1: The blades of the windmill need to be enlarged so that the windmill has enough power to drive the generator. The bigger the blades, the better.
2: The power of the windmill has increased, but the speed is not enough. You can give the generator a 2x gear to drive the generator. That is, one rotation of the windmill will drive the generator. generator to turn twice (professional The same principle applies to wind turbines) The prior wind force must be sufficient. Coastal areas are best suited to wind energy production. Do not change the number of revolutions inside the generator. Your generator should be able to generate a voltage of 14 to 18 V and the power should be 200 W. The simpler the better. The more complicated it is, the more energy it will consume. (If you have any questions, these are my hobbies)
I personally think that if the bladesA wind turbine is made like the blades of an electric fan, the first reason is that the dead weight is too large, and the second reason is that it is directly connected when the wind is strong. The pole toppled over. Fan blades are made like wind turbines, which must spin at high speeds to be efficient. This will inevitably consume energy and require higher structural strength of the blades.