Classic P3 x/x - 240-840A
24
Current controller - PI loop circuit
for a positive command value
Bridge 2
positive R33, C81
Basic set-up
Amplification
~
1.1
Integration time
~
15ms
Changing the amplification
Bridge 2:
X
P
=
Changing the integration time
Bridge 2:
Optimization of the
current controller
- Connect an oscilloscope across the current actual value
X3:21
- Current command value step-change
±
1V
X3:16
- Increase the current command value by 1V steps to
±
10V
- Alter the P-amplification by means of the resistor R33
- Optimal adjustment see fig. 1
- Not permissible adjustment see fig. 2
- Alter the integral part by means of the capacitor C81
Oscilloscope - Current adjustment
Fig. 1
Fig. 2
Fig. 3
Note: Any changes in the optimization of the current controller
must be checked by means of an oscilloscope.
C
u
rr
en
t
co
n
tro
lle
r
Bridge 2
18kW
x
R14
18kW + R14
43kW
t
[ms]- 18kW
x
R33
18kW + R33
x
1µF + C81
