A welding power source is the device in a welding machine that supplies the electrical energy required for welding and possesses suitable electrical characteristics for welding. It is widely used in shipbuilding, machinery, automotive, power, chemical, and other manufacturing industries.
In CO2 gas shielded welding, welding power sources typically employ flat or gradually decreasing external characteristics, with an open-circuit voltage of 38–70V and strong arc self-regulation. Modern welding power sources are developing towards digitalization and inverter technology, such as using medium-frequency three-phase inverter technology to improve efficiency and stability, and developing processes such as low spatter and cold arc short-circuit transfer.
Welding power sources play a crucial role in the welding process; they are the fundamental equipment for achieving welding. They are responsible for providing stable and adjustable current, voltage, and power, ensuring the welding arc burns continuously and stably, thereby completing the welding task. There are many types of welding power sources, including AC welding machines, DC welding machines, gas shielded welding machines, and plasma welding machines, each suitable for different welding needs and scenarios. For example, AC welding machines are suitable for simple welding work, while DC welding machines can handle more complex welding tasks. Gas-shielded welding machines can protect the quality of the weld during the welding process and are suitable for high-quality welding. Plasma welding machines are more suitable for high-precision and high-difficulty welding applications.
