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Compensation of non-linearities in diode-clamped multilevel converters

By S. Minshull, Chris Bingham, D. A. Stone and M. P. Foster

Abstract

The application of multilevel converters for exciting permanent magnet machines with low-phase inductance to DC-link voltage ratios facilitates a reduction in high frequency switching harmonics. However, converter non-linearities and, in-particular, on-state device voltage drops, create additional low-frequency harmonics. This paper therefore proposes a generic compensation scheme to accommodate the effects of such converter non-linearities and, in so doing, improve the harmonic quality of the machine phase currents. Experimental results gathered from a prototype 5-level diode clamped converter validate the benefits of the proposed scheme by showing quantitative reductions in low frequency harmonics

Topics: H600 Electronic and Electrical Engineering
Publisher: Institution of Electronic and Electrical Engineers
Year: 2010
DOI identifier: 10.1109/TIE.2009.2023631
OAI identifier: oai:eprints.lincoln.ac.uk:2868

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