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A 70 kW next generation three-phase solar inverter with multiple MPPTs using advanced cooling concept and stacked-PCB architecture

: Freiche, R.; Franz, S.; Fink, M.; Liese, S.


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 ISE ()

A 70 kW next generation three-phase solar inverter with five MPP Trackers (MPPT's) is presented. The overall concept has been designed to achieve both high efficiency and high power density. SiC semiconductors were implemented using a "hot core" cooling concept in order to get full use of the high temperature allowed by the SiC technology. Based on a stacked PCB architecture, special care was taken to minimize the number, size and cost of the electromechanical components such as connectors and heatsinks.