Fault-Tolerant B6-B4 Inverter Reconfiguration with Fuses and Ideal Short-On Failure IGBT Modules
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 8Language: englishTyp: PDF
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Authors:
Gleissner, Michael; Bakran, Mark-M. (University of Bayreuth, Department of Mechatronics, Centre of Energy Technology, Germany)
Abstract:
Fault-tolerance is a common measure to improve power electronics availability and to ensure functional safety. A six-switch three-phase voltage source inverter (B6) can be reconfigured to a four-switch three-phase voltage source inverter (B4) with DC link midpoint connection after semiconductor failure. This paper presents a new reconfiguration method without active switches for ideal short-on failure IGBT modules via diodes and fuses. The ideal short-on failure behaviour of modules with sandwich structure after current stress over a longer period is investigated and verified by cross-section analysis. Details on the inverter reconfiguration and post-fault operation strategy are explained in theory and with a prototype. The new fault-tolerant inverter is less complex than known equivalents.