SIMPLIFIED ANALYSIS OF PWM CONVERTERS USING MODEL OF PWM SWITCH .2. DISCONTINUOUS CONDUCTION MODE

被引：280

作者：

VORPERIAN, V

机构：

[1] Virginia Power Electronics Center, Dep't. of Electrical Engineering, Virginia Polytechnic Institute and State University, Blacksburg

来源：

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS | 1990年 / 26卷 / 03期

关键词：

D O I：

10.1109/7.106127

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

According to the method of state-space averaging, when a pulsewidth modulation (PWM) converter enters discontinuous conduction mode, the inductor current state is lost from the average model of the converter. In this work, it is shown that there is neither theoretical nor experimental justification of the disappearance of the inductor state as claimed by the method of state-space averaging. For example, when the model of the PWM switch in discontinuous conduction mode (DCM) is substituted in the buck, boost, or buck-boost converter while the inductor is left intact, the average model has two poles. The first pole fp1 agrees with the single pole of state-space averaging, while the second pole fp2 occurs in the range fp2 – Fs/A. It is also shown that the right-half plane zeros in the control-to-output transfer functions of the boost, buck-boost and Cuk converters in continuous conduction mode are also present in discontinuous conduction mode as well. © 1990 IEEE

引用

页码：497 / 505

页数：9