基于动态相量法的PWM DC/DC变换器的建模与分析方法

摘要

This paper presents the details involved in constructing the models of PWM DC/DC converters operating in continuous conduction mode（CCM） using the dynamic phasors.A systematic method is presented including large-signal circuit models,ripple calculation,model simplification using SMA,and small-signal circuit models.As an example,a procedure of modeling the PWM BUCK/BOOST Bi-directional DC/DC Converter is detailed,the simulation results are presented to show the effective of this method.%文章从动态相量的概念以及基本性质出发,推导了动态相量法应用于PWM DC/DC变换器建模与分析的数学方法。首先介绍了纹波的计算方法,引入了选择模式分析法对PWM DC/DC变换器动态相量模型进行简化,建立了小信号模型,并以PWM BUCK/BOOST双向DC/DC变换器为例,用MATLAB软件建立了PWM DC/DC变换器的动态相量模型,将之与时域仿真模型进行了比较,验证了该方法的有效性。