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辅助电流有源调整的新型ZVS全桥变换器

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Keywords: 零电压开关,全桥变换器,自调整

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Abstract:

基于一种辅助电流自调整的新型零电压开关(ZVS)移相全桥变换器。通过引入与滞后臂并联的有源辅助网络,该变换器可在全负载范围实现滞后臂的ZVS。辅助网络既不影响主功率的传输,同时辅助能量可随负载的变化进行自动调整,减小了辅助电路导通损耗,且辅助开关管控制简单。本文详细分析了该变换器的工作原理,给出了该变换器的拓扑简化方案和关键参数设计原则。在此基础上,设计完成了一台1kW/54V,开关频率为100kHz的原理样机,实验结果表明了该变换器的优点。

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