Contribution to Reconfigured Rectifiers Fed Gas Metal Arc Welding Process

Abstract

The welding process is among the most important technologies used and included in the world of manufacturing, related to welding and metals, there are several machines related to welding, among the most important, the most common, and the most recent of them is a machine of Gas Metal Arc Welding, it is fed by the static converter i.e. the rectifier. This paper deals with the study of the behavior of the welding machine GMAW in healthy and faulty cases, under the faulty case; the open-circuit fault occurs at the switches in one of two rectifiers. This paper proposes the inclusion of a new method for diagnosing the faults; it adopts the threshold band technique for early detection of open-circuit faults related to Thyristor switches, it also depends on the polar coordinates technique to accurately locate the faulty switches. Therefore, this paper proposes the installation of fault-tolerant rectifiers. The results obtained in this manuscript demonstrate the efficacy of each of the proposed diagnostic methods the fault-tolerant rectifiers included, all this contributed to ensuring the smooth running of the welding process; by maintaining the work-piece on one hand and the other hand, protecting the network from current distortions caused by open-circuit faults.