Open AccessHigh‐efficiency duty‐cycle controlled full‐bridge converter for ultracapacitor chargers
Author(s) -
WooYoung Choi
Publication year - 2016
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.2015.0090
Subject(s) - duty cycle , ripple , supercapacitor , constant current , rectifier (neural networks) , ćuk converter , boost converter , electrical engineering , voltage , forward converter , automotive engineering , control theory (sociology) , engineering , computer science , capacitance , control (management) , chemistry , electrode , stochastic neural network , machine learning , artificial intelligence , recurrent neural network , artificial neural network
This study proposes a high‐efficiency duty‐cycle controlled full‐bridge dc–dc converter for ultracapacitor chargers. By the asymmetric duty‐cycle control, the proposed converter achieves zero‐voltage switching of power switches without circulating currents. It reduces the output current ripple by the current‐doubler rectifier. A control strategy is suggested for charging ultracapacitors. A constant current and constant voltage charging is performed. The proposed converter achieves a higher efficiency compared with the conventional phase‐shift controlled full‐bridge converter. The performance of the proposed converter is evaluated by experimental results for a 30 F ultracapacitor bank.