Working principle of Alternator

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Working principle of Alternator

An alternator or synchronous generator works on the principle of the Faraday law of electromagnetic induction just like in other AC generators. 

It states that whenever a conductor moves in a magnetic field, an EMF (electromotive force) or current is induced in the conductor which can be found using the EMF equation of an alternator. 

In other words, a conductor placed in a varying magnetic field also experiences EMF and it is used in alternators.

AC Generator

The direction of the induced current is determined by Fleming’s right-hand rule.

 If we arrange the thumb, forefinger and middle finger of the right hand, the thumb direction of motion, the forefinger represents induced current and the middle finger represents the direction of magnetic field lines. Therefore, they are all mutually perpendicular.

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