分析开关功率变换器的一种新方法

A NEW APPROACH FOR SWITCHING POWERT CONVERTERS

本文提出一种分析非谐振武ＤＣ—ＤＣ开关功率变换器稳定状态的符号算法。这类系统用高阶时变微分方程来描述，然后利用等效小参量法原理导出原系统的等效线性方程组及其求解公式。这一方法可得到全符号数学式表示的解，容易导出输出波纹公式，通用性好，在工程上有重要的应用价值。

A symbolic algorithm for sWitching power converters is presented. This kind of circuits can be modeled with one or more higher-order time-variant differential eqUations. First, one derives a set of equivalent linear differential equations from the original equations using the principle of the equivalent small parameter method, then the symbolic solutions can be obtained. The solutions are all the symbolic expressions. The corrections and ripple are eStimated easily. The approach has been seen to be more useful in design of switching power converters than the method of state-space averaging.