基于UC3846间接电流型控制的分析与实现

Analysis and Realization of Indirect Current Mode Control based on UC3846

分析研究了基于电感或变压器绕组电压积分的间接电流型控制技术。该技术通过对电感或变压器绕组的电压积分,可以将交变的脉冲波转化为三角波。该三角波能表征开关电流的变化规律,因此可以作为PWM的三角载波,从而实现占空比的调节。此外,将间接电流型控制技术与单周期控制技术作了比较。选用新颖的推挽正激式电路进行了实验验证,并按此方案制作了实验样机。

This paper analyzes and researchs on Indirect Current Mode Control based on integration of inductor voltage or transformer＇s winding voltage to transfer the pulse to a triangle wave,which is as a token of the varied character of the switch＇s current.So the triangle carrier can be used as PWM adjust duty ratios. Furthermore it is compared to the One-Cycle Control.