Question: A 440 V, 25 hp, 4-pole, Y - connected three-phase wound - rotor induction motor has the following circuit parameters: R1 = 0.460, R2

A 440 V, 25 hp, 4-pole, Y - connected three-phase wound -

A 440 V, 25 hp, 4-pole, Y - connected three-phase wound - rotor induction motor has the following circuit parameters: R1 = 0.460, R2 = 0.33 0, x1 = 1.10, x2 = 0.46 02, and Xm = 25 22. ( stator referred) Rotational losses (including core loss) = 500 W ( constant).(3) If an external resistance equal to the rotor resistance is added to the rotor circuit, then calculate : (a) The developed maximum torque (b) The speed at which the maximum torque is developed. (c) The starting current . (d) The starting torque Wishes

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