2kW新型推挽正激直流變換器的研制

摘要：本文介紹了一種新型推挽正激電路的工作原理，對環流過程進行了透徹分析，分析了箝位電容和變壓器原邊漏感對電路工作的影響。通過仿真和實驗對所述理論分析進行了驗證�；�于此研制出輸入電壓24-32VDC，輸出電壓120VDC的2kW 直流變換器樣機，典型效率為93.2%,表明該電路具有可靠、效率高的特點，適合于低壓大電流輸入中大功率應用場合。 敘詞：推挽 推挽正激 直流變換器 Abstract：In this paper, the operating principle of a novel push-pull forward(PPF) is introduced. The problems of freewheeling current are detailed. Analysis and simulation is performed ,with the results that, the proper selection of clamping capacitor, transformer leakage inductance are critical to the proper working of the converter. Based on the above analysis ,A prototype of 2kW PPF is fulfilled , with the typical efficiency of 93.2%.The experimental results confirm that the novel converter is very suitable for low-voltage, high- current applications. Keyword：Push-pull Push-pull forward DC/DC converter