單相單級功率因數校正變換器的綜述

摘要：本文對單級功率因數校正的電路拓撲、控制方法作了綜合闡述，分析其存在的問題，給出了幾種解決方案。最后提出了一種新型的單級功率因數校正電路，實現了功率開關管的軟開關，具有高功率因數、低電流諧波，開關損耗小、變換效率高、并限制了電壓尖峰減小EMI。 敘詞：單級功率因數校正 連續工作模式 不連續工作模式 電容電壓 Abstract：This paper briefly reviews the single-stage power factor correction (PFC) based on the circuit topology and control strategy, analyses the problem and give some schemes to solve At last, a new single-stage PFC circuit is mentioned respectively, they achieved soft-switching of power switches high power factor, low input current distortion, low switching loss, high efficiency,　limited the voltage spike and reduced the EMI. Keyword：power factor correction (PFC) continuous conduction mode (CCM) discontinuous conduction mode (DCM) the voltage of capacitor