Output-Series Connected Dual Active Bridge Converters for Zero-Voltage Switching Throughout Full Load Range by Employing Auxiliary LC Networks
Output-Series Connected Dual Active Bridge Converters for Zero-Voltage Switching Throughout Full Load Range by Employing Auxiliary LC Networks
复制标题
输出串联双有源桥式转换器通过采用辅助 LC 网络在整个负载范围内实现零电压开关
DOI：
10.1109/tpel.2018.2869859
复制
发表时间：
2019
影响因子：
6.7
通讯作者：
Song Keling
中科院分区：
文献类型：
--
作者：
Guo Zhiqiang;Sha Deshang;Song Keling
本文提出了一种采用双辅助LC网络的输出串联双有源桥（DAB）变换器，用于高输出电压的高效零电压开关（ZVS）。双辅助LC网络集成到转换器中，用于全负载范围内的ZVS。输出侧开关的门信号可以控制LC网络中的电流。通过对变换器工作模式的分析，根据ZVS范围的边界设计了变换器的调制轨迹。辅助LC网络引起的导通损耗根据电压和负载功率进行调节。该调制方案可以实现相邻工作模式之间的无缝转换。将该变换器的导通损耗与传统的输出串联型DAB变换器进行了比较。虽然在轻负载下导通损耗增加，但所有开关都能达到零电压。降低开关损耗可以提高整体效率。最后，建立了一个1.3 kW的实验样机，验证了所提出的变换器和调制方案的有效性，证明了ZVS的性能和效率的提高。
This paper presents an output-series connected dual active bridge (DAB) converter for efficient zero-voltage switching (ZVS) by employing dual auxiliary LC networks in high-output voltage applications. The dual auxiliary LC networks are integrated into the converter for ZVS throughout full load range. The gate signals of the output side switches can control the current in the LC networks. By analyzing the working modes of the converter, the modulation trajectory is designed in terms of the boundaries of the ZVS range. The conduction loss caused by the auxiliary LC networks is adjusted according to the voltage and load power. The modulation scheme can achieve seamless transition between the adjacent working modes. The conduction loss of the proposed converter is compared with the conventional output-series DAB converter. Although the conduction loss is increased under light loads, all the switches can achieve ZVS. The reduced switching loss can improve the overall efficiency. Finally, a 1.3 kW experimental prototype was built to verify the effectiveness of the proposed converter and the modulation scheme, which demonstrates the ZVS performance and efficiency improvement.