Mechanical converter 12 - 220 V

Hi all! We will talk about how to make a completely mechanical converter from 12 V DC to 220 V AC. The converter power is 50 W, the output signal shape is pure sine. In fact, the entire installation consists of an electric motor and a mini generator.

Will need

Electric motor 775 series - Ali Express.
Three-phase brushless mini generator - Ali Express.
Two pulleys and a belt - Ali Express.
Rechargeable battery 12 V.
Socket.

Making a converter yourself

We take the 775 series engine. It has a 12V supply and consumes up to 7.5A

We take the pulley.

We put the pulley on the engine and tighten it with the special wrench included in the kit.

We put the pulley on the mini electric generator.

A wooden plank will be used as the base of the transducer.

We place the engine and generator on it parallel to each other.

We put on the belt and note the distance that needs to be maintained between the generator and the motor in order for the belt to be tensioned.

We fix the engine with metal brackets. Holes for self-tapping screws were previously made in the board.

We fix the generator and put the belt on the pulleys.

We screw the socket. There are three wires coming out of the generator. We connect any two to the block, one will not be used.

Install the battery.

We connect to the engine via a switch.

We glue the switch itself to the battery with hot glue.

View of the finished voltage converter.

Tests

Turn on the device. The noise of the engine is heard.
Although the brushless generator produces a total power of 50 W, this is enough to light a 40 W lamp in one phase.

It can handle an LED lamp just fine.

You can charge your phone without difficulty.

The big advantage of this design is that the converter produces a three-phase voltage with a frequency of approximately 50 Hz with an absolutely pure sine wave. Perhaps this may be useful to you somewhere.

Watch the video

Watch the video on how the converter works.

come back

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Comments (24)

#1 ralexsandr Guests 24 June 2018 13:33
3

What's the point in all this?
- Answer
1. #2 anvar aminov Guests 2 July 2018 14:23
  0
  
  for children's educational leisure.....or a toy for a retired electrician
  
  Answer
#3 Vyacheslav Guests 24 June 2018 13:34
9

you also need to install a 12 volt converter, then the battery will be charged
- Answer
#4 220 volt Guests 24 June 2018 14:03
2

I’ve assembled it and am pleased, one of the most reliable converters for half a kilowatt!
- Answer
#5 T00L Guests 24 June 2018 15:39
0

This arrangement of the generator and the engine is generally called parallel
- Answer
#6 Tula Tokarev Guests 24 June 2018 16:21
1

For a circle Young Technician- the very IT!! Visual WORKING layout example. So AUTHOR +++ 100500
- Answer
1. #7 anvar aminov Guests 2 July 2018 14:11
  1
  
  absolutely right.....it’s very suitable for children’s general outlook in youth creativity circles, it will be interesting and visual for them
  
  Answer
#8 Guest Andrey Guests 24 June 2018 19:35
0

Poor efficiency. Engines can be directly connected
And still poor efficiency.
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1. #9 Tula Tokarev Guests 25 June 2018 23:07
  0
  
  Belt drive - very COMPLETE - in case of any VARIATIONS - different PAIR - engine-generator, or...
  This is a very common model, and even in production a similar SCHEME works. And it is applied. Despite the low efficiency - about 60-65%
  
  Answer
#10 Guest Alex Guests 24 June 2018 20:15
0

I wonder what the efficiency is
- Answer
1. #11 Brother Anon Guests June 27, 2018 08:41
  2
  
  The efficiency is very low. For small engines, the efficiency does not exceed 70%. There are TWO of them. Plus the losses on the belt drive are 3-5% (if it is well tensioned and fresh, and if it is weak and stretched, then all of 10-15%). It is also worth considering the power theorem. The best result is when the generator power matches the consumer power and the generator load level is 50% (therefore, real turbines are always loaded at 30-40%).Judging by the size of the engine - one comrade in the comments - openly whistled about 500 W. At best 15-20 W.
  
  Answer
  1. #12 Tula Tokarev Guests 27 June 2018 15:53
    0
    
    Brother Anon- well, you got to the bottom of AUTHOR7, his idea is normal. Well, really, it’s not very efficient. I’M A MY OWN MODEL. - and I want to share my joy. I did NOT invent the Nuclear Power Plant.....Or..?? What ?
    
    Answer
#13 Mikhail Karpenko Guests June 25, 2018 09:34
1

this principle is very widely used when you need to “get rid” of network interference and interference
- Answer
#14 Guest Victor Guests June 25, 2018 09:53
4

Judging by the fact that the person is holding the light bulb with his hand, the power is low.
But the meaning of the device is not clear. It’s easier to charge your phone using a car battery charger and use a 12-volt LED light bulb.
- Answer
1. #15 My name Guests June 25, 2018 10:31
  1
  
  It is clear. But... there is one "but". Our country is powerful to the point of darkness, isn’t it? What's going on in this greatness, huh? That's the same... Well, how about tomorrow, just for a day or two, the lithicity will disappear? Well, or something else? Assembling converters is too wise, but this... well, unless a complete idiot can handle it. Well, what's wrong? As easy as pie. It lies on the surface, but not everyone was able to figure it out. No, well, if you are an oligarch or a relative of one, then of course... What am I doing? I'm nothing. And so... please!
  
  Answer
  1. #16 Guest Victor Guests June 26, 2018 10:17
    0
    
    Please note that this homemade product is from a foreigner))
    Almost every person has a car; the battery can be borrowed temporarily. Get power from a screwdriver. I bought myself a power bank with a flashlight for 1000 rubles and a capacity of 4 Ah.
    
    Answer
  2. #17 Electron Guests 8 July 2018 17:05
    1
    
    Well, how about tomorrow, just for a day or two, the lithicity will disappear? Well, or something else?...
    -
    What capacity do you need to have a battery to use it for 2 days? Isn't it better to connect LEDs to the battery?
    
    Answer
#18 Alexander. Guests 19 July 2018 17:05
1

You keep laughing, but in vain. MGTS installed my router for me just now, and it works on 220 Volts. What if there is war, God forbid! The power plant was bombed! Then you can’t call anyone (the phone is connected through this router) or go on the Internet to see who’s beating whom, in general it’s a complete mess. And here - the motors are spinning, the 220V electricity is moving, and you are sitting, smoking and chatting on the phone or looking at naked girls on the Internet...
- Answer
1. #19 a lion Guests 11 April 2019 13:43
  2
  
  During the war there will be no telephone or internet!!!
  
  Answer