Single-Stage AC/DC Boost–Forward Converter With High Power Factor and Regulated Bus and Output Voltages

Author

Lu, Dylan Dah-Chuan ; Iu, Herbert Ho-Ching ; Pjevalica, Velibor

Author_Institution

Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW

Volume

56

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

2128

Lastpage

2132

Abstract

Unlike existing single-stage AC/DC converters with uncontrolled intermediate bus voltage, a new single-stage AC/DC converter achieving power factor correction (PFC), intermediate bus voltage output regulation, and output voltage regulation is proposed. The single-power-stage circuit is formed by integrating a boost PFC converter with a two-switch-clamped forward converter. The current stress of the main power switches is reduced due to separated conduction period of the two source currents flowing through the power switch. A dual-loop peak-current-mode controller is proposed to achieve PFC and ensure independent bus voltage and output voltage regulations. Experimental results on a 24-V/100-W hardware prototype are given to confirm the theoretical analysis and performance of the proposed converter. The converter has conversion efficiency ranging from 86% to 92% at full-load condition.

Keywords

AC-DC power convertors; electric current control; power factor correction; switching convertors; voltage control; boost PFC converter; dual-loop peak-current-mode controller; efficiency 86 percent to 92 percent; intermediate bus voltage regulation; power 100 W; power factor correction; power switch; single-stage AC-DC boost-forward converter; two-switch-clamped forward converter; voltage 24 V; AC/DC converter; power factor correction (PFC); single-stage;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2009.2014304

Filename

4776500