Capacitor current programming technique for phase-shift DC-DC converter

Author

Cheung, Victor Sui-pung ; Chung, Henry Shu-Hung

Author_Institution

Centre for Power Electron., City Univ. of Hong Kong, Hong Kong, China

fYear

2011

fDate

17-22 Sept. 2011

Firstpage

1251

Lastpage

1258

Abstract

This paper presents a nonlinear output capacitor current programming technique applicable for full bridge phase-shift dc-dc converters with zero-voltage-switching. The control method can make the converter system exhibit fast transient response to large-signal disturbances. The concept is based on sensing the output voltage and capacitor current, and then estimating the output voltage to dictate the gate signals for the switch pairs in the full bridge. The principle of operation will be described. Detailed steady-state and dynamic characteristics of the converter will be given. The proposed method has been verified by comparing the experimental results of a 500W, 400V/48V prototype with theoretical predictions.

Keywords

DC-DC power convertors; capacitors; zero current switching; fast transient response; full bridge phase-shift DC-DC converters; large-signal disturbances; nonlinear output capacitor current programming technique; power 500 W; voltage 400 V; voltage 48 V; zero-voltage-switching; Bridge circuits; Capacitors; Integrated circuits; Programming; Steady-state; Switches; DC-DC power conversion; control techniques; phase-shift converters;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2011 IEEE

Conference_Location

Phoenix, AZ

Print_ISBN

978-1-4577-0542-7

Type

conf

DOI

10.1109/ECCE.2011.6063920

Filename

6063920