A star-connected squirrel cage asynchronous motor with 460 Volts (between phases), 60 Hz, 3 poles, rated at 1180 rpm, It has equivalent circuit parameters of Rs = 0,19712, Rr'= 0,072, Xs = 0, Xr '= 0.672 and Rc = 0, Xm = 2002. Motor's T_load = drives a crane with a constant character. If this motor controlling with V/f technique; a. In case of 40 Hz, what should be the phase voltage? b. Rated moment? c. While running at an unknown n_x speed, If the frequency is lowered to 40 Hz to produce a braking torque of -350 Nm, what should be the slip at t=0? d. For option C, calculate the approximate stator current at t=0. e. What will be the motor speed in rpm long enough after the 40 Hz frequency has begun to be applied. Note.1: Al losses not given in question can be neglected. Note 2: It should be accepted that electrical dynamics develop much faster than mechanical dynamics. A star-connected squirrel cage asynchronous motor with 460 Volts (between phases), 60 Hz, 3 poles, rated at 1180 rpm, It has equivalent circuit parameters of Rs = 0,19712, Rr'= 0,072, Xs = 0, Xr '= 0.672 and Rc = 0, Xm = 2002. Motor's T_load = drives a crane with a constant character. If this motor controlling with V/f technique; a. In case of 40 Hz, what should be the phase voltage? b. Rated moment? c. While running at an unknown n_x speed, If the frequency is lowered to 40 Hz to produce a braking torque of -350 Nm, what should be the slip at t=0? d. For option C, calculate the approximate stator current at t=0. e. What will be the motor speed in rpm long enough after the 40 Hz frequency has begun to be applied. Note.1: Al losses not given in question can be neglected. Note 2: It should be accepted that electrical dynamics develop much faster than mechanical dynamics