Just use an electric 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 make a wind generator. The effect is good.< /p>
You need to make the bracket yourself, make it swingable, and then make the tail fin for navigation, so that it is all together. The lead cable should be longer, so that it will not break even if it is wound around the bracket more than 10 times, but it needs to be done every day Unwind the twisted wires, but you can omit the electric slip ring. The technology is relatively simple
Fix the capacitor at the output end to help build voltage, and install a low-power switch or fuse with overcurrent to prevent the generator from running. Overload
This kind of generator also has disadvantages, that is, the frequency changes with the output power, and the voltage fluctuation is relatively large, which is easy to burn the light bulb. It can be used for rectification and charging. The light needs to be converted to DC, and the price is also high. It will be much more expensive.
Grid-connected operation can solve such problems, but it will also bring new problems. When the wind power is insufficient, the wind turbine will turn into an electric fan and it is easy to burn the motor. It is best to cut off the starting 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 problem of power backflow, but the price of the system will increase, and the gain outweighs the loss.
Note that the generator made in this way does not have overspeed protection and will be more dangerous on windy days.
The installation and transportation costs of 2-blade blades are lower than those of 3-blade blades. In addition, the tip speed ratio of the 2-blade is higher than that of the 3-blade. If it is used to generate electricity, the speed increase ratio of the gearbox is smaller than that of the 3-blade, so the cost of the gearbox is less.
ps
The hub structure of the 2-blade is special, with a seesaw structure, and the fatigue problem is more serious than that of the 3-blade. So each has its pros and cons.