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Overmodulation of n-level three-leg DC-AC diode-clamped converters with comprehensive capacitor voltage balance

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10.1109/TIE.2012.2218552
 
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hdl:2117/18443

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Busquets Monge, SergioMés informacióMés informacióMés informació
Maheshwari, RamKrishan
Munk-Nielsen, Stig
Document typeArticle
Defense date2013-05
PublisherIEEE Press. Institute of Electrical and Electronics Engineers
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
This paper presents a novel pulsewidth modulation (PWM) strategy for n-level three-leg semiconductor-clamped dc–ac converters in the overmodulation region, with dc-link capacitor voltage balance in every switching cycle. The strategy is based on the virtual-vector concept. Suitable reference vector trajectories are selected to obtain low weighted total harmonic distortion and a simple algorithm. A hexagonal-boundary compression factor is introduced to guarantee, at any operating point, dc-link capacitor voltage regulation capabilities in every switching cycle and avoid narrow gate pulses. The detailed PWMalgorithm for an easy implementation in a digital control platform is also presented. The good performance of the strategy is verified through both simulation and experiments in a three-level three-phase neutral-point clamped converter.
CitationBusquets-Monge, S.; Maheshwari, R.; Munk-Nielsen, S. Overmodulation of n-level three-leg DC-AC diode-clamped converters with comprehensive capacitor voltage balance. "IEEE transactions on industrial electronics", Maig 2013, vol. 60, núm. 5, p. 1872-1883. 
URIhttp://hdl.handle.net/2117/18443
DOI10.1109/TIE.2012.2218552
ISSN0278-0046
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  • Departament d'Enginyeria Electrònica - Articles de revista [1.602]
  • GREP - Grup de Recerca en Electrònica de Potència - Articles de revista [32]
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