Answered: 209V, three-phase, Six poles,…

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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209V, three-phase, Six poles, Y-connected induction motor has the following parameter: R1=0.128 Ohm, R'2=0.0935 Ohm, Xeq=0.49 Ohm. the motor slip at full load is 2% and for a Fan-Type load, Calculate following below : I have the Final answers and I do need to step by step which the formula and solution. Please if you use handwriting to write clearly and big. Thanks, The final and correct answers are: Problem3 (Reducing supply voltage) a) motor speed: 1163.3 rpm, b) starting torque= 71.93 Nm, c)starting current=179.5A, efficiency= 93.04%

Problem 3
For the motor in Problem 1 and for a fan-type load, calculate the following if the voltage is reduced by 20%:
a. Motor speed
b. Starting torque
c. Starting current
d. Motor efficiency (ignore rotational and core losses)

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