SiC-Based High Efficiency High Isolation Dual Active Bridge Converter for a Power Electronic Transformer

Mariam Saeed, María R. Rogina, Alberto Rodríguez, Manuel Arias and Fernando Briz
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Mariam Saeed: Department of Electrical Engineering, University of Oviedo, 33204 Asturias, Spain
María R. Rogina: Department of Electrical Engineering, University of Oviedo, 33204 Asturias, Spain
Alberto Rodríguez: Department of Electrical Engineering, University of Oviedo, 33204 Asturias, Spain
Manuel Arias: Department of Electrical Engineering, University of Oviedo, 33204 Asturias, Spain
Fernando Briz: Department of Electrical Engineering, University of Oviedo, 33204 Asturias, Spain

Energies, 2020, vol. 13, issue 5, 1-18

Abstract: This paper discusses the benefits of using silicon carbide (SiC) devices in a three-stage modular power electronic transformer. According to the requirements to be fulfilled by each stage, the second one (the DC/DC isolation converter) presents the most estimable improvements to be gained from the use of SiC devices. Therefore, this paper is focused on this second stage, implemented with a SiC-based dual active bridge. Selection of the SiC devices is detailed tackling the efficiency improvement which can be obtained when they are co-packed with SiC antiparallel Schottky diodes in addition to their intrinsic body diode. This efficiency improvement is dependent on the dual active bridge operation point. Hence, a simple device loss model is presented to assess the efficiency improvement and understand the reasons for this dependence. Experimental results from a 5-kW Dual Active Bridge prototype have been obtained to validate the model. The dual active bridge converter is also tested as part of the full PET module operating at rated power.

Keywords: SiC devices; antiparallel diode; dual active bridge; power electronic transformer; high-frequency transformer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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