I am running a DC motor through a bicycle and charging a battery. Does battery gets charged while pedaling in both the directions? I observed from voltmeter one is negative voltage. I am novice in Electrical Engg.
closed as unclear what you're asking by laptop2d, Dwayne Reid, Dmitry Grigoryev, MCG, Kevin Reid Jun 19 '18 at 21:42
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Given that you are storing in a battery, I assume you are using a dynamo. Dynamos work by using the motion of a conducting coil in a magnetic field. This induces current in a specific direction in the coil. Reversing either the magnetic field or the motion of the coil inverts the direction of the current. So yes, it is reasonable that once you getting positive voltage and on pedaling backwards you are getting negative voltage.