PWM Buck变换器电容引起的混沌及其控制  

Chaos and chaotic control varied with capacitance in PWM Buck converter

作　　者：金爱娟[1] 徐向丽[1] 李少龙[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《电源技术》2015年第1期141-143,146,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金面上项目(61074016);上海市教育委员会科研创新项目(09YZ214)

摘　　要：大多数关于变换器分岔和混沌的研究都是以电源电压作为变量进行分析和控制的,而实际中电容也影响到系统的分岔和混沌。以PWM模拟电压控制Buck变换器为研究对象,利用计算机仿真电路得到以电容为自变量的分岔图;利用硬件实验电路对单周期稳定、倍周期分岔和混沌3种不同状态进行相图分析;采用参数扰动实现混沌控制,由分岔图可知原来的三种不同状态均被控制为单周期稳定状态,从硬件实验得到的时域波形图验证了控制算法的有效性。In many studies, the bifurcation and chaotic phenomena of converters were obtained with input DC voltage as parameters. But in practice, the bifurcation and chaos were also influenced by the capacitance. Buck converter with analog voltage PWM control Loop was explored. First, the bifurcation diagrams of buck converter vaded with Capacitance were given by computer simulation. Secondly, three different states including single cycle stability, period-doubling bifurcation and chaos were analyzed by phase diagrams using hardware circuit experiment. Finally Ott-Grebogi-Yorke was used as a chaotic control scheme. It could be seen in bifurcation diagrams that all the three different states before were changed to be single cycle stability. It was verified by the experimental time domain waveform figures.

关 键 词：混沌 分岔 BUCK变换器 相图 

分 类 号：TM46[电气工程—电器]