摘要
随着开关频率的提高,单相全桥逆变器处于硬开关切换时的开关损耗也会明显增大,将导致逆变器处于低效率运行.为解决这一问题,提出了一种单相全桥三电平节能逆变器.通过设置辅助换流电路,利用谐振使主开关并联的电容的电压下降到零,主开关可实现零电压切换,而且在换流过程中,两组双向辅助开关可分别实现零电压切换和零电流切换.分析了电路的工作状态,实验结果表明主开关和辅助开关都能实现软切换.因此该单相全桥三电平逆变器可实现高效率运行.
When switching frequency increases,the switching losses in the single-phase full-bridge hard-switching inverter will also increase significantly so that the inverter is in low efficiency.In order to solve this problem,a single-phase full-bridge three-level energy-saving inverter is proposed.By resonance in the auxiliary commutation circuit,the voltage across capacitors in parallel with the main switches decreases to zero and the main switches could achieve zero-voltage switching.Furthermore,two groups of bidirectional auxiliary switches can achieve zero-voltage switching and zero-current switching respectively in the process of commutation.The working state of the circuit is analyzed.Experimental results show that the main switch and auxiliary switch can achieve soft switching.Therefore,the single-phase full-bridge three-level inverter can operate in high efficiency.
作者
王强
岳远韶
王天施
刘晓琴
WANG Qiang;YUE Yuan-shao;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)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2018年第12期3068-3072,共5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)
关键词
三电平
逆变器
零电压开关
零电流开关
双向开关
three-level
inverter
zero-voltage switching
zero-current switching
bidirectional switch
