# Note: The answers are provided as a reference, I just want to know the method used to obtain them. P

Note: The answers are provided as a reference, I just want to know the method used to obtain them. Problem Six A 3-phase, 4-pole, star connected, 415 V (line to line), 50 Hz, wound rotor induction motor has the following per phase T equivalent circuit parameters: 0.60 , R2&#39; 0.56 Q, X1 = 1.40, X2&#39;= 1.35 2, Xm= 60.50 2, and Rc 0 The retarding torque due to the total of friction, windage and core losses may be assumed to be 5 Nm, independent of load and speed (a) Calculate the starting internal or electromagnetic torque and the corresponding stator current; (b) Calculate the maximum internal or electromagnetic torque and the corresponding rotor speed; (c) Sketch the torque/speed results of (a) and (b); (d) If this induction machine is operated as a motor driving 60 Nm, calculate the steady state speed, stator current, output power and efficiency; (e) If this induction machine is used as a turbine through a gearbox, calculate its output power and efficiency curve for 415 V (line to line), 50 Hz operation, using the a constant torque load of generator driven at 1545 rev/min by a wind (25 marks) Answer: AT (a) Tst = 68.93 (Nm), I., = 80.28e 167.13″ (A) (b) S, 3D 0.1990, о, 31201.50 (rev/min), Tw 160.54 (Nm) (c) – Tromg Tu max C Sm Wryn (d) о, 1444.53 (rev/min), /, =15.45e j23.03″ (A). = S P out 9076.28 (W), 7 = 88.78% – (е) Р -8835.98 (W), n =89.12% = . out