Inverter welding machines: circuit. Selection of welding equipment

Old transformer welding machine from the modern inverter device differs quite strongly. The second option is more compact, and its use in everyday life is quite simple. The current in the system is always stable, and voltage oscillations are not observed. All this allows very comfortable welding. Additionally, there are no electromagnetic interference in the network.

DC welding allows working even with stainless steel. The process is controlled smoothly. At the same time, the metal is not spattered during welding. In many respects this was achieved due to low pulsation. Most models of welding inverters are equipped with a reliable protection system. In this case, it helps to avoid short circuits. Additionally, the electrode will not stick during operation. It depends exclusively on the stabilization of the arc. The efficiency of welding inverters is 80%. Power consumption in many models is negligible. You can use the usual household network.

How to make a welding inverter?

The inverter welding machine can be made by hand . To do this, you need to get a noise filter and a network rectifier. A conventional cooler is used to cool the system. In addition, a current sensor and a step-down transformer are required . The mains rectifier in the welding inverter is responsible for alternating current. Its transformation occurs in a diode way.

In addition, condensers are involved in this process. In this case, alternating current with a large frequency becomes constant. The interference filter in the device monitors the power. In order for the inverter welding machine to be made correctly with its own hands, the output rectifiers must eventually stabilize the alternating current. In this case, they must open and close quickly.

Selection of quality equipment

To choose a good inverter welding machine, first of all you should look at the power of the device. On average, this figure is in the region of 8 kW. The parameter of the welding current must be at least 200 A. In turn, the voltage in 220 V is welcomed. Diameters of welding electrodes are allowed different. In this regard, manufacturers produce different models. The minimum diameter of the electrode should not be more than 1.6 mm. In this case, you can expect to conduct any delicate welding work that requires accuracy. In all other cases, you can safely use electrodes with a diameter of up to 4 mm.

The compactness of the welding inverters also plays an important role. In general, many models look small, but their weight is very different. On average, the dimensions of the welding inverter are as follows: length is 320 mm, width - 210 mm and height - 200 mm. The weight of the model should not exceed 7 kg. The value of the welding current usually ranges from 10 to 200 A. Lastly, it is necessary to evaluate the control of the device. The power regulator should be in a convenient location. In this case, the controller must move smoothly. Hot start function is welcome. All this will allow you to get down to work very quickly. The cost of the devices depends on the manufacturer. The average price for a good inverter welding machine is 9,000 rubles.

Welding inverters "Kaiser"

Welding inverters "Kaiser" differ in their ease of use. At the same time, you can always choose an inexpensive model. In most cases, their characteristics are acceptable. Welding inverters "Kaiser" are rarely used by professionals. However, in domestic conditions, they are in great demand.

The hot start function is not there, but they are compact and weigh a little. All this makes it possible to transport them with great comfort. In addition, they are safe, and you can work without risk to health. To this end, manufacturers have provided a short-circuit protection system. In addition, it should be noted a comfortable control unit of the device. You can adjust the power quite smoothly. In this case, only the most necessary indicators are on the front panel. Repair of welding equipment "Kaiser" can be done in the service centers.

Model "Kaiser NBC-200"

This model is an example of a compact welding inverter. Its length is 330 mm, height 210 mm, and width only 200 mm. At the same time, the unit weighs 6.5 kg. The voltage of the device is 220 V. All this allows you to connect it to the household network without any problems. Power consumption is small. The maximum power is 8.2 kW. At the same time, the welding current is at 150A. It can only be set at a minimum of 10 A. The overheat protection is provided by the manufacturer.

Welding electrodes can be used in a variety of diameters. The smallest size that can be installed is 1.6 mm. The maximum electrode diameter for this model is 4 mm. Among the shortcomings can be noted a weak case. At the same time, the slightest mechanical damage can lead to serious equipment failure. Welding inverters are very afraid of dust. Work with them on a dirty building site for a long time is undesirable. Are worth the data inverter welding machines (market prices) 9000 rub.

What is the difference between "Kaiser NBC-300"?

These inverter welding machines (the device diagram shown below) from the previous model are more powerful. This parameter is as much as 8.8 kW. The maximum welding current can be set to 250 A. The minimum values are 20 A. The voltage of the device is 220 V. The minimum diameter of the electrode used is 1.6 mm, the maximum diameter is 5 mm.

Protection from overheating is provided, and it pleases. Weighs this model 4.5 kg. The standard set of welding inverter includes a mask for protection, hammer and copper cables. They are intended for grounding, as well as for holding electrodes. The length of the copper ground cable is 1.5 m. For the holder, it is 0.5 m longer. The given welding inverter will cost the buyer approximately in 9200 rbl.

Welding inverters of the company "Interskol"

Welding inverters of this company are often used by qualified specialists. Almost all models have a forced arc mode. The combustion process is more stable. In addition, it is possible to use the hot start function. All this greatly facilitates the work at the beginning of welding.

Automatic reduction of the welding current is also available. Thanks to this, the electrode will never stick to the surface. As a result, the risk of a short circuit is minimized. In addition, due to this, it is possible to protect a person's eyes from a burn. The surge protection system is installed. When the current drops in the network, the stabilization unit is turned on in the device. In addition, the thermal protection system is always activated. It answers the temperature of absolutely all elements. All this allows you to work continuously for a very long time.

Characteristics of "Interskol VDI 160"

The inverter welding machine "VDI 160" manufactured by Interskol has a nominal voltage of 220 V. The limit current is 160 A. The maximum parameters are up to 215 A. The voltage ranges from 170 to 260 V. The hot start function works in an autonomous Mode. In this case, the afterburning of the arc can be activated manually. The function of antipicking of the electrode is provided.

Among the disadvantages, there is the lack of a voltage reduction unit. It responds, as a rule, to the stabilization of the welding inverter at idle. The arc ignition voltage is 120V. At the same time, the idling speed is only 96 V. The nominal power consumption is 4.4 kW. Maximum can be set on the panel 5.9 kW. The efficiency is 92%. A fan is provided for cooling all elements. This model has the following dimensions: length - 302 mm, height - 110 mm and width - 250 mm. The weight of the equipment is 6 kg. The data of inverter welding machines (market prices) are about 8200 rubles.

Review of "Interskol VDI 120"

The nominal current consumption of this model is 15 A. The voltage is provided by this welding machine (inverter) 220 V. The average current figure is 120 A. The maximum can be 160 A. At a load of 45%, the load is maintained at 120 A. The voltage ranges are from 170 to 260 V. The welding current can be easily adjusted. Its minimum values are 5 A. The maximum can be set to 120 A. The hot start function is provided by the manufacturer. There is also an afterburner to work to stabilize the voltage in the system. In this model, there is an anti-invasion function.

The voltage reduction unit, as in the previous device, is absent. The arc ignition current is 120 V. At the same time, the idling voltage is at the level of 96 V. The power consumption of these inverter welding machines (the device diagram is shown below) is 3.2 kW. The maximum indicator is 4.4 kVa. The efficiency is 92%. A fan for cooling the system is available. The dimensions of this model are very compact. The length of the device is 280 mm, height - 110 mm, width - 250 mm with a mass of 5.4 kg. The welding inverter will cost about 9300 rubles.

Welding devices of the trade mark "Rainbow"

Welding inverters "Rainbow" are classified as semi-professional. They can work from a portable generator. These devices are used to perform a variety of welding jobs. Electrodes for them fit different diameters, which is very welcome. The power of these devices depends on the model. Current regulation occurs in a wide range. The dimensions of most models are rather modest. At the same time they weigh a little, and this makes them convenient for transportation over long distances. For this, the manufacturer provides a strong handle. In addition, there is a belt for transporting the device. There are welding inverters on different surfaces. In this case, the spattering of the metal will be minimal. As a result, the seams are very neat. Among the shortcomings can be identified the high cost of these units.

Model "Rainbow MMA 277"

The inverter welding machine "Rainbow MMA 277" has a rated voltage of 190 V. The electric current in the system is constant. At the same time, various fluctuations are minimized. The power consumption is 3.6 kW. The maximum welding current is 277 A. At the same time, the minimum indicator is in the region of 20 A. The coefficient of efficiency is 60%. This welding inverter works in one phase. There is no fuse in this model. Insulation class is available in the "H" series. In this case, the protection system is installed "IP21". The weight of this unit is 4.7 kg. In general, these inverter welding machines (the device diagram shown below) can be characterized as convenient and productive. They cost in the market an average of 8,000 rubles.

What is the difference between "Rainbow MMA 255"?

MMA series welding machine (inverter) "Rainbow 255" differs high voltage network. At the same time, the power consumption is 3 kW. The maximum welding current is 255 A. The efficiency is 60%. The phase in this device is provided for one. The weight of this unit is only 3 kg. The hot start function is not available. In general, it is quite versatile and suitable for different jobs. The inverter will cost about 9500 rubles.

Inverters of the company "Fubag"

The company "Fubag" production of welding inverters engaged in a very long time. In this case, they have in the assortment of professional models. They are characterized by high performance and good performance. In this case, the control units are installed very high-quality. Many experts work comfortably on indicators. Most often they are used on various construction sites. In service, welding inverters are quite simple. Periodically, it is necessary to clean the dust, but it is very simple. The cooling unit in the devices is installed reliably.

The protection system is working properly. Breakages in these welding inverters are usually extremely rare. In addition, the compactness of the models should be noted. All this makes them very simple to transport. In the standard configuration of the device there is everything necessary for work. Electrodes can be installed in a variety of diameters. The current stabilization will be quite good. Repair of welding equipment "Fubag" can be done in the service centers.

Specifications Fubag MMA 300

This inverter welding machine Fubag is classified as professional. At the same time, it can be used successfully in domestic conditions. The mains voltage is 220 V. The frequency of the current is 50 Hz on the average. The nominal power consumption of the equipment is 5.7 kW. At the same time, the efficiency is 85%. The minimum welding current is 20 A. The maximum can be set on a panel of 300 A. The insulation class is a series of "H".

Dimensions given by inverter welding machines (the device diagram is shown below) have the following: length - 500 mm, width - 210 mm, height - 335 mm. The minimum electrode diameter is 1.6 mm. The idling voltage is at 65 V. The electronic display in this model is installed. The protection class is provided by "ИП21". The total weight of the unit is exactly 7 kg. In the standard set of the welding inverter there is a hammer, goggles, as well as cables for electrodes and grounding. The transport case, unfortunately, is not in the kit. This model is worth about 12,500 rubles on the market.

Summarizing

Welding inverters are quite different. Some of them are designed exclusively for use in domestic conditions, other models are made especially for skilled workers. For household use it is better to dwell on the trademark "Rainbow". Model MMA 277, in principle, has decent characteristics and at the same time is cheap. For specialists it is possible to advise welding inverters "Kaiser". The NBC-300 is able to cope with so many tasks. In general, it is universal and convenient to use.