摘要
H桥变换器是一类被广泛应用于电力电子领域的重要拓扑,存在复杂的非线性现象,探索其非线性行为的产生机理具有重要的理论和实际意义。研究电流峰值控制型H桥直流斩波器的分岔和混沌现象,建立电流峰值控制H桥直流斩波器的离散映射模型,分析平衡点的稳定性,给出了系统稳定运行参数域。分析边界碰撞分岔和混沌演化过程及其产生机理,推导出碰撞边界线的解析表达式,指出发生边界碰撞的根本原因在于开关变换器占空比的有界性。数值仿真和实验验证了理论分析的正确性。
H-bridge converter, an important topology widely applied to power electronic system, has complex nonlinear phenomena. It has important theoretical and practical significance to explore mechanism of nonlinear behaviors in H-bridge converter. Bifurcation and chaos phenomena in H-bridge DC chopper under peak-current programmed were studied. Iterative maps of H-bridge DC chopper were derived. Fixed points＇ stability was investigated and steady state operation parameters area was schemed. The evolvement and mechanism of border-collision bifurcations and chaos were analyzed after the collision border line was studied. Results show the limitation of duty cycle is the fundamental cause of non-smooth bifurcations. Simulation and experimental results show that the theoretical analysis is correct.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2009年第9期22-27,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(60474066)
国家863高技术基金项目(2007AA05Z229)
广东省自然科学基金重点项目(8251064101000014)~~
关键词
H桥直流斩波器
边界碰撞
离散映射
特征乘子
李亚普诺夫指数
H-bridge DC chopper
border-collision
discrete maps
characteristic multipliers
Lyapunov exponent
