串联谐振变换器的扩展描述函数法建模研究  

Study of Modeling of Resonant Converter Based on Extended Describing Function Method

作　　者：吴俊娟[1] 孙孝峰[1] 邬伟扬[1] 

机构地区：[1]燕山大学,电力电子节能与传动控制河北省重点实验室,河北秦皇岛066004

出　　处：《电力电子技术》2011年第4期22-24,共3页Power Electronics

基　　金：国家自然科学基金资助(51077112);河北省自然科学基金资助(E2009000426)~~

摘　　要：采用扩展描述函数法建立了串联谐振DC/DC变换器的小信号等效电路模型。通过仿真得到了频率特性曲线,分析了电路主要参数,包括输入电压、品质因数、占空比和开关频率对系统频率特性的影响。然后搭建了实际电路,利用频率特性分析仪测量了基于移相控制的串联谐振变换器的频率特性,实验结果与仿真结果具有良好的一致性,说明应用扩展描述函数法可较为准确地对谐振变换器建模。Small-signal equivalent circuit of resonant converter is derived by extended describing function method.The curves of frequency domain are got through simulation.The influence of the major parameters such as input voltage,quality factor,duty ratio,and switching frequency are analyzed.Then,the experimental circuit was constructed and its frequncy-domain characteristics are measured,the experiment results are almost same with the simulation results,which demenstrated that extended describing function method for resonant converter is acurrate.

关 键 词：串联谐振变换器 扩展描述函数法 小信号等效电路 

分 类 号：TM46[电气工程—电器]