EMF equation Of Three Phase Alternator

         EMF EQUATION:

T = no. of turns in the coil connected in series in each phase

ф = Flux per pole (Weber)

p = no. of poles

N = rotor speed (RPM)

Magnetic flux cut by a conductor in one revolution of rotor poles = p ф

Time taken by the rotor poles to make one revolution = 60/N

Flux cut per second by a conductor = pN ф /60

 Speed N = 120f/p

             Flux cut per second = 2f ф

If the coil has T turns/phase, the no. of conductors/phase = 2T
          Eav = 4fT ф

For a sinusoidally distributed flux, the emf will also sinusoidal

        Erms = Eav * 1.11

           E = 4.44fT ф (volts)

         Actually available voltage/phase is E = 4.44KcKdfT ф
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