电焊机在使用过程中,常常需要变动焊接电流来适应不同的工作状况。我们使用的硅整流焊机(国产 ZS—500—1型)的电流调节,是靠一支瓷盘电阻调节磁放大器的电压来实现的。该瓷盘电阻装于机箱一侧,这对于远离焊机工作或高空作业是极为不便的。为了改变这一状况,我们采用可控硅整流元件,可使焊机实行远距离 Welding machine in use, often need to change the welding current to adapt to different working conditions. We use the silicon rectifier welding machine (domestic ZS-500-1-type) of the current regulation is based on a ceramic plate resistance to adjust the voltage of the magnetic amplifier to achieve. The ceramic plate is mounted on one side of the cabinet, which is extremely inconvenient for working or working away from the welder. In order to change this situation, we use SCR rectifier, welding machine can be implemented long-distance