Open AccessA Redundancy‐based scheme for balancing DC‐link voltages in cascaded H‐bridge rectifiers
Author(s) -
Keshavarzian Ali,
ImanEini Hossein
Publication year - 2013
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.2012.0533
Subject(s) - redundancy (engineering) , link (geometry) , h bridge , voltage , scheme (mathematics) , computer science , bridge (graph theory) , control theory (sociology) , topology (electrical circuits) , electrical engineering , electronic engineering , engineering , computer network , mathematics , pulse width modulation , artificial intelligence , control (management) , operating system , medicine , mathematical analysis
A new voltage balancing algorithm is introduced for cascaded H‐bridge rectifiers. This kind of converter is made of a series connection of H‐bridge cells with separate dc‐links. The proposed balancing algorithm will regulate the voltage of all dc‐links to the desired reference value, even if the attached loads are very different. The input current is also programmed to be sinusoidal and has low distortion, while the switching frequency is kept low at 1 kHz. In addition, the input power factor can be controlled. The simulation and experimental results are presented to confirm the validity of the proposed algorithm.