3.A 3-phase, 4 pole ,60 Hz slip ring, induction motor with star connected rotor has an induced emfof 240 volts between slip rings at standstill with normal voltage applied to the stator. The rotorwinding has a resistance per phase of 0.5 Q and standstill leakage reactance per phase of 3 Q.Calculate:(1) rotor current/phase when running short circuited with 6% slip and its torque(ii) the slip, speed, torque and rotor current per phase when the rotor is developing maximumtorque.

Answered: Image /qna-images/answer/a397f2ec-8eaa-41d3-8d14-0569e1079794.jpg

3.A 3-phase,4 pole ,60 Hz slip ring, induction motor with star connected rotor has an induced emf of 240 volts between slip rings at standstill with normal voltage applied to the stator. The rotor winding has a resistance per phase of 0.5 2 and standstill leakage reactance per phase of 3 22. Calculate: (i) rotor current/phase when running short circuited with 6% slip and its torque (ii) the slip, speed, torque and rotor current per phase when the rotor is developing maximum torque.

3.A 3-phase,4 pole ,60 Hz slip ring, induction motor with star connected rotor has an induced emf of 240 volts between slip rings at standstill with normal voltage applied to the stator. The rotor winding has a resistance per phase of 0.5 2 and standstill leakage reactance per phase of 3 22. Calculate: (i) rotor current/phase when running short circuited with 6% slip and its torque (ii) the slip, speed, torque and rotor current per phase when the rotor is developing maximum torque.

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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