This thesis presents the voltage control of a DC generator and the PI controller in a digital performance.
The aim of diploma thesis is to build a PI controller using LabVIEW software and a myRIO development board. The control system that I have implemented, is used for learning purposes as part of the practical courses of Control engineering course.
The entire system consists of an induction motor, a DC generator and a rectifier (converter). The DC generator is driven by an asynchronous motor, while the excitation winding of the generator takes its power via the rectifier. The task of closed-loop control is to provide a constant voltage of DC generator, independent of the load. This is achieved through the variation excitation flux.
Using the LabVIEW program I have also designed the user interface (front panel), which can be optionally set to adjust parameters of proportional Kp and integral Ki controller. We can enter the reference value of the output voltage of the DC generator. On the user interface (front panel) we can monitor termination of control, the transient occurrence and we can also observe the changing of the excitation voltage.
The results that are presented in the experimental part of the thesis, are showing that detailed closed-loop control analysis is possible through user interface.
The thesis has helped me to become more acquainted with the myRIO development board and also to better understand LabVIEW software as well as of control engineering.
|