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Technical Lecture

Bidirectional DC-DC Converters

T02.5 - A 6.6 kW Highly Efficient Reconfigurable Dual Active Bridge Converter Designed using Planar Transformer, SiC-Fets and Monolithic Bidirectional Devices

Tuesday, March 18, 2025
9:50 AM – 10:10 AM ET
Location: Level Three, A302
The concept of reconfigurable DAB converter is developed in this work to alleviate such problem. A planar transformer (PT) design using Pareto-Front optimization is also carried out for galvanic isolation to further improve the overall efficiency/power density. By incorporation of SiC-FETs and a recently developed monolithic bidirectional GaN device in the proposed reconfigurable DAB converter, four different configurations are extracted aiming to preserve the ZVS operation with a high overall efficiency for a wide range of input/output voltage regulation. Working principle of the proposed concept is discussed, while the design guidance of the PT is given. A 6.6 kW/50 kHz prototype with a 98% peak efficiency is fabricated and its detailed experimental results in each of the operation modes are presented.