Can someone help me with this?
2. Calculate the synchronous speed, maximum (critical) torque, and critical slip of an induction motor at a frequency of 52.5Hz and rated supply voltage. The passport data of the motor are: PN = 7.5 kW, stator line-to-zero voltage U1 = 220V, sN = 5.1%, rated efficiency factor = 82.5%, cosfi = 0.77, p = 3, R1 = 0.054 Ohm, X1 = 0.079 Ohm, R2 = 0.068 Ohm, X2 = 0.120 Ohm.