Answered: A 4-pole, 3-phase, 50Hz induction motor…

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 4-pole, 3-phase, 50Hz induction motor has a voltage between slip-rings on open circuit of 520V. The star connected rotor has a standstill reactance and resistance of 2.0 and 0.4 Ω per phase respectively. Determine:

(a) The full-load torque if full load speed is 1,425 rpm
(b) The ratio of starting torque to full-load torque
(c) The additional rotor resistance required to give maximum torque at standstill.

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