Dual-Active-Bridge Converter With Parallel-Connected Full Bridges in Low-Voltage Side for ZVS by Using Auxiliary Coupling Inductor
Dual-Active-Bridge Converter With Parallel-Connected Full Bridges in Low-Voltage Side for ZVS by Using Auxiliary Coupling Inductor
复制标题
使用辅助耦合电感器在低压侧并联全桥实现 ZVS 的双有源桥转换器
DOI：
10.1109/tie.2018.2877145
复制
发表时间：
2019
影响因子：
7.7
通讯作者：
Sha Deshang
中科院分区：
文献类型：
--
作者：
Guo Zhiqiang;Sha Deshang
提出了一种低压侧全桥并联的双有源桥式(DAB)变流器。耦合电感集成到两个低压侧全桥中，用于在全负载范围内进行零电压开关(ZVS)操作。通过对变流器工作模式的分析，得出了变流器的ZVS范围。为了折衷零电压开关和耦合电感引起的导通损耗，根据零电压开关范围的边界条件设计了调制轨迹。比较了该变流器与传统的DAB并联变流器的导通损耗，结果表明该变流器的导通损耗只在小负载下增加。最后，搭建了一台1.2 kW的实验样机来验证所提出的变流器和调制方案，证明了零电压开关性能和效率的显著提高。
A dual-active-bridge (DAB) converter with parallel-connected full bridges in low-voltage side is proposed in this paper. A coupling inductor is integrated into the two low-voltage-side full bridges for zero-voltage-switching (ZVS) operation throughout full-load range. By analyzing the working modes of the converter, the ZVS range of the converter is derived. To compromise the ZVS and the conduction loss caused by the coupling inductor, the modulation trajectory is designed in terms of the boundary conditions of the ZVS range. The conduction loss of the proposed converter is compared with the conventional parallel-connected DAB converter, which illustrates that the conduction loss of the proposed converter is only increased under light loads. Finally, a 1.2-kW experimental prototype is built to verify the proposed converter and the modulation scheme, which demonstrates the remarkable ZVS performance and efficiency improvement.