Since Wr represents the departure of the rotor speed from synchronous speed, we readily see that if the rotor speed is synchronous at °1 and ° 2 , then, correspondingly, Wrl = Wr2 = O. Under this condition, Eq . (16.61) becomes
Since Wr represents the departure of the rotor speed from synchronous speed, we readily see that if the rotor speed is synchronous at °1 and ° 2 , then, correspondingly, Wrl = Wr2 = O. Under this condition, Eq . (16.61) becomes