有源箝位正反激变换器的小信号建模与分析

Modeling and Small Signal Analysis of Active Clamp Forward-flyback Converter

在考虑各种寄生参数的情况下,基于平均状态空间法建立了有源箝位正反激变换器连续导电模式下的小信号模型,以此得出变换器的开环传递函数,并给出了补偿网络设计原则和方法,通过Matlab仿真验证了其具有良好的动态性能和静态特性。根据理论分析设计了一台3.3V/30A试验样机,实验结果验证了理论的正确性。

Based on a consideration of parasitical parameters,a small signal modeling of active clamp forward-flyback converter with CCM mode is build by using the state-space averaging approach.The feedback loop compensation design principle and approach are presented based on the open loop transfer function.The Matlab simulation shows a good dynamic response and static characteristic.At last a 3.3 V/30 A prototype was built,the experimental results verified the theoretical predictions.