I need the answer as soon as possible 14. In a certain 8-pole, 50-Hz machine, the rotor resistance per phase is 0.04 2 and the maximum torqueoccurs at a speed of 645 r.p.m. Assuming that the air-gap flux is constant at all loads, determine thepercentage of maximum torque (a) at starting (b) when the slip is 3%.[(a) 0.273 (b) 0.41] (London University)15. A 6-pole, 3-phase, 50-Hz induction motor has rotor resistance and reactance of 0.02 2 and 0.1 2respectively per phase. At what speed would it develop maximum torque ? Find out the value ofresistance necessary to give half of maximum torque at starting.[800 rpm; 0.007 2] (Elect.Engg. Grad I.E.T.E. June 1988)

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14. In a certain 8-pole, 50-Hz machine, the rotor resistance per phase is 0.04 2 and the maximum torque occurs at a speed of 645 r.p.m. Assuming that the air-gap flux is constant at all loads, determine the percentage of maximum torque (a) at starting (b) when the slip is 3%. [(a) 0.273 (b) 0.41] (London University)

14. In a certain 8-pole, 50-Hz machine, the rotor resistance per phase is 0.04 2 and the maximum torque occurs at a speed of 645 r.p.m. Assuming that the air-gap flux is constant at all loads, determine the percentage of maximum torque (a) at starting (b) when the slip is 3%. [(a) 0.273 (b) 0.41] (London University)

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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