Bezsensorové řízení asynchronního motoru s využitím injekční metody

Abstract

The main essence of this master thesis is an analysis of induction motor control in a modern way, which means with the use of sensorless control of the induction motor with application the injection method. The content of this work is a creation of simulation models of sensorless control with injecting a voltage signal, which is attached to the basic feeding voltage. The injecting takes places at the stator system coordinate [alpha, beta]. The main aim is the use of this modern method of control for estimation mechanical angular speed and all that without the application of a speed sensor or more precisely, the mechanical angular speed. In the first part of this thesis, there is a description of the induction motor itself, its construction and description of the functioning and control. Another part is dedicated to control with the use of sensorless method with an application of a mathematic model of a machine. Finally, in the main part of this project can be found the analysis of individual types of injecting methods. This method is followed by the injection method with injecting the voltage signal which has been mentioned above. The next chapters are dedicated to verification of models and the results, which have been reported when the sensorless control with the injection method was being implemented. For the purpose of this simulation, a model of field-orientation control of the induction motor was used. Such a model was adjusted for sensorless control by using the signal of injecting. Computer simulation was done by using the programme called Matlab-Simulink. The results of testing this sensorless control with the use of injection method can be found in the final part of this thesis.