Converting a car generator into a powerful electric motor

Car generators, due to their design, are small in size and have very high power. It would seem that such a tiny thing can easily produce an average of 2000 W of power (there are models up to 5 kW).
A generator cannot operate like an electric motor if you simply apply voltage to it. To turn it into a small-sized, powerful motor, it needs to be modified.

Converting a generator into a powerful electric motor

In the example, use a 95 Amp model. Remove the plastic casing from the back of the generator.

Under this casing there is a three-phase bridge of rectifier diodes mounted on the radiator. And a brush assembly with an output voltage regulation controller.

Unscrew the radiator with diodes. You may have to work with wire cutters so that everything can be removed quickly.

In this model, the brushes and controller have one plastic body.

Let's saw off the brushes from the controller.

The generator itself is built as a commutator motor. It has 6 outputs respectively from three windings on the stator.

To turn on the windings in a “triangle”, you need to connect them in series with each other.

The result was an ordinary commutator, three-phase 12 V motor with a power of about 1.5 kW.
To control it, you can use a bicycle controller, which is designed to control the motor wheel. You can buy it on Ali Express -
The voltage can be any, all of them are designed for a voltage of at least 12 V. But the controller power must be at least 1.5 kW.

To start a generator as an engine, it is necessary to apply a constant voltage to its collector. To do this, we install the brush assembly in place and apply a constant voltage of 12 V to it.

The current is, of course, large, but it can be reduced depending on the required power.

We connect the controller to the engine and to the 12 V battery.

Use the control knob to adjust the engine speed.
Then such a motor can be installed on either a buggy or a bicycle. 1.5 kW of power is enough for everything.

Watch the video

In the video you can clearly see the speed and power of the buggy, built on an engine from a car generator.