i. 

Determine the stator speed and mechanical speed

ii.

Sketch the per-phase equivalent circuit and label all the voltages, currents and impedances (with values)

iii. 

Determine phase current, line current and input power

iv. 

Determine rotor current

v. 

Determine stator copper loss

vi. 

Determine air gap power and the power converted from electrical form to mechanical form

vii. 

Determine the output torque and output power delivered to the motor shaft 

viii. 

Sketch the power flow diagram and determine the overall machine efficiency

Transcribed Image Text:

A 6-pole, 240 V, 60 Hz, A-connected, three-phase induction motor has the following per-phase parameters: R₁ = 10.12 22 X1 = 38.61 02 R2 = 21.970 X2 = 11.56 2 RC = 5267.18 2 XM = 432.48 02 The slip value is 0.1667. At this slip value, core loss is 50W and friction and windage loss is 3.5 W. At this condition: A 6-pole, 240 V, 60 Hz, A-connected, three-phase induction motor has the following per-phase parameters: R₁ = 10.12 22 X1 = 38.61 02 R2 = 21.970 X2 = 11.56 2 RC = 5267.18 2 XM = 432.48 02 The slip value is 0.1667. At this slip value, core loss is 50W and friction and windage loss is 3.5 W. At this condition: