During the operation of an electric welding machine, heat is generated at the impedance of the conductor due to the current passing through it, which is based on the principle of Ohm's law (U=IR). Therefore, a large amount of heat is generated during the welding process, which increases the internal temperature of the welding machine. If there are problems with the welding machine circuit, cooling system, radiator, etc., it may cause the internal temperature of the welding machine to not decrease in a timely manner, leading to overheating.