PROJECT TITLE :

High-Efficiency DAB Converter Using Switching Sequences and Burst Mode

ABSTRACT:

Dual active bridge converters enable bidirectional power flow in buck and boost operating modes. This paper presents a complicated switching sequence and burst-mode strategy to balance conduction, switching, and magnetic losses under light-weight, medium, and serious loading conditions, leading to improved operating efficiency. The implementation of the switching sequence employs the natural state-plane trajectories of the converter and contributes to higher potency and the flexibility to perform burst mode. The proposed switching sequences improve the potency of the converter by enabling soft switching and adjusting the frequency to match the minimum RMS transformer current in the total operating vary. Furthermore, it incorporates a absolutely controlled burst-mode switching sequence for lightweight loading conditions to further extend the potency gains. Hence, maximum potency is obtained by cashing in on all the doable switching structures of the converter. The analysis provides insight into the natural trajectories of the converter, which produce soft-switching transitions and enable the converter structures to realize the target operating point directly. Simulation and experimental results are presented to validate the advantages of the switching sequence and illustrate the burst-mode operation.