Application of the proportional observer with additional integrators to reconstruction of induction motor state variables

Abstract

In the paper there are presented some problems connected with reconstruction of induction motor state variables with use of a proportional observer with additional integrators. The considered Luenberger observer with additional integrators has high resistance to disturbances overlapping its input signals. In the paper the mathematical model and error equation of the observer are given. There is also described the application of the considered observer as an adaptive model in the structure of a MRAS-type estimator for reconstruction of rotational speed and magnetic fluxes of an induction motor. The quality of the observer operation is evaluated based on the quality of operation of a multiscalar control system using the values reconstructed by the observer as feedback signals