Averaged modelling of switched-inductor cells considering conduction losses in discontinuous mode

TitleAveraged modelling of switched-inductor cells considering conduction losses in discontinuous mode
Publication TypeJournal Article
Year of Publication2007
AuthorsDavoudi, A., J. Jatskevich, and P. L. Chapman
JournalElectric Power Applications, IET
Volume1
Pagination402 -406
Date Publishedmay.
ISSN1751-8660
Keywordsaverage value model, conduction losses, DC-DC power convertors, discontinuous conduction mode, PWM DC-DC power converters, PWM power convertors, switched-inductor cells
Abstract

Many PWM DC-DC converters contain a switched-inductor cell for which an average-value model is required. However, the presence of parasitics associated with the cell's components complicates the development of accurate averaged models, especially for the discontinuous conduction mode. Here is described an improved full-order, large-signal averaged switching cell. The proposed averaged cell takes into account conduction losses as required by the energy conservation principle and provides a more accurate duty-ratio constraint. The final model shows improvement over several previously established averaged cells in predicting large-signal, time-domain transients as well as small-signal, frequency-domain characteristics

URLhttp://dx.doi.org/10.1049/iet-epa:20060329
DOI10.1049/iet-epa:20060329

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