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How does an inverter welder work?


How does an inverter welding machine work?

Inverter welding machines are suitable for all arc welding processes such as MIG/MAG, electrode and plasma welding. Depending on the power output, the inverter welding machines are connected to the mains supply with one or three phases. The basic principle of an inverter corresponds to that of a switched-mode power supply.

More comfort with inverter welding machines

How does an inverter welding machine work?

Inverter welding machines are a special type of inert gas welding machines, but the inverter welding machines work in the same way. Inverter welding machines have the advantage of being much lighter than conventional welding machines and work very safely.

In contrast to the normal gas-shielded welding machines, which need an extra transformer to be started up, inverter welding machines do not need one, because the heavy transformer is replaced by semiconductor technology and the control is done by a small potentiometer, which controls the electronics in the inverter welding machine.

Inverter welding machines work with direct current, which has the advantage of a slower melting of the materials with more power despite the same amperage.

Welding with direct current

Because inverter welding machines work with direct current, all types of electrodes can be welded. Due to the electronically regulated welding current, inverter welders also offer better welding properties and can be used for many metals. Due to their compact design and light weight, inverter welders are mostly used on construction sites and commercially, as they provide more power with less weight.


Easy to transport

In contrast to conventional MIG, MAG and TIG welding machines, inverter welding machines are more expensive to purchase, but are much easier to transport. In addition, the efficiency of inverter welding machines is more efficient than that of other welding power sources.

Various special functions thanks to the latest technical innovations

How does an inverter welding machine work?

Due to the higher operating frequency of inverter welding machines, highly dynamic welding processes can be regulated much more precisely, whereby various comfort functions can be realised, such as the hot-start function, which prevents the stickiness of the rod electrode through short-term superimposition of the welding current and warms up the start of the welding seam more quickly, or the anti-stick function.

At which the system delivers the maximum current shortly before the short circuit, which prevents the electrode from annealing or sticking. In addition, an inverter welding unit can be used to electronically regulate the arc so that the set current value is automatically increased continuously as soon as the arc shortens.

This allows the arc length to be kept almost constant.

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