用符号法分析恒频电流模控制的变换器闭环系统的稳态  

Steady-State Analysis of Closed-Loop Constant-Frequency Current-Mode Controlled Converters Using Symbolic Method

作　　者：陈艳峰[1] 张光昭[1] 丘水生[2] 

机构地区：[1]中山大学电子与通信工程系,广东广州510275 [2]华南理工大学电子与信息学院,广东广州510640

出　　处：《电子学报》2002年第11期1589-1592,共4页Acta Electronica Sinica

基　　金：国家教委高校博士点专项基金 (No.0 0 0 561 0 7) ;广东省自然科学基金 (No .990 585)

摘　　要：将等效小参量符号分析法推广到恒频电流模控制的变换器闭环系统的稳态分析中 ,提出了占空比的精确确定法及简化确定法 .其中 ,前者不需要有波形线性及小纹波假设 ,具有广阔的适用性 .而后者对工程简化分析具有重要意义 .所得结果均为符号表达式 。An extension of the equivalent small parameter symbolic method to constant frequency current mode controlled converter systems is presented,along with two methods of determining the system's duty ratio,the precise and the simple methods .It is shown that the former is practical due to its having no assumptions of linear inductor current waveforms and small output ripples,and the latter is useful for simplified engineering analysis.The resulted analytical expressions are helpful to understand the mechanism of the circuit.

关 键 词：符号法 变换器 电流模控制 开关功率变换器 闭环系统 占空比方程 

分 类 号：TN624[电子电信—电路与系统]