Design of 1500V/200kW 99.6% Efficiency Dual Active Bridge Converters Based on 1700V SiC Power MOSFET Module

Xu, Wei; Yu, Rui yang; Guo, Zhicheng; Huang, Alex Q.

doi:10.1109/ecce44975.2020.9235903

Design of 1500V/200kW 99.6% Efficiency Dual Active Bridge Converters Based on 1700V SiC Power MOSFET Module

Conference · Sun Oct 11 00:00:00 EDT 2020 · 2020 IEEE Energy Conversion Congress and Exposition (ECCE)

DOI:https://doi.org/10.1109/ecce44975.2020.9235903· OSTI ID:2229095

Xu, Wei ^[1]; Yu, Rui yang; Guo, Zhicheng; Huang, Alex Q.

University of Texas at Austin

High efficiency, high density and galvanically isolated power converters are attractive for medium voltage high power applications. This paper presents a 1.5kV/200kW bidirectional Dual Active Bridge (DAB) converter using a newly developed 1.7kV SiC MOSFET module. The intended application is megawatt scale solid state transformer (SST) and 1500V PV inverter application using modular architecture. One novel model to estimate the turn-off loss using snubber capacitors is proposed and experimentally verified. An optimized PCB-based busbar design is introduced to reduce the voltage overshoot across the SiC device, making the design suitable for 1.5kVdc applications. The mechanism of how the optimized PCB-based busbar can reduce the voltage overshoot is quantitatively interpreted and experimentally verified. The DAB converter achieved an efficiency of 98.85% at 200kW and a maximum of 99.53% at 60kW. The maximum efficiency for series-resonant mode is 99.6% at 85kW and 99.3% at 200kW. The power density is 26W/inch3 (1.6MW/m3) which is much higher than traditional industry products.

Research Organization:: University of Texas at Austin

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

DOE Contract Number:: EE0008348

OSTI ID:: 2229095

Journal Information:: 2020 IEEE Energy Conversion Congress and Exposition (ECCE), Journal Name: 2020 IEEE Energy Conversion Congress and Exposition (ECCE)

Country of Publication:: United States

Language:: English

References (12)

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