带磁放大器后级调整的变换器回路互扰分析

Analysis of Loop-interactions in DC-DC Converters with Magamp Post-regulation

多路输出DC/DC变换器通常存在多个闭环控制回路,回路自身的扰动很容易"耦合"至其它回路,从而造成系统失稳。简述了采用磁放大器后级调整技术的变换器工作原理,从控制角度分析了磁放大器控制回路与主回路之间互扰的产生原因以及抑制该类互扰的策略。

Multi-output DC-DC converters often need multiple control-loops to stabilize each output.Perturbations in one loop could be easily coupled with another loop ,which may destabilize the system if not treated properly.The principles of DC-DC converters with magamp post-regulation work is depicted,the phenomenon known as loop-interactions between main and auxiliary output loops is analyzed and the strategies to suppress them are proposed.