摘要
PFC电路为双环控制,电压反馈环的输出信号要作为电流环的参考,所以电压反馈环响应比较慢,在启动时会存在较大的输出过冲。该文提出了一种在经典2型误差放大器基础上的电压环优化设计,可以有效消除PFC电路的输出过冲,并通过软件仿真验证了效果。
PFC circuit has two control loops and the voltage loop's output signal is the reference of current loop,so the crossover frequency of the open loop gain is low,there will be a larger output overshoot.A preference method for designing voltage feedback loop based on the classical type 2 error amplifier is given in the article.This method contributes to calm down the output overshoot.Simulation studies show the correctness of theoretical analysis.
出处
《电子质量》
2017年第6期14-17,共4页
Electronics Quality
关键词
PFC
电压反馈环
输出过冲
PFC
voltage feedback loop
output overshoot
