WELDING POWER SOURCE SYSTEM

To provide a welding power source system for submerged arc-welding, which can stabilize a shape of a tip of an electrode after finishing the welding.SOLUTION: A welding system A1 for performing submerged arc-welding comprises: a welding power source device 2 that has an inverter circuit 25 and supplies electric power; a wire feeding device 5 that feeds a welding wire; and a control device 1 that controls the welding power source device 2 and the wire feeding device 5. The control device 1 makes the wire welding power source device 2 output AC currents during welding, makes the wire feeding device 5 stop feeding the welding wire when finishing the welding, and makes the welding power source device 2 output end-currents which are DC currents, where an end-current period of time from start to stop of output of the end-currents is set.SELECTED DRAWING: Figure 1 【課題】溶接終了後の電極の先端の形状を安定させることができる、サブマージアーク溶接の溶接電源システムを提供する。【解決手段】サブマージアーク溶接を行うための溶接システムＡ１において、インバータ回路２５を有し電力を供給する溶接電源装置２と、溶接ワイヤを送給するワイヤ送給装置５と、溶接電源装置２およびワイヤ送給装置５を制御する制御装置１とを備えた。制御装置１は、溶接中には、溶接電源装置２に交流電流を出力させ、溶接終了時には、ワイヤ送給装置５に溶接ワイヤの送給を停止させて、溶接電源装置２に直流電流であるエンド電流を出力させ、エンド電流の出力開始から停止までのエンド電流期間を設けている、【選択図】図１