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I just want to know that if I connect a fan with a dc motor, then as the fan rotates with the help of wind, will it generate power? and how much? my second question is if it does then how can I use the power for charging a battery?

Saleh Ahmad Khan
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    Yes, not much, and probably via an MPPT charging circuit. See http://electronics.stackexchange.com/questions/210207/is-this-a-viable-mini-wind-turbine-setup and http://electronics.stackexchange.com/questions/17393/harvesting-energy-from-a-small-amount-of-wind?rq=1 for more detail. This is pretty much a duplicate of them... –  Mar 05 '16 at 13:40
  • What kind of motor? Where did it come from? – user57037 Mar 05 '16 at 17:54

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If I connect a fan with a dc motor, then as the fan rotates with the help of wind, will it generate power?

If you connect fan blades to a brushed dc motor, then apply enough wind power to turn the blades, then yes, it will generate an electric potential across the motor's terminals.

How much power it will generate depends kn the motor's efficiency, its rated output/draw, its rated RPM, the amount of wind striking the blades, and the size/shape/angle of the blades. Since you gave us none of that information, it's impossible for us to answer that for you.

If it does then how can I use the power for charging a battery?

First, calculate the system's output; then check the battery's charging data; finally, use those 2 sets of data to spec a dc-dc converter than can convert what you have to what you need.

Robherc KV5ROB
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