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The friction and windage loss is 3 of the power developed

Question: A 230V, 60Hz, 6-pole, Y-connected three-phase induction motor has the following parameters in ohms/phase as referred to the stator:

R₁ = 12.5Ω, R₂=28.6Ω, X₁=21.3Ω, X₂=13.6Ω, R_c = 4200Ω, and Xm = 1800Ω.

The friction and windage loss is 3% of the power developed. If the motor speed is 1120 rpm, determine (a) power input, (b) the stator Cu-loss, (c) the rotor Cu-loss, (d) the air-gap power, (e) the power developed. (f) the shaft torque and (g) efficiency.

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Electrical Engineering: The friction and windage loss is 3 of the power developed

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