Design of a Dual Active Bridge Converter for On-Board Vehicle Chargers using GaN and into Transformer Integrated Series Inductance

In this paper a DAB using GaN and an into the transformer integrated series inductance are designed for an on-board vehicle charger. The DAB design and a GaN full bridge design are described. The parasitic drain source capacitance is measured and considered in the DAB design to determine the zero voltage switching (ZVS) boundaries. Three different transformer setups are compared and evaluated in praxis. Finally a map of losses and efficiency is created using once single phase shift (SPS) modulation and once triple phase shift (TPS) modulation.