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.
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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|Item Type:||Journal Article|
|Keywords:||Choppers (Circuits), Invertors, Power Capacitors|
|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:||18 Aug 2010 09:38|
|Last Modified:||01 Mar 2012 00:14|
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