基于切换线性系统的DC-DC变换器的输出能控性研究

将DC-DC变换器视为一类混杂动态系统——切换线性系统,尝试在DC-DC变换器控制系统研究中引入切换线性系统的概念,基于系统模型研究DC-DC变换器的输出能控性这一基本控制特性,为各种控制策略在DC-DC变换器中的应用奠定理论基础.研究分为三个部分:(1)引入切换线性系统,并以基本的DC-DC变换器为例,建立变换器的切换线性系统模型;(2)给出切换线性系统输出能控性的定义以及充要条件;(3)分析基本DC-DC变换器的输出能控性,并以Buck变换器为例进行仿真分析和验证验证.本文的研究还表明,分析方法也适应于其它功率变换器,甚至所有开关变换电路的输出能控性研究.

Output Controllability Study on DC-DC Converters as Switched Linear Systems

DC DC converters were considered as one type hybrid dynamic systems (HDS) switched linear systems (SLS) and the concept of switched linear systems was introduced to DC DC converter controlled systems.Based on systematical model,output controllability (OC) of DC DC converters was studied which provides the basis of modern control method application in DC DC converters.At first,the concept of switched linear systems was introduced and the basic DC DC converters were built as switched linear system models.Then the output controllability definition and its sufficient and necessary criterion for switched linear systems were given.At last,the output controllability of basic DC DC converters was analyzed.The simulation analysis and experimental verification of output controllability for Buck converter was given as an example.The analysis method of output controllability for DC DC converters could be extended to other power converters or all switched circuit to study the output controllability.