IGBT弧焊逆变器低频啸叫剖析及消除  

Analyses and Elimination of Lower Frequency Whistle of IGBT Welding Converter

作　　者：皮佑国[1] 常云龙[1] 程韬波[1] 黄石生[1] 

机构地区：[1]华南理工大学,广州510641

出　　处：《沈阳工业大学学报》1998年第6期56-58,共3页Journal of Shenyang University of Technology

摘　　要：PWM调制的IGBT弧焊逆变器因IGBT存在导通时间，而在小负载时产生低频啸叫，具有恒流特性的弧焊逆变器必须设置最小导通比dmin限制才能消除低频啸叫，理论上要求dmin≥ton，以保证系统运行在PWM范围内．IGBT welding converter with PWM in lower load since IGBT has its switch-on time. Inorder to eliminate the whiste,a minium conducting rasio Dmin be set and dmin≥ton fmust besaticefide so that the converter can work in PWM scope.

关 键 词：IGBT弧焊逆变器 电弧焊 低频啸叫 电源设备 

分 类 号：TG434.1[金属学及工艺—焊接]