Small-signal model of PWM converters for discontinuous conduction mode and its application for boost converter

被引:71
作者
Reatti, A [1 ]
Kazimierczuk, MK
机构
[1] Univ Florence, Dept Elect & Telecommun, I-50139 Florence, Italy
[2] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA
来源
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS | 2003年 / 50卷 / 01期
关键词
boost converter; discontinuous conduction mode; general averaged small-signal circuit model; pulsewidth-modulated (PWM) converters; right-half plane (RHP) zero;
D O I
10.1109/TCSI.2002.805709
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A small-signal circuit model for pulsewidth-modulated dc-dc converters operated in discontinuous conduction mode is presented. The model is composed of controlled current sources, an independent voltage source and resistances. The principle of energy conservation approach is used to take into account parasitic resistances of the transistor and diode and the diode threshold voltage. The proposed model is suitable for small-signal, frequency-domain representation of the converters. This model is used to derive the expressions for a boost converter control-to-output transfer function, input-to-output voltage transfer function, input impedance and the output impedance. Bode plots are also given for these transfer functions. The predicted and experimental results were in excellent agreement.
引用
收藏
页码:65 / 73
页数:9
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