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首页> 外文期刊>Power Electronics, IET >High step-up dual full-bridge ZVS DC–DC converter with improved integrated magnetics and new resonant switched capacitor cell
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High step-up dual full-bridge ZVS DC–DC converter with improved integrated magnetics and new resonant switched capacitor cell

机译：高阶双全桥ZVS DC-DC转换器，具有改进的集成磁学特性和新型谐振开关电容器单元

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摘要

A high voltage gain dual interleaved full bridge converter with Zero Voltage Switching (ZVS), improved integrated magnetics, and a new resonant Switched -Capacitor-Cell (RSC) is presented. By taking the advantage of a new resonant switched capacitor cell and transformers with low turn-ratio as well as low leakage inductances, the desired high output voltage can be obtained. Furthermore, the output diodes operate in Zero Current Switching (ZCS) condition, and switches are maintained under ZVS condition over the whole range of output load variations. In addition, switches turn off near zero current leading to high overall efficiency. An interleaved approach (multi-cell) is adopted over a single cell to increase the power handling capacity. Furthermore, transformers of dual cells are integrated into a single UU core which cuts down the total volume of the converter as well as the total core loss. Since secondary windings have opposite polarities, there exists no DC flux, and the top and bottom RSC cells operate in 180 degree out of phase. Taking the aforementioned characteristics into consideration, the proposed converter has a good performance for high voltage applications. Experimental results of a 3 kw prototype with an output voltage of 16 kV validate the features of this topology.
机译：提出了一种具有零电压开关（ZVS），改进的集成磁学和新型谐振开关电容单元（RSC）的高电压增益双交错全桥转换器。通过利用具有低匝数比和低漏感的新型谐振开关电容器单元和变压器，可以获得所需的高输出电压。此外，输出二极管在零电流开关（ZCS）条件下工作，并且开关在整个输出负载变化范围内都保持在ZVS条件下。此外，开关在接近零电流时关闭，从而提高了整体效率。在单个单元上采用交错方法（多单元）以增加功率处理能力。此外，双电池的变压器被集成到单个UU磁芯中，从而减少了转换器的总体积以及总磁芯损耗。由于次级绕组具有相反的极性，因此不存在直流磁通，并且顶部和底部RSC单元的相位差为180度。考虑到上述特性，提出的转换器在高压应用中具有良好的性能。一个输出电压为16 kV的3 kw原型的实验结果验证了此拓扑的特性。

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