Homemade Power Station

I am a military pensioner and live in the country almost all spring, summer and autumn until the heating season. I have a small plot and a house up to 80 sq.m. On the site, I installed a greenhouse of about 100 sq.m. No electricity was supplied to our holiday village and therefore all who live on their plots (about 78 families) use all kinds of means of generating electricity on their own. The cost of the project for the power supply is about 15,000 hryvnias for each owner of the site, not including contributions for the installation of poles, etc. Gas supply costs even more, so no one lives in the village in the autumn-winter period. In the spring when people come, you can miss the tool, etc. - looters do not sleep.

I found a boiler on the Internet and it seemed to me very good and very economical at the same time "omnivorous", which is also very good. What is the request (probably a plea). It is necessary to provide for the installation of your boiler, and it is better to install a steam turbine and a stabilization and automation system for the production of at least 10 kW / h of alternating (preferably three-phase) voltage of 230V. For possible use both for connecting a fan and lighting, watering, etc.There are many developments on the Internet, but there is not a single prof. solutions, I was told that the Chinese produce mini thermal power plants for remote areas, but no one knows where to buy it. If you agree to produce this miracle 3 in one: your heat, your electricity, plus the disposal of solid waste from wood processing and other low-calorie fuels.

VladislavUnfortunately, we do not manufacture boilers. We have a purely educational site. The described design of a self-made electric generator is assembled by the author of the article, but it is not his invention. It’s just that for several years now such an electric generator has been used by the author in a country house, and he, at the request of the site administration, shared his experience, described his device. By order, he does not collect them. But we can try to help you with useful information. Look, maybe a furnace with a thermogenerator will suit your case. The maximum power of the connected electrical appliances is small there, but it must be enough to provide vital energy needs. General review - How to "weld" electricity on a gas stove. Concrete Industrial Design - Wood-burning electric generator "Indigirka".

You have written that you need to use a three-phase transformer to power a single-phase instrument. How to connect the windings of a three phase transformer to get one phase?

Evgeny, for this you can use a special transformer that converts a three-phase network into a single-phase. Look on the Internet, there is a lot of information about them.

It was the searches on the Internet that led me to your article on a special transformer that converts three phases into one. Many have heard of him and say there are even somewhere people who saw him. But in classical electrical engineering, it is impossible to assemble three voltage shifted by 120 degrees into one, using only a transformer. There was an idea using a powerful three-phase trans to assemble three phases into one and use it for heavy loads (single-phase welding), so as not to strain the neighbors. But alas. If you can share the winding connection diagram, I will be very grateful.

Eugene, the independent creation of a transformer that converts a three-phase voltage into a single-phase is a rather complicated matter. No wonder prices for such industrial transformers (TST, 3UI Block, etc.) from $ 1,000.

As I was on a farm, I lived with light for a week, without it :)
On January 1 in the evening, electricity suddenly disappeared (there was freezing rain). Immediately overpowered by horror! A farm at the end of the world, roads visible, one candle for the whole house. I am an electrician by profession, but what's the point? To go to bed early, and there is still no 18 pm, I began to think. In the car, naturally there is a battery, but did not start for a week, apparently hooked. Dragged into the room (the benefit of a headlamp is available). I measured it with a tester-12.4 volts showed that there’s a chance. He brought an auto-carrying, connected it, it glows pretty well, but without a radio and a phone, life didn’t become easier :) There are naturally receivers in the house, but all without batteries (I didn’t think of that). The phone has a radio, but the battery is at the finish, and it needs 7-8 volts to charge. From battery? It will burn of course. (There is no auto charge). And then the idea came! I take off the battery, with the help of a model gum I tie two wires, and connect it in series with the carrier (we observe the polarity). And happiness came, and the light shines (the truth is in the floor), and exactly 7 volts comes to the battery. An hour later, the lamp shone with might and main, and the radio worked. There was no electricity for a week, but I was not very worried, the car started up without difficulty, 10 minutes and there is enough battery for a day. There is no need to buy expensive generators and spend money on gas in order to watch a telly or sit at a computer.Of course, of course, this is only for villages, and who has electric heating, an electricity business, this trick will not work :)

Hello!

I want to clarify, Asynchronous motor operates due to a rotating magnetic field that is generated from the current of a 3-phase network in the motor stator. This magnetic field begins to rotate the rotor (the rotor is like a piece of metal filled with aluminum).
This is how the engine works. And does it generate as electric power if there is no magnetic field (the rotor is not a carrier of the magnetic field)?

Or am I mistaken in something, then please correct me and explain what is wrong.

I read Wikipedia :)
For an asynchronous machine to operate in generator mode, a reactive power source that creates a magnetic field is required. In the absence of an initial magnetic field in the stator winding, the flux is created using permanent magnets, or under active load due to the residual induction of the machine and capacitors connected in parallel to the phases of the stator winding.

It turns out that this only works due to the residual magnetization of the rotor? (well, the fact that we rotate the engine faster, we make negative slip)

Wow. The news about the trance from 3 to 1 phase was especially pleased, I almost broke my stomach. As an option, I can advise a three-phase rectifier paired with an inverter from constant to variable minus that the efficiency will drop with every extra link in such circuits. About asynchronous identity was fun. By the way, you can use a generator as a generator, a great idea, is it not, for example, a car generator, or two paired with the same inverter, or who has oil in your head, you can remake the car generator to 220 V.

Very relevant article.
My house is heated by an electric boiler with a capacity of 24 kilowatts at 380 volts
I constantly use 8 ... 12 kilowatts - the volume of the heated room is 300 cubic meters.
And I want to have a power source in case of an emergency power outage. So please post more detailed information.
Video of a really working generator
Circuit diagram, etc. etc.
Regards, Yuri

What kind of electric engine is needed to get 3x10 kW and how many horses of a gas engine are enough for such a device?

Hello everyone, I want to share my experience in manufacturing a generator from an induction motor. There was an ud-2 engine and an electric motor of 4 kW 1500 (1440) rpm. Welded the frame, picked up the pulleys on el.dv. twice as much as on ICEs, since the ud-2 stably works at high speeds (in the future I plan to force it to eat a lot more), the conders are in a triangle pattern of 32 microfarads per shoulder, according to the latest tests, when the lights were turned off, it worked for about four and a half hours, generator heating was not significant - with a hand to the touch less than 40 degrees. I started dvigun on benz, then switched to natural (main) gas, measured gas consumption: 1.46 cubic / hour. I couldn’t say exactly what the load was, but I had to turn off the boiler - I started to slip the belt (it’s not very narrow in size, I’ll buy the one I need from later on), and there were two TV sets, six light bulbs, a laptop, a computer, and a printer for printing , a circulation pump in the heating, an electric fireplace of 0.5 kW, and two bulbs in the garage, two in the yard. the span was in the range of 206 to 241 volts. there is no frequency meter so I can not say about the frequency.
In general, it turned out cheaply and angrily, the power tool works with a bang - the 1.8 kW grinder is sawing quietly, the drill, respectively, too, the battery charger for Akum also works, next time I will try the irrigation pump, a three-phase 0.6 kW compressor works fine. so, in a word try, watch the video in the internet, read the forums and you will succeed! all infa on the generator from the Internet - selection of capacitors, generator speed, etc.

I understand I took the engine switched to gas. But how did you solve the problem of lubricating the engine if you switch it to gas, then you need to lubricate somehow or I'm wrong. Because, as far as I understand, almost all four-truck engines require piston lubrication, that is, almost all engines are lubricated by the fact that oil is added to gasoline. But how to add it to gas?

Alexander,
To gasoline four stroke engines no oil added, oil is poured into the crankcase. And in push pull - gasoline with oil. Or even simpler: where there is a valve - a four-stroke, no valves - a two-stroke.

Guys may not pull an owl on the globe.
What is the transformer that converts THREE !!!! phases in ONE.
Where have you seen or heard this? And the main question is WHY? A three-phase asynchronous generator is essentially three single-phase transformers with 220 volts at the output, when the windings are connected to a star (Upit 220/380 V). You just need to scatter different phases into different consumers and that’s it. For whom is higher mathematics we take an engine with one winding, and we have one output for 220 volts at the output. You can try using engines from washing machines, or just buy a single-phase asynchronous, because now there is a large selection of them. I personally have an Airov engine of 1.5 kW / 1500, in case of interruptions with the electrician it copes with its task with a bang, a diesel motoblock of 6 horses.

It is ridiculous and sad to read the advice of "experts" on the "conversion" of 380 volts to 220 volts! Have you ever held a soldering iron in your hands? And if not, read books on the topic "Young Electrician"!

Three trance can be connected in each phase, and the output windings can be paralleled.

Where and how will you excite the rotor magnetic field ?! What ethers? !!! This idea has repeatedly justified its NOT COMPATIBILITY !!!! The only option is two asynchronous with a phase rotor on a single shaft,
At the first stage, we disconnect the triangle into the series connection of the stator windings and feed there a single-phase change to 220v, we connect the rotors of both motors. From the stator of the second motor we get 3 phases !!!
If you need a valuable stabilizer and it is precisely at 50 Hz three-phase - we supply the rectified voltage to the stator of the first motor !!!! Then from the stator of the second motor we get 3 phases of 380v and 50Hz !!!! Naturally, if the shaft will rotate with n = 3000 rpm !!!!

But it is not easier to connect the windings into a triangle, you will have 220v at the output! Invent a bike here!