西南交通大学学报 2012, 47(3) 400-405 DOI:   10.3969/j.issn.0258-2724.2012.03.008  ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
反激变换器
谷值电流控制
庞加莱映射
分岔图
本文作者相关文章
何圣仲
PubMed
Article by He,K.Z

谷值电流控制反激变换器的非线性现象

何圣仲, 许建平, 吴松荣, 周国华, 王金平

西南交通大学电气工程学院, 四川 成都 610031

摘要

为了选取DC-DC变换器的参数,建立了谷值电流控制反激变换器动力学方程和离散映射模型,利用分岔图和庞加莱映射,研究了其复杂的非线性动力学行为,并对基于谷值参考电流和输入直流电压变化的稳定性和分岔特性进行了分析.通过Matlab/Simulink平台构造了相应的时域仿真模型,得到了谷值电流控制反激变换器的时域波形和相轨图.研究结果表明,谷值电流控制反激变换器存在非线性动力学行为,变换器随着电路参数的变化,从稳定状态经过倍周期分岔和边界碰撞分岔进入混沌状态.

关键词 反激变换器   谷值电流控制   庞加莱映射   分岔图  

Nonlinear Analysis and Simulation of Valley Current Controlled Flyback Converter

HE Shengzhong, XU Jianping, WU Songrong, ZHOU Guohua, WANG Jinping

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract:

For parameter design of switching DC-DC converters, dynamic equations and a discrete mapping model of valley current controlled flyback converter were established, and its complex nonlinear dynamic behaviors were investigated using bifurcation diagram and Poincaré map. In addition, the stability and bifurcation property for valley reference current and DC voltage were analyzed. The time-domain waveform and phase portrait were obtained through time domain models constructed under Matlab/Simulink. The results show that valley current controlled flyback converters have complex nonlinear dynamic behaviors. As circuit parameters vary, the converter changes from steady state to chaos by double period-double bifurcation and border-collision bifurcation.

Keywords: flyback converter   valley current control   Poincaré   map   bifurcation diagram  
收稿日期 2010-12-20 修回日期  网络版发布日期 2012-05-29 
DOI: 10.3969/j.issn.0258-2724.2012.03.008
基金项目:

国家自然科学基金资助项目(51177140);中央高校基本科研业务费专项资金资助项目(SWJTU11BR033, SWJTU11CX032)

通讯作者:
作者简介: 何圣仲(1975-),男,讲师,博士研究生,研究方向为开关电源技术,电话: 18782018682, E-mail: szhe_0@swjtu.cn

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