移动式钢轨交流闪光焊专用晶闸管方波逆变器主电路分析

摘要

针对现有移动式钢轨交流闪光焊机系统三相负载不平衡和焊接波形不良的现状,研制一种新型的交流闪光焊专用晶闸管方波逆变器.通过主电路分析和样机试验证明,这种晶闸管方波逆变器能有效改善焊接波形,相比现有的钢轨交流闪光焊机晶闸管调压系统,可以节能30％以上.%Aim to current unbalanced three-phase loads and poor welding quality of flash-butt-welding system for mobile railway, this paper developed a new type square wave inverter dedicated to AC flash butt welding,the analysis and practice can prove that the SCR square wave inverter can improve welding waveform,and may save energy 30% or more compare traditional AC flash butt welding.