This work presents a comparative study of DAB converters in Full-Bridge, Half-Bridge and hybrid configurations, focusing on modulation strategies that minimize losses while maintaining ZVS. Both configurations are analyzed under equivalent conditions using the same number of GaN devices. Two optimization approaches are investigated: one based solely on conduction losses, and the other including other relevant losses. The results show that conduction loss based optimization yields total losses close to those obtained with the total losses optimization. While the two topologies exhibit similar performance at high-load, they have different efficiency performances in other operating points, and that in some operating regions the Half-Bridge and hybrid configuration could outperform the Full-Bridge configuration. The results suggest that topology selection should be guided by the expected operating range. Experimental validation confirms the numerical analysis, showing alignment in waveforms and efficiencies.
