How to make a homemade generator from an induction motor. Do it yourself electric generator. DIY Homemade water electric generators

The problem of power grids in our country is not only that energy is constantly becoming more expensive, but also in their absence in some areas. And in a number of remote villages and towns, centralized power supply is so rare that there is a need for a generator.

How to be?

Of course, the modern market offers hundreds of such models that can provide even a small village with energy. The only difficulty is that their cost sometimes exceeds the average salary for a couple of months. Is it possible to make an electric generator with your own hands?

Generator based on an old chainsaw

We’ll make a reservation right away that we will consider only options with the maximum “return”, since for the sake of powering a pair of light bulbs we need to build homemade generator not worth it. It is best to design a device based on a chainsaw engine, as it will provide energy without any problems. Vacation home medium sizes. Before you make an electric generator, calculate the power consumption of all your devices.

What model to take?

Given the prevalence of old models of saws, it is best to get the old Druzhba or Ural.

Where to get a generator

If you feel like a descendant of the legendary Lefty, then you can cast all the details yourself, and make the winding yourself. But all this is so complicated that a do-it-yourself electric generator will simply be unprofitable. So it's best to take a generator from KAMAZ or some kind of agricultural machine.

Requirements

If you take an old domestic saw, then its engine may well pull even 2-3 kW. But optimally - no more than 1.5 kW. The choice of a car generator is good because it maintains optimal voltage even with an engine speed difference of 1-5 thousand per minute.

Converter

Since for the above reasons (turns) it is impossible to use a normal 220V electric generator, you need to attach a converter to your design with your own hands. Pay attention to the MAP Energy inverter, which is easy to find on free sale.

How to connect?

The best solution is to make a special interchangeable block that can be quickly connected to the saw, and just as quickly dismantled. In this case, such a device is easy to take on a hike, as you will need its versatility. For fastening, either an old saw bar or a homemade bracket is used. The optimal connection is belt, since chain drive too noisy, and even requires lubrication. The belt must be chosen so that the generator (it is easy to make it with your own hands) is located as close as possible to the saw itself.

Other characteristics

We connect the generator output (using a 30-40 Ampere ammeter) and a switch with a battery of suitable capacity, and we hook it to a voltage converter. It is highly desirable to provide a voltmeter in this circuit, since otherwise, due to some kind of malfunction, you can easily burn valuable equipment.

How to use

Since you don’t have a speed controller, you will have to pick them up so that the engine “growls” slightly. Of course, this will slightly increase fuel consumption. To facilitate the operation of the mechanism, you just need a high-capacity battery, which will take over most loads at peak times. Such stability will have a positive effect not only on the output voltage, but on the entire mechanism.

Thus, it is quite possible to make an electric generator on your own.

Uninterrupted power supply is the key to a comfortable life at any time of the year.

To organize an autonomous power supply for a home, an asynchronous generator is often used, which can also be done by hand.

What it is

An asynchronous generator is an alternating current device that, using the principle of operation induction motor can produce electrical energy. It is also called induction. An asynchronous electric generator provides a quick turn of the rotor, while the rotation speed is much higher than if they were rotated by a synchronous analogue of the device. A conventional AC induction motor can be used as a generator without any additional settings or circuit conversions.

Photo - asynchronous generator

Scope of use asynchronous generator is quite broad:

1. They are used as engines for wind farms;
2. In order to provide autonomous power for a house or apartment, or as a miniature hydroelectric power station;
3. As an inverter (welding) generator;
4. For organization uninterruptible power supply from alternating current.

In this case, a single-phase asynchronous generator must be turned on using the input voltage. Usually for this the device is connected to power. But some models can work independently, by self-excitation, by connecting capacitors in series.
Video: asynchronous motor device

Principle of operation

An asynchronous electrical generator produces electrical energy when the rotor speed is faster than synchronous. For the most common generator, this figure is in the range of 1800 rpm, while the synchronous speed characteristics are about 1500 rpm.

Generator circuit

The principle of operation of an asynchronous generator is based on the conversion of mechanical energy into current energy, i.e., electrical. In order for the rotor to start spinning and generate current, a fairly strong torque is needed. The ideal, according to electricians, is the so-called "perpetual idle", in which an equal rotation speed is maintained throughout the entire operation of the asynchronous generator.

How to do it yourself

Buying an asynchronous generator is an expensive pleasure, especially since you can make it yourself. The principle of operation is simple, the main thing is to provide yourself with the necessary tools.

1. According to the principle of operation of the device, you need to adjust the generator so that its rotation speed is higher than the engine speed. To do this, connect the electric motor to the network and start it. To calculate the speed of rotation of the engine, you need to use a tachogenerator or tachometer;
2. Add 10% to the resulting value. Let's say the engine specifications are 1200 rpm, so the generator should have 1320 rpm (1200 * 0.1% = 120, 120 + 1200 = 1320 rpm);
3. Further, the conversion of an asynchronous motor into a generator includes the selection of the required capacity for the capacitors used (each capacitor between phases is similar to the previous one);
4. Make sure that the capacitance is not too large, otherwise the asynchronous generator will heat up;
5. Select the capacitors necessary to provide a certain rotational speed, the calculation of which was made above. Their installation requires special care, it is very important that they are insulated with special coatings.

This completes the arrangement of the generator based on the engine. Now it can be installed as a power source. It is important to remember that a squirrel-cage device produces a fairly high voltage, so if you need a figure of 220 V, there is a reason to install a step-down transformer.

Scheme of switching on the engine as a generator

This is how the diagram looks like, how to make a wind generator from an asynchronous motor, here the main differences are in the speed of rotation and in the principle of switching on. As an example, we present you a scheme of a wind power plant, which includes an asynchronous gasoline generator.

At the same time, it should be noted that it does not work with self-feeding, in most cases, a special walk-behind tractor or a control unit similar to an ignition switch is used to turn on such a generator.

Video: making an asynchronous generator from single phase motor- Part 1

Part 2

Part 3

Part 4

Part 5

Part 6

As a generator with low power, even single-phase asynchronous motors from household electrical appliances - Geko washing machines, drainage pumps, etc. can be used. Like a two-bearing motor, the motor from such devices must be connected in parallel with their winding. Another way is to use phase shift capacitors. They do not always differ in the required power, so it will be necessary to increase it to the required indicators. Such a simple generator could be used to power light bulbs or modems. If you slightly alter the circuit, then you will be able to connect this stand-alone device even to a heater or electric stove. You can also make a similar permanent magnet generator.

Photos - few powerful generator

1. Any asynchronous generator (gas generator, electric, brushless) is considered a device with an increased level of danger, so try to isolate it;
2. Each autonomous generator must be equipped with additional measuring devices in order to record data on its operation. It should be a frequency meter or tachometer, as well as a voltmeter;
3. It is advisable to equip the generator with on and off buttons;
4. This type of electric generator, without fail, is grounded;
5. Be prepared for the fact that the efficiency of an asynchronous generator will drop by 30, and sometimes by 50% - this phenomenon is inevitable when converting mechanical energy into electrical energy;
6. If necessary, the device can be replaced by synchronous brushless generators such as GS-200 or GS-250, asynchronous AIR 63, ECC 5-93-4u2 (75 kW), and others, the price of which is from 30,000 rubles in Krasnoyarsk and from 35,000 in Moscow;
7. The thermal regime of an asynchronous generator is very important. Like an internal combustion engine, it can heat up from idle move, monitor the temperature of the device.

Wind turbines continue to grow in popularity. They are most often interested in people living in rural areas and having the opportunity to install such impressive structures on their plots. But, given the high cost of this equipment, not everyone can afford to buy it. Let's see how to make a DIY wind turbine and save money on creating your own alternative source. electrical energy.

Wind generator - a source of electricity

Tariffs for public utilities rise at least once a year. And if you look closely, then in some years the same electricity rises in price twice - the numbers in payment documents grow like mushrooms after rain. Naturally, all this hits the pocket of the consumer, whose income does not show such a steady growth. And real incomes, as statistics show, show a downward trend.

Until quite recently, it was possible to fight against the growth of electricity tariffs in one simple, but illegal way - with the help of a neodymium magnet. This product was applied to the body of the flowmeter, as a result of which it stopped. But we strongly do not recommend using this technique - it is unsafe, illegal, and the fine upon capture will be such that it will not seem small.

The scheme was just great, but subsequently it stopped working for the following reasons:

The frequent control rounds began to massively identify unscrupulous owners.

• Control rounds have become more frequent - representatives of regulatory authorities go from house to house;
• Special stickers began to be pasted on the counters - under the influence of a magnetic field they darken, exposing the intruder;
• Counters became immune to magnetic field- electronic registration nodes are installed here.

So people began to pay attention alternative sources electricity, such as wind turbines.

Another way to expose the violator who steals electricity is to conduct an examination of the level of magnetization of the meter, which easily reveals the facts of theft.

Windmills for the home are becoming commonplace in areas where winds often blow. The wind power generator uses the energy of wind air currents to generate electricity. To do this, they are equipped with blades that drive the rotors of the generators. The resulting electricity is converted into direct current, after which it is transmitted to consumers or stored in rechargeable batteries.

Wind generators for a private house, both homemade and factory assembled, can be the main or auxiliary sources of electricity. Here is a typical example of the operation of an auxiliary source - it heats the water in the boiler or feeds low-voltage home lights, while the rest of the home appliances are powered by the main power supply. It is also possible to work as the main source of electricity in houses not connected to electrical networks. Here they feed:

• Chandeliers and lamps;
• Large household appliances;
• Heating appliances and more.

Accordingly, in order to heat your home, you need to make or purchase a 10 kW wind farm - this should be enough for all needs.

The wind farm can power both traditional electrical appliances and low-voltage ones - they operate on 12 or 24 volts. Wind generator for 220 V is carried out according to the scheme using inverter converters with the accumulation of electricity in batteries. Wind generators for 12, 24 or 36 V are simpler - simpler battery charge controllers with stabilizers are used here.

Homemade wind generator for the home and its features

Before we tell you how to make a windmill to generate electricity, let's talk about why you can't use the factory model. Factory wind turbines are indeed more efficient than their homemade counterparts. Everything that can be done in production will be more reliable than what can be done in artisanal conditions. This rule also applies to wind turbines.

Self-manufacturing of a wind generator is beneficial for its low cost. Factory samples with a capacity of 3 kW to 5 kW will cost 150-220 thousand rubles, depending on the manufacturer. Such a high price explains the inaccessibility of store models for most consumers, because it also affects the payback period - in some cases it reaches 10-12 years, although some models “beat off” themselves much earlier.

Factory wind farms for the home are more reliable and less likely to break down. But each breakdown can lead to gigantic costs for spare parts. As for homemade products, they are easy to repair on their own, as they are assembled from improvised materials. This justifies far from the most perfect design.

Yes, it will be very difficult to make a 30 kW wind generator with your own hands, but anyone who knows how to work with tools will be able to assemble a small windmill of low power and provide for themselves necessary quantity electricity.

Scheme of a homemade wind generator - the main components

Do homemade wind generator relatively easy at home. Below you can see a simple drawing explaining the location of the individual nodes. According to this drawing, we need to make or prepare the following nodes:

Scheme of a homemade windmill.

• Blades - they can be made from a variety of materials;
• Generator for a wind generator - you can buy ready-made or make it yourself;
• Tail section - directs the blades in the direction of the wind, allowing you to achieve maximum efficiency;
• Multiplier - increases the rotation speed of the shaft (rotor) of the generator;
• Mounting mast - all of the above nodes will be held on it;
• Tension cables - hold the entire structure and prevent it from falling from gusts of wind;
• The charge controller, batteries and inverter provide the conversion, stabilization and accumulation of the received electricity.

We will try to make a simple rotary wind generator with you.

Step-by-step instructions for collecting a wind generator

Make a windmill out of plastic bottles even a child can. It will spin merrily in the wind, making noise. There is a huge number of various schemes for the construction of such windmills, in which the axis of rotation can be located both vertically and horizontally. Such things do not give electricity, but they perfectly disperse moles on household plots, which harm plants and dig their minks everywhere.

A homemade wind generator for the home is somewhat similar to such a bottle windmill. Only in size it is larger, and the design is more serious. But if you attach a small motor to such a windmill, then it can become a source of electricity and even power some electrical thing, for example, an LED - its power is not enough for more. Looking at the diagram of such a “toy”, you can understand how to make a full-fledged wind generator.

Making a generator for a windmill

In order to assemble a wind farm, we need a generator, and with self-excitation. In other words, its design must contain magnets that induce electricity in the windings. This is how some electric motors are arranged, for example, in screwdrivers. But it will not work to make a decent wind generator from a screwdriver - the power will be simply ridiculous, the maximum will be enough to operate a small LED lamp.

It will also not work to make a wind farm from an autogenerator - it uses an excitation winding powered by a battery, so it does not suit us. From a household fan, we can only make a scarecrow for birds attacking the garden. Therefore, you need to look for a normal self-excited generator of suitable power. Better yet, splurge and buy a purchased model.

It is really more profitable to buy a generator than to make it - the efficiency of a factory model will be higher than that of a homemade one.

Let's see how to make a generator for our windmill with our own hands.

His maximum power is 3-3.5 kW. For this we need:

• Stator - it is made of two pieces sheet metal, cut in the form of circles with a diameter of 500 mm. 12 neodymium magnets with a diameter of 50 mm are glued to each circle along the edge (slightly departing from the edge). Their poles must alternate. Similarly, we prepare the second circle, but only the poles here should be located with a shift;
• Rotor - it is a design of 9 coils wound with copper wire with a diameter of 3 mm in varnish insulation. We make 70 turns in each coil, although some sources recommend making 90 turns. To place the coils, it is necessary to make a base from a non-magnetic material;
• Axis - it must be done exactly in the center of the rotor. Moreover, there should be no beats, the structure must be carefully centered, otherwise it will be quickly broken by the wind.

We place the stators and the rotor - the rotor itself rotates between the stators. A distance of 2 mm is maintained between these elements. We connect all the windings according to the diagram below, so that we get a single-phase AC source.

We make blades

In this review, we are making a fairly powerful wind generator - its power will be up to 3-3.5 kW in strong winds or up to 1.5 or 2 kW in moderate winds. Moreover, it will turn out to be quite silent, unlike generators on electric motors. Next, you need to think about the location of the blades. You and I decided to make a simple three-blade horizontal wind generator. One could also think about a vertical wind generator, but in this case, the wind energy utilization factor will be lower - an average of 0.3.

If done vertical wind generator, then he will have only one advantage - he will be able to work in any direction of the wind.

At home, the easiest way is to make simple blades. For their manufacture, you can use various materials:

• Wood - however, over time it can crack and dry out;
• Polypropylene - this type of plastic is suitable for low-power generators;
• Metal is a reliable and durable material from which blades of any size can be made (duralumin used in aviation is well suited).

A small table will help to estimate the diameter of the blades. Check the approximate wind speed in your local and find out what diameter the blades for the wind generator need to be made.

Making blades for a wind turbine is not so difficult. It is much more difficult to make sure that our entire structure is balanced - otherwise strong gusts of wind will quickly break it. Balancing is done by correcting the length of the blades. After that, we combine the blades with the rotor of our wind generator and install the structure on the mounting site, to which the tail section is attached.

Startup and verification

The most important thing in the future is to choose the right place to install the mast. It must be strictly vertical. The bladed generator is placed as high as possible, where the wind is strongest. Make sure that there are no forest plantations, detached trees, houses and large structures blocking the air flow nearby - if there is any interference, place the wind generator at a distance from them.

As soon as the wind generator starts to move, you need to do the following - connect a multimeter to the generator outlet and check for voltage. Now the system is ready for full operation, it remains only to decide what voltage will be supplied to the house and how it will happen.

Connecting consumers

We have already managed to make a low-noise windmill, and quite powerful. It's time to connect the electronics to it. When assembling wind turbines with your own hands for 220V, you need to take care of purchasing inverter converters. The efficiency of these devices reaches 99%, so the losses in the conversion of the supplied DC into alternating current with a voltage of 220 volts will be minimal. In total, the system will have three additional nodes:

• Battery pack - accumulates excess generated electricity for the future. These surpluses are used to feed consumers during periods of calm or at times when it blows very weakly;
• Charge controller - controls the charging current, extending the life of the batteries;
• Converter - converts direct current into alternating current.

A scheme is also possible when household appliances are installed in the house and lighting capable of operating with a voltage of 12 or 24 volts. In this case, the need for an inverter converter is eliminated. As for the power supply for cooking appliances, in order not to create an excessive load on the wind generator, we recommend using gas equipment powered by a bottle of liquefied gas.

220V wind generators are beneficial when there is already equipment in the house that runs on alternating current with the specified voltage.

Video

Constant and uninterrupted supply of electricity in the house is the key to a pleasant and comfortable pastime at any time of the year. To organize autonomous power supply suburban area, we will have to resort to mobile installations - electric generators, which in last years especially popular due to the wide range of the most different capacities.

Scope of application

Many are interested in how to make an electric generator for a summer cottage? We will talk about this below. In most cases, an asynchronous alternator is applicable, which will produce energy for the operation of electrical appliances. In an asynchronous generator, the speed of rotation of the rotors than in a synchronous one and the efficiency will be higher.

However, power plants have found their application in a wider range, such as excellent tool for energy production, namely:

• They are used in wind farms.
• Used as welding machines.
• They provide autonomous support for electricity in the house on a par with a miniature hydroelectric power station.

The unit is switched on using the input voltage. Often, the device is connected to power to start up, but this is not entirely logical and rational decision for a mini-station, which itself must generate electricity, and not consume it to run. Therefore, in recent years, generators with self-excitation or series switching of capacitors have been actively produced.

How an electric generator works

An asynchronous power generator produces a resource if the speed of rotation of the motor is faster than synchronous. The most common generator operates on parameters from 1500 rpm.

It produces power if the rotor at start is running faster than the synchronous speed. The difference between these figures is called slip and is calculated as a percentage of the synchronous speed. However, the stator speed is even higher than the rotor speed. Due to this, a stream of charged particles is formed that changes polarity.

Watch the video, how it works:

When energized, the connected power generator device takes control of the synchronous speed by independently controlling the slip. The energy leaving the stator passes through the rotor, however, the active power has already moved to the stator coils.

The basic principle of operation of an electric generator is to convert mechanical energy into electrical energy. To start the rotor to generate power, a strong torque is needed. The most adequate option, according to electricians, is "perpetual idling", which maintains one speed of rotation during the operation of the generator.

Why use an asynchronous generator

Unlike a synchronous generator, an asynchronous one has a huge number of advantages and benefits. The main factor in choosing the asynchronous option was the low clear factor. A high clear factor characterizes the quantitative presence of higher harmonics in the output voltage. They cause useless heating of the motor and uneven rotation. Synchronous generators have a clear factor value of 5-15%, in asynchronous generators it does not exceed 2%. It follows from this that an asynchronous power generator produces only useful energy.

A little about the asynchronous generator and its connection:

An equally significant advantage of this type of generator is the complete absence of rotating windings and electronic parts that are sensitive to damage and external factors. Therefore, this type of apparatus is not subject to active wear and tear and will last longer.

How to make a generator with your own hands

Device asynchronous alternator

The purchase of an asynchronous electric generator is a rather expensive pleasure for the average resident of our country. Therefore, many craftsmen resort to solving the issue of self assembly device. The principle of operation, as well as the design, is quite simple. With all the tools, assembly will not take more than 1-2 hours.

According to the above-described principle of operation of the electric generator, all equipment should be adjusted so that the rotations are faster than the engine revolutions. To do this, you must connect the engine to the network and start it. Use a tachometer or tachogenerator to calculate RPM.

After determining the value of the engine speed, add 10% to it. If the rotation speed is 1500 rpm, then the generator should be running at 1650 rpm.

Now you need to remake the asynchronous generator "for yourself", using capacitors of the required capacities. Use the following plate to determine the type and capacity:

DL capacity table

We hope that it is already clear how to assemble an electric generator with your own hands, but please note: the capacitance of the capacitors should not be very high, otherwise the generator running on diesel fuel will get very hot.

Install the capacitors according to the calculation. Installation requires a fair amount of attention. Ensure good insulation, if necessary, use special coatings.

Based on the engine, the generator assembly process is completed. Now it can already be used as a necessary source of energy. Remember that in the case when the device has a squirrel-cage rotor and produces a sufficiently serious voltage that exceeds 220 volts, it is necessary to install a step-down transformer that stabilizes the voltage at the required level. Remember that in order for all appliances in the house to work, there must be strict control of a home-made 220-volt electric generator in terms of voltage.

Watch the video, the stages of work:

For a generator that will run at low power, single-phase induction motors from old or unwanted household appliances, such as washing machines, drain pumps, lawn mowers, chainsaws, etc., can be used to save money. Motors from such household appliances should be connected in parallel with the winding. Alternatively, phase-shifting capacitors can be used. They rarely differ in required power, so that it will need to be increased to the required indicators.

Such generators show themselves very well when it is necessary to power light bulbs, modems and other small devices with a stable active voltage. With certain knowledge, you can connect an electric generator to an electric stove or heater.

The ready-to-operate generator should be installed so that it is not affected by precipitation and environment. Take care of an additional casing that will protect the installation from adverse conditions.

Almost every asynchronous generator, whether it is a brushless, electric, gasoline or diesel generator, is considered a device with enough high level danger. Handle such equipment very carefully and always keep it protected from external weather and mechanical influences or make a casing for it.

We watch video good advice specialist:

Any autonomous unit should be equipped with special measuring instruments that will record and display performance data. To do this, you can use a tachometer, voltmeter and frequency meter.

• Equip the generator with an on/off button if possible. You can use manual start to start.
• Some power generators need to be grounded before use, carefully assess the area and select a site for installation.
• When converting mechanical energy into electrical energy, sometimes the efficiency can drop to 30%.
• If you are not confident in your abilities or are afraid to do something wrong, we advise you to purchase a generator in the appropriate store. Sometimes the risks can turn out to be extremely deplorable ...
• Monitor the temperature of the asynchronous generator and its thermal regime.

Results

Despite their ease of implementation, homemade power generators are very painstaking work that requires complete focus on design and correct connection. The assembly is financially feasible only if you already have a workable and unnecessary engine. Otherwise, you will pay more than half of its cost for the main element of the installation, and the total costs may significantly exceed the market value of the generator.

Now you know how to make an electric generator and if you firmly decided to create it, we hope you got answers to all your questions before starting the assembly and now you can get to work with a full knowledge base.

In conclusion, I would like to offer you the assembly of a wonderful invention of one engineering student. This is a weak generator that can save you in difficult times without spending Money even for fuel.

generatorvolt.ru

Homemade generator. All ways with your own hands

Method 1

I found an article on the Internet on how to convert a car generator to a generator with permanent magnets. Is it possible to use this principle and remake the generator with your own hands from asynchronous motor? It is possible that there will be large energy losses, not such an arrangement of coils.

I have an asynchronous type motor for a voltage of 110 volts, revolutions - 1450, 2.2 amperes, single-phase. With the help of containers, I do not undertake to make a home-made generator, as there will be large losses.

It is proposed to use simple engines according to this scheme.

If you change the engine or generator with rounded magnets from the speakers, then you need to install them in crabs? Crabs are two metal parts, anchored outside the excitation coils.

If magnets are put on the shaft, then the shaft will shunt the magnetic lines of force. How then will the excitement be? The coil is also located on a metal shaft.

If you change the connection of the windings and make a parallel connection, accelerate to a speed above normal values, then you get 70 volts. Where can I get a mechanism for such revolutions? If you rewind it to a decrease in speed and lower power, then the power will drop too much.

An induction motor with a closed rotor is iron, which is filled with aluminum. You can take a homemade generator from a car, which has a voltage of 14 volts, a current of 80 amperes. This is good data. Motor with AC collector from a vacuum cleaner or washing machine can be applied to the generator. Install bias on the stator, remove the DC voltage from the brushes. According to the highest EMF, change the angle of the brushes. The efficiency tends to zero. But, better than a synchronous type generator, they did not invent.

I decided to try a homemade generator. A single-phase asynchronous motor from a baby washer twisted with a drill. I connected a capacitance of 4 microfarads to it, it turned out 5 volts 30 hertz and a current of 1.5 milliamps for a short circuit.

Not every electric motor can be used as a generator in this way. There are motors with a steel rotor that have a low degree of magnetization on the remainder.

It is necessary to know the difference between electrical energy conversion and energy generation. There are several ways to convert 1 phase to 3. One of them is mechanical energy. If the power plant is disconnected from the socket, then all conversion is lost.

It is clear where the movement of the wire with an increase in speed comes from. Where the magnetic field will be to obtain the EMF in the wire is not clear.

It's easy to explain. Due to the mechanism of magnetism that remains, an EMF is formed in the armature. There is a current in the stator winding, which is closed to the capacitance.

The current has arisen, which means that it gives an increase in the electromotive force on the coils of the rotor shaft. The emerging current gives an increase in the electromotive force. The stator electric current generates much more electromotive force. This goes until the equilibrium of the stator magnetic fluxes and the rotor is established, as well as additional losses.

The size of the capacitors is calculated so that the voltage at the terminals reaches the nominal value. If it is small, then reduce the capacity, then increase it. There were doubts about the old motors, which supposedly are not excited. After accelerating the rotor of a motor or generator, it is necessary to poke quickly into any phase with a small amount of volts. Everything will return to normal. Charge the capacitor to a voltage equal to half the capacitance. Turn on with a three-pole switch. This applies to a 3-phase motor. Such a scheme is used for generators of passenger transport cars, since they have a squirrel-cage rotor.

Method 2

You can make a homemade generator in another way. The stator has a tricky design (has a special design solution), it is possible to adjust the output voltage. I made a generator of this kind with my own hands at the construction site. The engine took a power of 7 kW at 900 rpm. I connected the excitation winding according to the triangle circuit for 220 V. I started it at 1600 revolutions, the capacitors were 3 at 120 microfarads. They were switched on by a contactor with three poles. The generator acted as a three-phase rectifier. From this rectifier, an electric drill with a 1000-watt collector was fed, and a circular saw for 2200 watts, 220 V, grinder 2000 watts.

I had to make a soft start system, another resistor with a shorted phase after 3 seconds.

For motors with manifolds, this is not correct. If the rotating frequency is doubled, then the capacitance will also decrease.

The frequency will also increase. The tank circuit was switched off in automatic mode so as not to use the reactivity torus, not to consume fuel.

During operation, it is necessary to press the stator of the contactor. Three phases dismantled them out of uselessness. The reason lies in the high gap and increased field dissipation of the poles.

Special mechanisms with a double cage for squirrels and slanting eyes for squirrels. Still, I received 100 volts and a frequency of 30 hertz from the washing machine motor, the 15-watt lamp does not want to burn. Very weak power. It is necessary to take the motor stronger, or put more capacitors.

Under the wagons, a generator with a squirrel-cage rotor is used. Its mechanism comes from a gearbox and a belt drive. Turns of rotation 300 turns. It is located as an additional load generator.

Method 3

You can design a homemade generator, a gasoline power plant.

Instead of a generator, use a 1.5 kW 3-phase asynchronous motor at 900 rpm. The electric motor is Italian, it can be connected with a triangle and a star. First, I put the motor on a base with a DC motor, connected it to the coupling. Started turning the engine at 1100 rpm. There was a voltage of 250 volts on the phases. I connected a 1000 watt light bulb, the voltage immediately dropped to 150 volts. It's probably due to phase imbalance. Each phase must be connected to a separate load. Three light bulbs of 300 watts will not be able to reduce the voltage to 200 volts, theoretically. You can put more capacitor.

The engine speed must be increased, do not reduce under load, then the power supply to the network will be constant.

Significant power is needed, the autogenerator will not give such power. If you rewind a large KAMAZ one, then 220 V will not come out of it, since the magnetic circuit will be oversaturated. It was designed for 24 volts.

Today I was going to try to connect the load through a 3-phase power supply (rectifier). The lights were turned off in the garages, it didn't work. In the city of power engineers, the electricity is systematically turned off, so it is necessary to make a source of constant power supply with electricity. For electric welding there is a hitch, it is hooked to the tractor. To connect an electric tool, you need a constant voltage source of 220 V. There was an idea to design a home-made generator with your own hands, and an inverter to it, but you can’t work on batteries for a long time.

The electricity was recently turned on. I connected an asynchronous motor from Italy. I put it with the chainsaw motor on the frame, twisted the shafts together, put a rubber clutch. I connected the coils according to the star scheme, the capacitors in a triangle, 15 microfarads each. When I started the motors, the power output did not work. I attached a capacitor charged to the phases, the voltage appeared. The engine gave out its power of 1.5 kW. At the same time, the supply voltage dropped to 240 volts, at idle it was 255 volts. The grinder from him worked fine at 950 watts.

I tried to increase the engine speed, but the excitation does not work. After the contact of the capacitor with the phase, the voltage appears immediately. I will try to install another engine.

What system designs are produced abroad for power plants? On 1-phase, it is clear that the rotor owns the winding, there is no phase imbalance, because there is one phase. In 3-phase, there is a system that gives power adjustment when motors with the highest load are connected to it. You can also connect an inverter for welding.

Over the weekend I wanted to make a homemade generator with my own hands with an asynchronous motor connected. A successful attempt to make a home-made generator turned out to be the connection of an old engine with a cast iron housing for 1 kW and 950 rpm. The motor is excited normally, with one capacitance of 40 uF. And I installed three containers and connected them with a star. This was enough to start an electric drill, a grinder. I wanted to get the output of voltage on one phase. To do this, I connected three diodes, a half-bridge. The fluorescent lamps for lighting burned out, and the bags in the garage burned out. I will wind the transformer in three phases.

electronics.ru

How to make a 220 volt gas generator with your own hands and what is needed for this?

There is no need to look for the benefit of your own gas generator, it lies on the surface.

garage owners, summer cottages, private houses (provided that these objects have an unreliable power supply, or are not electrified at all) have long appreciated the benefits of backup power supply.

Even if you live in a cottage village with a normal supply of electricity, emergencies are possible. Loss of energy for a long time will lead to spoilage of food in the refrigerator in summer, and malfunctions of the heating boiler in winter.

Therefore, many homeowners purchase industrial generators, the cost of which cannot be called economical.
Another direction for mobile power plants is tourism, expeditions and offline work using power tools.

This useful device does not belong to too complex devices, so it is quite possible to assemble a gas generator with your own hands, including for 220 volts.

Of course main reason such a decision is the desire to save. If you buy components for a mobile power plant in a store, the cost of parts will exceed the savings on assembly.

Therefore, a home-made gas generator will become profitable only if there are shareware components.

The most expensive spare parts are: a drive (gasoline engine) and an electric motor that will act as a generator. It is they who must be selected from the “junk” available in the storerooms.

What power plant can be selected for the generator?

First of all, power. In mobile power plants, the following ratio is applied: for each kilowatt of electricity generated (not in peak, but in normal mode), 2-3 l / s of the engine is supplied.

Important! This proportion works with well-chosen components and minimal losses. It should be remembered that even the most inexpensive generator from the Celestial Empire was designed by engineers.

As a rule, gas generators are developed in a complex, that is, a generating element is developed for a specific motor. For homemade installation you should choose a coefficient of 2-4 l / s per 1 kilowatt of energy. Otherwise, at full load, the engine will quickly fail.

In practice, when assembling a power plant “from what was”, home craftsmen often install a motor / generator pair without preliminary calculation. Sometimes there are options for "splicing" enough powerful engine, on the occasion of a bottle of moonshine bought from a friend of the ensign, with a motor from a sewing machine. And vice versa.
It is recommended to collect as much technical information about the components as possible before calculating their compatibility.

Important! When calculating the generator/motor pair, the final load power (taking into account the electrical body kit and conversion losses) should be taken into account, and not the net power on the generator winding.

Chainsaw or trimmer engine

Unpretentious mechanism, very easy to maintain. Usually two stroke.
This scheme has both advantages and disadvantages. On the one hand, you are not worried about the question of what kind of oil to fill in the gas generator (it is added to gasoline, like on old mopeds). Maintenance actually absent as a class.

On the other hand, high fuel consumption and a pungent smell from the muffler. The removal of exhaust gases from the gas generator is mandatory, especially if it is located near the dwelling.

The power does not exceed a few l / s, respectively, the generator is enough for lighting, maintaining the heating boiler pump and charging for a mobile phone. With a light load, it can work for a couple of hours.

Motor from a wheeled lawn mower

Such units are not very common with us, but you can find a suitable instance of a motor from a broken unit.
Power reaches 3-5 l / s, this is already an application for good nutrition for country house. You can even turn on a small refrigerator. Four-stroke models come across. This allows you to save fuel, get a more environmentally friendly exhaust, and there is less noise from such engines. Maintenance is more complicated, however, this fact is offset by high reliability, and the ability to work 4-6 hours under load.

Engine from a moped (motorcycle)

The moped motor is suitable for medium power generators. Depending on the model, you can remove the power of 2-3 kW.

An engine from a motorcycle (such as Java or IZH) is generally a godsend for a generator.
A power of more than 25 l / s allows you to safely connect a 5 kW generating set. This is a complete power source for a private home. If you also use the gearbox, you get a relatively economical installation. Running the generator will allow you to find out at what speed power is generated with an effective load.

The main advantage of such motors is ease of maintenance and the ability to work for a long time. Perhaps the most affordable (in terms of search) option.

Important! When using such motors, forced ventilation must be provided.

Otherwise, the cylinders may overheat. Engines for mopeds and motorcycles are designed for operation in the oncoming air flow.

Don't let this sound like an overly ambitious idea. Finding an engine from Moskvich or Zaporozhets in the car market is not difficult. The cost is cheap, you can buy two at once, for spare parts.

Such units are repaired with electrical tape and pliers. If dear reader of a different opinion - for you given material not a guide to action, but just interesting information.
Converting such a motor into a drive for a gas generator with your own hands is not difficult. Set on a solid foundation, move the accelerator and clutch pedal to manual drive, and even a gearbox can be used.

The main advantage is a virtually unlimited period of work. The cooling of the motor from ZAZ is air, it blows on itself. You do not even have to connect the electric starter for the gas generator with your own hands, the engine simply starts with the key from the standard starting system.

The power of 30-40 l / s allows you to assemble a generator of 10 kW. True, it will be more of a stationary than a mobile option.

How to make a gas generator with a ready-made power plant?

The answer lies on the surface - connect the generator to a gasoline engine. Where to get it? Any electric motor proper organization winding excitation system, becomes a generator.

There are two ways to create homemade generators:

It receives torque from your car's engine and produces 14 volts DC.
You don't have to invent anything. It is enough to look at the power characteristics, and choose a small engine from those listed above.

The main condition is a working voltage regulator and preferably "live" windings. However, if you got a burnt copy - it does not matter. Any radio amateur knows how to remove the anchor from the electrical installation of a gas generator.

You can rewind the winding in one evening. In principle, if you can assemble a mini power plant on your own, you can sit down to write a book: "Faults in the gas generator and how to fix them." This is an extremely rewarding experience.

The breakdown of the power source in the open field is a problem. And someone familiar with the Kulibin device will be able to restore work without calling the wizard.
The only drawback, however, is significant - the voltage is 12-14 volts. Lighting, charging mobile devices, connecting music and a computer - no problem. But for the house you need 220 volts. A voltage converter will help out, for example, from an old uninterruptible power supply.

Here the situation is more complicated (albeit cheaper, there is no need to look for a converter). Any electric motor can be made a generator by connecting it to the drive.
There are nuances. To excite the windings in generator mode, a capacitor circuit is required (see figure) and an accurate selection of revolutions.
If you have read up to this point, it makes no sense to explain how to get one phase of 220V from a 3-phase 380V source. This is the topic of a separate article.

You need a tachometer to measure RPM. You connect the motor to the network, and measure the speed of rotation. Add 5% -10% to the received revolutions, and you get the optimal shaft rotation speed to excite the generator windings.

Homemade 220 volt gas generator from a GAZ 21 engine and a 15 kW alternator - video

Conclusion:

It is possible to collect an autonomous energy source. And with some effort - almost free.

obinstrumente.ru

Do-it-yourself generator for 220 volts. Now blackouts are not terrible / Sudo Null IT News

Required:

- a collector motor, you can use another 12 volt one - a nozzle on the motor axis - a drill chuck - an uninterruptible UPS or an inverter from 12 to 220 - a 10 amp diode: D214, D242, D215, D232, KD203, etc. - wires - bike - and preferably a 12 volt battery

Assembly:

- we fix the bike so that the rear wheel spins freely, we hang it out - we fasten the cartridge to the motor axis - we fasten the motor so that the cartridge is pressed tightly against the wheel, you can tighten it with a spring - we connect the motor to the battery: the negative wire of the motor to the negative of the battery, the positive wire of the motor to the anode of the diode, the cathode of the diode to the plus of the battery - we connect the battery to the uninterruptible power supply or to the inverter That's it! You can connect consumers to 220 volts to an uninterruptible power supply and use electricity! As soon as the battery is discharged, it will be enough to pedal and in about an hour the battery will be charged.

Where to get details?

- the motor can be bought in a car shop: cooling fan motor. It is not expensive. And if you want almost for nothing, then it can be twisted at the metal collection point, from an old car. - an uninterruptible power supply from a personal PC, you can use an old one with a worthless internal battery. Or an inverter 12 - 220, sold in automotive stores. - a 10 amp diode, for example: D305, D214, D242, D243, D245, D215, D232, D246, D203, D233, KD210, KD203, etc. Sold in radio spare parts stores. Or you can unscrew it from old technology.

My experience:

www.habr.com

Do-it-yourself generator for 220 volts. Complete autonomy from power lines! | SvetVmir.ru

I will show you how to assemble a simple, but powerful enough, 220 volt generator.

Required:

A collector motor, you can have another 12 volt attachment - a nozzle on the motor axis - a cartridge from a drill - an uninterruptible UPS or an inverter from 12 to 220 - a 10 amp diode: D214, D242, D215, D232, KD203, etc. - wires - bicycle - and preferably a 12 volt battery

Assembly:

We fix the bike so that the rear wheel spins freely, we hang it out - we fasten the cartridge to the motor axis - we fasten the motor so that the cartridge is pressed tightly against the wheel, you can tighten it with a spring - we connect the motor to the battery: the negative wire of the motor to the battery negative, positive motor wire to diode anode, diode cathode to plus battery - battery we connect with an uninterruptible power supply or with an inverterEverything! You can connect consumers to 220 volts to an uninterruptible power supply and use electricity! As soon as the battery is discharged, it will be enough to pedal and in about an hour the battery will be charged.

Where to get details?

The motor can be bought at a car shop: cooling fan motor. It is not expensive. And if you want almost for nothing, then you can twist it at the metal collection point, from an old car - an uninterruptible power supply from a personal PC, you can use an old one with a worthless internal battery. Or an inverter 12 - 220, sold in automotive stores. - 10 amp diode, for example: D305, D214, D242, D243, D245, D215, D232, D246, D203, D233, KD210, KD203, etc. Sold in stores radio parts. Or you can unscrew it from the old technology.

My experience:

I've been using this generator for a few months now and it showed pretty good results! The charging current of the battery was about 10 amps and depended on how you pedal. If you twist slowly, it turned out 5 amperes, if you twist as quickly as possible, then 20 amperes. The average generator power is 120 watts. Mainly used by consumers low power:

3 W - phone charging - 5 W - radio receiver - 7 W - charging and using a tablet - 10 W - charging camera, flashlight and video camera - 12 W - energy-saving light bulb - 30 W - music center - 40 W - laptop - 70 W - TV (rarely turned on)

I had enough charge for almost a day, after which I pedaled for an hour and again it was possible to use electricity.

If anyone knows other methods for generating electricity at home, share in the comments.

svetvmir.ru

Do-it-yourself gas generator at home: video and details

Situations with power outages or the absence of a mains supply make you think about a backup power source. Good decision problems - buy or make a gas generator with your own hands.

Among all existing generators, gasoline is in the first place in popularity.

Why are they good?

• Easy to operate;
• Compact and mobile;
• Have high performance;
• Easily repaired;
• Cheaper than diesel generators.

Gasoline generators are used during emergency shutdowns as a replacement for the current source. They help out the owners of dachas, construction sites where energy has not yet been supplied, provide a decent life for geologists, rangers, reindeer herders, drillers - everyone who is forced to work in hard-to-reach areas. A good helper for home craftsmen in the country or in the garage. They make it possible to replace manual labor with mechanized labor even where the use of electricity is not available. Lighting, electrical appliances and tools, household appliances are connected through the generator.

When connecting devices, pay attention to the allowable voltage - if the generator is designed for 127 Volts, then devices made for 220 Volts will not be able to work with the declared power.

The time of uninterrupted operation of the gas generator depends on the power of the device, the volume of the fuel tank, and the load. There are models that can provide work under load up to one and a half thousand hours.

Device

The principle of operation of a gasoline generator is based on the conversion of energy obtained from the combustion of gasoline into electrical energy. Components of a gas generator:

• Gas engine;
• Electric motor 127, 220 or 380 V;
• Fuel tank;
• starting starter;
• Capacitors;
• Electrical machines and switches;
• Voltmeter;
• Sockets for connecting electrical appliances.

Industrial models are equipped with additional features, allowing you to control all the parameters of the work. Particularly convenient is ATS (automatic input of backup power to emergency situations). The whole device is mounted on a convenient rigid frame, equipped with wheels and handles for transportation. The factory casing is much more beautiful and stronger than a homemade one. Below is a drawing showing all the details of a gasoline generator.

For those who are well versed in electrical engineering and know how to work with their hands, making a gas generator with their own hands will not be difficult.

Where to begin?

Based on the magnitude of the required loads for the simultaneous inclusion of devices, all the main elements are selected.

Optimum performance values ​​are achieved the right choice power of gasoline and electric engines.

To obtain a single-phase current of 220 V, a two-stroke gasoline engine is suitable, and if you plan to receive higher powers, then the choice should be stopped at a four-stroke one. Fuel consumption will depend on the selected engine. In addition to the main task - energy generation, a system for noise reduction, lubrication, ventilation, and the installation of an exhaust pipe for exhaust gases should be provided. You will have to buy wheels to ensure the mobility of the device. The casing can be made of metal or plywood.

Gasoline generator based on a two-stroke gasoline engine will help out if you need a short-term connection. When you need to work for a long time and with a heavy load, it is better to make a generator with a four-stroke gasoline engine.

The control panel must have a voltmeter, a circuit breaker button, grounding terminals, sockets for using the generated energy.

Study self-manufacturing a gas generator makes sense when you have unused engines from old appliances. You can, of course, buy all the components specifically for these purposes, but you won’t be able to get big savings - the cost of components may even exceed the price of a finished factory model.

In practice, motorcycle or automobile engines, engines from mowers, chainsaws and other devices are often used.

Generator with engine from car Volga 21

The simplest gas generator

As an example, let's analyze the simplest home-made design based on a chainsaw and electric motor from the old washing machine:

1. We attach the electric motor from the washing machine to the chainsaw tire using a specially made stable bracket.
2. We put pulleys on the drive shafts of both engines and connect them using a belt drive.
3. The button for adjusting the speed of the chainsaw engine, located on the handle, is equipped with an additional device for adjusting the pressing force. A simple bolt secured with a yoke will do the job just fine. To increase the speed, it will be enough to twist it, and to reduce it, loosen it.
4. We connect two capacitors in parallel to the external starting winding of the electric motor, designed for a power of 400-450 Volts.

The video shows a generator with an engine from a washing machine

This installation, the simplest in its design, is capable of delivering a current of 220 V 180 A, which is enough to power a drill, screwdriver, and lighting fixtures.

Such an elementary device can be made by almost any master. Of course, except for cases when a person does not see the difference between an engine and a carburetor, or the words bracket and container sound the same for him. It is completely unacceptable to manufacture electrical appliances for a person who does not know the differences between the concepts of power (watts), current strength (amperes) and circuit voltage (volts). More complex structures require fundamental knowledge and skills that will help to correctly calculate the power of engines, ensure safe use finished design, correctly configure all parameters.

On the Internet, on forums, masters discuss different homemade designs. For those wishing to join the ranks of the Samodelkins, participating in discussions will bring many benefits - you can get a lot useful tips on the device of a new one or the repair of an old one. Visually see the manufacturing process will help special videos. Which muffler to choose, electric starter, whether it is possible to make an autorun function - all questions of interest can be answered. Would you like to go further and put a wind turbine on the site to save electricity? What current is needed at the output - 12 or 16 A? There are enough instructions on any topic, study and apply the best of them in practice.

Those who decide to make a gas generator with their own hands need to correctly assess their capabilities. Unsuccessful attempts can cause damage to household appliances or even become a threat to life.

The video shows another do-it-yourself generator, let's see

Work with electrical devices makes high demands on safety and does not forgive negligence. Be very careful and careful!

Pros and cons of a homemade unit

• The ability to "extend the life" of old motors;
• If repairs are needed, there will be no difficulties - you know every screw of the structure;
• Increasing self-esteem - a well-made functional device will become your pride;
• Possibility to use as power during welding;
• Saving money, replacing manual labor with a more progressive one.

1. The complexity of the process, many operations require special tools and facilities.
2. In the manufacture of devices at home, many of the functions that are present in industrial designs are omitted.
3. If there are no old parts in stock, then buying new ones in stores can be too expensive.
4. There is no possibility of connecting ATS (automatic input of the reserve).

A homemade gas generator can be a good alternative to factory models in cases where there is not enough money to buy or the need for its use occurs infrequently. For permanent and regular use, it is better to purchase a ready-made gas generator for 220 or 380 Volts with a factory warranty. Unless, of course, the alteration of various devices and devices is not your favorite pastime. And it is desirable that you have the skills various works– it will require a lot of manual operations, welding and installation work.

generatorexperts.ru

DIY 220 volt generator

Ecology of consumption. I used this generator for several months and it showed quite good results! The charging current of the battery was about 10 amps and depended on how you pedal.

Generator - 220 volts with your own hands! We need .- a collector motor, you can use another 12 volt one - a nozzle on the motor axis - a drill chuck - an uninterruptible UPS or an inverter from 12 to 220 - a 10 amp diode: D214, D242, D215, D232, KD203, etc. - wires - a bicycle - and preferably a 12 volt battery

We fix the bike so that the rear wheel spins freely, we hang it out - we fasten the cartridge to the motor axis - we fasten the motor so that the cartridge is pressed tightly against the wheel, you can tighten it with a spring - we connect the motor to the battery: the negative wire of the motor to the negative of the battery, positive motor wire to the anode of the diode, the cathode of the diode to the plus of the battery - we connect the battery to an uninterruptible power supply or to an inverter That's it! You can connect consumers to 220 volts to an uninterruptible power supply and use electricity! As soon as the battery is discharged, it will be enough to pedal and in about an hour the battery will be charged.

Where to get details?

The motor can be bought at a car shop: cooling fan motor. It is not expensive. And if you want almost for nothing, then it can be twisted at the metal collection point, from an old car. - an uninterruptible power supply from a personal PC, you can use an old one with a worthless internal battery. Or an inverter 12 - 220, sold in automotive stores. - a 10 amp diode, for example: D305, D214, D242, D243, D245, D215, D232, D246, D203, D233, KD210, KD203, etc. Sold in radio spare parts stores. Or you can unscrew it from the old technology.

My experience:

I've been using this generator for a few months now and it showed pretty good results! The charging current of the battery was about 10 amps and depended on how you pedal. If you twist slowly, it turned out 5 amperes, if you twist as quickly as possible, then 20 amperes. The average generator power is 120 watts. I mainly used low power consumers:

3 W - phone charging - 5 W - radio receiver - 7 W - charging and using a tablet - 10 W - camera, flashlight and video camera charger - 12 W - energy-saving light bulb - 30 W - music center - 40 W - laptop - 70 W - TV (rarely turned on)

I had enough charge for almost a day, after which I pedaled for an hour and again it was possible to use electricity. published by econet.ru

P.S. And remember, just by changing your consumption, we are changing the world together! © econet

I found an article on the Internet on how to convert a car generator to a permanent magnet generator. Is it possible to use this principle and remake the generator with your own hands from an asynchronous electric motor? It is possible that there will be large energy losses, not such an arrangement of coils.

I have an asynchronous type motor for a voltage of 110 volts, revolutions - 1450, 2.2 amperes, single-phase. With the help of containers, I do not undertake to make a home-made generator, as there will be large losses.

It is proposed to use simple engines according to this scheme.

If you change the engine or generator with rounded magnets from the speakers, then you need to install them in crabs? Crabs are two metal parts, anchored outside the excitation coils.

If magnets are put on the shaft, then the shaft will shunt the magnetic lines of force. How then will the excitement be? The coil is also located on a metal shaft.

If you change the connection of the windings and make a parallel connection, accelerate to a speed above normal values, then you get 70 volts. Where can I get a mechanism for such revolutions? If you rewind it to a decrease in speed and lower power, then the power will drop too much.

An induction motor with a closed rotor is iron, which is filled with aluminum. You can take a homemade generator from a car, which has a voltage of 14 volts, a current of 80 amperes. This is good data. An engine with an alternating current collector from a vacuum cleaner or washing machine can be used for a generator. Install bias on the stator, remove the DC voltage from the brushes. According to the highest EMF, change the angle of the brushes. The efficiency tends to zero. But, better than a synchronous type generator, they did not invent.

I decided to try a homemade generator. A single-phase asynchronous motor from a baby washer twisted with a drill. I connected a capacitance of 4 microfarads to it, it turned out 5 volts 30 hertz and a current of 1.5 milliamps for a short circuit.

Not every electric motor can be used as a generator in this way. There are motors with a steel rotor that have a low degree of magnetization on the remainder.

It is necessary to know the difference between electrical energy conversion and energy generation. There are several ways to convert 1 phase to 3. One of them is mechanical energy. If the power plant is disconnected from the socket, then all conversion is lost.

It is clear where the movement of the wire with an increase in speed comes from. Where the magnetic field will be to obtain the EMF in the wire is not clear.

It's easy to explain. Due to the mechanism of magnetism that remains, an EMF is formed in the armature. There is a current in the stator winding, which is closed to the capacitance.

The current has arisen, which means that it gives an increase in the electromotive force on the coils of the rotor shaft. The emerging current gives an increase in the electromotive force. The stator electric current generates much more electromotive force. This goes until the equilibrium of the stator magnetic fluxes and the rotor is established, as well as additional losses.

The size of the capacitors is calculated so that the voltage at the terminals reaches the nominal value. If it is small, then reduce the capacity, then increase it. There were doubts about the old motors, which supposedly are not excited. After accelerating the rotor of a motor or generator, it is necessary to poke quickly into any phase with a small amount of volts. Everything will return to normal. Charge the capacitor to a voltage equal to half the capacitance. Turn on with a three-pole switch. This applies to a 3-phase motor. Such a scheme is used for generators of passenger transport cars, since they have a squirrel-cage rotor.

Method 2

You can make a homemade generator in another way. The stator has a tricky design (has a special design solution), it is possible to adjust the output voltage. I made a generator of this kind with my own hands at the construction site. The engine took a power of 7 kW at 900 rpm. I connected the excitation winding according to the triangle circuit for 220 V. I started it at 1600 revolutions, the capacitors were 3 at 120 microfarads. They were switched on by a contactor with three poles. The generator acted as a three-phase rectifier. From this rectifier, an electric drill with a 1000-watt collector was fed, and a circular saw for 2200 watts, 220 V, grinder 2000 watts.

I had to make a soft start system, another resistor with a shorted phase after 3 seconds.

For motors with manifolds, this is not correct. If the rotating frequency is doubled, then the capacitance will also decrease.

The frequency will also increase. The tank circuit was switched off in automatic mode so as not to use the reactivity torus, not to consume fuel.

During operation, it is necessary to press the stator of the contactor. Three phases dismantled them out of uselessness. The reason lies in the high gap and increased field dissipation of the poles.

Special mechanisms with a double cage for squirrels and slanting eyes for squirrels. Still, I received 100 volts and a frequency of 30 hertz from the washing machine motor, the 15-watt lamp does not want to burn. Very weak power. It is necessary to take the motor stronger, or put more capacitors.

Under the wagons, a generator with a squirrel-cage rotor is used. Its mechanism comes from a gearbox and a belt drive. Turns of rotation 300 turns. It is located as an additional load generator.

Method 3

You can design a homemade generator, a gasoline power plant.

Instead of a generator, use a 1.5 kW 3-phase asynchronous motor at 900 rpm. The electric motor is Italian, it can be connected with a triangle and a star. First, I put the motor on a base with a DC motor, connected it to the coupling. Started turning the engine at 1100 rpm. There was a voltage of 250 volts on the phases. I connected a 1000 watt light bulb, the voltage immediately dropped to 150 volts. It's probably due to phase imbalance. Each phase must be connected to a separate load. Three light bulbs of 300 watts will not be able to reduce the voltage to 200 volts, theoretically. You can put more capacitor.

The engine speed must be increased, do not reduce under load, then the power supply to the network will be constant.

Significant power is needed, the autogenerator will not give such power. If you rewind a large KAMAZ one, then 220 V will not come out of it, since the magnetic circuit will be oversaturated. It was designed for 24 volts.

Today I was going to try to connect the load through a 3-phase power supply (rectifier). The lights were turned off in the garages, it didn't work. In the city of power engineers, the electricity is systematically turned off, so it is necessary to make a source of constant power supply with electricity. For electric welding there is a hitch, it is hooked to the tractor. To connect an electric tool, you need a constant voltage source of 220 V. There was an idea to design a home-made generator with your own hands, and an inverter to it, but you can’t work on batteries for a long time.

The electricity was recently turned on. I connected an asynchronous motor from Italy. I put it with the chainsaw motor on the frame, twisted the shafts together, put a rubber clutch. I connected the coils according to the star scheme, the capacitors in a triangle, 15 microfarads each. When I started the motors, the power output did not work. I attached a capacitor charged to the phases, the voltage appeared. The engine gave out its power of 1.5 kW. At the same time, the supply voltage dropped to 240 volts, at idle it was 255 volts. The grinder from him worked fine at 950 watts.

I tried to increase the engine speed, but the excitation does not work. After the contact of the capacitor with the phase, the voltage appears immediately. I will try to install another engine.

What system designs are produced abroad for power plants? On 1-phase, it is clear that the rotor owns the winding, there is no phase imbalance, because there is one phase. In 3-phase, there is a system that gives power adjustment when motors with the highest load are connected to it. You can also connect an inverter for welding.

Over the weekend I wanted to make a homemade generator with my own hands with an asynchronous motor connected. A successful attempt to make a home-made generator turned out to be the connection of an old engine with a cast iron housing for 1 kW and 950 rpm. The motor is excited normally, with one capacitance of 40 uF. And I installed three containers and connected them with a star. This was enough to start an electric drill, a grinder. I wanted to get the output of voltage on one phase. To do this, I connected three diodes, a half-bridge. The fluorescent lamps for lighting burned out, and the bags in the garage burned out. I will wind the transformer in three phases.

Write comments, additions to the article, maybe I missed something. Take a look at , I will be glad if you find something else useful on mine.