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A 3-phase, 200-hp, 3300-V, star-connected induction motor has the following equivalent circuit parameters per phase: R1 = R2 =0.8 ohm; x1 x'2 3.5 ohm Calculate the slip at full load if the friction and windage loss is 3 kW. How much extra rotor resistance would be necessary to increase the slip to three times this value with the full-load torque maintained? How much extra stator resistance would be necessary to achieve the same object and what loss of peak torque would result?

A 3-phase, 200-hp, 3300-V, star-connected induction motor has the following equivalent circuit parameters per phase: R1 = R2 =0.8 ohm; x1 x'2 3.5 ohm Calculate the slip at full load if the friction and windage loss is 3 kW. How much extra rotor resistance would be necessary to increase the slip to three times this value with the full-load torque maintained? How much extra stator resistance would be necessary to achieve the same object and what loss of peak torque would result?

Introductory Circuit Analysis (13th Edition)
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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A 3-phase, 200-hp, 3300-V, star-connected induction motor has the following equivalent circuit parameters per phase: RI = R2 =0.8 ohm; x1 x'2=3.5 ohm rks Calculate the slip at full load if the friction and windage loss is 3 kW. How much extra rotor resistance would be necessary to increase the slip to three times this value with the full-load torque maintained? How much extra stator resistance would be necessary to achieve the same object and what loss of peak torque would result?
Transcribed Image Text:A 3-phase, 200-hp, 3300-V, star-connected induction motor has the following equivalent circuit parameters per phase: RI = R2 =0.8 ohm; x1 x'2=3.5 ohm rks Calculate the slip at full load if the friction and windage loss is 3 kW. How much extra rotor resistance would be necessary to increase the slip to three times this value with the full-load torque maintained? How much extra stator resistance would be necessary to achieve the same object and what loss of peak torque would result?
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