8 P.8 – A slip ring type three-phase asynchronous motor, 50HZ, 4 magnetic poles, 380V,has the following parameters: r, = 0.3, r = 0.22, m = 0.5, XM = 0.82Calculate the resistance, rEXT, connected with each windings of the rotor so that thestarting torque has its maximum value.

It is given that: f=50 HzP=4V=380Vrs=0.3 ΩrR=0.2 Ωm=0.5Xm=0.8 ΩAssuming,Xr=Xs=Xm=0.8Ω

P.8 – A slip ring type three-phase asynchronous motor, 50HZ, 4 magnetic poles, 380V, has the following parameters: r, = 0.32, r = 0.202, m = 0.5, X, = 0.82 %3D Calculate the resistance, rɛxt, connected with each windings of the rotor so that the starting torque has its maximum value.

P.8 – A slip ring type three-phase asynchronous motor, 50HZ, 4 magnetic poles, 380V, has the following parameters: r, = 0.32, r = 0.202, m = 0.5, X, = 0.82 %3D Calculate the resistance, rɛxt, connected with each windings of the rotor so that the starting torque has its maximum value.

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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Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.

Question

P.8 – A slip ring type three-phase asynchronous motor, 50HZ, 4 magnetic poles, 380V,
has the following parameters: r, = 0.3, r = 0.22, m = 0.5, XM = 0.82
Calculate the resistance, rEXT, connected with each windings of the rotor so that the
starting torque has its maximum value.

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