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一种基于变压器串联和新型辅助网络的ZVS移相全桥变换器

, PP. 95-101

Keywords: 移相全桥,变压器串联,电压互补性,辅助网络,零电压开关

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Abstract:

为了适合高压输入、低压大电流输出场合的直-直变换,提出了一种基于变压器串联的移相全桥变换器,且在该拓扑上加入电压互补性辅助网络,利用该辅助网络对输入电压和负载电流的自适应能力实现开关管全负载范围的零电压开关。详细分析了该变换器的工作原理及特性,并对电路关键参数进行了设计。在此基础上,设计完成了一台1.4kW(28V/50A)、开关频率为100kHz的原理样机,实验结果验证了该种拓扑的优点。

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