1) It is impossible to spin at more than 50,000 rpm. Theoretically you can rev at 200 rpm per minute, but in reality you will be overwhelmed before you reach 100 rpm, and the throttle you made is also likely to collapse. /p>
2) Regarding the power question, it cannot be higher than the original power of the engine (its structure is limited. Moreover, it depends on how much power you can generate, multiplied by the yield of approximately). 0.7, and then you How long can it be shaken manually?
Small handmade generator
Actually, if you turn the rotor at a certain speed, there will be electricity (induced current).
You can also disassemble the motor of the electric toy car, connect a small bulb to the positive and negative terminals of the motor, then turn the motor rotor hard, you will find that the light turns on.
If you make a small generator (providing a set of small LED lights), I suggest you use a DC motor fan motor, as it is simpler (the direction of the current generated will not change).
But to make a motor you need power to turn the generator, so you have to find another motor or machine to drive the generator, so it's quite inconvenient. You might as well find a transformer to convert the 220V AC current to the LED's rated voltage.
If you just want to make some small inventions as a personal hobby, just follow what I said above.
Actually, I've done something similar before out of curiosity, but at that time I was using the motor of a four-wheel drive toy. The above is just my personal experience, I hope it is helpful to you!
I wish you success!
Simply use aelectric fan to modify it. Use a household electric fan motor with a power of about 50W and match it with an industrial electric fan blade (power of about 2~300W) to create wind. generator. The effect is good,
You need to make the bracket yourself, make it swivel, and then make a rear fin for navigation, so that everything is together. The lead cable must therefore be longer. that it will not break even if it is wrapped around the bracket more than 10 times, but you need to unwind the twisted wires every day, but you can save the electrical slip ring, the technology is relatively simple
Attach the capacitor at the output end to help create the voltage and install a low power switch or overcurrent fuse to prevent the generator from overloading
Such a generator also has disadvantages , that is to say the frfrequency changes with the output power, and the voltage fluctuation is relatively large, and it is easy to burn the bulb. It can be used for rectification and charging, and the light needs to be converted into direct current. Yes, the price will be much higher. Dear.
Grid-connected operation can solve such problems, but it will also lead to new problems. When the wind power is insufficient, the wind turbine turns into an electric fan and it is easy to burn the motor. is better to cut off the start capacitor or It is also possible to change the direction and install the fan blades in another direction, but low winds will still consume some power. Installing a power relay can solve the power backflow problem, but the price of the system will increase and the gain will exceed the loss.
Note that the generator thus manufacturedqué has no overspeed protection and will be more dangerous on windy days.