b. A three-phase, 400 V, 50 Hz, 6-poles, 960 rpm, star-connected induction motor has the following parameter per phase referred to the stator; R; = 0.4 0, R2 = 0.2 0, X1 = X2 = 1.5 0 and Xm = 30 Q. The motor is controlled by variable frequency control at a constant flux of rated value. Examine the followings; i. motor speed and stator current at half the rated torque and 25 Hz, ii. assuming the speed-torque curve to be straight lines, solve for part (i) for s < Sm,

b. A three-phase, 400 V, 50 Hz, 6-poles, 960 rpm, star-connected induction motor has the following parameter per phase referred to the stator; R; = 0.4 0, R2 = 0.2 0, X1 = X2 = 1.5 0 and Xm = 30 Q. The motor is controlled by variable frequency control at a constant flux of rated value. Examine the followings; i. motor speed and stator current at half the rated torque and 25 Hz, ii. assuming the speed-torque curve to be straight lines, solve for part (i) for s < Sm,

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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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

b. A three-phase, 400 V, 50 Hz, 6-poles, 960 rpm, star-connected induction motor has
the following parameter per phase referred to the stator; R; = 0.4 0, R2 = 0.2 0,
X1 = X2 = 1.5 Q and Xm = 30 Q. The motor is controlled by variable frequency control
at a constant flux of rated value. Examine the followings;
i.
motor speed and stator current at half the rated torque and 25 Hz,
ii.
assuming the speed-torque curve to be straight lines, solve for part (i) for s < Sm,

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