摘要：引入一種雙向開(kāi)關(guān)前置的單相升壓APFC變換器拓?fù)�，把雙向開(kāi)關(guān)放置在整流橋前端，較好的解決了傳統(tǒng)單相升壓APFC變換器電路置后的升壓電感直流偏磁問(wèn)題。本文介紹該電路的結(jié)構(gòu)，分析研究電路的各種工作狀態(tài)，對(duì)該拓?fù)溥M(jìn)行了小信號(hào)建模，最后利用Matlab軟件對(duì)該變換器電路進(jìn)行了仿真分析。 敘詞：雙向開(kāi)關(guān)；功率因數(shù)校正；Matlab仿真 Abstract：A prepositional bidirectional Switch,single-phase ,boost, active-power-factor-correction converter topology is introduced in this paperThe bidirectional switch is placed before the rectifierThis paper analyses and investigates the topologys structure and various work station, establishes the small signal modeling of the topology and also simulates the converter withMatlab software. Keyword：bidirectional witch; power factor correction; Matlab simulation