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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Capacitor balance issues of the diode-clamped multilevel inverter operated in a quasi two-state mode

Adam, Grain Philip and Finney, S.J. and Massoud, A. and Williams, B.W. (2008) Capacitor balance issues of the diode-clamped multilevel inverter operated in a quasi two-state mode. IEEE Transactions on Industrial Electronics, 55 (8). pp. 3088-3099. ISSN 0278-0046

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Abstract

A new operational mode for diode-clamped multilevel inverters termed quasi two-level operation is proposed. Such operation aims to avoid the imbalance problem of the dc-link capacitors for multilevel inverters with more than three levels and reduces the dc-link capacitance without introducing any significant voltage ripple at the dc-link nodes. The proposed operation can be generalized for any number of levels. The validity of the proposed multilevel inverter operational mode is confirmed by simulations and experiments on a prototype five-level diode-clamped inverter.