直接功率轉換在單級PFC AC/DC變換器中的應用

摘要：　　本文對現有的應用直接功率轉換（DPT）技術的單級 PFC AC/DC變換器進行了深入的分析和綜合，闡明了它們的直接功率轉換的機理和實現方法。分析表明，應用DPT技術不僅可以有效地降低單級PFC AC/DC變換器直流母線電壓，而且也較大地提高其效率，使其在小功率的應用中具有更大的前景。 敘詞：單級PFC AC/DC變換器 直接功率轉換 效率 直流母線電壓 Abstract：　　This paper analyzes and synthesizes the current topologies of single-stage PFC DC/DC converters with the direct power transfer(DPT) technology,and describes mechanism and implementation of the DPT technology.　The result obtained shows that applying DPT technology to the single-stage PFC AC/DC converters can not only effectively decrease their DC bus voltage ,but also improve their conversion efficiency,so they are more promising in low power application. Keyword：single-stage PFC AC/DC converter;direct power transfer; efficency;DC bus voltage