Q1: A 400 V, 4 Pole, 3-phase, 50 Hz star connected induction motor has a rotor resistance and eactance per phase equal to 0.012/Phase and 0.1/Phase respectively. The magnitude of the induced .m.f. in the rotor at standstill condition is 57.735V/Phase. The full-load speed is 1440 r.p.m. Determine: i) The starting torque. ii) The additional rotor resistance required to produce 5/7 of the naximum torque at starting. i) The frequency of rotor current at full-load.

Q1: A 400 V, 4 Pole, 3-phase, 50 Hz star connected induction motor has a rotor resistance and eactance per phase equal to 0.012/Phase and 0.1/Phase respectively. The magnitude of the induced .m.f. in the rotor at standstill condition is 57.735V/Phase. The full-load speed is 1440 r.p.m. Determine: i) The starting torque. ii) The additional rotor resistance required to produce 5/7 of the naximum torque at starting. i) The frequency of rotor current at full-load.

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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