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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Quasi two-level operation of a five-level inverter

Adam, G.P. and Finney, S.J. and Williams, B.W. (2007) Quasi two-level operation of a five-level inverter. In: Proceedings of Compatibility in Power Electronics, 2007. IEEE, pp. 1-6. ISBN 1-4244-1055-X

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Abstract

In this paper a five-level inverter operational mode termed quasi two-level operation is proposed. The multilevel capacitors function in a soft clamping mode where capacitor voltage balancing is maintained by varying the transient dwell time at each level. Two balancing techniques are proposed. The first is based on the selection of suitable resistors to be connected across each dc link capacitor in order to maintain balance. The second method is based on varying the dwell time at the intermediate nodes of the dc link capacitors. The validity of the operational mode and the two proposed balancing techniques are confirmed by simulations and experiments.