Consider a separately excited DC generator rated at a field voltage of 430 V, an armature current of 400 A, and a speed of 1800 rpm. The generator is equipped with an armature resistor of 0.05 22, an adjustable field resistor ranging from 0 to 300 £2, and a field winding consisting of 1000 turns. The table below presents the generator's magnetizing characteristics at the rated speed: 100 1 200 EA(V) 3 IF(A) 0 2 If the field resistor is adjusted to 71.6 2 and the prime mover is operating at 1600 rpm, answer the following questions: 300 3 375 4 410 4.8 420 5 430 5.2 445 6 a) Draw the equivalent circuit of the generator, labeling all the components with their respective values. b) Determine the field current. c) Calculate the internal voltage. d) Assuming armature reaction is neglected, determine the current delivered to a load with a terminal voltage of 364 V. e) If armature reaction loss is considered and it decreases the field current by 20%, what is the resulting field current? f) If armature reaction loss is considered and it decreases the field current by 20%, what is the terminal voltage when the generator supplies a load with a current of 360 A and operates at its rated speed?

Consider a separately excited DC generator rated at a field voltage of 430 V, an armature current of 400 A, and a speed of 1800 rpm. The generator is equipped with an armature resistor of 0.05 22, an adjustable field resistor ranging from 0 to 300 £2, and a field winding consisting of 1000 turns. The table below presents the generator's magnetizing characteristics at the rated speed: 100 1 200 EA(V) 3 IF(A) 0 2 If the field resistor is adjusted to 71.6 2 and the prime mover is operating at 1600 rpm, answer the following questions: 300 3 375 4 410 4.8 420 5 430 5.2 445 6 a) Draw the equivalent circuit of the generator, labeling all the components with their respective values. b) Determine the field current. c) Calculate the internal voltage. d) Assuming armature reaction is neglected, determine the current delivered to a load with a terminal voltage of 364 V. e) If armature reaction loss is considered and it decreases the field current by 20%, what is the resulting field current? f) If armature reaction loss is considered and it decreases the field current by 20%, what is the terminal voltage when the generator supplies a load with a current of 360 A and operates at its rated speed?

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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