A 4-pole, 3-phase, 50 Hz induction motor has a voltage between slip-rings on open-circuit of 520 V. The star-connected rotor has a standstill reactance and resistance of 2.0 and 0.4 Q per phase respectively. Determine : (a) the full-load torque if full-load speed is 1,425 r.p.m.

A 4-pole, 3-phase, 50 Hz induction motor has a voltage between slip-rings on open-circuit of 520 V. The star-connected rotor has a standstill reactance and resistance of 2.0 and 0.4 Q per phase respectively. Determine : (a) the full-load torque if full-load speed is 1,425 r.p.m.

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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Question

Answer : 200 N-m

A 4-pole, 3-phase, 50 Hz induction motor has a voltage between slip-rings on open-circuit of 520 V.
The star-connected rotor has a standstill reactance and resistance of 2.0 and 0.4 2 per phase
respectively. Determine :
(a) the full-load torque if full-load speed is 1,425 r.p.m.

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