Multilevel converters

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Until recently the vast majority of power electronic applications have been to low voltage systems. However, developments in high voltage semiconductor switches in the last decade have generated significant activity in high voltage power electronic applications. Traditional two level converters have significant problems in high voltage applications - high output dv/dt damages insulation and motor bearings, and the semiconductor switches have high switching losses. Multilevel converters hold the promise of alleviating these problems. This project will research and develop multilevel converter technology for static VAR compensators and medium voltage drives, initially targeted at mining applications.