Single‐stage high‐power factor half‐bridge flyback converter with synchronous rectifier. Issue 1 (1st January 2014)

• Record Type: Journal Article
• Authors: Kim, Kyu‐Tae; Kwon, Jung‐Min; Lee, Han‐Mo; Kwon, Bong‐Hwan
• Is Part Of: IET power electronics. Volume 7:Issue 1(2014)
• Page Start: 1
• Page End: 10
• Publication Date: 2014-01-01
• Subjects: power factor correction -- PWM power convertors -- rectifiers -- zero current switching -- zero voltage switching; frequency 100 kHz -- power 200 W -- voltage 24 V -- constant switching frequency -- zero‐current switching -- SR switch -- low on‐resistance metal oxide semiconductor field effect transistor -- diode rectifier -- conduction loss -- switching losses -- zero‐voltage switching -- asymmetrical pulse‐width modulation half‐bridge flyback converter -- ripple current -- power factor correction -- unity power factor -- synchronous rectifier -- single‐stage high‐power factor half‐bridge flyback converter; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2011.0387
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : In this study, a single‐stage half‐bridge flyback converter using a synchronous rectifier (SR) is proposed to achieve unity power factor and higher efficiency. The proposed power factor correction can achieve almost a unity power factor and low input ripple current. The asymmetrical pulse‐width modulation (APWM) half‐bridge flyback converter operates under zero‐voltage switching to reduce switching losses. The conduction loss of the system can be reduced by replacing the diode rectifier with an SR using a low on‐resistance metal oxide semiconductor field effect transistor and the SR switch operates under zero‐current switching. Detailed analysis is presented on the proposed converter. Experimental results for a 24 V/200 W converter at a constant switching frequency of 100 kHz were obtained to prove the analysis.