha//spl beta/ frame model for the feedback design. Inherent passivity and dissipativity properties of the model are used.