Topological Comparison of Three-Level Inverters for Medium-Voltage Contactless Power Transfer

This paper evaluates four three-level (3-L) inverter topologies for achieving the medium voltage DC transformer (DCX) for contactless power transfer (CPT) applications. The analysis and simulation results evaluate several key parameters, namely the voltage stress, current stress, and VA rating of the power transformer and resonant capacitor for a proposed 4000 V to 50 V, 20 kW contactless power supply using 3.3 kV SiC MOSFETs for data center application.