How to make a powerful low-voltage engine from a car generator

How to make a powerful brushless motor from a car generator

At its core, a car generator is practically no different from a three-phase asynchronous electric motor, with the exception that the generator does not use a squirrel-cage rotor, but with an excitation winding.

Converting such a generator into a powerful and high-speed electric motor will not be difficult. You can make a controller to control it yourself from just 3 transistors, without the use of microcircuits.

Details

Transistor IRF3205 - 3 pcs. - http://alii.pub/68qqw8
Diode 1N4007 - 6 pcs. - http://alii.pub/5m5na6
KOhm resistors - 3 pcs.; 4.7 kOhm - 1 pc. - http://alii.pub/5h6ouv
Variable resistor 100 kOhm. - http://alii.pub/5o27v2
18650 battery - http://alii.pub/5becfz

Manufacturing a controller for a three-phase motor

The controller circuit is extremely simple and resembles a three-phase multivibrator.

Excitation to the rotor is supplied from a 3.7 V battery. Using a variable resistor, you can adjust the engine speed.

The diagram, for clarity, is assembled by hanging installation.The mosfets are installed on the radiator through a heat-conducting dielectric pad.

How to make a powerful low-voltage electric motor from a generator

Next, you need to slightly modify the future electric motor. We remove the block with the rectifier block from the generator.

Solder the wire to the common wire connecting the generator coils.

We solder the wires to the phases and insulate them with heat shrink.

We solder the wires to the rotor commutator brushes, then to the block with the battery.

We install the battery in the box, supply power from a DC source to the 12-19 V circuit. Using a variable resistor slider, we adjust the engine speed.

Maximum rotation speed over 7000 rpm.

The whole point of this modification is that at the output you get a powerful and high-speed electric motor with low-voltage power supply. Well, where it can be applied is up to you, as always.