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A 3-phase induction motor has a 4-pole, star-connected stator winding and runs on a 220 V, 50 Hz supply. The rotor resistance is 0-1 /phase and rotor reactance is 0-9 2 per/phase. The ratio of stator to rotor turns is 1-75. The full-load slip is 5 %. Calculate (i) the full-load torque (ii) the maximum torque (iii) the speed at maximum torque. [() 42 N-m (ii) 56 N-m (ii) 1330 r.p.m.]

A 3-phase induction motor has a 4-pole, star-connected stator winding and runs on a 220 V, 50 Hz supply. The rotor resistance is 0-1 /phase and rotor reactance is 0-9 2 per/phase. The ratio of stator to rotor turns is 1-75. The full-load slip is 5 %. Calculate (i) the full-load torque (ii) the maximum torque (iii) the speed at maximum torque. [() 42 N-m (ii) 56 N-m (ii) 1330 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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1. A 3-phase induction motor has a 4-pole, star-connected stator winding and runs on a 220 V, 50 Hz supply. The rotor resistance is 0-1/phase and rotor reactance is 0-9 2 per/phase. The ratio of stator to rotor turns is 1-75. The full-load slip is 5 %. Calculate (i) the full-load torque (ii) the maximum torque (iii) the speed at maximum torque. [() 42 N-m (i) 56 N-m (iii) 1330 r.p.m.]
Transcribed Image Text:1. A 3-phase induction motor has a 4-pole, star-connected stator winding and runs on a 220 V, 50 Hz supply. The rotor resistance is 0-1/phase and rotor reactance is 0-9 2 per/phase. The ratio of stator to rotor turns is 1-75. The full-load slip is 5 %. Calculate (i) the full-load torque (ii) the maximum torque (iii) the speed at maximum torque. [() 42 N-m (i) 56 N-m (iii) 1330 r.p.m.]
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