For all graphs, origin should be (O ) volt and (0 ) amp. 1- Plot all the 4 external characteristics, i.e. for (A ) separate excitation, ( B ) self excited shunt, ( C compound excitation cumulative and differential in the same graph sheet. V. in y - axis and IT, in x - axis.

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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26
Asiacell
2 9:Y0 O1%V 36
lor B/s
Asiacell
2nd exp..p... >
E. Report :
- -
For all graphs, origin should be ( 0 ) volt and CO) amp.
1- Plot
all
the 4 external characteristics,
i.e.
for
A )
separate
excitation,
(B ) self excited shunt,
(C)
compound
excitation cumulative and differential in the same graph
sheet.
V. in y - axis and IT, in x - axis.
2- Experiment A : Calculate the internal characteristic which is
the plot
of the induced emf against the
load
current.
Assume
the armature reaction
to
be
negligible. Plot
the internal
characteristic
and
the
external characteristic in
the
same
graph sheet.
3- Experiment B : Determine the internal characteristic and plot
external
and
internal characteristics in
the
same graph sheet.
4- Experiment C : Determine
the internal characteristic and plot
them along with the external characteristic
in
the
same sheet.
5- Why should the terminal voltage drop more in the case of shunt
generator than in the case of separately excited generator as the
load current is increased ?
6- Why it is possible to short circuit the differential
compound
generator and not the cumulative compound generator ?
2 - 5
Il>
220 v i
D.C.
Fig.1 - Load
...
Transcribed Image Text:26 Asiacell 2 9:Y0 O1%V 36 lor B/s Asiacell 2nd exp..p... > E. Report : - - For all graphs, origin should be ( 0 ) volt and CO) amp. 1- Plot all the 4 external characteristics, i.e. for A ) separate excitation, (B ) self excited shunt, (C) compound excitation cumulative and differential in the same graph sheet. V. in y - axis and IT, in x - axis. 2- Experiment A : Calculate the internal characteristic which is the plot of the induced emf against the load current. Assume the armature reaction to be negligible. Plot the internal characteristic and the external characteristic in the same graph sheet. 3- Experiment B : Determine the internal characteristic and plot external and internal characteristics in the same graph sheet. 4- Experiment C : Determine the internal characteristic and plot them along with the external characteristic in the same sheet. 5- Why should the terminal voltage drop more in the case of shunt generator than in the case of separately excited generator as the load current is increased ? 6- Why it is possible to short circuit the differential compound generator and not the cumulative compound generator ? 2 - 5 Il> 220 v i D.C. Fig.1 - Load ...
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