6 kW SiC-HV-Battery Plate

A highly integrated and compact design of a three-phase galvanically non-isolated DC/DC converter with silicon carbide mosfets for connecting a high-voltage battery (Li-ion) to the DC link of an inverter is presented. The specific feature of the converter is the partial load optimization. With a nominal power of 6 kW, an efficiency of 99 % could be achieved from a power of 200 W (3% of the nominal power).