开关功率变换器中的间歇现象——仿真与实验

Intermittency in Switching Power Converters:Simulation and Experiment

文章从电路耦合滤波的角度考虑 ,分析了一类间歇分谐波与间歇混沌现象产生的原理 ,确定耦合电路传导和辐射干扰是产生该现象的根源 ,并构造了一个开关变换器模型作为研究对象 ,仿真与实验均得到了相似的非线性现象 ,同时对不同的电路参数集 ,讨论并分析了其对间歇现象产生所起的不同影响 ,为变换器的稳定设计提供信息 .该研究方法也可推广到其他非线性电路系统的类似研究中 .

This paper studies the phenomena of intermittent subharmonics and chaos in DC-DC converters according to the consideration of coupling filter, consequently concludes that the origin of intermittency comes from conducted or radiated EMI. By constructing a circuit model of switching converter coupled with spurious signal, simulation can gain the same results as those from experiment. Furthermore the paper discusses the different effect on intermittency induced by different sets of parameters, thus provides the design consideration of reliability. The same research method can also be used to study the intermittency in other types of nonlinear circuits and systems.