pedal When the person she turns the wheel, which causes a magneto (called "Dynamo bike"). The AC thus produced is recovered: energy obtained is stored in capacitors. When the voltage across the terminals of capacitors , representative the amount of energy stored by them, exceeds a threshold, then the energy contained in capacitors is sent to the excitation of the alternator . The alternator can then begin producing himself the energy required for its excitation. The excitation power is about 25 watt .
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