Bezsenzorové řízení asynchronních motorů s využitím Luenbergerova a Gopinathova pozorovatele

Abstract

This thesis deals with the sensorless control of induction drive with observer. An analysis of this topic is presented. The vector control is described as main control structure. A mathematical description of the induction motor and frequency converter are given. Theoretical assumptions for the vector control and especially the sensorless control with speed estimation are given as well. The Luenberger and Gopinath observers are selected as estimators. All theoretical assumptions and functionality are verified in by simulations. A description of the experimental stand is provided. The control structures are implemented to the digital signal processor for verification and tuning of parameters. The correct function of the vector control is verified in simulations and experimental measurements as well. The functionality of the Luenberger and Gopinath observer is proven by simulation and experimental results and their mutual comparison. In conclusion, all obtained results are evaluated and compared with theoretical assumptions.