Design and Fabrication of 60V, 50A, SCR Based Inverter Welding Machine

Abstract

Welding Technology has obtained access virtually to every branch of manufacturing; to name a few bridges, ships, rail road equipments, building construction, boilers, pressure vessels, pipelines, auto mobiles, aircrafts, launch vehicles and nuclear power plants. In the developing countries like India, Welding Technology needs constant upgrading, particularly in the field of industrial and power generation boilers, high voltage generation equipment, transformers in nuclear and aerospace industry. In the most common processes a high welding dc current is used with low voltage. Also an isolation transformer is needed for safety reasons because the work piece forms part of the electrical circuit. Due to equipment weight reasons it is desirable to utilize a high frequency transformer instead of the conventional transformer connected directly to the ac mains. The SCR based inverter welding machine can be used for manual metal arc welding , gas tungsten arc welding and gas metal arc welding.