Page 49 - basic control system
P. 49
APPLICATION
shaft
Tachometer
coupling
Field current Tachometer
constant
DC Motor Speed Control
The D.C. shunt motor is used where field current is kept
constant and armature voltage is changed to obtain the
desired speed. The feedback is taken by speed tachometer.
This generates voltage proportional to speed which is
compared with voltage required to the desired speed. This
difference is used to change the input to controller which
cumulatively changes the speed of the motor as required.
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