Demonstracijski model digitalne regulacije napetosti enosmernega generatorja

VUKOBRAT, DARKO (author), Nedeljković, David (mentor)

V diplomskem delu je predstavljena digitalna izvedba regulacije napetosti enosmernega generatorja s PI regulatorjem. Cilj naloge je izdelava PI regulatorja s pomočjo programske opreme LabVIEW in myRIO razvojne plošče. Regulacija oziroma sistem, ki sem ga uporabil, se uporablja v učne namene na laboratorijskih vajah pri predmetu Regulacijska tehnika. Celoten sistem sestavljajo asinhronski motor, enosmerni generator in krmiljeni (PWM) mostični pretvornik (usmernik). Asinhronski motor poganja enosmerni generator, medtem ko se vzbujalno navitje generatorja napaja iz krmiljenega mostičnega pretvornika - močnostnega ojačevalnika. Naloga regulacije je zagotavljati konstantno napetost indukta, neodvisno od obremenitve. To je doseženo preko spreminjanja vzbujalnega fluksa. S pomočjo LabVIEW programa je izdelan uporabniški vmesnik (čelna plošča), kjer lahko po želji nastavljamo parameter proporcionalnega ojačenja Kp in parameter integralskega dela regulatorja Ki. Poljubno lahko vnesemo želeno vrednost izhodne napetosti enosmernega generatorja. Na uporabniškem vmesniku (čelni plošči) lahko spremljamo potek regulacije, prehodni pojav, vidimo pa tudi spreminjanje vzbujalne napetosti. Rezultati, ki so predstavljeni v eksperimentalnem delu, prikazujejo, da je preko uporabniškega vmesnika možna tudi podrobnejša analiza regulacije. Diplomska naloga mi je pripomogla, da sem se spoznal z myRIO razvojno opremo, programsko opremo LabVIEW in tudi k boljšemu razumevanju regulacij.

• Language: Slovenian
• Keywords: regulacija, PI regulator, LabVIEW, myRIO
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-95132
• Publication date in RUL: 15.09.2017

Secondary language

• Language: English
• Title: Demonstration model for digital control of the DC generator voltage

Abstract

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.

• Keywords: closed loop control, PI controller, LabVIEW, myRIO