Open AccessThree‐phase bidirectional dc/ac converter using a six‐leg inverter connected to a direct ac/ac converter
Author(s) -
Waltrich Gierri,
Duarte Jorge L.,
Hendrix Marcel A.M.
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.2015.0059
Subject(s) - flyback converter , ćuk converter , forward converter , buck–boost converter , transformer , inverter , three phase , boost converter , sinadr , electronic engineering , computer science , topology (electrical circuits) , electrical engineering , engineering , voltage
In this study, a three‐phase bidirectional dc/ac converter is proposed using a direct ac/ac converter and a six‐leg converter, to avoid the use of dc‐link capacitors and to increase the current capability at the dc side. To link the six‐leg inverter to the direct ac/ac converter, three single‐phase high‐frequency transformers are implemented to simplify the topology, which will attract the industry. The direct ac/ac converter used in the study demonstrates reduced complexity and simpler modulation techniques compared with a conventional matrix converter. The analysis starts with the description of the proposed dc/ac converter for single phase, which is subsequently extended to a three‐phase dc/ac converter. A 20 kW prototype was built to verify and to validate the theoretical study of the proposed converter.