Mission profile analysis and calorimetric loss measurement of a SiC hybrid module for main inverter application of electric vehicles

This paper evaluates the benefits of replacing the Si diodes of a commercial IGBT module for the main inverter application of an electric vehicle with SiC diodes, leaving the other components of the package and the system unchanged. This will give a direct comparison of Si vs SiC diodes, without giving scope for discrepancies arising out of differences in the packaging, gate-driver circuit etc. The IGBT-module chosen for comparison is a low inductance (8nH) HybridPACK Drive module from Infineon, suitable for high speed switching. A loss model is developed for the modules, and the resulting model is used to investigate the performance for various drive cycles (Artemis, WLTP, NEDC). A calorimetric loss measurement setup is developed for experimental verification of the results.