MUGL
Page 20 of 38
rev. 18 November 2009
10.2 Control system description
The control system is based on two PID loops in sequence, named “Inner loop and Outer
loop”.
The inner loop is the fastest and will adjust the current in the load. It takes as input the
reference of the outer loop
The outer loop regulates the output voltage, reacts more slowly and it provides the value
of current to the inner loop. It takes as input the main reference and the feedback comes
from the output voltage of the converter.
Outer loop
Output voltage
+
-
REF (from
potentiometer or
from input)
REF1 to inner
loop
1
1
+
+
+
Derivative limitation
Integral limitation
