Electromagnetic generators
Recovering energy from mechanical vibrations to generate electricity
Article REF: RE135 V1
Electromagnetic generators
Recovering energy from mechanical vibrations to generate electricity

Authors : Claire JEAN-MISTRAL, Skandar BASROUR

Publication date: January 10, 2010 | Lire en français

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5. Electromagnetic generators

5.1 Operating principle

Electromagnetic generators, on the other hand, are based on electromagnetic induction, a principle demonstrated by Faraday. The electromotive force can be generated by the relative movement between a coil and a magnet creating a fixed magnetic field, or by a temporal variation in the magnetic field.

The value of the voltage generated is determined by :

em=−dΦdt( 11 )
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