Open AccessSingle‐stage high‐power factor half‐bridge flyback converter with synchronous rectifier
Author(s) -
Kim KyuTae,
Kwon JungMin,
Lee HanMo,
Kwon BongHwan
Publication year - 2014
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2011.0387
Subject(s) - flyback converter , power factor , rectifier (neural networks) , flyback diode , ripple , flyback transformer , buck converter , buck–boost converter , electrical engineering , boost converter , materials science , control theory (sociology) , electronic engineering , physics , engineering , voltage , computer science , stochastic neural network , control (management) , machine learning , artificial intelligence , recurrent neural network , artificial neural network , transformer
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.