Open AccessPower loss analysis of active clamp forward converter in continuous conduction mode and discontinuous conduction mode operating modes
Author(s) -
Xu Shen,
Zhang Taizhi,
Yao Yunpeng,
Sun Weifeng
Publication year - 2013
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.2013.0019
Subject(s) - control theory (sociology) , operating point , thermal conduction , rectifier (neural networks) , inductor , power (physics) , boost converter , power factor , ac power , materials science , voltage , physics , electrical engineering , engineering , computer science , control (management) , artificial intelligence , composite material , stochastic neural network , quantum mechanics , machine learning , recurrent neural network , artificial neural network
In order to improve the light‐load efficiency of active clamp forward converter with synchronous rectifier (SR), power loss analysis of the converter operating in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) are presented in this study. The light‐load efficiency of normal ACF converter with SR is low because the output inductor current can go negative when operating in CCM. Considering the fixed frequency control only, to shift the converter's operating mode from CCM to DCM at a critical point of output current at light‐load is a solution for efficiency improvement. Based on the CCM and DCM power dissipation models proposed in this study, the power loss characteristics of the converter are analysed, and the critical shift point of output current can be derived, which has also been verified by an experimental prototype.