The welding materials and solder materials on the welding electrode are used to fuse the welding material and the welding material in the instantaneous short circuit. The structure of the welder is very simple. It is simply a large power transformer, which turns 220V ac power into low voltage, power supply of large current, can be dc or communicate.

The electric welding transformer has its own characteristic, which is the characteristic that has the voltage drop sharply. The voltage drop after the welding electrode is ignited, in... The working voltage of the welding machine is adjusted. In addition to the voltage change of 220/380, the secondary coil also has a tap changing voltage, which can be adjusted by iron core.

Electric welding machine is usually a large power transformer, using the principle of inductance, inductance in on and off they produce a great voltage change, using positive and negative poles in instantaneous short circuit when the high voltage arc to melt the solder on the electrode. To achieve the purpose of make them combine. Apply the voltage between the electrode and the workpiece, and use the energy of the arc to melt the electrode and the heating of the mother material by scratching or touching the ignition arc.