摘要
混沌是非线性系统中的普遍现象,DC-DC开关功率变换器是一类在现实中大量应用的强非线性系统,其中必然也存在着各种混沌与分叉现象。为了揭示DC-DC开关功率变换器运行状态失稳过程中的规律,本文研究了电流模式控制的Buck变换器分叉序列。首先,对基于电流模式控制的Buck变换器的状态方程,利用龙格-库塔(Runge-Kutta)算法进行仿真,取每个时钟脉冲时刻的电路状态变量构成庞加莱截面,画出在参考电流变化方向上的分叉图;然后,利用离散映射迭代法推导出电流模式控制的Buck变换器分叉序列中各分叉点的值;最后,通过理论推导出的值与仿真结果对比,发现二者比较吻合。
Power converters are practical nonlinear systems which apply in many electronic products and equipments.It has been shown that the operation of power converters can easily become chaotic and bifurcate when they fail to maintain normal periodic operation.To get the regulation of losing stability in the operational process of DC-DC converters the author studied the bifurcation series of a Buck converter controlled under current-mode.At first,based on the state equation of Buck converter,the Runge-Kutta arithm...
出处
《电测与仪表》
北大核心
2008年第5期44-48,共5页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(60402001)
关键词
BUCK变换器
分叉序列
分叉点
离散映射
Buck converter
bifurcation series
bifurcation point
discrete map
