HIGH GAIN FLUX OBSERVER FOR FIELD-ORIENTED CONTROL OF AN INDUCTION MOTOR

Abstract

This paper deals with the observation and the field oriented control (FOC) of an induction motor (IM). A high gain flux observer is associated in order to estimate the rotor flux assuming the mechanical and stator currents are measured. A robustness tests are carried out by parametric variation in the proposed observer. To valid the observer, an experiment has been set up, dSPACE card based on a Numeric-intensive Texas Instrument TMS320C31 floating point DSP is used. With an aim to establish a comparison between the theoretical and experimental results, the numerical simulation conditions are taken the same as those of the experiment. Simulation and experimental curves are presented to show the performance of a high gain flux observer in IM drive system.