A synchronous, Y-connected, 6 poles, motor has a synchronous reactance of 2.5 Q anddraws 100 A/line at unity power factor and rated voltage of 460 V line to line. Assumingconstant line voltage, determine.a) The maximum power and torque available from this machine assuming constant fieldexcitation.b) The line current and power factor if the machine field excitation is increased by 25%,assuming load power is constant.c) Draw the phasor diagram for this condition

For a synchronous motor operation at unity power factor, the generated EMF, Ef is calculated as:…

Answered: ine at unity power factor and rated…

ine at unity power factor and rated voltage woltage, determine. um power and torque available from this m rrent and power factor if the machine field d power is constant.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Question

A synchronous, Y-connected, 6 poles, motor has a synchronous reactance of 2.5 Q and
draws 100 A/line at unity power factor and rated voltage of 460 V line to line. Assuming
constant line voltage, determine.
a) The maximum power and torque available from this machine assuming constant field
excitation.
b) The line current and power factor if the machine field excitation is increased by 25%,
assuming load power is constant.
c) Draw the phasor diagram for this condition

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