The no-load and locked-rotor test results of a three-phase 10 HP, 220 V, 60 Hz, 6 poles star connected induction motor a

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The no-load and locked-rotor test results of a three-phase 10
HP, 220 V, 60 Hz, 6 poles star connected induction motor are; The
no-load test: VNL=220 V, PNL=340 W, INL=6.2 A The locked-rotor
test: VSC=54 V, PSC =430 W, ISC =15.2 A The voltage across the
stator windings is 2 V when nominal DC current flows through it.
Coefficient for DC resistance is 1,25.
a) Calculate the equivalent circuit parameters and draw the
complete single-phase equivalent circuit of the induction motor.
(30 marks)
b) Calculate efficiency of the motor for s=0.06 by using the
approximate equivalent circuit (RFe core resistance is not
ignored). (30 marks)
c) Shaft torque for s=0,06 (7,5 marks) d) Slip value at the
maximum (breakdown) torque, (7,5 marks)
e) Maximum (breakdown) torque of the induction motor. (10
marks)
f) Speed of the motor at maximum torque point. (7,5 marks)
g) Rotor frequency at maximum torque. (7,5 marks