EEE Formula: AC Motor

AC Motor:

Slip, %S =( N_S – N_R ) / N_S  x100

S =( N_S – N_R ) / N_S  

S = f_r/f

N_R  = 120f (1-S)/P

N_S = 120f /P

f_r = S x f

(N_S = Synchronous Speed RPM, N_r = Rotor Speed RPM,    f= Frequency, P = No. of Pole, S = SLip)