Hand crank generator battery charger circuit

AI Thread Summary
To charge a 12V rechargeable battery using a hand-cranked DC permanent motor as a generator, a circuit similar to that of a car alternator is recommended. The generator's output should be connected to a rectifier to convert the AC output to DC. Following the rectifier, a voltage regulator is necessary to ensure stable charging despite varying rotation speeds. This setup will effectively manage the power output and protect the battery. Implementing these components will facilitate efficient battery charging from manual rotation.
mawad
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Hello,
I want to use a DC permanent motor as a generator in order to use it to charge a battery. This generator will be rotated by hand. The speed is varying as it rotates by hand. I would like to know what is the circuit that I could use it to charge 12 V chargeable batter?
Best wishes,
 
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mawad said:
Hello,
I want to use a DC permanent motor as a generator in order to use it to charge a battery. This generator will be rotated by hand. The speed is varying as it rotates by hand. I would like to know what is the circuit that I could use it to charge 12 V chargeable batter?
Best wishes,

You would do basically the same thing that is done with car alternator circuits. You would follow the generator output with a rectifier and regulator.

Here is more info:

http://auto.howstuffworks.com/alternator.htm

.
 

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