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Comprehensive AC performance analysis of ceramic capacitors for DC link usage

: Klein, K.; Hoene, E.; Lang, K.-D.


MESAGO PCIM GmbH, Stuttgart:
PCIM Europe 2017, International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. Proceedings : Nuremberg, 16 - 18 May 2017
Berlin: VDE Verlag, 2017
ISBN: 978-3-8007-4424-4
PCIM Europe <2017, Nuremberg>
Conference Paper
Fraunhofer IZM ()

The paper explains the needs for using of an additional DC link capacitor closely to fast switching semiconductor and derives design rules for it. Results of the shown study on X7R, X6S, X7T and CeraLink capacitors help to choose correct capacitor for DC link usage, to be able to design switching cell properly. Cs and ESR of capacitors were measured and compared to typical datasheet values, and completed with large amplitude measurements (iac=1A) for different DC-voltages, frequencies and higher temperatures (RT/80 deg C /125 deg C). Design rules are proved empirically implying corrected capacitance values of used capacitors.