This paper presents an input-series hybrid dual active bridge (DAB) converter for efficiency improvement. The proposed converter is achieved by integrating a series resonant tank (SRT) into a single phase-shift (SPS) controlled DAB that shares one H-bridge at the secondary side. By using the super-resonant state of the LC tank, the phase correction of the secondary side H-bridge current can be obtained to realize zero voltage switching (ZVS), zero current switching (ZCS), and full load ZVS for the primary side bridges. In addition, the circulating current is reduced when compared to that of the traditional input-series DAB converter based on SPS control, which improves the overall efficiency. The system modelling and parameters design procedures are provided. Finally, a 1-kW experimental prototype was built, and the soft-switching performance was tested. The obtained results verify the effectiveness of the proposed topology and demonstrate a significant efficiency improvement.

本文提出了一种用于提高效率的输入串联混合双有源桥（DAB）转换器。通过将串联谐振电路（SRT）集成到在单个次级侧共享一个H桥的单相移（SPS）控制的DAB中，可以实现所提出的转换器。通过使用LC储能器的超谐振状态，可以获得次级侧H桥电流的相位校正，以实现零电压开关（ZVS），零电流开关（ZCS）和一次侧的满载ZVS桥梁。此外，与基于SPS控制的传统输入系列DAB转换器相比，循环电流减少了，从而提高了整体效率。提供了系统建模和参数设计过程。最后，建立了一个1kW的实验原型，并测试了软开关性能。获得的结果验证了所提出的拓扑的有效性，并证明了显着的效率改进。