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A 575-V, 50-kW, 60-Hz, three-phase synchronous motor has a synchronous reactance of X, = 4.65 $2 and an armature-to-field mutual inductance, 105 mH. The motor is operating at rated speed and terminal voltage and at an output power of 40 kW. Ignoring losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Ê af and the field current If if the motor is operating at (a) 0.9 power factor lagging, (b) unity power factor, and (c) 0.9 power factor leading. Laf =

A 575-V, 50-kW, 60-Hz, three-phase synchronous motor has a synchronous reactance of X, = 4.65 $2 and an armature-to-field mutual inductance, 105 mH. The motor is operating at rated speed and terminal voltage and at an output power of 40 kW. Ignoring losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Ê af and the field current If if the motor is operating at (a) 0.9 power factor lagging, (b) unity power factor, and (c) 0.9 power factor leading. Laf =

Introductory Circuit Analysis (13th Edition)
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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A 575-V, 50-kW, 60-Hz, three-phase synchronous motor has a synchronous reactance of X, = 4.65 $2 and an armature-to-field mutual inductance, 105 mH. The motor is operating at rated speed and terminal voltage and at an output power of 40 kW. Ignoring losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Ê af and the field current If if the motor is operating at (a) 0.9 power factor lagging, (b) unity power factor, and (c) 0.9 power factor leading. Laf =
Transcribed Image Text:A 575-V, 50-kW, 60-Hz, three-phase synchronous motor has a synchronous reactance of X, = 4.65 $2 and an armature-to-field mutual inductance, 105 mH. The motor is operating at rated speed and terminal voltage and at an output power of 40 kW. Ignoring losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Ê af and the field current If if the motor is operating at (a) 0.9 power factor lagging, (b) unity power factor, and (c) 0.9 power factor leading. Laf =
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