Answered: A single-phase, 120 V, 60 Hz,…

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 single-phase, 120 V, 60 Hz, four-pole, split-phase induction motor has the following equivalent
circuit parameters: R1m=1.5Ω, R1a=2.5Ω, R/
2=1Ω, X1m=2.5Ω, X1a =2.5Ω, X/
2=1.5Ω, Xmag =40Ω
a) Determine the standstill impedances (Zm, Za) of the windings.
b) Determine the starting torque and the starting current of the motor if it is started from rated voltage
mains as a resistor split-phase motor.
c) Determine the value of the capacitor to be connected in series with the auxiliary winding to
produce maximum starting torque per ampere of starting current. Determine the value of the
starting torque and starting current.
d) Compare the starting torque per ampere of starting current for cases (b) and (c)

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