Answered: separately-excited DC generator with…

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 separately-excited DC generator with compensating windings (Fig. 1), that is, effects of armature reaction is negligible, rated at 10 kW, 100 V has a magnetization curve shown in Fig. 2. Assume the generator is driven at 1600 RPM.

a.If Radj can be adjusted as shown, what is the minimum no-load terminal voltage of this generator in volts? (Answer in 2 decimal places)

b. If Radj can be adjusted as shown, what is the maximum no-load terminal voltage of this generator in volts? (Answer in 2 decimal places)

c.What is the setting of Radj in ohms if the generator is operating at its rated conditions (Output power Pout = 10 kW & Terminal voltage VT= 100 V)? (Answer in 2 decimal places)

d. What is the electromagnetic power in kW developed by the armature in Question 3? (Answer in 2 decimal places)

Terminal and generated voltage, V
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
01
0
1
2
7
3
4
5
6
Shunt field current, A
DC Generator Magnetization Curve (taken at 1800 rpm)

V = 120 V
IF
Rady=0-40 52
Ω
RF = 20 92
NF = 1000
IL
www
R₁ = 0.18 Q
EA
VT

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