Open AccessSecondary‐side phase‐shifted full‐bridge converter with reset winding
Author(s) -
Liu Wei,
Zhao Qinglin,
Wang Deyu,
Li Kunlun,
Wang Yujie
Publication year - 2020
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.2019.1470
Subject(s) - inductor , clamping , inductance , reset (finance) , diode , converters , clamper , electrical engineering , voltage , boost converter , engineering , materials science , mechanical engineering , financial economics , economics
A resonant inductor and two clamping diodes are introduced into the secondary phase shift full‐bridge converter (SPS‐FBC), which can well suppress voltage spike across the rectifiers. However, the resonant inductor and two clamping diodes will bring some other problems. In this study, an auxiliary winding in series with the resonant inductor is added to the SPS‐FBC to reset the clamp diode current rapidly. The auxiliary winding not only reduces the circulation losses of the switches and the clamping diodes, but also makes the clamping diodes naturally turn‐off and avoids the reverse recovery even when the output filter inductance and magnetising inductance are relatively large. The principle of operation and performance are illustrated and verified on a 1.5 kW experimental circuit. In addition, the efficiency and losses of the converters with/without reset winding are compared and analysed. The efficiency of the converter with reset winding is significantly improved over the entire operating range and the peak efficiency is 96.60% at full load.