Optimal PWM Control of Switched-Capacitor DC–DC Power Converters via Model Transformation and Enhancing Control Techniques

Author

Ho, Charlotte Yuk-Fan ; Ling, BingoWing-Kuen ; Liu, Yan-Qun ; Tam, Peter Kwong-Shun ; Teo, Kok-Lay

Author_Institution

Sch. of Math. Sci., Univ. of London, London

Volume

55

Issue

5

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1382

Lastpage

1391

Abstract

This paper presents an efficient and effective method for an optimal pulsewidth-modulated (PWM) control of switched-capacitor dc-dc power converters. Optimal switching instants are determined based on minimizing the output ripple magnitude, the output leakage voltage and the sensitivity of the output load voltage with respect to both the input voltage and the load resistance. This optimal PWM control strategy has several advantages over conventional PWM control strategies: 1) it does not involve a linearization, so a large-signal analysis is performed; and 2) it guarantees the optimality. The problem is solved via both the model transformation and the optimal enhancing control techniques. A practical example of the PWM control of a switched-capacitor dc-dc power converter is presented.

Keywords

DC-DC power convertors; PWM power convertors; linearisation techniques; optimal control; switched capacitor networks; voltage control; input voltage; linearization; load resistance; model transformation; optimal PWM control; optimal enhancing control techniques; optimal pulsewidth-modulated control; optimal switching; output leakage voltage; output load voltage; output ripple magnitude; switched-capacitor DC-DC power converters; switched-capacitor dc-dc power converters; Model transformation technique; Optimal PWM control; model transformation technique; optimal enhancing control technique; optimal pulsewidth-modulated (PWM) control; switched-capacitor DC/DC power converters; switched-capacitor dc–dc power converters;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2008.916442

Filename

4435081