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.