GH-75 hydrogen atom welding machine circuit

GH-75 hydrogen atom welding machine circuit

Hydrogen atom welding utilizes the arc generated between two non-melting tungsten electrodes WG protected by hydrogen gas, and the welding wire
melts and welds the workpiece in the area protected by hydrogen. Since hydrogen has a strong cooling effect on the arc
, making it difficult to pass the arc, the welding power source requires an
arc starting voltage higher than 300V . The secondary no-load voltage of the GH-75 hydrogen atom welding machine is 300V, the working
voltage is 100V, the rated welding current is 75A, the welding current adjustment range is
20~100A, and the rated output is 22. 5kV. A. The rated duty cycle
is 65%, the efficiency is 75%, the power factor is 0.36, and the tungsten electrode diameter is
1.5~3mm. The circuit of
    GH-75 hydrogen atom welding machine is shown in the figure.
    In the figure, the solenoid valve Y is used to control the on and off of hydrogen;
the intermediate relay KAz is used to control the continuation of the welding circuit; the reactor L is
used to adjust the welding current; the foot switch SB2 is used to disconnect the welding power supply.