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.
出处
《电力电子技术》
CSCD
北大核心
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)~~
关键词
串联谐振变换器
扩展描述函数法
小信号等效电路
series resonant converter
extended describing function method
small-signal equivalent circuit
