Open AccessActive‐clamping forward converter with non‐linear step‐down conversion
Author(s) -
Lin JingYuan,
Tzeng WengZeng,
Lin ChienYu,
Wang ChaoFu,
Liu PangJung
Publication year - 2015
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.2014.0170
Subject(s) - inductor , converters , duty cycle , voltage , clamping , boost converter , buck–boost converter , diode , power (physics) , forward converter , integrating adc , control theory (sociology) , electronic engineering , electrical engineering , computer science , engineering , physics , control (management) , quantum mechanics , artificial intelligence , computer vision
This study proposes a forward converter with non‐linear step‐down conversion ratio. In comparison with traditional forward converters, it has a higher duty utilisation ratio. Furthermore, the two output inductors can equally divide the load current, and therefore the current stress of inductors and output diodes can be reduced. Thus, the proposed converter is suitable for high step‐down applications. On the primary side, active‐clamp control can nullify the voltage spike of main switch while also achieving zero voltage switching operation of the main switch and auxiliary switch, hence the switching loss can be reduced. Detailed analysis and design of the proposed converter are described. Experimental results are recorded for a prototype converter with an AC input voltage ranging from 90 to 264 V, an output voltage of 12 V, and an output power of 240 W.