软开关Buck变换器混沌现象的研究  

Study on Chaotic Phenomena of Soft-switching Buck Converter

作　　者：石季英[1] 潘如政[1] 段大鹏[2] 潘春伟[3] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072 [2]江苏大学电气信息工程学院,江苏镇江212013 [3]山东建筑工程学院信电学院,山东济南250013

出　　处：《计算机仿真》2006年第4期309-313,共5页Computer Simulation

摘　　要：鉴于软开关DC/DC变换器的应用越来越广泛,由于谐振元件的存在使得变换器的混沌现象变得复杂。该文以BuckZVS PWM变换器为具体研究对象,建立了其精确离散数学模型,并基于此模型分析了Buck ZVS PWM变换器的混沌现象,利用稳定性判据求出给定系统的临界稳定值,通过电路仿真证明了混沌图与变换器运行状态基本一致。该文建立的精确离散数学模型是在数学通用公式的基础上建立起来的,因此可以应用于其它软开关DC/DC变换器混沌现象的研究。Given the fact that the Soft - switching DC/DC converter becomes more and more widely used, the chaotic phenomena of the Soft - switching DC/DC converter become complicated because of its resonance elements. This paper chooses Buck ZVS PWM converter as object of study. In addition, it sets up the precise discrete mathematic model in Buck ZVS PWM converter. Based on the model, chaotic phenomena of the converter are analyzed, and the system＇s critical stability value is obtained by using stabilization criterion. It proves that chaotic figure is nearly consistent with the status of converter through simulation. The model in this paper is based on the general formula, therefore, it can be applied to the study of other Soft - switching DC/DC converters＇ chaotic phenomena.

关 键 词：混沌 软开关 直流/直流变换器 离散数学模型 

分 类 号：TP117[自动化与计算机技术—控制理论与控制工程]