In this study, a wide load range zero-voltage zero-current switching (ZVZCS) dual-active-bridge DC–DC converter using auxiliary parallel networks is proposed. The outstanding feature of the proposed converter is that all of the switches are allowed to operate with zero-voltage switching while four of the switches are allowed to operate with zero-current switching, due to the use of two auxiliary parallel networks, which were paralleled to two active bridges, respectively. Furthermore, the circulating current losses can be reduced significantly by using unified boundary trapezoidal modulation method. Based on these merits, the proposed converter has some advantages for the wide range load variation applications with less circulating current losses. The operation principles, soft-switching conditions and loss analyses comparison are given in this study. These benefits and characteristics mentioned above are verified from the experimental results by using a 1 kW prototype.

中文翻译：

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具有有源并联网络的双有源桥DC-DC转换器，适用于宽负载范围ZVZCS应用

在这项研究中，提出了使用辅助并联网络的宽负载范围零电压零电流开关（ZVZCS）双有源桥DC-DC转换器。所提出的转换器的突出特点是，由于使用了两个并联的辅助并联网络，所有开关均允许零电压开关操作，而四个开关均允许零电流开关操作。分别连接到两个活动桥。此外，通过使用统一边界梯形调制方法，可以显着降低循环电流损耗。基于这些优点，所提出的转换器在宽范围负载变化应用中具有一些优势，而循环电流损耗却较小。操作原理 本研究给出了软开关条件和损耗分析的比较。通过使用1 kW原型从实验结果中验证了上述这些好处和特性。