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https://www.um.edu.mt/library/oar/handle/123456789/123099
Title: | Common dc-link capacitor harmonic current minimization for cascaded converters by optimized phase-shift modulation |
Authors: | Zhou, Xuanyi Choy, Wei Juin Alcaide, Abraham M. Wang, Shuo Guenter, Sandro Leon, Jose I. Monopoli, Vito Giuseppe Franquelo, Leopoldo G. Liserre, Marco Gerada, Chris Buticchi, Giampaolo Galea, Michael |
Keywords: | Capacitors -- Mathematical models Electric currents, Direct Cascade converters Electric motors Power electronics |
Issue Date: | 2023 |
Publisher: | MDPI AG |
Citation: | Zhou, X., Choy, W. J., Alcaide, A. M., Wang, S., Guenter, S., Leon, J. I.,...Buticchi, G. (2023). Common DC-link capacitor harmonic current minimization for cascaded converters by optimized phase-shift modulation. Energies, 16(5), 2098. |
Abstract: | This paper investigates the influence of a constant carrier phase shift on the DC-link capacitor harmonic current of cascaded converters used in fuel-cell and mild-hybrid electric vehicles. In these applications, a DC-DC converter can be adopted between the battery and the motor drive inverter in a cascaded structure, where the two converters share the same DC-link. Since the DClink capacitor of such a system represents a critical component, the optimization of the converter operation to limit the current stress and extend the lifetime of the capacitor is an primary objective. This paper proposes the use of a carrier phase shift between the modulations of the two converters in order to minimize the harmonic current of the DC-link capacitor. By harmonic analysis, an optimal carrier phase shift can be derived depending on the converter configuration. Analytical results are presented and validated by hardware-in-the-loop experiments. The findings show that the pulse width modulation carrier phase shift between the interleaved boost converter and the voltage source motor drive inverter has a significant influence on the DC-link capacitor current and thus on its lifetime. A case study with two-cell and three-cell interleaved boost converters shows a possible DC-link capacitor lifetime extension of up to 390%. |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/123099 |
Appears in Collections: | Scholarly Works - FacEngEE |
Files in This Item:
File | Description | Size | Format | |
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Common dc link capacitor harmonic current minimization for cascaded converters by optimized phase shift modulation 2023.pdf | 3.76 MB | Adobe PDF | View/Open |
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