准Z源升压变换器的软开关技术仿真研究  

Simulation Study of Soft Switching Technology for Quasi-Z-source Boost Converter

作　　者：夏鲲[1] 曾彦能 葛越[1] 李肖迪 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《系统仿真学报》2015年第3期656-661,共6页Journal of System Simulation

基　　金：国家自然科学基金项目(51207091/E070303)

摘　　要：在具有相同输入电压、开关管占空比相等的条件下,准Z源升压变换器拓扑可以提供比传统升压变换器拓扑更高的输出电压,具有效率高、实用输出电压范围广的优点。在准Z源升压变换器的基础上设计了一种软开关电路,用辅助开关管代替原拓扑中的二极管,实现了主开关管的零电压开通。在MATLAB/Simulink环境下对该软开关电路进行了仿真。仿真结果表明,改进后的准Z源升压变换器能降低主开关管的开关应力与续流二极管的通态损耗,增强了系统的稳定性,可以提高开关器件的使用寿命。With the same input voltage and duty cycle, quasi-Z-source boost converter can provide higher output voltage than traditional boost converter. It has the advantages of high efficiency, wide range of practical output voltage. A quasi-Z-source boost converter topology with soft switching technology was proposed. Using assist switch replaced the diode of original topology, which could accomplish the zero voltage switching on state of the main switch. The MATLAB/Simulink simulation results show that the new topology can reduce the switch stress of main switch and increase the system stability, also it can prolong the life time of switching devices.

关 键 词：准Z源升压变换器 软开关技术 开关应力 系统仿真 

分 类 号：TM46[电气工程—电器]