一種單級式半橋功率因數校正電路

摘要：　　本文介紹了一種具備零電壓(ZVS)開關特性及功率因數校正(PFC)功能的單級半橋變換器。該電路將BOOST電路與半橋電路結合在一起，克服了傳統兩級式電路的缺點�？捎行У慕档烷_關損耗，同時可以實現對輸入電流波形的整定，電路具有較高的功率因數。文中將對該電路的幾個典型特性進行驗證，給出其分析結果。 敘詞：零電壓(ZVS)開關特性、功率因數校正(PFC)、半橋變換器 Abstract：　　Zero-voltage-switching (ZVS) and single-stage power factor correction (PFC) half-bridge converter is presented in this paper. Boost stage and half-bridge stage are integrated into one stage, so it overcomes the drawbacks of conventional two-stage PFC circuits. The switching losses can be considerably reduced, and good input current shape and high power factor could be got. Several typical characteristics of this circuit will be analyzed and proved by experiment. The results will be given. Keyword：Zero-voltage-switching (ZVS)、power factor correction (PFC)、half-bridge converter