Not so long ago, the welding machines of a new type appeared in specialized stores - inverter. Many models from different manufacturers makes you think: what welding inverter to buy? We will tell about what a welding inverter is about its advantages and what to pay attention to when choosing.

Advantages and disadvantages of welding inverters

The characteristics of the apparatus for technical and technological should be divided. First include:

• high efficiency (about 90%), which means the minimum electricity consumption at the maximum possible amount of work performed;
• economical flow of electrodes;
• a wide range of welding and cutting currents allowing thin electrodes (up to 2 mm);
• "Soft" welding - without a spray form;
• smooth adjustment of operation mode;
• cables are not heated during welding or cutting of metal;
• comparatively small dimensions and weight, which makes it easier to transport.

Technological advantages of welding inverters:

• the ability to work with any coated electrodes on constant and alternating current;
• welding is performed by a short arc, due to which the energy loss decreases, and the quality of the seam is improved;
• the possibility of welding various metals, including those of others;
• the "hot start" function allows you to avoid the "fitting" of the electrode at the beginning of the welding process;
• do not require highly qualified specialist skills from the welder.

The disadvantages are also not deprived of the welding inverter. Reviews of the negative plan about such devices are as follows:

• high cost compared to other types of welding machines;
• more expensive repair: Replacing the powerful output transistor inverter may cost half of the entire device (such damage occurs when the voltage is critical);
• it is afraid of dust: it is necessary to contain the device clean and periodically clean;
• operation is not desirable under reduced temperature: condensate can derive electronics;
• keep the inverter is needed in a dry, warm place.

Principle of action of the welding machine inverter

The basis of the work of the welding process circuit is the following processes.

1. The device is connected to the AC network (frequency - 50 Hz), which passes through the rectifier and the smoothing filter to the inverter. The filter is a throttle with a condenser.
2. The inverter produces a high frequency alternating current - up to 50 kHz.
3. Rectifier for high frequencies straightens the resulting current that creates an arc. The process is controlled by a special IGBT block.

Thus, due to the transformation of AC, industrial frequency in high-frequency current, it becomes possible to achieve the necessary values \u200b\u200b(up to 160 a) of the welding currents. In this case, the mass of the welding machine is reduced by about 10 times.

Welding inverter: What is better? Recommendations for choosing

When choosing a welding machine, you should pay attention to the following points.

1. It is desirable that the device is equipped with protection against voltage drops. As a rule, this uses a cutting relay configured in the range of 180 - 260 V.
2. In order to protect against dust, settling on all nodes and elements of the welding machine, some manufacturers use the tunnel ventilation method. It consists in a special layout of the components of the device. At the same time, its cost increases significantly. For household devices, such costs will be superfluous. It is enough to periodically remove the dust with a brush, removing the housing.
3. Spectaring a specific model, you should contact the service center with the question of the presence of printed circuit boards. If they can provide "under the order", which means that this model is reliable. If the Center's employees find it difficult to inform the dates for the parts - it is better not to acquire such a welding machine.
4. It is necessary to clarify the temperature range at which a specific model of the welding inverter is running. Information about this can be found on the site and in the manufacturer's catalog. If the data on the lower limit is missing - it is not necessary to operate the device at temperatures below 0 ° C.
5. If the welding inverter is classified as "household", then, after each period of continuous operation, it is necessary to withstand the pause to 1 hour. Otherwise, the term "household" does not characterize the device as low-quality. Acquire such a device should not be afraid.
6. False options prescribed in the accompanying documentation, such as "hot start" or "anti-welding", should not attract attention. This is the natural function of welding inverter.
7. The device may have additional features, such as charging batteries. Pay for such functions only if you use them.
8. It is recommended to purchase an inverter with a power reserve. Often, the voltage in the network is lowered and therefore, in order for the device for sure it is possible to boil a metal with a thickness of 3 mm, a model can be purchased capable of cooking metal 4 mm.

What company to buy a welding inverter

Depending on the purpose, welding inverters are classified into the following types:

• for repair and installation work;
• for industrial use;
• for use in microelectronics.

For household use, the first-type devices are better suited. Inverters offer welding inverters from various manufacturers in the trading network, the price does not depend on the quality. Most of all the cost is influenced by production production. There are other signs of a good manufacturer:

• well-developed service;
• availability of catalogs, website;
• proper registration of documentation (instructions in the country language, available outline of material);
• availability of quality certificate.

Overview of some models of welding machines of different manufacturers

Welding inverter Resanta

The line of the trade of this Chinese trademark is represented by Sai models 315, Sai 250, Sai 220, Sai 190, and Sai 160.

1. Sai 315 - industrial use and connects to a three-phase electrical network. But its technical parameters allow it to use it for domestic purposes.
2. Sai 250 - connects to the network of 220 V, but is characterized as one of the most powerful due to which is also universal. The same applies to the model of Sai 220.
3. The SAI 190 and SAI 160 models are different only by the upper revergence limit (190 and 160 amp, respectively). These are convenient devices that are easy to transport. Thanks to compactness and low weight.

Cable inverter Arc.

The model range of the devices of the Svarog brand are produced in metal and plastic housings. The latter are in demand for plumbers, thanks to the best protection against moisture (ARC 160 II and ARC 200 II).
For use for domestic purposes (in the country, in the garage), the devices are no longer suggested by Arc 125 and Svarog Arc 145. It is worth noting that the figures in the marking do not correspond to the maximum values \u200b\u200bof welding currents that are 120 and 140 and respectively. The most powerful model of single-phase - Arc 250 (welding current - 225 A).

Welding inverter MMA

Supports of this type are operated in DC mode. The representative of the welding inverters of the household purpose is the "Dnipro-M" mini MMA 210 Ukrainian production. A low weight (no more than 2.5 kg) and compact dimensions of 200 × 90 × 130 mm make this device convenient to use.

Your attention video review of the welding inverter.

Welding inverter Fubag

The welding inverter of German production FUBAG is distinguished on the background of the other optimal combination of sizes and power. FUBAG inverters are not afraid of voltage jumps. The newest microprocessors respond to the work of all systems.

FUBAG 200, FUBAG 203 and FUBAG 163 are characterized by increased reduced voltage resistance: thanks to the new IGBT output module manufacturing technology, they can work when the supply network voltage is dropped to 100 V. The devices are maintained: when the central microcircuit fails to be replaced.

In order to get more complete information about FUBAG welding inverters, you should read the video:

Using the information set out in the article, you can select the inverter welding machine that is most suitable for the scheduled work.