CIRCUITS FOR IMPROVED WELDING PERFORMANCE

摘要

PROBLEM TO BE SOLVED: To provide circuits for improved welding performance.SOLUTION: The invention includes a system comprising: a welding power conversion circuit 210 configured to convert an input current to an output current; and a plurality of switches and corresponding current paths. The current paths include at least: a positive polarity main switch 211 on a positive polarity current main path, the positive polarity current main path including a welding path from an electrode to a workpiece; a positive polarity auxiliary switch 214 on a positive polarity current auxiliary path and a polarity transition auxiliary path; a negative polarity main switch 212 on a negative polarity current main path, the negative polarity current main path including the welding path from the workpiece to the electrode; a negative polarity auxiliary switch 213 on a negative polarity current auxiliary path and the polarity transition auxiliary path; and an independent discharge control switch 622 on an independent discharge control current path.SELECTED DRAWING: Figure 6