Separately power-feeding welding generator

摘要

A separately power-feeding welding generator having at least two main generating windings for supplying power to loads by rectifying an induced voltage and adapted to permit the power being fed from the two main generating windings to the loads to be separately controlled, in which a thyristor is provided in a rectifying circuit for rectifying a voltage induced in at least one of the two main generating windings; an a-c voltage detector for detecting the voltage induced in at least one of the two main generating windings and a thyristor control signal generator for controlling the conduction angle of the thyristor on the basis of the detected signal of the a-c voltage detector and the reference level obtained by extracting the level of the current being fed to the loads are provided; a diode which conducts when a positive half-wave is applied in parallel with the thyristor is connected in series with a resistor element; a first control power supply for rectifying a voltage induced in at least one of the two main generating windings to supply as a control voltage to the a-c voltage detector and a second control power supply which is electrically independent from the first control power supply and supplies a control voltage to the thyristor control signal generator are provided.