How much power does a generator need for inverter welding?

We select a high-quality gas generator for welding

Gasoline generators (gasoline power plants) are miniature autonomous installations for energy production, which are used as a backup or main source of supply. Gasoline generators are divided into several types according to power and direction of use. Below in the article we will figure out how to choose a generator for welding without resorting to specialists.

Types and features of generators

Generators running on gasoline are mainly used as a backup source to supply electricity to any objects or, if necessary, to carry out field work with power tools that cannot be connected.

Gasoline generators for welding are designed for temporary operation (for several minutes or hours). If you need to work for a long time without breaks, it is better to get a diesel generator.

Gasoline generators for summer cottages and recreation - this type of generators is the most popular among buyers. The stations can produce power from 0.7 to 5 kilowatts, and are quite easy to transport.

Gasoline generators for welding machines - a variety with a power of 5 to 10 kilowatts. They are well suited for intensive work for 8 hours. It is very important to know the engine manufacturer so as not to end up with an option that will make its shortcomings known within a month. An important parameter is the size of the fuel tank and the presence of a sound insulation casing and the ability to start the generator with an electric starter.

Scheme and structure of the device

Modern overhead valve generators can be compared with diesel ones in terms of the quality of the energy released. The units can provide very high performance while minimizing noise, and are compact and durable. It is advisable to buy this generator for welding if you plan to carry out work on a construction site or power a welding machine that periodically requires a powerful flow of energy.

A gas generator with a welding function for a cottage or enterprise produces power from 10 to 20 kilowatts. They are equipped with automatic start and are used as a stationary installation.

Design feature and operating principle

Many experts classify welding gas generators as a separate type of generator; their operating principle is no different from the usual one, and the circuit is quite simple.

When the arc is ignited, the welding current necessary to maintain the arc flows through the armature winding. Current is generated through the transformation of energy due to the rotation of the crankshaft in the power internal combustion apparatus, which converts mechanical energy into electrical energy.

What to look for when choosing

If you need high-quality welding, then you must clearly understand how to choose the right gas generator for welding. The continuity of welding will depend on it, which will directly affect its quality. A generator is also needed when it is not possible to connect to the electrical network. Thus, it will be an indispensable link in welding.

The most basic parameter is the maximum output power of a welding gas generator, which is often confused with power consumption. For some manufacturers, this parameter may be indicated directly in the technical data sheet or operating manual.

If the maximum power consumption is not indicated anywhere, then it is easy to calculate it yourself. You need to multiply the maximum welding current by the arc voltage. We divide the result obtained by the efficiency of the inverter itself.

Watch the video, selection criteria:

Example. Let the inverter to which the welding unit is connected have a maximum welding current of 180 A. The arc voltage of the inverter is usually 25 V, although it is different for each inverter. Before making calculations, be sure to check it with the value specified in the technical data sheet. The efficiency of almost all inverters is 0.85. Now we calculate the power: 180 x 25 / 0.85 = 5294 (W). This is the maximum power consumption.

To determine which gas generator with welding function is suitable for a specific inverter, you should add another 30% to the received power. This is necessary so that the generator does not operate at the limit, but in cruising mode. In our example, a generator with a power of 6882 W or 6.9 kW is suitable.

When calculating, you need to remember that power consumption is always expressed in “kW”. If you see the designation “kVA”, then this value indicates the generated power of the generators.

To convert generated power into consumed power, you need to use a simple conversion formula:

• 1 kW = 1 kVA x KM, where
• KM is the power factor, and kVA is the power consumption of the inverter.
• The KM of inverters always lies in the range of 0.6-0.7.

If your budget does not allow you to purchase a gasoline generator with a welding machine of the required power, you can go backwards and calculate which generator will handle the welding machine without damaging the welding process. To do this, you need to know the permissible current limit of the inverter, which should not be exceeded.

Example. Let's say you purchased a generator for a 3 kW inverter welding machine. To calculate the maximum current, you need to multiply this value by the efficiency of the inverter itself (0.85) and divide by its arc voltage. So, 3000 x 0.85 / 25 = 102 (A). Thus, working up to 102 A, you can safely weld with a 2-3 mm electrode.

It is also useful to know the dependence of the peak power of a gas generator with a welding function on the diameter of the electrode:

• Peak generator power - 2.5 kW = 2 mm electrode diameter
• Peak generator power - 3.5 kW = 3 mm electrode diameter
• Peak generator power - 4.5 kW = 4 mm electrode diameter
• Peak generator power - 5.5 kW = 5 mm electrode diameter

Popular models

After considering the basic principles of selection, it is worth familiarizing yourself with the manufacturers. For evaluation, we took several different manufacturers in terms of unit power and price range.

Gasoline welding generators, based on the operating principle of the engines, are divided into:

1. Two-stroke;
2. Four-stroke.

Gasoline generators like HUTER DY6500L are especially effective in domestic conditions: at home, in the country, in the garage. They are not designed for long-term operation, but have distinctive characteristics. These mini-stations work perfectly in tandem with Svarog inverters.

Brima LT 8000B is a target device that works ideally with many Resanta inverters. When testing work together with Resanta SAI-190, it gave fairly good performance. In some cases, Brima can serve as a backup power source for a country house.

Endress ese 606 is a generator with a huge fuel tank in a high price category. Can work up to 2-3 times longer compared to conventional generators. The engine from the world famous Honda company minimizes fuel consumption. Works great with EWM inverters.

Generator care

Caring for gasoline generators for welding machines does not require significant time spent on maintenance. All you need to do is periodically check the oil level and add it if necessary. From time to time it will be necessary to recharge the generator battery.

Watch a video about the HUTER DY6500L model:

It is better to carry out operation indoors to protect from precipitation or use a special cover for installation. You can place it in a corner of the garage and not worry about precipitation getting on the unit.

You should not start the gas generator too many times in severe frosts (from -20 and below), such neglect of temperature changes in the device is fraught with rapid wear of the engine.

Results

It is worth saying that the above information is presented for conventional welding machines that are used in domestic conditions. When selecting a professional welding generator like the DDE DRV 160, it is worth referring to the advice in the instruction manual, since quite often some problems are observed when welding with a certain type of generator and manufacturers indicate this in the documentation.

The main reason for the incompatibility of generators and welding machines is considered to be the difference in characteristics in terms of power, however, this is far from the only parameter, although it is the main one. You can, of course, select a generator yourself using the above calculations, but it is advisable to contact specialists before purchasing.

Source: http://GeneratorVolt.ru/benzinovyjj/podbiraem-kachestvennyjj-benzogenerator-dlya-svarki.html

Which generator is suitable for operating a welding inverter - calculation of characteristics

Often, when working with an inverter welding machine, difficulties arise in connecting to the electrical network. This problem can be solved by using an autonomous electric generator. But how to choose the right generator for a specific inverter, and what characteristics should be taken into account?

Generator parameters

A common mistake when choosing an electric generator is the incorrect selection of rated power. Analyzing reviews, you can often come across the problem of a station shutting down due to excess load. In addition, unstable operation affects the quality of welding and the maintenance-free life of the inverter.

To minimize these problems, it is recommended that you familiarize yourself with the basic parameters of an autonomous power supply station before purchasing.

These include the following characteristics:

• Rated power, kW or kVA.
• Short-term reserve power.
• Number of phases.
• Voltage, V.

These characteristics must correspond to those of an inverter welding machine. However, in addition to them, the specifics of each model should be taken into account. First of all, the stability of the generated power. It is this characteristic that will directly affect the quality of operation of the inverter. To determine the optimal value, it is necessary to perform a series of calculations.

Characteristics calculation

There are two options for selecting equipment - an inverter for a generator or vice versa. The most common is the second, although the first is not excluded. So, before purchasing the optimal model, calculations of its power are performed in accordance with the inverter’s passport data.

The most important of these is the welding current. For small volumes of work, it is enough to purchase a device with a maximum value of 160 A. This figure will be needed to calculate the power of the future generator.

To calculate this parameter, you will need the following quantities:

• Arc voltage. Most often it is 25 V.
• Efficiency of the device. Does not exceed 0.85.

To calculate power you need to use the formula:

However, the device will operate in this mode extremely rarely. Most often, the range of welding current varies from 80 to 110 A. In order to avoid making calculations for each of the possible modes, you can apply the “On duration” factor. Usually it is 40%. Those. The rated power of the inverter will be:

It is best to choose a generator whose short-term reserve power exceeds the rated capacity of the welding machine by 25-35%. For the example under consideration, this parameter will be:

Rounding up we get a value of 3 kW. But manufacturers do not always indicate kW power. In budget models you can find the definition of kVA. Despite their apparent identity, these quantities are not equal to each other. To correctly calculate the optimal generator power, a reduction factor should be applied. Usually it is 0.6-0.7. For a 3 kVA generator the actual value will be:

This will clearly not be enough for the inverter to operate. Therefore, you need to choose a station with other, higher parameters.

Adviсe

What else needs to be considered when operating the inverter from an electric generator? First of all, the presence of a payload. Welding does not happen all the time, i.e. during periods of no arc, the load on the generator will be minimal. This will automatically turn off the station. Therefore, it is advisable to connect an additional device with a nominal consumption of 0.8-1 kW for stable operation.

If you plan to purchase the entire set of equipment, you can consider the option of purchasing an autonomous station with a welding function. This will make it possible to perform work without connecting several devices to a common network. However, such models have one significant drawback - high cost. On average it is 70-80 thousand rubles. Therefore, most often they opt for purchasing 2 devices.

Source: https://ismith.ru/welding-equip/generator-dlya-svarochnogo-invertora/

How to choose the right generator for a welding inverter | Tiberis

“Which generator is suitable for welding” is a question that often arises among people who have decided to seriously engage in welding on their own and at the same time do not have the opportunity to connect the welding machine to the network. It’s easy to get confused, especially after we see a huge list of available models on the online store page.

It would seem that it is very difficult to understand this diversity, especially if you have a liberal arts education behind you. In fact, any of us can choose the right generator for a welding inverter; to do this, you just need to know a few small but very important nuances. They will be discussed in this article.

What points must be taken into account when choosing a generator?

As befits a serious unit, each generator for inverter welding has a huge number of different technical characteristics, among which it is very easy for a beginner to get confused. But for the right choice, only five of them are most important:

It is these parameters that you should pay special attention to in order to use the generator for a long time and safely.

Generators differ by type into synchronous, inverter and asynchronous, as well as a symbiosis of asynchronous and synchronous Duplex series (manufactured by Endress); synchronous or Duplex series generators are suitable for welding . Inverter engines, as a rule, have insufficient power and are not designed for high starting loads. You can find out more about the types of generators in a separate article here.

Generator power for welding - what is the reserve for?

In most cases, the power of the welding inverter and generator is indicated by the manufacturer in the technical data sheet. Therefore, even a child can easily find these values ​​and compare them. The main thing is not to confuse the power units kVA and kW, as well as the declared rated and maximum power of the generator.

It should be remembered that when buying a generator, you need to choose a model that has 25-50% more power than the inverter you have. This is explained quite simply - constant operation of the generator at the limit of its capabilities will very quickly disable it and will not make it possible to use the full potential of the welding machine.

If for some reason you do not have information about the power of your welding inverter, you can calculate it yourself using a simple formula:

Maximum current * arc voltage / efficiency of the welding inverter - maximum power.

In this case, you only need to know the value of the maximum current, since the other two components are almost always constant (the arc voltage is 25V, and the inverter efficiency is 0.85).

For example, if your welding machine has a maximum current of 180 Amps, then approximately its power is:

180A*25V/0.85=5294 W, which means that in this case, the optimal value for the generator will be a power of 5294 W + 25% reserve = 6617.5 W, or if converted to kW - 6.6 kW. In this case, the Huter DY8000LX gasoline generator model will be one of the best options.

Welding current - it must be taken into account

Another good news is that you can very well use a generator for inverter welding, which has less power than your inverter. However, in this case, you will have to use it with some restrictions, namely, reduce the current strength to an acceptable value.

Take, for example, the case if you decide to purchase a 4 kW generator model.

We use the same formula as when determining power, but in reverse order:

Power*Efficiency/Arc Voltage = Current or 4000*0.85/25 = 136 A

Thus, on a 4 kW generator you will be able to weld on your welding inverter without any noticeable loss of quality with a current of up to 130A.

Electrode diameter - a label that is easy to remember

Another important nuance that should be taken into account is the correspondence of the electrode diameter to the minimum power of the generator. These data are approximate and fit into a simple table:

Electrode diameter (mm) Minimum generator power (kW)

2	2,5
3	3,5
4	4,5

That is, if you plan to carry out welding work with a 4 mm electrode, then the minimum power of the generator for welding should be at least 4.5 kW and higher.

Which generators are suitable for working with a specific welding machine?

You have read the main rules for choosing a generator for welding in the previous sections. Using them, you can safely start purchasing a power plant. But to make it easier for you to navigate the assortment, let’s take a closer look at the most popular inverters for household tasks and determine which generators are most suitable for them.

For inverters Svarog

Unpretentious and inexpensive Svarog inverters stand out among other brands with a long five-year warranty. Buyers also often prefer them due to their low price, so purchasing budget options for Huter and Fubag generators seems like a completely reasonable decision.

The welding inverter Svarog REAL ARC 200 (Z238N) will work perfectly in tandem with the Huter DY6500L generator. This high-quality and useful unit can successfully operate on natural gas, which significantly increases the efficiency of the generator.

For Resanta inverters

The popular inverter manufacturer Resanta also produces products intended for the mass consumer. A distinctive feature of this brand is the compact size and light weight of welding machines.

For the household welding inverter Resanta SAI-190, you can use the BRIMA LT 8000 B gasoline generator, which, in addition to this purpose, will, if necessary, serve you as a backup power source at the dacha or in a country house.

For Kemppi inverters

Finnish Kemppi inverters have proven themselves worthy when working in harsh natural conditions and in production. They are rightfully the leader in sales among imported premium models. They are bought by people who know how to value real quality and reliability.

In addition to the popular model of the Kemppi Minarc 150 welding inverter, you can safely purchase the Fubag BS 5500 generator, which is characterized by very low fuel consumption, a durable frame and reliable overload protection.

For EWM inverters

Products of the famous German brand EWM appeared on our market back in Soviet times. From then until now, EWM inverters have brought real pleasure to the people who work with them. Such a device needs an excellent generator.

Therefore, for the EWM Pico 160 welding inverter, the Fubag BS 7500 A ES generator seems to be a worthy partner, which is equipped with a powerful engine, an AVR unit and is equipped with a spacious fuel tank for long-term operation without refueling.

Useful tips for choosing a generator

There are several other useful tips based on the recommendations of welding professionals that will be useful to you when purchasing a generator for an inverter welding machine.

1. generators with a power of up to 10 kW on a gasoline basis . They are most widely represented in this segment. And more powerful power plants run on diesel fuel.
2. The power reserve of a gasoline generator, at least 15-25%, greatly facilitates ignition of the arc. For power plants running on diesel fuel, it is desirable to have a larger reserve - up to 50%.
3. The most functional are power plants equipped with cast iron sleeves. Their minimum service life is 1500 hours . Aluminum blocks can withstand significantly less load - up to 500 operating hours.
4. Inverters with the abbreviation PFC in the name have a built-in power factor corrector in their circuit design, so they can operate at reduced voltage and are excellent for operation from a generator, for example the Svarog ARC 160 PFC model.

The information provided in the article is intended for conventional welding inverters, which are often used in domestic conditions.

For professional equipment (semiautomatic welding machines and inverters designed for argon-arc welding), certain problems may arise when operating from a generator. Many manufacturers explicitly state this in the user manual. Therefore, it is highly advisable to consult with specialists before purchasing in order to avoid serious consequences.

It is quite possible to select a generator for a welding inverter yourself, using common sense and our advice. And for complete confidence, contact the consultants and managers of our welding hypermarket, who will tell you which generator is suitable for welding in each specific case. Our specialists have the right answers to the most tricky and difficult customer questions!

Source: https://www.tiberis.ru/stati/vybor-generatora-dlya-svarochnogo-invertora

Which generator will power an inverter welding machine?

Inverter-type welding machines are widely used in many areas of economic activity of modern people.

With their help, it is possible to solve most issues related to the construction and maintenance of metal structures used not only in production, but also in everyday life.

New welding technologies are especially in demand on construction sites, where until recently the main problem for a welder was bulky and inconvenient to use electrical devices (see photo below).

Transportable welding units

Due to their large weight and dimensions, these devices had to be transported on special carts or vehicles, which created certain problems with moving them from place to place within the work area.

Generator for mobile inverter

Thanks to the use of modern inverter technologies, the design of the welding unit was significantly simplified, and its dimensions were reduced several times. At the same time, the mobility of such a device has also increased noticeably, which is explained not only by the compactness of the device itself, but also by the possibility of its operation from an independent generator source.

Important! In conditions where inverters for a generator are a common load, it was possible to implement a mode in which electronic equipment operates without being tied to the power grid.

A typical generator for an inverter-type welding machine is traditionally made in the form of a gasoline engine with a drive that provides electrical energy. Anyone who even occasionally visits a forum on relevant topics should know how pressing the issue of switching to a mobile inverter is.

At the same time, many of the interested users who visit this forum very often ask a natural question about which generators will power an inverter welding machine. The answer for all those interested in this problem is the calculations given in special sources, a summary of which can be found in the following sections.

Note! The ability to use a gas generator for a welding machine is also attractive for those who often have to work in the field, away from power lines.

Note that in urban conditions, stationary welding equipment operates from mains voltage sources, the stability of which can be assured (see figure below).

Inverter in the workshop and in production

In field conditions, when a gasoline generator is needed for a welding inverter, there is not and cannot be complete confidence in the stability of the power supply. To avoid this inconsistency, it will be necessary to calculate in advance the generating system for its ability to provide the specified operating characteristics (what current is needed at its output, for example).

Deciding on how to choose a generator for welding machines depends on a number of criteria, the main ones being:

• Welding inverter power (or current consumed by it);
• Conditions of its operation (normal or critical);
• Characteristics of the gasoline generator itself.

The main requirement in this case for the generating set is its operating power. In the next section, we will look at how this parameter is calculated and which generator is best to choose based on its results.

Maximum value

Before you begin calculating the parameters associated with the electric generator, you should carefully study the operating characteristics of the welding inverter itself, given in its passport (photo of the appearance of the unit below in the text).

Inverter welding unit Inverter generator or conventional: which is better

If it states that this device produces an output of 160 Amperes, then based on this parameter the maximum power consumption can be determined. Its indicator (P max) is calculated as the product of the arc voltage (it is usually equal to 20-25 Volts) and the output current.

Additional Information. These calculations also take into account the efficiency of the welding unit, the value of which is, as a rule, 0.85-0.9.

For our case, we choose the maximum efficiency = 0.9 and as a result we get:

P max = 160 x 20 x 0.9 = 2880 watts.

Rounding the result obtained, we can say that the power consumed by the inverter will be approximately 3 kW. Based on the results of this calculation, the generator for an inverter welding machine P max should not be lower than the specified one (it is better if it is a little higher, that is, with a small margin).

Effective and reactive power

When assessing this indicator, it should be borne in mind that during the welding process the operator never works in the maximum current mode, but always leaves a small margin for the work he performs. This circumstance is also taken into account before choosing a generator for inverter welding that is suitable for current and output power.

It is believed that the so-called temporary correction of its use, denoted as VP, should be taken as a real indicator of the energy spent on welding. Usually it is given in the passport for this device and is about 40%. Taking this correction into account, the power selected in the example above should be only 1.2 kilowatts.

In addition, the difference between the active component of power (consumed in the form of heat) and its reactive component should be taken into account.

Necessary clarification. This component is understood as that part of the total energy that is associated with the processes occurring in the reactive elements of the load (in capacitances and inductances, in particular).

Since the gasoline generator is loaded onto a standard welding inverter, the design of which contains a sufficient number of reactive elements, taking this component into account will affect the final result of the assessment. The correction made to the calculation formulas is introduced in the form of the so-called “power factor” (it is denoted in the formulas as the cosine of the phase shift angle between the reactive and active components).

Power factor (PF), depending on the device used, can range from 0.75 to unity. For those who want to know how much power is required for the purchased device, let us remind you that for industrial inverter units this figure is indicated in the passport and is approximately 0.8.

Industrial products

Industrial designs of generators used to supply power to mobile welded equipment can have a wide variety of designs. From the point of view of economy and efficiency, the option of a gasoline unit of the same inverter type is considered optimal. In this case, preference is usually given to devices from the same manufacturers, designed specifically for working with inverter welding equipment (figure below in the text).

Inverter type generator

It is believed that it is this combination of these two components of the working complex that makes it possible to obtain a sufficiently stable arc and provide the required parameters of high-frequency voltage and pulse current. According to their class and intended purpose, all existing welding devices are divided into the following types:

• Purely industrial designs;
• Professional models;
• Inexpensive household products.

Industrial and professional models are mainly used for the manufacture of volumetric metal structures and are designed for round-the-clock operation for long periods of time. For their normal functioning, significant operating currents will be required, capable of ensuring high-quality assembly of industrial structures. This type of welding device will require gasoline generators capable of delivering currents of up to 250-500 Amperes (see photo below).

Summarizing the consideration of possible options for choosing a generating device for an inverter, it is necessary to note the following. When thinking about the question of which generator is best to choose for welding, most users give preference to small-sized gasoline units in inverter design.

Source: https://amperof.ru/elektropribory/generator-potyanet-invertornyj-svarochnyj-apparat.html

How to choose a generator for repair and welding work?

A generator for welding differs from a conventional household analogue primarily in that it operates with a variable load :

1. You start the backup source and turn on the device, but there is no load yet;
2. As soon as the electrode touches the metal, an electric arc occurs and the load jumps to maximum;
3. As soon as you remove the electrode and the arc disappears, the load drops again and the engine runs idle.

Considering that welding machines have high starting currents, not every generator is designed for them. Often, due to high starting currents, the alternator winding burns out.

In addition, a standard asynchronous gas generator has wave voltage surges. Because of this, efficiency decreases and the service life of the connected equipment is reduced. Stable voltage is important for welding .

Alternatively, you can use inverter generators, but they are too expensive compared to conventional ones. They are intended for high-precision equipment and measuring instruments that require stable voltage. It is irrational to use inverter gas generators for a welding machine.

with a synchronous motor or Duplex - a combination of a synchronous and asynchronous motor - is best suited Duplex technology was invented and patented by Endress, and a whole series of electric generators is now produced under this brand.

For welding machines, both gasoline and diesel power plants are used. Gasoline ones are cheaper, and their range is greater among low-power models up to 10 kW. Nevertheless, with frequent use, diesel engines will be more profitable , since diesel fuel is cheaper than gasoline.

The advantage of gasoline generators is that they can operate at lower temperatures than their diesel counterparts. Summer diesel fuel waxes and freezes at -5°C , which makes it impossible to use diesel generators in winter.

In addition to technical requirements, it is important to calculate the optimal characteristics.

How to choose a generator for welding?

The first thing you need to pay attention to is the rating of the power plant. It is selected according to the maximum power of the consumer. It is best to take it with a margin of 25-30% , because frequent use at maximum load will increase wear on parts.

How to calculate generator power?

The power can be calculated using the formula: Pnom = I × Uarc / η , where I is the maximum current of the device, Uarc is the electric arc voltage, η is the welding efficiency. The values ​​of U and η are almost always stable, the arc voltage is 25V, and the efficiency is on average 85%.

For example, if the maximum current of your device is 150A, then its maximum power consumption will be:

150A × 25V/0.85 = 4412W.

Rounding, we get 4.4 kW. Now let's add another 25% of the reserve:

4.4 kW +1.1 kW = 5.5 kW.

This is exactly the rating you will need for 150A.

Is it possible to use a lower power generator for inverter welding?

The inverter allows you to regulate the current. And it can be powered from an electric generator of less power than the rated one, but before that you need to know the maximum current level.

And so, let’s imagine that you have a 225A inverter, but an electric generator of only 4 kW. Now let's calculate using the inverse formula: I = P × η / U;

The maximum current strength of the inverter at which you can connect it to a 4-kilowatt generator is:

4000W × 0.85 / 25V = 136V.

Thus, you can set the 136V threshold on the inverter and freely use a 4-kilowatt power source. But, if you set the current strength higher, the alternator will burn out and will have to be repaired.

Selecting power by electrode diameter

Larger diameter electrodes require higher current. That is why there is a relationship between the network load and the diameter of the electrodes. So, let's look at the table:

Minimum generator power

For example, if your inverter welding is powered by 4.5 kW, then the largest electrodes with which you can weld metal are 4 mm. If, for example, you insert a 5 mm electrode, then the power of 4.5 kW will not be enough to melt the metal efficiently, and the seam will be of poor quality or not welded at all. Therefore, autonomous power supply must be selected primarily based on the maximum power of the inverter.

Not all welding machines can be powered by an electric generator and vice versa. Therefore, before purchasing, check with the seller whether the selected welding model can be powered by a power plant. The manufacturer always indicates this in the instructions.

Which manufacturers are suitable for welding machines?

Based on the specifics of the application, not all manufacturers produce power stations for welding machines. Most suitable brands:

• AGT - mainly “three-phase” with a rated power of 5 kW. Cheap, gas generators use original Honda engines. According to technical characteristics and fuel quality requirements, adapted for the Eastern European region. Made in Romania;
• Endress produces single-phase and three-phase gas generators with a nominal power of 3 kW. Inside there are high-quality engines from Honda, Briggs & Stratton, Yanmar, Kohler. They are mass produced in Germany and have no chronic problems. Good brand reputation;
• RID produces both single-phase and three-phase power plants with a capacity of 5 kW and above. Produced using technologies from the German brand Geko. Produced in small quantities. The cost is higher than that of competitors, but the quality leaves no questions. Reliable engines.

If you do not yet have a welding machine, you can alternatively purchase a special welding generator instead.

What is better, select welding and generator separately or buy a welding generator?

A welding generator is a structure consisting of a gas generator and a welding machine paired with it. The power plant is designed in such a way as to serve welding, so it has a longer service life. Other advantages :

• Short circuit protection installed;
• It is possible to work in areas remote from the central power supply (city outskirts, field, road);
• The design is more compact than if you connect welding separately;
• The cost is lower than a diesel generator of similar power.

Flaws:

• Such an electric generator can only be used for welding;
• Gasoline has better fuel consumption and is more expensive than diesel;
• Cannot be powered from the central network;
• Low motor life.

The most significant limitation is that it cannot be used as a backup power source for other consumers. It is intended for welding only .

If you select separate power for welding, it is better not to use it for other purposes, and vice versa, if you have a power station at home for backup power, try not to connect welding to it. This can result in breakdowns and costly repairs.

A welding generator is the best option if you are professionally engaged in repair work, constantly traveling to open areas without access to electricity. You don't have to connect or configure anything - just start the engine and adjust the current to the diameter of the electrode. Fewer wires and easier to manage.

But, on the other hand, this way you will not be able to connect the structure to the central network. The average gasoline consumption is 0.5-0.6 l/kWh, and this will cost 10 times more than when connecting the device to the central network. In addition, with such a consumption, electric generators have limited autonomy. On average it is only 3-5 hours.

If you carry out most of your welding work with access to the central power grid, it is cheaper and more profitable to buy a generator separately

Source: https://svarkagid.com/kak-vybrat-generator-dlya-remontnyx-i-svarochnyx-rabot/

How to choose the right generators for welding inverters: power and current

A large share of welding work takes place in places remote from electrical networks. Even when building a house in a village, permission to connect to a power line is issued after the construction of the building, when there is somewhere to connect the cable. The generator for the inverter is used for welding work. In the remaining time, it can serve as a source of current in the country and for working with power tools.

Structure

Generators convert the energy of mechanical movement into electrical energy. The simplest example is a car generator, which uses the torque of the wheels to charge the battery.

The gas generator for the welding inverter is driven by an internal combustion engine, which rotates the shaft and the current collector and frame . When the rotor rotates, an electromagnetic current with alternating polarity is alternately excited on the magnet coils and supplied to the output cable.

Operating principle of the inverter

The welding inverter converts 220 V current with a frequency of 50 Hz into high-frequency alternating current with low voltage.

1. The current from the network is supplied to a rectifier - a diode bridge.
2. The filter smooths out peak values, leveling the current to a straight-line value.
3. The transistor unit turns it into an alternating, but high-frequency one.
4. The voltage in the transformer is reduced. The current increases.

Additional current regulator and stabilization units ensure a uniform high-frequency output flow. As a result, in case of any voltage drops in the network, the inverter produces a stable current . This makes it easier to choose which generators are needed for the welding inverter.

To excite current in the windings, pull the starting cord. The hand makes a sharp movement towards itself. If you have a battery, just press the button.

Selecting a Power Source

Inverters are capable of operating not only from a 220 V network, but at a strong voltage drop to 0.165 kV. The minimum current drop data is indicated in the technical data sheet . This feature of the equipment allows you to cook not only from a stationary power source. You can connect a generator for welding with an inverter. The choice is made according to the following parameters:

• inverter power;
• electrode diameter;
• current strength;
• compatibility of the generator with the welding machine.

According to the principle of generated current, generators are divided into: synchronous, asynchronous and Duplex type. You should choose only synchronous models , they are suitable for electric arc welding as a power source.

Power calculation

The power of a generator for an inverter-type welding machine is determined according to technical characteristics, or is calculated using the formula:

PG = (AC · 25V ÷ 0.85) · 1.25;

where: PG – power;

AC – rated current;

0.85 – efficiency;

1.25 – the minimum power reserve is 25%;

25V – arc voltage.

For example, with a current of 180 A, indicated within the regulation limits as a large value, a generator with a capacity of 6.7 kW should be connected.

Sockets

When connecting the welding machine to the generator, a cable is used, at one end of which there is a grounded socket, at the other end there is a special plug, which is inserted into the output socket of the power source. Such a cable is usually found among the components of the generator and inverter.

Fuel type

A generator is a power plant with an internal combustion engine . Diesel fuel or gasoline generator for welding, which one is better to choose and how they differ. From the point of view of weld quality and the ability to weld alloy steels and aluminum, a gasoline engine is better.

The diesel generator is designed for long-term or continuous operation. It can be used in the country as a power source for home electricity, and at the same time for welding and operating various power tools. It must be selected according to the maximum simultaneous load.

The disadvantage of diesel engines is their large size and weight. You can’t take such a generator from the garage to the dacha or to the construction site to weld the structure.

The gasoline engine is not suitable for long-term use with heavy loads. At the same time, it ensures stable operation of the inverter. It can be used in the welder operating mode of 40%. How to choose a gas generator for inverter welding, taking into account long-term use. To connect to your home and dacha, you should choose a power plant with a power reserve of 25% of the peak network load .

It is rational to install a gas generator for welding with an inverter under the condition of short-term operation or with a power reserve of 50 - 75%. You should follow the recommended operating mode for the inverter and the generator, alternating load with rest.

Frame

For better cooling, generator components can be mounted on a rigid frame and partially covered with a housing . This unit heats up less and requires special conditions. It can be used in indoor conditions with clean, dust-free air. Light weight allows the generator to be moved freely.

Solid-body equipment has a fan installed and slots for air circulation. It is less demanding on dust and moisture, but requires daily maintenance.

The housing contains a control unit, a start button, a grounding bolt and cable connectors.

Types of generators

Only synchronous generators are suitable for welding. The best way to rotate an armature is with a 2 or 4 stroke engine .

The 2 stroke diesel engine can run continuously. The voltage is not stable, which negatively affects the quality of the seam.

The four-stroke gasoline engine has smoother current output characteristics, provides a stable arc and smooth adjustment of modes.

Gasoline generators with welding function

Welding gas generators provide a full guarantee of identical characteristics . In one housing are connected: an inverter-type welder and a generator with a gasoline engine.

Amateur models produce current up to 170 A, professional 220 A and higher.

Models

Popular types of welding gas generators are suitable as a power source in the country. It can power the tool during periods when welding is not working.

The most popular models in stores are from Germany:

• RID RH5221 S – gasoline power station has a built-in welding machine;
• RID RH7220 S – constant welding current up to 220 Amps.

RF equipment from Svarog is popular among professionals and amateurs..

Operating rules

The generator must always be clean. Dust and dirt settling on electrical terminals and windings lead to overheating and malfunction.

To excite the current in the winding of gasoline generators, a battery is installed. It should be charged periodically. In addition, there is an oil level indicator on the panel. A red light means that the coolant and lubricant level is low and needs to be topped up.

Like all electrical equipment, the generator should be periodically checked for insulation integrity, the terminals should be cleaned of oxides and the contacts should be tightened.

Source: https://svarka.guru/oborudovanie/vidy-apparatov/generatory-dlya-invertorov.html

What kind of generator is needed for a welding inverter?

Welding work is carried out quite often and is in demand in many areas, both professional and domestic. Often the joining process takes place in special places, workshops and other premises equipped for this purpose. But if you need to do everything where there is no stationary power source, then this issue can also be solved. To do this, it is enough to decide which generator is needed for the welding inverter in order to work through it in any place convenient for you.

Generator model for welding inverter

There is a wide variety of models of modern generators. This greatly simplifies the choice when purchasing, since you can always choose the option that is ideal for your type of work.

When thinking about which generator is suitable for welding, you should focus on the parameters of the equipment. This is easy to determine by the type of inverter itself, because there are also a large number of them.

Moreover, some companies that produce inverters also produce generators for them.

The main purpose is to support autonomous power supply by converting fuel energy into electrical energy. Due to this, the equipment should have excellent efficiency indicators, as well as mobility.

Generator classification

Many people, when choosing which generator will power an inverter welding machine, pay attention only to its power, but there are other important characteristics. Among them:

• Engine's type;
• Type of welding current;
• The magnitude of the current on the generator;
• Availability of additional functions and characteristics.

The most popular are the two types of internal combustion engines that are used here. The first is a gasoline generator, which is very easy to maintain and is not difficult to repair. It can be used over a wide temperature range. One very important practical benefit of this product is its unpretentiousness to fuel quality.

Gasoline generator for welding

The second type of engine is diesel. It is more designed for intensive and long-term work. Gas generators can also be used, but they have not gained widespread popularity due to the complexity of operation and problems with fuel supplies.

Diesel generator for welding

Basic parameters of the generator

Most users who have chosen unsuccessful equipment made a mistake in selecting the correct rated power. This can lead to unstable operation, but this parameter is not the only one you should pay attention to when choosing which generator is needed for welding. The following data is important for the device:

• Rated power;
• Number of power phases;
• Reserve short-term power;
• Voltage.

Source: https://svarkaipayka.ru/oborudovanie/raznoe/kakoy-generator-nuzhen-dlya-svarochnogo-invertora.html

What power generator is needed for a welding inverter?

What kind of generator is needed for a welding inverter?

“Which generator to buy for inverter welding” is the question asked by most people who dream of mastering electric welding if they do not have the opportunity to connect a welding inverter to a household power supply. At the same time, if you buy any generator you come across, it won’t work, since it must meet a number of requirements, including being suitable in terms of power.

Welding is essentially a short circuit. Therefore, the generator will react accordingly to a short circuit. Not only will it constantly turn off when welding, but there is also a risk of the inverter failing. Therefore, you need to approach the choice of generator consciously. And if we don’t go into the types of existing generators, we can only say that only a synchronous type generator is suitable for welding with an inverter.

In addition, it is better to give preference to a generator with a copper alternator winding than one with aluminum. Generators with copper winding are more reliable in operation, they are able to carry loads much better. Well, we’ll talk about other parameters that influence the choice of a generator for welding with an inverter below, in this article from the construction magazine samastroyka.ru.

What kind of generator is needed for a welding inverter?

A generator for inverter welding must meet a number of the following requirements:

• Have a sufficient power reserve (about 20%);
• Be a synchronous type;
• Be compatible with inverter equipment.

When choosing a generator for welding, you must be guided by the following points:

• Inverter power consumption;
• The current required for welding;
• The diameter of the electrodes (depending on the thickness of the metal being welded).

It is precisely these nuances that you need to be guided by when choosing a generator for a welding inverter. At the same time, the power of the generator comes first, so that’s where we’ll start.

How much power does a generator need for inverter welding?

The selected generator for welding must have a power no lower than that of the inverter, but on the contrary, slightly higher, taking into account the required margin of 25%. Typically, the power of the generator and welding inverter can be found in the technical data sheet. At the same time, you should not make mistakes in the units of measurement, since very often the power of electrical appliances is indicated not in kW, but in kVA.

kW is active power, and kVA is the apparent power of an electrical appliance. If the power of the welding inverter is indicated in kVA, and you need to convert it to kW, then it is enough to use the following formula for calculation: where 10 kVA * 0.8 = 8 kW.

At the same time, you need to understand that the welding inverter will not always operate at full power, and here everything largely depends on the required current strength. And since the efficiency of the inverter for welding and the arc voltage always have a constant value, then calculating the power of the generator for welding is not so difficult.

The efficiency of the welding inverter is 85%, and the arc voltage is 25V.

Knowing these parameters, you can independently calculate how much power a generator is needed for inverter welding, based on the strength of the welding current. If the inverter for welding has a maximum current of 160 Amperes, and you need exactly this current for welding, then the power of the inverter will be equal to: 160A * 25V / 0.85 = 4705 W. Considering the required power reserve for the generator, which is at least 25%, you can easily calculate its optimal power: 4705 W + 25% = 5881 W, which is almost exactly 6 kW.

From all of the above, it becomes clear how exactly the current strength of the welding inverter affects the required power of the generator. Consequently, by reducing the current on the inverter, it will be possible to use a generator of much lower power, for example, 2.5 or 3 kW.

Here everything depends on the diameter of the welding electrodes and the thickness of the metal being welded.

For example, using electrodes up to 2 mm, you can weld from a 2.5 kW generator, the power of which will be quite enough for the welding inverter to produce the required current for welding.

Source: https://samastroyka.ru/kakoj-nuzhen-generator-dlya-svarochnogo-invertora.html

How to choose a generator for a welding machine

Welding work is impossible without a source of electricity. In places remote from civilization or simply in places where there is no access to a central power grid, gasoline and diesel generators are used. Not every electric generator is suitable for connecting a welding machine, but we will now find out which one is needed.

What electrical installations are needed for welding?

A regular household diesel or gasoline generator is not suitable for welding work. A unit that operates with variable loads is required. When you turn on the generator and welder, no energy is consumed and no load is created. It suddenly appears at the moment when you touch the metal with an electrode, igniting an electric arc.

After the electrode is removed and the arc disappears, the load is reduced again, and the electric generator engine idles. Not every installation is designed for such starting currents and loads, so by connecting the welding machine to a household generator, you can damage it (the alternator winding will burn out).

Conventional asynchronous gasoline and diesel generators produce wave-like voltage surges that greatly reduce the efficiency of the connected equipment and also shorten its service life. Welding requires a stable voltage.

How to choose a welding generator by type

To operate a welding machine on a de-energized construction site or at sites remote from the central power grid, you need one of two types of generators:

• Synchronous. This energy source is universal, so you can connect not only welding to it, but also any other household appliances and power tools.
• Welding. There are special welding generators that include two devices at once: a welding machine and an electric generator. Both devices match each other in terms of power and other parameters.

Note that transformer welding should not be connected even to synchronous gas generators, as it produces strong voltage surges.

engine's type

All power plants suitable for welding are divided into two large groups according to engine type:

• Two-stroke. Installations with such motors are cheaper. These are mainly household models, and they are not suitable for constant long-term operation, as they get very hot and have a number of performance limitations.
• Four-stroke. These engines are more powerful and water cooled. A welding generator with such a motor will last a long time, but it costs more than a 2-stroke model.

Fuel consumed

The type of fuel on which the electrical installation operates plays an important role. Which generator is needed for electric welding, choose taking into account the pros and cons of each type of model:

• Gasoline units start quickly and easily at ambient temperatures down to -15 degrees. They cost less than diesel engines and have a long service life.
• Diesel units are economical and make less noise, especially if they have a protective casing. Fuel poured into the tank does not lose its properties even during long periods of equipment downtime, but in cold weather it is more difficult to start the engine.

How much power does a generator need for a welding machine?

What power generator is needed for inverter welding - you need to decide on this question before purchasing the installation. This indicator is calculated using a simple formula: P = I * U / n

• I is the current strength of the welding connected to the generator;
• U – arc voltage;
• n – efficiency of the welding machine.

The U and n values ​​are generally stable, and the arc voltage is 25 volts and the efficiency is approximately 85%. Based on these data and the technical parameters of the welding machine, it is possible to calculate the power of a suitable generator.

Let's assume that the current limit of the device is 150 amperes. We substitute the data into the formula and get: 150A * 25V / 0.85 = 4412 watts.

To the obtained parameter you need to add 20-25% as a reserve, and in the end it turns out that for welding with a 150-amp machine you need a gasoline or diesel generator with a power of 5.5 kW.

Electrode diameter

When determining which generator to choose for a welding inverter, consider the diameter of the electrodes used during operation. It must match the minimum power of the installation.

Professional welders recommend adding a factor of 0.5 to the diameter of the electrode in millimeters. In this case, it turns out that when working with 3 mm electrodes, you need a generator with a minimum power rating of 3.5 kW (3 + 0.5), and for 4 mm electrodes, the power of the electric generator must be at least 4.5 kW.

Additional parameters of generators for welding machines

When choosing which generator is suitable for welding, in addition to the above basic characteristics, consider additional:

• welding current range – from 40 to 400 amperes;
• maximum welding current – ​​from 140 to 400 amperes;
• rated power – from 2 to 10 kW;
• number of phases – 1 (220 volts) or 3 (380 volts);
• type of starter for starting the generator (manual, automatic);
• type of sockets and their number;
• operating time without refueling is from 2 to 9 hours.

Which generator to buy for welding, regular or welding?

A welding electric generator that combines a gasoline/diesel generator with welding has a number of advantages:

• built-in short circuit protection;
• ease of use;
• more affordable price compared to the total cost of a separately purchased generator and welding machine;

Unfortunately, you can only use a welding generator for welding, and you cannot power the welding machine from a regular electrical outlet. You will not connect other equipment to the electric generator.

Welding electric generators of the 2-in-1 type are used by professionals who are forced to work in de-energized areas and on construction sites. For domestic conditions, it is better to buy a generator and a compact inverter welder separately.

Review of the best models of welding generators

To make it easier for you to choose which electric generator to choose for welding, we will consider the features of several popular installations in 2018-2019.

• Fubag WS 230DC ES. The unit has a high-strength frame made of powder-coated pipes. The maximum welding current is 230 amperes, and the 25-liter tank is enough to work for 9 hours. The device with a stabilizer produces 220 volts with constant voltage and is equipped with an electric starter for easy starting. The engine runs quite quietly - only 77 dB, and idling up to 65 volts ensures easy arc ignition. You can work with electrodes with a diameter of up to 5 mm.
• Huter DY6500LXW. Reliable and inexpensive German generator with a durable housing. The installation is suitable for open-air operation, since all components are protected from precipitation. The current reaches 200 amperes and the power is 5.5 kW. There is an electric and manual starter, and the tank capacity is 22 liters. The generator consumes about 2 liters of fuel per hour, starts quickly and operates at sub-zero temperatures or in extreme heat. Allows you to cook with electrodes up to 4 mm.
• EuroPower EP 300 XE. A powerful welding generator with high technical characteristics, suitable for any construction work. The device is capable of generating 2 voltage streams, which is distributed to sockets with a voltage of 220 and 380 volts. The DC power reaches 300 amperes, and the total power of the installation is 7 kW. The electric generator is powered by a reliable Honda motor and allows the use of electrodes up to 6 mm in diameter. There is an hour meter that indicates the need for engine maintenance - this allows you to avoid breakdowns in the midst of work.

Welding generators Foxweld, TCC, Vepr are also popular. If you have difficulty choosing, you can always contact our managers. They will help you make the right choice, taking into account the client's needs.  

Source: https://www.faznik.ru/articles/kak-vybrat-generator-dlya-svarochnogo-apparata/

How to choose the right welding generator of the required power

In conditions where there is no electricity supply, there is a need for a backup power source. For this purpose, welding generators of various powers are used. They are designed to work in “special” conditions. For example, at a construction site, the territory of which is remote from the centralized supply of electricity. It is undesirable to work with a transformer in such conditions, as power surges may cause a breakdown of the power plant.

Features of choosing a generator

Before choosing a gasoline generator for a welding machine, it is very important to pay attention to its power . With its large value, the gasoline welding generator operates in normal mode. He will always have a reserve of power.

The following selection criteria should be adhered to:

• To select a generator for inverter welding, you need to know the maximum current value. It is indicated on the body of the device. Designated Imax.
• Power calculation is determined by the formula of Ohm's law. Let's take Imax 23A. We multiply 23 by 220, we get 5060 W. Add 30% to the result obtained. The final power value of the device will be 6600 W.
• Which gas generator is needed for a welding inverter depends on the diameter of the electrodes used. This size must be suitable for the power of the device. For example, the operation of electrodes with a diameter of less than 2 mm requires a power of 2.5 kW. When the diameter increases to 3 mm, the power value also becomes greater - 3.5 kW.
• When determining how much power a generator is needed for inverter welding, it is necessary to take into account the voltage of the outlets. The inverter model must match this value. For a household system, an ordinary 220 V outlet is sufficient.
• Very powerful inverters with a three-phase connection must be plugged into sockets that can withstand 380 V.
• Professionals advise taking into account the weight of the device. The compact wheeled system is suitable for frequent transport.

Selection of generator for welding

When the design of a gas-welding generator is equipped with cast iron sleeves, its service life increases dramatically. These devices can be used for approximately 1500 operating hours. Aluminum analogues have a shorter service life.

Today you can purchase inverter units that have power factor adjustment. These systems can work with a variety of generator models as they can be set to low voltage.

Such models are designated by the additional prefix PFC. In principle, welding gas generators are not intended for continuous use. They require a short break.

Diesel models are suitable for daily, long hours of work. A device with a power of 0.7-5 kW is suitable for working on a personal plot. These products do not have much weight. Therefore, they are easy to transport from place to place. A power of 10 kW allows you to perform daily work for 8 hours.

Source: https://pochini.guru/instrument/kak-vyibrat-svarochnyiy-generator

How much power does a generator need for inverter welding?

When choosing a welding generator, you need to take into account many characteristics. But from the total number it is worth highlighting those that are really important and decisive:

• Power;
• Welding current;
• Electrode diameter;
• Can the generator work with inverter equipment?

There are synchronous, asynchronous and inverter installations on the market. For welding, you need a synchronous generator, since an inverter generator cannot handle a high starting load, and it is weaker in power.

Calculating power

The power of the welding generator and inverter can be found in the technical documentation. You definitely need to take care of its reserve (at least a quarter of the maximum value). If this is not done, then prolonged operation of the generator at maximum values ​​may negatively affect its performance and characteristics.

It is important to understand the difference between rated and maximum power parameters, and not to confuse the units of measurement (kVA and kW).

Confusion in this issue arises due to the fact that the power consumed by the inverter is always indicated in kW, and on some generator models the manufacturer may indicate kVA (kilo Volt Ampere).

This is most often practiced by Chinese manufacturers. To correctly calculate equipment compliance, you need to recalculate the kVA values ​​using the formula:

1 kW = 1 kVA x KM (power factor)

For reference, the power factor of a welding inverter can be in the range of 0.6 – 0.7.

Example of power calculation

Let's calculate the parameters of an inverter welding generator for a welding machine with a welding current of 160A. Inverter units allow you to adjust the welding current over a wide range. This means that the station can operate at both maximum and minimum current. To calculate the maximum power consumption, you need to take the maximum welding current, multiply it by the arc voltage (usually 25 V) and divide the result by the efficiency of the inverter (usually 0.85).

In our example it would be: 160 A x 25 V / 0.85 = 4,705 W.

In this way we obtained a maximum power value of 4.7 kW.

Current strength

When organizing inverter welding, it is allowed to use a generator with a power lower than that of the inverter. But in this case, you will have to reduce the current to an acceptable level.

Electrode diameter

When choosing a welding generator, you need to remember that its power corresponds to the permissible diameter of the electrodes used. To figure out which unit you need, study the simple table:

diameter, mm	generator power, kW
2	2,5
3	3,5
4	4,5

Recommendations for choosing a generator

When purchasing an installation for an inverter welding machine, listen to several recommendations from experienced professionals. So, which unit and when will be the best choice:

• If you need a station with a power of up to 10 kW, it is better to pay attention to gasoline units. In this range, the market offers a wide choice of models. If it is necessary to purchase more powerful stations, a diesel modification becomes a profitable purchase.
• The presence of even a small power reserve of a gasoline station, 10-20%, will significantly facilitate the process of igniting the arc. If we are talking about a diesel generator, the reserve should be greater - up to 50%.
• The most practical and functional will be installations with cast iron sleeves. Such stations have a minimum service life of 1.5 thousand engine hours. If the generator has an aluminum block, then you can count on a power reserve of about 500 hours.

Our experienced staff will help you significantly simplify the task of choosing equipment with the desired parameters and characteristics. Depending on the situation, we will recommend exactly the model that suits you best. Call now!

Source: https://energoplaza.com/statji/vybor-generatora-dlya-svarochnogo-invertora/

How to choose a generator (power station) for a welding inverter. Articles of the company "ChUP

Oct 20, 2017

“Which generator is suitable for welding” is a question that often arises among people who have decided to seriously engage in welding on their own and at the same time do not have the opportunity to connect the welding machine to the network. It’s easy to get confused, especially after we see a huge list of available models on the online store page.

It would seem that it is very difficult to understand this diversity, especially if you have a liberal arts education behind you. In fact, any of us can choose the right generator for a welding inverter; to do this, you just need to know a few small but very important nuances. They will be discussed in this article.