差动Buck-Boost直流变换器型高频环节逆变器  

Differential Buck-Boost DC-DC converter mode inverter with high frequency link

作　　者：陈道炼[1] 陈亦文[1] 张灵改[1] 

机构地区：[1]福州大学电力电子与电力传动研究所,福建福州350108

出　　处：《电机与控制学报》2010年第11期13-19,共7页Electric Machines and Control

基　　金：福建省自然科学基金重点项目(E0620002);中国高校博士学科点基金项目(20060386002)

摘　　要：从差动结构的角度提出了差动Buck-Boost直流变换器型高频环节逆变器电路拓扑,该逆变器是由2个相同的、输出反相低频正弦脉动直流电压的高频电气隔离双向Buck-Boost直流变换器以差动电路构成。针对该逆变器的特点采用电压瞬时值反馈互补双向控制策略。给出了逆变器稳态工作时的4种工作模式,根据4种工作模式分析逆变器在一个低频输出电压周期内阻性、感性和容性负载下的稳态工作原理。利用开关状态等效电路进行分析计算得到了不同占空比下的逆变器标幺外特性,给出了关键电路参数的设计。实验结果证实了此逆变器及其控制策略的正确性与可行性。A circuit topology of differential Buck-Boost DC-DC converter mode inverter with high frequency link is proposed.The inverter consists of two same isolated Buck-Boost DC-DC converters with differential mode.The two converters output two low-frequency sinusoidal pulsating DC voltage waveforms with 180°phase difference.And it adopts the instantaneous value feedback complementally control strategy of output voltage.Four modes are given when the inverter keeps in the steady state.According to the four modes,the resistance,inductive and capacitive load of the steady principle of the inverter when the inverter works in a low frequency voltage cycle are analyzed.By analyzing the switching status equivalent circuit,it can deduce the normalized output characteristic curve of the inverter with the different duty cycles,and it also gives the parameters of the key circuit.The correctness and feasibility of the inverter and control strategies are verified by the experimental results.

关 键 词：Buck-Boost直流变换器 拓扑 差动 高频环节逆变器 

分 类 号：TM46[电气工程—电器]