Flying-capacitor-based chopper circuit for DC capacitor voltage balancing in diode-clamped multilevel inverter

Shukla, Anshuman, Ghosh, Arindam, & Joshi, Avinash (2010) Flying-capacitor-based chopper circuit for DC capacitor voltage balancing in diode-clamped multilevel inverter. IEEE Transactions on Industrial Electronics, 57(7), pp. 2249-2261.

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This paper proposes a flying-capacitor-based chopper circuit for dc capacitor voltage equalization in diode-clamped multilevel inverters. Its important features are reduced voltage stress across the chopper switches, possible reduction in the chopper switching frequency, improved reliability, and ride-through capability enhancement. This topology is analyzed using three- and four-level flying-capacitor-based chopper circuit configurations. These configurations are different in capacitor and semiconductor device count and correspondingly reduce the device voltage stresses by half and one-third, respectively. The detailed working principles and control schemes for these circuits are presented. It is shown that, by preferentially selecting the available chopper switch states, the dc-link capacitor voltages can be efficiently equalized in addition to having tightly regulated flying-capacitor voltages around their references. The various operating modes of the chopper are described along with their preferential selection logic to achieve the desired performances. The performance of the proposed chopper and corresponding control schemes are confirmed through both simulation and experimental investigations.

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28 citations in Web of Science®

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ID Code: 34153
Item Type: Journal Article
Refereed: Yes
Keywords: Choppers (Circuits), Invertors, Power Capacitors
DOI: 10.1109/TIE.2009.2029527
ISSN: 0278-0046
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MANUFACTURING ENGINEERING (091000)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2010 IEEE
Deposited On: 17 Aug 2010 23:38
Last Modified: 29 Feb 2012 14:14

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