How to make a small electric generator from a Segway and a trimmer motor

Away from cities where the power supply is unstable or non-existent, a small power generator is often needed. We'll tell you how to assemble it yourself.
Such a device, of course, will be inferior in all respects to industrially manufactured generators. Nevertheless, it can successfully serve as a low-power backup power source.

Detailed description of generator manufacturing

For the generator we need a small synchronous electric motor. Suitable ones are installed in Segways and electric scooters.

Let's remove the wheel in which the engine is located, which will subsequently serve as a generator.

Unscrew the 6 bolts of the top cover and use a large screwdriver to “disassemble” the wheel.

Using an adjustable wrench, forcefully remove the engine from the flywheel. We need to secure the sprocket to the back of the flywheel. Let's make holes and glue the nuts on the outside.
Do not allow small objects or metal filings to stick to the flywheel magnets.

Insert the bolts and tighten with the same nuts from the inside. Let's remove the control circuit: it will no longer be needed. Put the engine back in place and close the cover.

We will use a lawnmower gasoline engine as a drive.

Let's connect the shaft to the coupling.

Install a small sprocket on the end of the shaft.

We will make the base from two aluminum profiles, to which we will screw a metal plate to such a height that the generator sprocket rotates freely.

Let's fix the generator on the plate.

Let's put on the chain.

For the stability of the structure, we will install two more transverse plates with rubber feet.

We will make a gas tank from a plastic bottle: we will insert two tubes into the plug, onto which we will stretch the fuel supply hoses.
Important! The bottle must be sealed tightly. Be sure to check that no gasoline is leaking through the plug.

The voltage at the generator output will be three-phase of non-standard value. In order to be able to use it for lighting, it must be straightened using an electronic converter.

Another option to bring the output voltage to standard values is to install a transformer at the generator output. In this case, it will probably have to be modified: increase or decrease the number of turns on the secondary winding.