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Optimal switching instants for a switched-capacitor DC/DC power converter

By R C Loxton, K L Teo, V Rehbock and Bingo Wing-Kuen Ling

Abstract

We consider a switched-capacitor DC/DC power converter with variable switching instants. The determination of optimal switching instants giving low output ripple and strong load regulation is posed as a non-smooth dynamic optimization problem. By introducing a set of auxiliary differential equations and applying a time-scaling transformation, we formulate an equivalent optimization problem with semi-infinite constraints. Existing algorithms can be applied to solve this smooth semi-infinite optimization problem. The existence of an optimal solution is also established. For illustration, the optimal switching instants for a practical switched-capacitor DC/DC power converter are determined using this approach

Topics: H660 Control Systems, H600 Electronic and Electrical Engineering
Publisher: Elsevier
Year: 2009
DOI identifier: 10.1016/j.automatica.2008.10.031
OAI identifier: oai:eprints.lincoln.ac.uk:2701
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