节能型谐振直流环节逆变器  

An Energy-Saving Resonant DC Link Inverter

作　　者：王强[1,2] 郭国先[1,2] 王天施 刘晓琴[1,2] WANG Qiang;GUO Guo-xian;WANG Tian-shi;LIU Xiao-qin(College of Information and Control Engineering,Liaoning Shihua University,Fushun,Liaoning 113001,China;National Experimental Teaching Demonstration Center of Petrochemical Process Control,Fushun,Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学信息与控制工程学院,辽宁抚顺113001 [2]辽宁石油化工大学石油化工过程控制国家级实验教学示范中心,辽宁抚顺113001

出　　处：《电子学报》2020年第9期1860-1863,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.51207069);辽宁省自然科学基金指导计划项目(No.20170540586);辽宁石油化工大学国家级科研项目培育基金(No.2016PY-016)。

摘　　要：为改善逆变器的运行效率,提出了一种节能型三相谐振直流环节软开关逆变电路,在直流环节增设了辅助电路.当主开关需要切换时,提前使辅助电路进入谐振状态,将直流环节电压变化到零,保证主开关完成零电压软切换,并且辅助开关也能完成软切换.通过控制辅助开关切换的间隔时间来调节直流环节电压保持为零的时间,使逆变器能根据需要来调整脉宽调制策略.详细说明了电路的工作过程.实验结果表明逆变器主开关和辅助开关能完成软切换.因此,该拓扑结构对于研发高性能谐振直流环节逆变器具有借鉴意义.An energy-saving three-phase resonant DC(Dired Current)link soft-switching inverter is proposed to improve efficiency of the inverter.The auxiliary circuit is added on the DC link of the inverter.When the main switches need be operated,auxiliary circuit enters into the resonance state in advance.The voltage across DC link changes to zero so that the main switches can achieve zero-voltage soft switching.Besides,the auxiliary switch can also achieve soft switching.By controlling the interval time of the operation of the auxiliary switches,the zero-state duration of the DC link voltage can be adjusted so that various flexible pulse width modulation strategies can be applied in the inverter.The workflow of the inverter is analyzed.The experimental results show that the main switch and the auxiliary switch can achieve soft switching.Therefore,the topology is of reference for the development of high-performance resonant DC link inverters.

关 键 词：逆变器 直流环节 谐振 软开关 效率 

分 类 号：TM464[电气工程—电器]