Open AccessInput‐series and output‐series connected modular single‐switch flyback converter operating in the discontinuous conduction mode
Author(s) -
Pagliosa Mauro André,
Faust Rafael Gomes,
Lazzarin Telles Brunelli,
Barbi Ivo
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.2015.0935
Subject(s) - flyback transformer , flyback converter , converters , modular design , series and parallel circuits , voltage , voltage controller , electronic engineering , control theory (sociology) , controller (irrigation) , computer science , electrical engineering , engineering , voltage source , boost converter , voltage droop , transformer , operating system , biology , agronomy , control (management) , artificial intelligence
This study proposes a modular isolated dc–dc converter, based on the input‐series and output‐series connection of flyback converters operating in discontinuous conduction mode, as an alternative to provide higher voltage capability for medium‐voltage applications (1–10 kV), from low‐voltage semiconductors and passive components. The proposed architecture allows the modular system to operate with a simplified control scheme thanks to an intrinsic voltage‐balancing mechanism. The voltage‐balancing mechanism is investigated by theoretical analysis, both for steady‐state and dynamic operations. A small‐signal ac modelling of the architecture is developed to design the total output‐voltage controller. To experimentally verify the proposed technique, a laboratory prototype system with three single‐switch flyback converters, with 3 kW output power, 600 V dc input and output voltages, and 40 kHz of switching frequency was built.