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P.W. Nussbaumer, C. Zöller, M. Plöchl, T. Wolbank:
"Transient Distribution of Voltages in Induction Machine Stator Windings Resulting from Switching of Power Electronics";
Vortrag: IEEE Industrial Electronics Society, Wien; 10.11.2013 - 13.11.2013; in: "Proceedings of Conference on IEEE Industrial electronics Society (IECON)", (2013), ISBN: 978-1-4799-0223-1; S. 3186 - 3191.

The fields of application of adjustable speed drives
fed by voltage source inverters is constantly increasing. For
better exploitation of the system´s capabilities all drive
components are more and more operated near and even above
their rated values. This leads to more strains for the drive.
However, at the same time the demands for reliability are also
increasing. To reach this requirement different strategies like
fault tolerant design, fault detection and condition monitoring
can be implemented. However, to implement such strategies a
deep understanding of the effects that lead to problems or faults
in the drive system is necessary. The fast switching of modern
voltage source inverters leads to transient overvoltage stressing
the machine´s insulation system. A short literature study
presenting the characteristic of and the parameters influencing
the non-linear voltage distribution in the stator winding of
inverter-fed machines will be presented. Furthermore the
findings will be compared with experimental results on an
induction machine with tapped windings.

http://publik.tuwien.ac.at/files/PubDat_223941.pdf