Deif Multi-line 2 Designers Reference Handbook page 126

AGC
Speed range
Because of the characteristic above it is recommended to use the full range of the output to
avoid an unstable regulation. If the output range used is too small, a small regulation deviation
will cause a rather big output change. This is shown in the drawing below.
k
P
A 1% regulation deviation occurs. With the KP setting adjusted, the deviation causes the output
to change 5mA. The table shows that the output of the AGC changes relatively much, if the
maximum speed range is low.
Max. speed
range
10mA
20mA
DEIF A/S
k
P
5 10 15
Output change
5mA
5mA
1% regulation
deviation
mA
20 25
Output change in % of
max. speed range
5/10*100% 50
5/20*100% 25
Designer's Reference Handbook
Page 126 of 168