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Analysis, design and control of a resonant forward-flyback converter

机译:谐振前反激式转换器的分析,设计和控制

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A resonant forward-flyback converter is proposed in this paper, in which the high efficiency resonant forward part delivers most of the power and the flyback part achieves tight regulation and magnetic resetting. Operating characteristics are analyzed in detail. As the key design parameters, this paper studies the influence of transformer's turns-ratios on component stress and power loss. A minimum duty cycle control strategy (Dmin-fs) is proposed to guarantee ZCS of forward diode and valley switching. An experimental prototype of 400V input 48V output is built to verify the analysis. The prototype achieves a high efficiency of 96 % at 120W output.
机译:本文提出了一种谐振前反激式转换器,其中高效率共振前部赋予大部分电力,反激部分达到紧密调节和磁性重置。详细分析了操作特性。作为关键的设计参数,本文研究了变压器匝数比对元件应力和功率损耗的影响。提出了最小占空比控制策略(DMIN-FS),以保证前向二极管和谷切换的ZC。建立了400V输入48V输出的实验原型以验证分析。原型达到120W输出的高效率为96±%。

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