| 摘要 |
PURPOSE:To provide a titled welding device which performs short circuit transfer type arc welding in arc welding in which a control signal and an output voltage correspond to each other by charging a capacitor in the stage of heating by short circuiting the current load with a current-voltage converting circuit and discharging the accumulated charge with a high voltage in the stage of increasing the voltage. CONSTITUTION:A three-phase input 1 is converted to DC by a voltage transformer 5 and a current rectifier 6 via a means 4 for regulating the output voltage and the DC voltage is arc-discharged 8. An inverter of a current-voltage converting circuit 13 is driven 11 by a means 14 for discriminating state so that the capacitor 33 of a means 15 for controlling current is charged in the stage of heating by short circuiting the current load on dropping of the voltage. Accumulated charge 33 is arc-discharged 8 by driving 11 the inverter with the circuit 13 when the voltage increases, by which the arc breakage is prevented and the stable control is accomplished. The self-control for the constant voltage arc is thus made effective and the need for compensation control is eliminated. |
