The number of pole-pairs is 6 so the synchronous speed is. Such a rotating speed is called Synchronous speed of the alternator Synchronous speed is being notated by Ns Ns 120fP. The extreme power that can generator produced will be given when the value of torque angle d is ninety degrees.
I sync 120 f e P.
The difference between the synchronous speed and the actual speed of the rotor is known as the slip speed. The speed given by equation is called synchronous speed Ns. 120 times the frequency F divided by the number of poles P. A three-phase 12-pole 6-pole-pair synchronous motor is operating at an AC supply frequency of 60 Hz.