Parametric Average-Value Modeling of Multiple-Input Buck Converters

TitleParametric Average-Value Modeling of Multiple-Input Buck Converters
Publication TypeConference Paper
Year of Publication2007
AuthorsDavoudi, A., J. Jatskevich, and P. L. Chapman
Conference NameElectrical and Computer Engineering, 2007. CCECE 2007. Canadian Conference on
Pagination990 -993
Date Publishedapr.
Keywordscorrection matrix, DC-DC converters, DC-DC power convertors, duty cycle, duty-ratio constraint, large-signal time-domain transients, multiple-input buck converters, nonlinear algebraic function, parametric average-value modeling, small-signal characterization, state-space average model, state-space methods, switching-stage dynamic impedance

Average-value modeling of DC-DC converters is an indispensable tool for analysis of power electronic systems. However, analytical derivation of accurate models may be quite challenging especially when multiple modes and the circuits' parasitics are considered. Recently, a computer-aided average-value modeling approach has been proposed in the literature, wherein the average model has a well-defined structure and is constructed with the assistance of the detailed simulation. This paper extends the parametric approach by appropriately including the multi-input source and output dynamics. The approach is based on corrected state-space average model, where the so-called duty-ratio constraint and correction matrix are expressed as nonlinear algebraic functions of the duty cycle and the switching-stage dynamic impedance. The proposed model is shown to be accurate in predicting large-signal time-domain transients and small-signal characterization.


a place of mind, The University of British Columbia

Electrical and Computer Engineering
2332 Main Mall
Vancouver, BC Canada V6T 1Z4
Tel +1.604.822.2872
Fax +1.604.822.5949

Emergency Procedures | Accessibility | Contact UBC | © Copyright 2021 The University of British Columbia