基于描述函数法的谐振变换器自持振荡研究  

Study of the Self-sustained Oscillation of Resonant Converter Based on 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,秦皇岛河北066004

出　　处：《电力电子技术》2011年第2期53-55,共3页Power Electronics

基　　金：河北省自然科学基金项目资助(E2009000426)~~

摘　　要：谐振变换器是一种强非线性系统,自持振荡是非线性系统中经常出现的现象。这里以基于自持振荡控制的串联谐振变换器为研究对象,首先分析了自持振荡控制模式的工作原理,然后将非线性理论中的扩展Nyquist稳定判据和扩展描述函数法引入到系统分析中,推导出系统产生自持振荡的条件,并分析了自持振荡点的稳定性,接着推导了自持振荡控制模式下系统的静态特性,最后通过实验验证了系统的优良性能。Resonant converter is a strong nonlinear system,in which the phenomenon of self-sustained oscillation often takes place.The resonant converter based on self-sustained oscillation control is studied.Firstly, the control principle of the system is analyzed.The condition of the occurrence of the self-sustained is derived, and the stability of the self- sustained oscillation can be investigated by using the extended Nyquist stability criterion.The static characteristics of the circuit are analyzed.Finaly, experimental results are given to demonstrate the good performance of the system.

关 键 词：谐振变换器 自持振荡控制 描述函数法 

分 类 号：TM461[电气工程—电器]