A simple and effective method to alleviate the rectifier reverse-recovery problem in continuous-current-mode boost converters

Author

Zhao, Qun ; Tao, Fengfeng ; Lee, Fred C. ; Xu, Peng ; Wei, Jia

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

16

Issue

5

fYear

2001

fDate

9/1/2001 12:00:00 AM

Firstpage

649

Lastpage

658

Abstract

Rectifier reverse-recovery problems cause a significant efficiency reduction as well as severe electromagnetic interference (EMI) in continuous-current-mode (CCM) boost converters. To alleviate these problems, this paper presents a simple and effective solution that involves shifting the original rectifier current to a new branch, which consists of a rectifier and a coupled winding of the boost inductor. When the active switch turns on, the current through the original boost rectifier is zero and the current decrease rate di/dt in the new branch is controlled by the leakage inductor. Based on the operation analysis, design issues to guarantee complete current shift are also addressed. Applying the proposed concept to a 500 W CCM DC/DC boost converter and a 500 W CCM power factor correction (PFC) boost converter with universal-line input generates a 2% efficiency improvement. The same concept can be easily extended to other basic DC/DC and CCM PFC converters

Keywords

AC-DC power convertors; DC-DC power convertors; electromagnetic interference; power factor correction; rectifying circuits; switching circuits; windings; 500 W; DC/DC power conversion; EMI; active switch turn on; boost inductor; continuous-current-mode boost converters; coupled winding; current decrease rate; design issues; efficiency improvement; electromagnetic interference; leakage inductor; operation analysis; power factor correction; rectifier; rectifier reverse-recovery problem alleviation; universal-line input; Electromagnetic interference; Gallium arsenide; Inductors; Power factor correction; Rectifiers; Resonance; Silicon; Switches; Thyristors; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.949497

Filename

949497