Answered: z, four-pole, induction motor connected…

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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Question

A 400V, 50Hz, four-pole, induction motor connected in star, has
these parameters in ohms: RI= 0,62, R2 = 0.33, X1 = 0.94, X2 = 1.42,
and Xm = 30. The speed of the indaction motor is controlled through
the changing of the stator voltage and frequency whilst maintaining
a constant ratio of V/Hz at rated condition. Assuming the rotor
parameters are referred to the stator and for a stator frequency of
30Hz, determine:
(i)The slip at maximum torque
(ii) The speed at maximum torque
(ili) The maximum torque

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