PWM DC-DC开关变换器建模、仿真分析研究  

Modeling Approach and simulation Analysis of PWM dc-dc Converter

作　　者：曹文思[1] 杨育霞[1] 

机构地区：[1]郑州大学电气工程学院,河南郑州450002

出　　处：《微计算机信息》2007年第32期291-293,共3页Control & Automation

基　　金：河南省教育厅自然基金项目(2006470007)

摘　　要：DC--DC开关变换电路是一个时变的、非线性的动态系统,它的分析与设计一直是一个难题。以典型PWM Boost变换器为例进行了三种方法建模,首次将高频网络平均法推广到PWM开关变换器中,并建立了低频模型,对状态空间平均法、推广的高频网络平均法、等效小参量法得到的数学模型以及原电路模型应用MATLAB进行了仿真和波形对比,定性得出其适用范围,所采用的建模方法可推广应用于其他变换器。DC-DC switching converters are time-variant and non-linear dynamic system,its analyse and design is a difficult problem, the typical PWM Boost converter nonlinear model is built up using three models, Based on the method of ＂High Frequency Network Averaging＂,an unified approach to modeling PWM converters mode operation is proposed. Low frequency behavior models are derived. This paper compares waveforms of simlations of the converter circuit models and mathematic models by MATLAB software ,and discusses the applicable conditions of the three models,These models are very suitable for other converters.

关 键 词：升压变换器 状态空间平均法 等效小参量法 仿真 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]