30kHz IGBT逆变焊机主电路设计  

Analysis and design for the main circuit of 30 kHz IGBT inverter welder

作　　者：洪兆林 陈克选[1] 袁亮文 常春梅[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《电焊机》2015年第6期17-20,共4页Electric Welding Machine

摘　　要：焊机逆变频率的提高可改善焊机控制精度及动特性。但频率提高后会产生开关损耗增加、IGBT开关应力加大、电磁干扰变强等问题。研制的30 k Hz逆变MIG焊机采用全桥ZVZCS主电路,对频率提高后主电路逆变器谐振参数、IGBT选择、高频变压器、输出电抗器等进行了系统分析和设计计算。最后还给出了为提高焊机可靠性而设计的驱动与保护电路。The dynamic characteristics and control precision can be improved by increasing the inverter welder＇s frequency.However, some problems,such as the increase of switching losses and IGBT switch stress,strong electromagnetic interference and so on,are happened after the inverter wehler＇s frequency increases.In this paper,30 kHz inverter MIG welder is developed by using ZVZCS full bridge.The main circuit inverter resonant parameters,IGBT selection,high frequency transformer and output reactor are designed and calculated.The drive and protection circuits are designed to improve the reliability of welder.

关 键 词：高频化 逆变 损耗 控制精度 

分 类 号：TG434[金属学及工艺—焊接]