What does a rectifier do in a welding setup?

A rectifier's primary function in a welding setup is to transform alternating current (AC) into direct current (DC). This process is crucial in many welding applications, particularly those using welding processes that require a stable and consistent arc, such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW).

Using DC can provide several advantages, including a smoother arc, better control over the weld pool, and the ability to weld a broader range of materials effectively. The rectification process allows for the welding power supply to use the advantages of both sources of current, converting the AC waveform into a constant flow of DC to improve the quality and efficiency of the welding process.

Understanding this function underscores the importance of rectifiers in creating optimal conditions for welding, contributing to both the technical aspects of the weld and the overall performance of the welding equipment.