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Q29/ A 3-phase induction motor has a synchronous speed of 250 r.p.m. and 4% slip at full-load. The rotor has a resistance of 0.022 per phase and standstill leakage reactance of 0.152 per phase. Calculate (i) the ratio of maximum and full-load torque (ii) the speed at which the maximum torque develops. Neglect resistance and leakage reactance of the stator. Ans[1.82, 217 r.p.m]

Q29/ A 3-phase induction motor has a synchronous speed of 250 r.p.m. and 4% slip at full-load. The rotor has a resistance of 0.022 per phase and standstill leakage reactance of 0.152 per phase. Calculate (i) the ratio of maximum and full-load torque (ii) the speed at which the maximum torque develops. Neglect resistance and leakage reactance of the stator. Ans[1.82, 217 r.p.m]

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Q29/ A 3-phase induction motor has a synchronous speed of 250 r.p.m. and 4% slip at full-load. The rotor has a resistance of 0.022 per phase and standstill leakage reactance of 0.152 per phase. Calculate (i) the ratio of maximum and full-load torque (ii) the speed at which the maximum torque develops. Neglect resistance and leakage reactance of the stator. Ans[1.82, 217 r.p.m]
Transcribed Image Text:Q29/ A 3-phase induction motor has a synchronous speed of 250 r.p.m. and 4% slip at full-load. The rotor has a resistance of 0.022 per phase and standstill leakage reactance of 0.152 per phase. Calculate (i) the ratio of maximum and full-load torque (ii) the speed at which the maximum torque develops. Neglect resistance and leakage reactance of the stator. Ans[1.82, 217 r.p.m]
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