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

Loxton, R C and Teo, K L and Rehbock, V and Ling, Bingo Wing-Kuen (2009) Optimal switching instants for a switched-capacitor DC/DC power converter. Automatica, 45 (4). pp. 973-980. ISSN 0005-1098

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Full text URL: http://dx.doi.org/10.1016/j.automatica.2008.10.031

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.

Item Type:Article
Additional Information: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.
Keywords:Power converter, Impulsive dynamical system, Switched linear system, Semi-infinite programming, Control parametrization enhancing transform
Subjects:H Engineering > H660 Control Systems
H Engineering > H600 Electronic and Electrical Engineering
Divisions:College of Science > School of Engineering
ID Code:2701
Deposited By: Rosaline Smith
Deposited On:23 Jun 2010 16:42
Last Modified:13 Mar 2013 08:39

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