Thesis (MScIng)--University of Stellenbosch, 2004. / ENGLISH ABSTRACT: The thesis discusses the analysis and design of a three-phase-to-three-phase direct
AC-AC matrix converter. A background study of the various matrix converter topologies
and their modulation strategies are presented. The associated PWM strategy of each
matrix converter topology is investigated. In addition, a detailed explanation of the three
safe commutation strategies is presented.
The research focuses on the design and analysis of the direct AC-AC matrix converter
topology. That includes the design of the main bi-directional power converter circuit,
gate drive circuit, current direction detection circuit, voltage measurement circuit and
protection circuitry. Moreover, it covers the development of the direct control algorithm
based on the four-step safe current commutation- and the two-step voltage
commutation strategy. A “PEC33” controller board is used to implement the developed
control algorithm. Furthermore, simulation results of the direct and the indirect matrix
converter topologies are presented.
The results obtained from the experimental test performed on the direct AC-AC matrix
converter topology are also presented. The conclusion drawn is discussed at the final
stage of the report. / AFRIKAANSE OPSOMMING: Hierdie tesis bevat die analise en ontwerp van ‘n drie-fase na drie-fase direkte WS-WS
matriksomsetter. ‘n Agtergrondstudie van verskeie ander matriksomsetter topologieë
word aangebied. Die ge-assosieerde PWM beheerstrategie van elke matriksomsetter
topologie is ondersoek. Hierby word ‘n gedetaileerde verduideliking van drie veilige
kommutasie strategieë ingesluit.
Die navorsing fokus op die ontwerp en analise van die direkte WS-WS matriksomsetter
topologie. Dit sluit die volgende in: die ontwerp van die hoof bi-direksionele
drywingsomsetterbaan; die hek aandryfbaan; die stroomrigting deteksiebaan; die
spanningsmeetbaan en die beveiliging stroombane. Dit dek ook die ontwikkeling van die
direkte beheeralgoritme wat gebasseer is op die vier-stap veilige stroomkommutasie- en
die twee-stap spanningskommutasie strategie. ‘n “PEC33” beheerkaart is gebruik om
hierdie beheeralgoritme te implementer. Simulasie resultate van beide die direkte sowel
as die indirekte matriksomsetter topologieë word ingesluit.
Die eksperimentele resultate wat met die direkte WS-WS matriksomsetter topologie
verkry is word aangebied en bespreek. Die gevolgtrekking word in die finale afdeling
van die verslag bespreek.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/16324 |
| Date | 12 1900 |
| Creators | Gebrehiwet Gebregergis, Abraham |
| Contributors | Mouton, H. du T., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | xxi, 153 leaves : ill. |
| Rights | University of Stellenbosch |
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