Transient Thermal Impedance Model based on Online-Measurement of the On-State Voltage in IGBT Converters
Conference: CIPS 2016 - 9th International Conference on Integrated Power Electronics Systems
03/08/2016 - 03/10/2016 at Nürnberg, Deutschland
Proceedings: CIPS 2016
Pages: 4Language: englishTyp: PDF
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Authors:
Hambrecht, Andreas; Klitzke, Reno; Lehmann, Stephan (Beuth Hochschule für Technik Berlin, Berlin, Germany)
Wagenitz, Dennis; Dieckerhoff, Sibylle (Technische Universität Berlin, Berlin, Germany)
Abstract:
This paper presents a dynamic model for the transient thermal impedance of IGBT modules which is verified comparing simulation and experimental results. An analysis of the model shows that the phase shift between load current and IGBT on-state voltage can be used to predict ageing of the devices. For the evaluation, a sensor is developed which is able to measure the saturation voltage of IGBTs in a PWM converter operating from a DC link of 1000V. Both methods combined offer new approaches in diagnostics.