Open AccessAnalysis and design of a high‐step‐down ratio resonant converter
Author(s) -
Yau YeuTorng,
Jiang WenZhuang,
Hwu KuoIng
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.2015.0368
Subject(s) - inductor , capacitor , leakage inductance , buck converter , inductance , capacitance , buck–boost converter , filter capacitor , boost converter , electronic engineering , electrical engineering , voltage , rlc circuit , engineering , physics , electrode , quantum mechanics
In this study, a high‐step‐down ratio resonant converter is presented, which integrates one coupled inductor and one resonant energy‐transferring capacitor with small capacitance. The resonant energy‐transferring capacitor resonates with the leakage inductance of the coupled inductor. Furthermore, the energy‐transferring capacitor is connected between the input voltage and the coupled inductor. Therefore, a high‐step‐down voltage gain can be achieved, which is lower than those of the traditional synchronously‐rectified buck converter and the tapped‐inductor buck converter. Moreover, the modulated switching frequency span is low; thus, it is easy to design the output filter. In addition, since the small value of the resonant energy‐transferring capacitor is used, the power density can be upgraded. Finally, some analyses and experimental results are given to verify the feasibility and effectiveness.