Using the Zth(t) – power pulse measurement to detect a degradation in the module structure

Conference: PCIM Europe 2015 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/19/2015 - 05/20/2015 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2015

Pages: 7Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Authors:
Hiller, Sebastian; Beier-Moebius, Menia; Frankeser, Sophia; Lutz, Josef (Chair of Power Electronics and EMC, Technische Universität Chemnitz, Germany)

Abstract:
The electrification in the field of vehicles is progressing immensely. Therefore, power electronics plays an increasingly role. To guarantee a high reliability of the devices, health monitoring functions included into the inverter block are of interest. This paper describes a short pulse quasi-Zth-method to measure the state-of-health of the power switches in the vehicle without any external equipment. The method, which will be presented, just needs an optimized driver circuitry.