焊接与切割设备的使用和维修(四十二)——电阻焊机的安装、使用与维修

Usage and maintenance of welding and cutting machines(42)——Installation,use and maintenance of resistance welding machine

详细分析了变频式直流点焊机逆变主电路及其发生“直通”的原因。并提出了减少存贮时间;一晶闸管截止后,另一晶闸管才被导通;限制基极驱动脉冲宽度等3种方法防止A类“直通”。

It analyzes the invert main circuit of frequency conversion DC spot welding machine and the reason of 'Direct Through' in detail.Also,some methoeds such as reducing storage time;one transistor is conducted after another is closed;limiting drive pulse-width of base-electrode to prevent 'Direct Through' are put forward.