Paper Info
Title
A Multilevel Inverter With Inherent Common Coupling Point Voltage Balancing of Stacked Capacitors Across a Single DC-Link for Induction Motor Drives
Abstract
In this article, a nine-level multilevel topology is proposed by stacking of low voltage basic inverter cells and then cascading with H-bridges. The dc-link is split into four equal halves by series-connected capacitors from a common dc-link. Three common coupling points (CCPs) are formed due to the stacking of four capacitors, which are connected across the dc-link. The CCP voltage balancing is ensured by drawing or injecting zero instantaneous currents from each of these points at any instant. A six-phase symmetrical IM is used to generate equal and opposite instantaneous phase currents by applying exactly equal and opposite phase voltages for two opposite phases from the six-phase inverter. Simultaneously, the capacitor voltage balancing of H-bridge inverter cells is also achieved by proper selection of redundancies from the available pole voltage redundancies. The concept is verified with a nine-level inverter laboratory prototype, which consists of a five-level stacked inverter, and followed by two low voltage cascaded H-bridge inverters in each phase. Detailed experimental results of steady-state and transient conditions are included to validate the proposed scheme.
Year
DOI
Venue
2022
10.1109/TIE.2021.3137443
IEEE Transactions on Industrial Electronics
Keywords
DocType
Volume
Cascaded H-bridge (CHB),induction motor drive,inverter,multilevel,multiphase,neutral point balancing,single dc-link,stacked inverter
Journal
69
Issue
ISSN
Citations 
12
0278-0046
0
PageRank 
References 
Authors
0.34
6
7
Name
Order
Citations
PageRank
Tutan Debnath100.34
Rakesh R.200.34
Mriganka Ghosh Majumder300.68
Mohammed Imthias400.34
K. Gopakumar563574.23
Umanand Loganathan600.34
Leopoldo G. Franquelo755256.44