(c) The magnetization curve for a separately excited DC generator is shown in Figure Q4 (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is rated at 5 A. The following data are known about the machine: RA = 0.18 N Radj = 0 to 40 N NF = 1000 turns per pole VF = 130 V Rf = 20 N Answer the following questions about this generator, assuming no armature reaction. (i) Determine the range of voltage adjustments that can be achieved by changing Radj if this generator is operating at no load. (ii) Analyze the maximum and minimum no-load voltages in the generator if the field rheostat is allowed to vary from 0 to 40 2 and the generator's speed is allowed to vary from 1400 to 2000 r/min. (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 V.

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...
icon
Related questions
Question

ELECTRIC MACHINERY 

160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
2
3
Shunt field current, A
+
6000
1000
2000
3000
4000
5000
7000
Field mmf, A · turns
Figure 4(c)
Terminal and generated voltage, V
Transcribed Image Text:160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 2 3 Shunt field current, A + 6000 1000 2000 3000 4000 5000 7000 Field mmf, A · turns Figure 4(c) Terminal and generated voltage, V
(c) The magnetization curve for a separately excited DC generator is shown in Figure Q4
(c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is
rated at 5 A. The following data are known about the machine:
RA = 0.18 N
Radj = 0 to 40 N
NF = 1000 turns per pole
VF = 130 V
Rf = 20 N
Answer the following questions about this generator, assuming no armature reaction.
Determine the range of voltage adjustments that can be achieved by changing
Radj if this generator is operating at no load.
(i)
(ii) Analyze the maximum and minimum no-load voltages in the generator if the field
rheostat is allowed to vary from 0 to 40 2 and the generator's speed is allowed
to vary from 1400 to 2000 r/min.
(iii) Analyse the field current that must be flowing in the generator if the armature
current of the generator is 50 A, the speed of the generator is 1500 r/min, and the
terminal voltage is 106 V.
Transcribed Image Text:(c) The magnetization curve for a separately excited DC generator is shown in Figure Q4 (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is rated at 5 A. The following data are known about the machine: RA = 0.18 N Radj = 0 to 40 N NF = 1000 turns per pole VF = 130 V Rf = 20 N Answer the following questions about this generator, assuming no armature reaction. Determine the range of voltage adjustments that can be achieved by changing Radj if this generator is operating at no load. (i) (ii) Analyze the maximum and minimum no-load voltages in the generator if the field rheostat is allowed to vary from 0 to 40 2 and the generator's speed is allowed to vary from 1400 to 2000 r/min. (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 V.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer
Knowledge Booster
Gear motor
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,