| 摘要 |
PROBLEM TO BE SOLVED: To provide an output control method capable of forming an external characteristics having an inclination Ks [V/A] of the proper value in order to improve weldability in a pulse arc welding power supply unit. SOLUTION: The output control method of the pulse arc welding power supply unit that performs welding by forming the external characteristics having the inclination Ks of the proper value by controlling the output of the welding power supply unit so that the welding current average value Iw(n) during a period of time and the welding voltage average value Vw(n) during a period of time in the pulse period Tpb(n) of an nth time during welding can maintain the relationship of Vw(n)=Ks.(Is-Iw(n))+Vs by setting in advance the inclination Ks of the external characteristics and the welding current set value Is and the welding voltage set value Vs.
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