�Windmill power generation
Two
windmills (two blades) generating 500watt and one windmill (three
blades) generating 300watt are installed at the site on three wooden
posts 9m tall. The generated electricity is first rectified and used to
charge four batteries of 6 volts in series.
Then, the direct current of 24volt is fed to the inverter through a
controller producing a 50Hz alternative current of 240volt. When the
batteries are fully charged, the controller switches the excessive
electricity to an heating element in the hot cylinder. As the
alternative current has a rectangular form and high harmonics, we would
like to investigate how a direct current can be used without an
inverter or a low pass filter. However, it is possible to produce
enough electricity for lights and a small refrigerator.
On a windy day enough electricity is produced for washing and vacuum
cleaning.
windmills(in the day) 
windmill(in the evening) 
windmill control panel