一種新穎的零電壓轉換PFC變換器設計

摘要：提出了一種帶有源鉗位的ZVT-PWM升壓PFC變換器。詳細分析了該變換器的工作原理，討論了電路的參數，進行了軟件仿真，并在一臺功率為3kW、工作頻率為100kHz的通信用開關電源裝置上進行了實驗驗證。仿真和實驗結果都證明了這種變換器不僅可實現主開關管的零電壓轉換和輔助開關管的零電流開關，而且開關管的電壓電流應力非常小，同時變換器效率可高達94%. 敘詞：變換器 有源鉗位 零電壓轉換 零電流開關 軟開關 Abstract：A novel single-phase active-clamped Power Factor Correction converter is presented in this paper. The operation principle and the circuit parameters of the converter are analyzed in detail. The proposed scheme is verified on the 3kW prototype converter operating at 100kHz.Simulating and experimental results proved that this circuit not only realizes the ZVT of the main switch and ZCS of the auxiliary switch, but also has the low current and voltage stress, meanwhile, the overall efficiency of the proposed converter is 94%. Keyword：converter; active-clamp; ZVT; ZCS; soft switching