Remote Control Method of D.C. Arc Welding Machine

Abstract

Since olden times there were many attempts to control remotely d.c. arc welding machines, but many efforts were in vain because of the complexcity of the control mechanisms.
This paper describes a simpler control method which uses no relays and no control cables. The welding current is adjusted by a small a.c. motor whose control is carried out by connecting welding cables with a control box containing resistance. The remarkable feature of this method is that the control motor does not rotate reversely.
In this paper, the authors state three control circuits and explain the actual circuit of the motor-generator type d.c. arc welding machine.