What is the electrical power source used for arc welding?

The electrical power source used for arc welding is primarily transformers. Transformers are essential in this process as they convert the higher-voltage electrical supply from the power grid into a lower voltage, which is necessary for creating an electrical arc between the welding electrode and the workpiece. This transformation is crucial because the arc requires a specific voltage and current level to maintain the weld, enabling the melting of metals for efficient and effective joining.

Transformers also provide stable output even at varying loads, which is important in welding applications where the current demand can change quickly as the welder moves across the workpiece or adjusts the welding method. The use of transformers allows for consistent performance and reliable operation in creating the intense heat required for welding metals together. Other options, such as solar cells, capacitors, or batteries, do not typically provide the necessary sustained and controlled power levels needed for the arc welding process.