Basic Parts of a Welding Machine

Hunker may earn compensation through affiliate links in this story.

Welding machines are used to permanently connect metal pieces with heat generated from electrical energy. They are available in a variety of sizes and output voltages, from a small hobby model with an 80-amp output to an industrial model with a 12,000-amp output for spot welding.

Function

Welding machines take the electrical current from a high-voltage power source and convert it into a usable arc of energy to fuse two materials together.

Types

Welding machines are either constant current (CC) or constant voltage (CV). Constant current welding machines maintain a set current by changing up the output voltage. Constant voltage machines keep the voltage steady by adjusting the output current.

Transformer

Some welding machines use a transformer to convert the high voltage current from the wall outlet into a lower voltage current for output. The output current can then be adjusted within a certain range.

Alternator or Generator

Other types of welding machines use a motor or combustion engine to convert electrical energy into mechanical energy. An alternator or generator is then used to convert this mechanical energy into a low-current electrical output.

Inverter

Inverter welding machines produce the high voltages needed for high-intensity arc welding. The machine stores the high voltage current from the wall outlet in a capacitor. A microprocessor then switches the stored energy into a transformed where it is converted into the desired output current.


Denise Sullivan

Denise Sullivan has been writing professionally for more than five years after a long career in business. She has been published on Yahoo! Voices and other publications. Her areas of expertise are business, law, gaming, home renovations, gardening, sports and exercise.