tomleszno
This is no joke, I have repaired screwdrivers with a LI-JON battery, all of them had damaged switches, so powered screwdrivers have a bigger hoof than the nickel ones, and they spent two three years screwing screws on the roofs.
After dismantling, I checked the motor, i.e. clearances on the sleeves and the commutator with brushes, the motors were in very good condition, they did not even spark. The motor shaft is loaded in a triangle, so most of the resistance on the bushings is taken over by the modes, otherwise it is only receiving one mode, the front and rear bushings it is rubbed on opposite sides. It is known that it is not a professional generator, but the wind does not blow so strong all the time that it would destroy the generator after a few days. This solution is partially educational for less advanced hobbyists because it is simple and cheap. I am going to build a wind farm. but I live in the city center in a one-family estate and there are houses around, but the wind is even quite strong, I have a 1.5 kW DC motor with its own excitation 8 pole pieces, at 600 rpm it gives about 250 Volt vertical turbine three blades AL 1 sheet at 2m, the height and shape of the blades must be selected experimentally mounted in the frame in the frame, suspension, two crosses from the washing machine, automatic the removal of the seals is very easy, simple and cheap on two bearings. Advantage no permit needed because it is a long haul truck. The use of water heating, without batteries, which lowers the cost, and an additional tank as a battery is relatively cheap. I think it will work out.