Simulace přímého řízení momentu asynchronního motoru

Abstract

The theme of this diploma thesis is simulation of the direct torque control of induction motor. This motor is supplied by an indirect frequency converter with DC voltage link. In this thesis are mentioned the possibilities of the control of the induction motor speed. There is also explained the principle of direct control of torque and stator magnetic flux in more detail and methods of this control. This thesis is focused mainly on the Takahashi method and the method with PWM modulator. These two methods are used in the speed regulation simulation model. The simulation model is built in Matlab Simulink software. Version of software is R2014b. There in this model are the time courses of important quantities in various areas of speed (low, medium, high – de-excitation area) there. This thesis deals with the effect of using of excitation subroutine. Subroutine is used for decrease of the stator current. The simulated results presents the expected properties of the induction motor.