A 100 kW SiC Switched Tank Converter for Transportation Electrification

This article presents a 100-kW switched tank converter (STC) using SiC mosfet s for transportation power electronic systems. This bidirectional dc–dc converter targets 300–600 V voltage conversion. Total semiconductor loss index has been proposed to evaluate topology and device technologies. The boost converter and one-cell STC have been fairly compared by utilizing this index. The STC design procedures, including SiC mosfet , heat sink, resonant tank components, and dc capacitors, are explained in detail. The simulation results of a 100-kW one-cell STC working at zero-current switching mode have been provided. A 100-kW first-generation hardware prototype using 1200 V, 600 A SiC power module has been built and tested. The power density of the main circuit is about 42 kW/L. The desirable thermal performance of the hardware prototype is demonstrated, which is consistent with the theoretical design. The measured efficiency reaches peak 98.7% at around 30 kW, about 98.5% at 50 kW, and 97.4% at 100 kW full load.