A 440 V, 50 Hz, 4-pole, 3-phase, delta-connected motor has. a leakage impedance of (0.3 +j 5.5 +0.25/s) 2/phase (delta) referred to the stator. The stator to rotor voltage ratio is 2.5. Determine the external resistance to be inserted in each star phase of the rotor winding such that the motor develops a gross torque of 150 Nm at a speed of 1250 rpm.
A 440 V, 50 Hz, 4-pole, 3-phase, delta-connected motor has. a leakage impedance of (0.3 +j 5.5 +0.25/s) 2/phase (delta) referred to the stator. The stator to rotor voltage ratio is 2.5. Determine the external resistance to be inserted in each star phase of the rotor winding such that the motor develops a gross torque of 150 Nm at a speed of 1250 rpm.
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter35: Harmonics 916
Section: Chapter Questions
Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
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A 440 V, 50 Hz, 4-pole, 3-phase, delta-connected motor has. a leakage impedance of (0.3 +j 5.5 +0.25/s) 2/phase (delta) referred to the stator. The stator to rotor voltage ratio is 2.5. Determine the external resistance to be inserted in each star phase of the rotor winding such that the motor develops a gross torque of 150 Nm at a speed of 1250 rpm.
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