A study on direct vector control system for induction motor speed control

Abstract

In this thesis, in order to improve driving characteristics of vector control of an induction motor that is used in motors and elevators, a highly-precise method for flux observation has been exercised by using an algorism of flux observer based on the combined voltage and current model. And it also emphasizes the improvement of the control characteristics in low speed region where established schemes have many problems. The overall system consisted of speed controller with the Anti-windup PI controller, current controller, flux controller. And 2DOF is applied to induction motor in order to supply these weak points of PI speed control method in this paper. To prove the propriety of this paper, the various simulations carried out adequacy and stability using Matlab, and at the same time real system is made, so it is proved. As the results of embodying the system, the robust system is realized. © 2012 Springer Science+Business Media.