On the Analysis of Quasi-Discontinuous Modulations for Dual-Active-Bridge

The dual-active-bridge is a DC/DC converter that is widely used due to its design flexibility. Diverse modulations have been used to extend the soft-switching range, reducing the RMS current or improve the overall performance. In this paper, the analysis of different quasi-discontinuous conduction modulations for the DAB converter is made. The analysis considers the RMS current, the displacement angles calculation, and the softswitching conditions to establish a design guide for the modulations analyzed. Four modulations were considered. Simulation and experimental results are presented.