Enhanced double flying capacitor multicell power converter controlled with a new switching pattern

Vahid Dargahi, Arash Khoshkbar Sadigh, Keith Corzine

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This study proposes an enhanced topology for pulse-width-modulated double flying capacitor multicell (DFCM) converter controlled with a new switching pattern in order to reduce voltage diversity and stored energy of flying capacitor (FC) to augment converter's integrity and modularity. The proposed power converter is a hybrid topology realised by cascade connection of DFCM and cascaded H-bridge (CHB) converters while combining, employing, and featuring advantages of both converters. The dc voltage sources and also power switches forming CHB converters' structure in the proposed hybrid topology possess low voltage-ratings, hence imposing low additional costs and prices on DFCM converter whereas improving and enhancing output voltage power quality significantly by increasing the number of output voltage-levels and improving output voltage frequency spectrum. This progress results in reducing the bulky and costly FCs, their voltage ratings and stored energy. The FC voltages of DFCM topology in the proposed hybrid converter get stabilised naturally at their requisite voltage-levels because of the redundant charging/discharging states. First, experimental measurements of the three-cell-seven-level DFCM are provided. Afterward, simulation results and experimental observations of 15-level enhanced DFCM converter are presented to verify and validate the effectiveness and advantages of the proposed topology as well as its suggested control and modulation strategy.

Original languageEnglish (US)
Pages (from-to)2386-2395
Number of pages10
JournalIET Power Electronics
Volume8
Issue number12
DOIs
StatePublished - Dec 1 2015

Fingerprint

Power converters
Capacitors
Electric potential
Topology
Cascade connections
Power quality
Switches
Modulation

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

@article{ad75d50cbd56463e81d7ad413377da68,
title = "Enhanced double flying capacitor multicell power converter controlled with a new switching pattern",
abstract = "This study proposes an enhanced topology for pulse-width-modulated double flying capacitor multicell (DFCM) converter controlled with a new switching pattern in order to reduce voltage diversity and stored energy of flying capacitor (FC) to augment converter's integrity and modularity. The proposed power converter is a hybrid topology realised by cascade connection of DFCM and cascaded H-bridge (CHB) converters while combining, employing, and featuring advantages of both converters. The dc voltage sources and also power switches forming CHB converters' structure in the proposed hybrid topology possess low voltage-ratings, hence imposing low additional costs and prices on DFCM converter whereas improving and enhancing output voltage power quality significantly by increasing the number of output voltage-levels and improving output voltage frequency spectrum. This progress results in reducing the bulky and costly FCs, their voltage ratings and stored energy. The FC voltages of DFCM topology in the proposed hybrid converter get stabilised naturally at their requisite voltage-levels because of the redundant charging/discharging states. First, experimental measurements of the three-cell-seven-level DFCM are provided. Afterward, simulation results and experimental observations of 15-level enhanced DFCM converter are presented to verify and validate the effectiveness and advantages of the proposed topology as well as its suggested control and modulation strategy.",
author = "Vahid Dargahi and Sadigh, {Arash Khoshkbar} and Keith Corzine",
year = "2015",
month = "12",
day = "1",
doi = "10.1049/iet-pel.2014.0738",
language = "English (US)",
volume = "8",
pages = "2386--2395",
journal = "IET Power Electronics",
issn = "1755-4535",
publisher = "Institution of Engineering and Technology",
number = "12",

}

Enhanced double flying capacitor multicell power converter controlled with a new switching pattern. / Dargahi, Vahid; Sadigh, Arash Khoshkbar; Corzine, Keith.

In: IET Power Electronics, Vol. 8, No. 12, 01.12.2015, p. 2386-2395.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhanced double flying capacitor multicell power converter controlled with a new switching pattern

AU - Dargahi, Vahid

AU - Sadigh, Arash Khoshkbar

AU - Corzine, Keith

PY - 2015/12/1

Y1 - 2015/12/1

N2 - This study proposes an enhanced topology for pulse-width-modulated double flying capacitor multicell (DFCM) converter controlled with a new switching pattern in order to reduce voltage diversity and stored energy of flying capacitor (FC) to augment converter's integrity and modularity. The proposed power converter is a hybrid topology realised by cascade connection of DFCM and cascaded H-bridge (CHB) converters while combining, employing, and featuring advantages of both converters. The dc voltage sources and also power switches forming CHB converters' structure in the proposed hybrid topology possess low voltage-ratings, hence imposing low additional costs and prices on DFCM converter whereas improving and enhancing output voltage power quality significantly by increasing the number of output voltage-levels and improving output voltage frequency spectrum. This progress results in reducing the bulky and costly FCs, their voltage ratings and stored energy. The FC voltages of DFCM topology in the proposed hybrid converter get stabilised naturally at their requisite voltage-levels because of the redundant charging/discharging states. First, experimental measurements of the three-cell-seven-level DFCM are provided. Afterward, simulation results and experimental observations of 15-level enhanced DFCM converter are presented to verify and validate the effectiveness and advantages of the proposed topology as well as its suggested control and modulation strategy.

AB - This study proposes an enhanced topology for pulse-width-modulated double flying capacitor multicell (DFCM) converter controlled with a new switching pattern in order to reduce voltage diversity and stored energy of flying capacitor (FC) to augment converter's integrity and modularity. The proposed power converter is a hybrid topology realised by cascade connection of DFCM and cascaded H-bridge (CHB) converters while combining, employing, and featuring advantages of both converters. The dc voltage sources and also power switches forming CHB converters' structure in the proposed hybrid topology possess low voltage-ratings, hence imposing low additional costs and prices on DFCM converter whereas improving and enhancing output voltage power quality significantly by increasing the number of output voltage-levels and improving output voltage frequency spectrum. This progress results in reducing the bulky and costly FCs, their voltage ratings and stored energy. The FC voltages of DFCM topology in the proposed hybrid converter get stabilised naturally at their requisite voltage-levels because of the redundant charging/discharging states. First, experimental measurements of the three-cell-seven-level DFCM are provided. Afterward, simulation results and experimental observations of 15-level enhanced DFCM converter are presented to verify and validate the effectiveness and advantages of the proposed topology as well as its suggested control and modulation strategy.

UR - http://www.scopus.com/inward/record.url?scp=84952795787&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84952795787&partnerID=8YFLogxK

U2 - 10.1049/iet-pel.2014.0738

DO - 10.1049/iet-pel.2014.0738

M3 - Article

AN - SCOPUS:84952795787

VL - 8

SP - 2386

EP - 2395

JO - IET Power Electronics

JF - IET Power Electronics

SN - 1755-4535

IS - 12

ER -