Analiza krmilnih principov pri večnivojskem kaskadnem pretvorniku

SVETIČIČ, URH (author), Vončina, Danjel (mentor)

Namen te magistrske naloge je bila implementacija algoritmov za delovanje večnivojskega kaskadnega mostičnega pretvornika, napajanega z asimetričnimi enosmernimi viri v programskem jeziku C. Dobljene algoritme smo nato primerjali z algoritmi, ki za delovanje ne potrebujejo asimetričnega napajanja ter naredili analizo, kateri izmed njih je najboljši glede na THD vrednosti izhodne napetosti. Magistrska naloga je sestavljena iz treh delov. Prvi del je namenjen teoretičnemu uvodu, v katerega smo vključili splošno delovanje večnivojskega kaskadnega mostičnega pretvornika. V nadaljevanju smo naredili pregled različnih PWM proženj. Za tem smo si ogledali konkretno zgradbo našega pretvornika ter opisali pomembnejše elemente na vezjih. V drugem delu smo se posvetili implementaciji algoritmov v C kodi ter funkcijam in podprogramom, potrebnim za delovanje kode na krmilniku. V zadnjem delu naloge smo najprej opisali merilne metode ter postopke za izvedbo testov. Zaključili smo z analizo pridobljenih rezultatov in z opisom ugotovitev.

• Language: Slovenian
• Keywords: vgrajeni sistem, Delfino, vecnivojski pretvorniki, H mostic, PWM, THD
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2018
• PID: 20.500.12556/RUL-101753
• Publication date in RUL: 03.07.2018

Secondary language

• Language: English
• Title: Analysis of control principles in multilevel cascaded converter

Abstract

The purpose of this master's thesis is the implementation of algorithms for multilevel cascade H-bridge converter powered by asymmetrical DC voltage sources in the C programming language. The obtained algorithms were compared with the ones that do not need to be asymmetrically powered in order to operate. A detailed analysis was carried out and it shows which algorithm is the best regarding THD values of the output voltage. The thesis consists of three parts. The first part is intended for a theoretical introduction that includes the general operation of multilevel cascade H-bridge converter. It continues with a brief overview of different PWM techniques and afterwards with the presentation of the specific structure of the multilevel converter along with the descriptions of the most vital elements of the system. The second part is intended for the implementation of the algorithms in C code and the descriptions of all functions and subprograms needed for the operation of the code on the microcontroller. The last section of the thesis describes the measuring methods and all testing procedures. The conclusion contains the results analysis and our findings

• Keywords: embedded system, Delfino, H-bridge, multilevel converter, PWM, THD