新型电流型双向功率流准Z源直流变换器

Novel Current-fed Bidirectional Power Flow Quasi-Z-source DC-DC Converter

为了提高直流电压变换器的稳定性和可靠性,针对传统Buck/Boost电路理论和实际应用上的缺陷,提出了一种电流型双向功率流准Z源直流变换器。这种新型变换器体积小、重量轻,具有电压增益高、输出电压稳定的优势,且在保留了升压、降压功能的同时,还可以实现功率流的双向传输,符合当今直流变换器向功能全面方向发展的趋势。采用脉冲宽度调制的方法,控制IGBT/Diode开关的导通时间,利用Matlab/Simulink仿真和实验电路的实验结果证实了这种新型变换器的合理性。

Gave the shortcomings of the traditional Buck/Boost circuit in theory and practical application,presented a current-fed bidirectional power flow quasi-Z-source DC-DC converter topology,in order to improve thestability and reliability of the DC voltage converter. The novel converter was small power volume and light weight. Ithad the advantages of high voltage gain and steady output voltage. Meanwhile,it could not only retain the function ofbuck-boost,but also realize the bidirectional power flow. So it conforms to the trend of nowaday DC converter,whichhas comprehensive functions. Adopted the method of pulse width modulation,in order to control IGBT/Diode switchon time. The Matlab/Simulink simulation results and the experimental results coming from the prototype confirm thefeasibility of the novel circuit topology.