Design considerations for a high-power dual active bridge DC-DC converter with galvanically isolated transformer

Lee, Youngsil and Watson, Alan James and Vakil, Gaurang and Wheeler, Patrick (2017) Design considerations for a high-power dual active bridge DC-DC converter with galvanically isolated transformer. In: 2017 IEEE Energy Conversion Congress and Exposition (ECCE), 1-5 October 2017, Cincinnatti, Ohio, USA.

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Abstract

Multi-megawatt scale isolated DC-DC converters are likely to become increasingly popular as means to interconnect the MVDC grids of different voltage levels. Threephase dual active bridge DC-DC (3DAB) converters operating with the zero-voltage switching (ZVS) is a promising candidate for the target multi-megawatt application. This paper presents a systematic approach of the design considerations for a 3DAB converter. Firstly, the use of snubber capacitors in medium voltage and medium frequency operating conditions is proposed. Snubber capacitor influence on turn-off current levels and ZVS operating range are introduced and analyzed. In addition, details of thermal management design are introduced. It is established through power loss analysis that the proposed design method reduces the semiconductor losses substantially at full load conditions. Finally, the proposed method has been validated from a 10kW simulation model using PLECS software package.

Item Type: Conference or Workshop Item (Paper)
Additional Information: doi:10.1109/ECCE.2017.8096777
Keywords: Dual active bridge, DC-DC, snubber capacitor, thermal management, power losses, ZVS, MVDC
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Depositing User: Burns, Rebecca
Date Deposited: 22 Mar 2018 15:05
Last Modified: 02 Jul 2018 09:18
URI: http://eprints.nottingham.ac.uk/id/eprint/50596

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