Boost变换器的环路补偿设计

Design of Loop Compensation for Boost Converter

在DC-DC变换器的设计中,为了使得整个电路有一个更好的动态性能和静态性能,需要对整个控制环路进行补偿设计。但是,目前这种环路补偿的参数基本上都是通过实验的方法获得而没有进行定量的计算。本次设计以Boost变换器为例,采用波特图法对工作在CCM模式Boost变换器进行稳定性分析,通过定量计算得出动态补偿的参数,使其存在足够的相位裕量来保证稳定工作。最后通过Matlab工具对补偿后的Boost变换器绘制Bode图,验证补偿网络设计的正确性。

In the DC-DC converter design,in order to make the whole circuit has a better dynamic performance and static performance,the need for the entire control loop compensation design. However,the current parameters of the loop compensation are basically obtained by experimental methods without quantitative calculation. In this design,Boost converter is used to analyze the stability of the Boost converter working in CCM mode by using the Bode diagram method.The dynamic compensation parameters are obtained by quantitative calculation,so that there is enough phase margin to ensure stable operation. Finally,through the Matlab tool to compensate the Boost converter Bode diagram,verify the correctness of the compensation network design.