| 摘要 |
PROBLEM TO BE SOLVED: To provide an output control method for forming external characteristics having an inclination Ks [V/A] of the optimum value for the purpose of improving welding performance in a power unit for pulsed arc welding. SOLUTION: In the output control method for a pulsed arc welding power unit, the inclination Ks of external characteristics is preliminarily set, as are a welding current setting value Is and a welding voltage setting value Vs, and the output of the welding power unit is controlled in the manner that a welding current average value Iw(n) of one period and a welding voltage average value Vw(n) of one period in the n-th pulse period Tpb(n) during welding maintains a relation of Vw(n)=Ks.(Is-Iw(n))+Vs. The external characteristics having the inclination Ks of the optimum value are thereby formed for welding to be performed.
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