@inproceedings{2df18f4414c74942a64b3602b0113153,
title = "PWM Strategy for improved natural balancing of a four-level H-bridge Flying Capacitor Converter",
abstract = "Flying capacitor based multilevel PWM converter may be an attractive choice due to the natural balancing property of the capacitor voltages. Previous research on natural balancing of a 4-level H-bridge Flying Capacitor Converter (FCC) with Phase Shifted (PS) PWM showed slow natural balancing rate for small modulation indices. Theoretical natural balancing time constant becomes infinitely large for zero output voltage (modulation index). This was probably the reason that many researchers became interested in active balancing methods for this and other capacitive multilevel voltage source inverters. The paper addresses natural voltage balancing improvement possibilities by employing modified PWM strategies different from classical PS PWM. Dramatic improvement in natural voltage balancing rate for small output voltages is achieved due to making a better use of switching states redundancy. Suggested is a family of improved PWM strategies and the best strategy is identified based on natural balancing damping rate considerations. Natural balancing mechanisms are analyzed using time domain averaging methodology that results in simple easy to interpret expressions regarding parameter influence.",
keywords = "DC / AC converter, modulation strategy, multilevel converter, single phase system",
author = "Anar Ibrayeva and Viktor Ten and Familianty, {Yakov L.} and Alex Rudermanz",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 1st Joint International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2015, International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2015 and International Symposium on Advanced Electromechanical Motion Systems, ELECTROMOTION 2015 ; Conference date: 02-09-2015 Through 04-09-2015",
year = "2016",
month = mar,
day = "7",
doi = "10.1109/OPTIM.2015.7426747",
language = "English",
series = "Joint International Conference - ACEMP 2015: Aegean Conference on Electrical Machines and Power Electronics, OPTIM 2015: Optimization of Electrical and Electronic Equipment and ELECTROMOTION 2015: International Symposium on Advanced Electromechanical Motion Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "311--316",
editor = "Ertan, {H. Bulent}",
booktitle = "Joint International Conference - ACEMP 2015",
address = "United States",
}