無輸入整流橋的單級PFC變換器

摘要：介紹了一種新的單級功率因數校正拓撲，結構簡單，成本低，效率高。采用無橋Boost實現PFC功能同時集成半橋DC/DC變換器。分析了其工作原理并給出了仿真電路圖和結果，另外還討論了降低儲能電容電壓的方法。 敘詞：功率因數校正 無橋Boost DC/DC變換 Abstract：This paper presents a new power factor correction (PFC) method for Bridgeless Boost converter integrating dc/dc converter. The proposed topology has fewer components and improves the efficiency. The paper analyzes the basic principle of the circuit and gives the simulated circuit and results. At last discuss the method of low down the stress of bulk capacitor. Keyword：PFC Bridgeless Boost DC/DC converter