Alternator and its principle of operation

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an alternator is an electrical machine which converts mech.energy into electrical energy in the form of 3 phase alternating current or alternating voltage. an alternator is also known as synchronous generator. sysnchrounous generators works on the principle of electromagnetic induction as that of DC generators,which states that an EMF is induced in the conductors due to the relative motion between the stator conductors and the rotating magnet field. The nature of the EMF induced is same as that in the case of DC generators and is an alternating quantity. the basic difference between an alternator and DC generators is that , in the case of DC generators the armature is the rotating part and the field system is the stationary where as in the case of AC generators of alternators the armature is the stationaty and the field system is rotatory..