Welding machine inverter. Which one is better for the house?
A very convenient and practical equipment that is worth buying for home use is an inverter welding machine. Which one is better suited for amateurs and for periodic repairs? The question is quite interesting. The choice of a welding unit is carried out according to several parameters, but first you need to understand how such equipment is arranged and how it works.
Inverter equipment. Device and characteristics
We are all used to using the words welding machine to represent a huge box with a transformer in its device. It is this part of the equipment that is responsible for generating a current of quite a large force, which puts it into operation and supports the welding arc. An inverter-type device is capable of reproducing the same process, only in this version the current is generated by the inverter.
Inverter equipment is much more complicated than outdated transformer models. In it , the network current passes through four stages of conversion:
- straightening, smoothing with a special filter;
- conversion of current to alternating current with high frequency;
- voltage reduction with parallel current increase even up to 250A;
- current rectification.
For this purpose, the presence of a network filter, rectifiers and frequency converters in the equipment is provided. The high current values obtained at the output are capable of creating a fairly powerful arc that easily melts almost any metal.
Classification of inverters
Depending on the purpose, devices with different output current indicators are used. They are usually divided into:
- low-power (140-160 A);
- medium-capacity (160-200 A);
- high-power (200-250 A).
The first ones are the weakest, their use is reduced to the creation of small cosmetic seams and work with metal having a small thickness. Medium–power units are quite common, easily cope with large volumes and produce fairly high-quality connections. High-power can be attributed to professional equipment, they are used if welding of metal surfaces with a large thickness is required.
Power is a rather important indicator that you need to focus on when choosing equipment such as an inverter welding machine. Which one is best suited for the house is, of course, up to the buyer to decide, but it is worth focusing on other characteristics.
Useful advice! It is necessary to work with the welding inverter only in a special mask. Powerful light rays can damage vision.
Types of inverters by welding type
Inverters are also divided according to the type of welding modes:
- manual welding arc (MMA);
- semi-automatic (MIG/MAG);
- argon welding (TIG);
- plasma cutting (CUT).
Equipment with MMA marking is perfect for home conditions. This type of welding inverters is characterized by low weight, but at the same time it is almost ideal for solving any household tasks. You will need to purchase the most ordinary electrodes for it.
Semi-automatic welding machines are mainly used on a production scale and are completely unsuitable for the home. The power and dimensions of such equipment are much higher. The principle of its operation is to feed a special wire to the arc, resulting in a weld.
Welding with an argon arc unit is a rather complicated process. Special tungsten electrodes are used for it, and arc formation occurs when interacting with an inert gas. Such equipment is quite expensive and its use at home is simply impractical, as well as the use of the following type of devices. Plasma cutting units, in fact, are not welding units, although they work in about the same way as an inverter welding machine. Which is the best option for use at home is now more or less clear.
Additional functions of the welding inverter and its advantages
For beginners in welding, additional functions that facilitate work will be useful. Almost all inverters increase the current strength at the start of operation, resulting in a powerful starting arc. This is the so-called “hot start” function. Its presence allows you to start working immediately after turning on the unit.
It’s not bad if such a welding machine has an “anti-sticking” function. The equipment automatically lowers the operating current at the moment when the electrode is seized. After its separation, all parameters are restored. Another convenient function is the forcing of the welding arc. It allows you to get a high-quality arc with minimal metal splashing.
Useful advice! Often, with the first experience of working with a welding machine, it is not possible to create a good arc. To make it work, you need to strike an electrode on the metal surface, as if with a match.
Besides the fact that the inverter greatly facilitates welding work, it can work with different electrodes. It copes perfectly with materials such as cast iron, stainless steel, non-ferrous metals.
Welding machine inverter. Which one is better in terms of technical parameters?
When choosing an inverter device, you need to pay attention to other equally important parameters. A fairly important indicator is the input voltage range. The ideal unit will be with the specified voltage from 170 to 250 V or with an acceptable deviation of about 15%. The operation of such a device will not depend on voltage fluctuations in the network.
The duration of activation is usually indicated as a percentage. If the value of this indicator is 60%, it means that after 10 minutes of operation of the equipment, it will need a rest of about 4 minutes. If this parameter is exceeded, the built-in protection will work and the device will turn off.
An equally important parameter is the diameter of the electrode. It is best to select a model that works with 4-5 mm electrodes. Their use allows you to create better seams while reducing stress.
Useful advice! When purchasing a welding inverter, you also need to pay attention to the location of a service center nearby. In case of a breakdown, specialists will quickly help to cope with the problem.
Proven manufacturers and models
The German company FUBAG has proven itself well in the welding machine market. Among its models, you can choose a unit of any power both for work at home and for professional welders. The ideal choice for the home will be FUBAG IN 163. Such devices are insensitive to voltage fluctuations, allow you to create a smooth and beautiful seam without splashing metal droplets. They are equipped with an efficient ventilation system, have built-in overvoltage protection. It is very easy to use, equipped with the functions “quick start”, “anti-sticking”, as well as “arc force”.
The Italian brand Telwin has long gained a reputation as a quality manufacturer. The operation of inverters of this company is made from 220V. The distinctive features of Telwin units are considered to be light weight and compactness. The TELWIN FORCE 165 inverter has all the functions necessary for a beginner, greatly simplifying the work. Easily copes with voltage surges in the range of 15%. Such equipment consumes little electricity, has a reliable cooling system. Any type of electrodes are suitable for it.
ProfHelper produces good welding inverters. A whole line of aggregates, called Prestige, is in quite high demand. The Prestige 181S inverter is one of the most common models. It is compact, it can be carried on the shoulder, which allows you to work even in hard-to-reach places. He is not afraid of voltage fluctuations. The standard set of functions: “hot start”, “anti-sticking”, “forced arc” allow even a beginner in welding to create high-quality, reliable seams.
If you plan to carry out some work on the arrangement of metal structures yourself at home or on a suburban plot, then it is impossible, by the way, to buy such equipment as an inverter welding machine. Which one is better — the buyer should choose. After reading this article, you can not be afraid to make a mistake in choosing.