IGBT Modules - Technologies, Driver and Application (Second Edition) - page 360

Finally, in order to be able to turn off a short circuit current or overload current, all IGBTs
connected in series should switch at the same time. Monitoring of an IGBT desaturation
would not work, as it does not take effect for all devices at the same time, because of
the tolerances of the IGBTs.
With regard to IGBTmodules, it should also be pointed out that there are alternatives,
including half-bridges in cascade connection, three-level VSI andmulti-level inverters. In
Asia, for example, for motor inverters the most popular choice for medium- and high-
voltage applications is theVSI cascade circuit. These solutions are described in detail in
8.4 References
1. Dynex Semiconductor Ltd, "Parallel Operation of Dynex IGBT Modules", Dynex
Semiconductor LtdApplicationNote 2002
2. Infineon Technologies, "Paralleling of EconoPACK+", Infineon Technologies
ApplicationNote 2004
3. International Rectifier, "Design of the Inverter Output Filter for Motor Drives with
IRAMSPower Modules", International Rectifier ApplicationNote 2008
4. H. Zenker, A. Gerfer, B. Rall, "Trilogie der Induktivitäten", Swiridoff Verlag 2001, 2
Edition 2001
5. H. Ruedi, O. Garcia, "Intelligent Paralleling", Bodo’sPower Systems 2009
6. J.W. Baek, D.W. Yoo, H.G. Kim, "High-Voltage Switch Using Series-Connected
IGBTsWith Simple Auxiliary Circuit", IEEE Transactions on Power Electronics Vol.
37No. 6, 2001
7. D. Zhou, D.H. Braun, "A Practical Series Connection Technique for Multiple IGBT
Devices", PESC 2001
8. K. Fujii, K. Kunomura, K. Yoshida, A. Suzuki, S. Konishi, M. Daiguji, K. Baba,
"STATCOM Applying Flat-Packaged IGBTs Connected in Series", IEEE
Transactions onPower ElectronicsVol. 20No. 5, 2005
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