中文摘要：

提出了一种适用于高压输入的高可靠性推挽正激变换器.两个正激单元通过公共磁芯耦合,变压器磁芯双向磁化、提高了磁芯利用率;开关管和二极管串联构成开关桥臂,实现了开关管两端电压钳位,同时实现了变压器漏感能量回馈,而且从电路结构上消除了开关桥臂短路直通的隐患,具有开关器件电压应力低、效率高、可靠性高等优点.详细分析了变换器的工作原理和特性,并通过实验验证了理论分析的正确性.

英文摘要：

A novel push-puU forward converter is proposed for high input voltage and high reliability applications. The converter is constructed by series connecting and coupling two forward cells via an integrated magnetizing core. Switches＇ voltage stress of this converter is clamped at input voltage and the leakage energy and magnetizing energy of the transformer are recycled. In addition, high reliability can be guaranteed since no direct-short path existed in the converter. All these features make the proposed PPFC suitable for high-reliability, high-input voltage, and high power density power conversion applications. Operation principle and detailed analysis of the proposed converter are given and verified with experimental results.