In-situ Thermal Impedance Spectroscopy of Power Electronic Modules for Localized Degradation Identification

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 8Sprache: EnglischTyp: PDF

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van der Broeck, Christoph H.; Kalker, Sven; De Doncker, Rik W. (RWTH Aachen University ISEA, Germany)
Polom, Timothy A. (RWTH Aachen University ISEA, Germany & University of Wisconsin-Madison WEMPEC, USA)
Lorenz, Robert D. (University of Wisconsin-Madison WEMPEC, USA)

This paper introduces a method for in-situ thermal impedance spectroscopy (ITIS) of power electronic modules in PWM converters. The method extracts the thermal-impedance frequency response function of power modules over a wide bandwidth in real-time without interrupting normal converter operation. The obtained thermal-impedance information allows identifying different degradation mechanisms of power modules, e.g. delamination of the power devices and the DCB as well as a deterioration of the convection process. Thus, this method serves as a sensor for remote state-of-health monitoring of power modules enabling predictive maintenance for safer and more reliable future converter systems.