Excitation system for a welding current generator, particularly of a semi-conductor power diode type

摘要

An excitation system for a welding current generator, particularly, of a semi-conductor power diode type, adapted to be employed with generators characterized by a relatively great internal electric resistance, this system providing for controlling the steepness of the output volt-ampere characteristics of the generator, with the value of the idle voltage remaining constant. When the current values are comparatively low, the even system even provides for increasing the value of the idle voltages. The system also makes it possible to introduce remote control of the welding current. The generator has an output circuit connected to a power rectifier which in turn is connected to the excitation circuit of the generator. The output circuit is further connected through one or more transformers to the excitation circuit through a rectifier circuit including controls such as switches, adjustable resistors and/or adjustable inductances.