Arc Welding Current Control Using Thyristor Based Three-Phase Rectifiers Applied to Gas Metal Arc Welding Connected to Grid Network

Abstract

The purpose of the welding operation is to ensure the continuity of the materials to be assembled in large industrial sectors. This study aims to suggest a topology of the Thyristor based three-phase rectifiers applied to the Gas Metal Arc Welding (GMAW) process connected to the grid network, the output currents are controlled and using various pulsed forms such as square, annealing, and spike pulse operations and investigate and compare between the effects of the three references welding currents structures on the welding current, welding voltage, droplet diameter, and welding quality. To have the best pulse operation, the amplitude and frequency are kept the same for all operations, the application of meshing graphs in the references of welding currents structures, welding current, welding voltage, and droplet diameter can illustrate a clear comparison between them. The simulation results show that the square pulse operation is the best among them. The Single-Sided Amplitude Spectrum (SSAS) method is also applied to the welding current and droplet diameter of the three operations under slow and rapid droplet detachment rates to estimate the droplet detachment frequency. The results show the great success of the SSAS in estimating the precise frequency.

Innovation in Welding in Terms of Processes, Weldability or Design Connections

“…The development of the pulsed arc continues to be carried out using other possible combinations, such as the dynamic response of wavelengths with current intensity and voltage, through the shape of the pulse, particularly the initial phase of its decay to improve detachment of gout [12]. There are several forms, such as the annealing pulse and the spike pulse (Figure 3a, b).…”

Characterization of an energy efficient pulsed current TIG welding process on AISI 316 and 304 stainless steels

“…The optimization of use of renewable energy has been addressed through several methods including maximum power tracking algorithm [ 18 ], power factor correction stage based on a bridgeless SEPIC converter for improved grid quality [ 19 ] and generation of low frequency pulsed current using line switched devices [ 20 ].…”

Fractional-Fuzzy PID Control Approach of Photovoltaic-Wire Feeder System (PV-WFS): Simulation and HIL-Based Experimental Investigation

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