有源鉗位正激變換器雙環小信號建模分析

摘要：根據狀態空間平均法建立了有源鉗位正激變換器連續導電模式下的小信號模型，以此分別得出等效功率級傳遞函數和電壓環路傳遞函數，并且使用MATLAB軟件繪制了系統傳遞函數的幅頻特性曲線并分析了鉗位電路對系統傳遞函數幅頻特性曲線的影響，最后對環路進行了補償設計。 敘詞：有源鉗位正激變換器 雙環 峰值電流 小信號 Abstract：A small signal model of active clamp forward fedback-flyback convert with CCM mode is built by state-space averaging approach. The transfer functions of equivalent power and open-loop voltage are presented, respectively. The amplitude-frequency curve is ploted by the Matlab simulation, and the analysis of the influence of the active-clamp circuit is also presented. Last, the feedback loop compensation design is given. Keyword：Active-clamp forward converter, Double circle, Peak current, Small signal