Lecture 3 and 4
DC SERIESS GENERATOR
R:
Fig.3 Serries DC generrator
A DC series generator has armatu
ure and field
d windings inn series. Load is connectted to one o
of the
he series field
d terminal as shown abovee.
armature and one of th
ng a self‐excitted generator, the conditions required for self‐excittation is valid
d for this geneerator
Now, bein
also. (Reffer to lecture
e 2 notes). However,
H
unlike DC shuntt generator, Dc series geenerator term
minals
should be
e closed as shown above fo
or self‐excitattion. Otherw
wise there shaall not be anyy field currentt even
if the residual magnetiism is presentt.
The OCC w
will again be ssimilar to the
e OCC of separately and shhunt excited m
machines.
Applicatio
ons: DC seriess generators are used as b
boosters in ra ilway distribu
ution system to compensaate for
the voltagge drop. Theyy can also be u
used for any cconstant currrent applications.