Parker 590 series - CURRENT LOOP

6-14 Programming Your Application
590 Series DC Digital Converter
CURRENT LOOP
This function block allows user
parameterisation of the conventional
current/torque loop of the converter.
CURRENT LOOP
–
AT CURRENT LIMIT [ 42]
–
FALSE
–
CURRENT FEEDBACK [298]
–
0.00%
–
CURRENT DEMAND [299]
–
0.00%
100.00 %
–
[ 15] CUR. LIMIT/SCALER
–
200.00 %
–
[421] MAIN CURR. LIMIT
–
45.00
–
[ 16] PROP GAIN
–
3.50
–
[ 17] INT. GAIN
–
–
AUTOTUNE [ 18]
–
OFF
12.00 %
–
[137] DISCONTINUOUS
–
0.00 %
–
[ 30] ADDITIONAL DEM
–
DISABLED
–
[ 90] BIPOLAR CLAMPS
–
ENABLED
–
[201] REGEN MODE
–
100.00 %
–
[301] POS. I CLAMP
–
-100.00 %
–
[ 48] NEG. I CLAMP
–
DISABLED
–
[119] I DMD. ISOLATE
–
–
ILOOP SUSPEND [ 46]
–
TRUE
MMI Menu Map
1
SETUP PARAMETERS
2
CURRENT LOOP
CUR. LIMIT/SCALER
MAIN CURR. LIMIT
PROP GAIN
INT. GAIN
AUTOTUNE
DISCONTINUOUS
ADDITIONAL DEM
BIPOLAR CLAMPS
REGEN MODE
POS. I CLAMP
NEG. I CLAMP
I DMD. ISOLATE
Parameter Descriptions
CUR. LIMIT/SCALER
Range: 0.00 to 200.00 %
Current limit scaler. It scales bipolar/unipolar clamps.
MAIN CURR. LIMIT
Range: 0.00 to 200.00 %
Main current limit parameter which is independent of current limit scaler and in series with the
other three current limit blocks.
PROP GAIN
Range: 0.00 to 200.00
Proportional gain control for armature current PI loop. This parameter is set during the autotune
function.
INT. GAIN
Range: 0.00 to 200.00
Integral gain control for armature current PI loop. This parameter is set during the autotune
function.
DISCONTINUOUS
Range: 0.00 to 200.00 %
Discontinuous-to-continuous mean armature current boundary level. This parameter is set during
the autotune function and affects the performance of the adaptive algorithm.
ADDITIONAL DEM
Range: -200.00 to 200.00 %
Additional current demand input.
BIPOLAR CLAMPS
Range: ENABLED/DISABLED
Select input for bipolar (asymmetric) or unipolar (symmetric) current clamps for the 4 quadrants
of operation. Default setting of DISABLED means UNIPOLAR clamps selected.
REGEN MODE
Range: ENABLED/DISABLED
Select input for regenerative (4-quadrant) or non-regenerative (2-quadrant) mode of operation. If
the stack is a 2-quadrant (only one thyristor bridge) this parameter should be set to Disabled.
Note: we recommend that this parameter is not changed whilst the machine is running.
POS. I CLAMP
Range: -200.00 to 200.00 %
Positive current clamp in Bipolar Clamp mode.
NEG. I CLAMP
Range: -200.00 to 200.00 %
Negative current clamp in Bipolar Clamp mode.
Note on bipolar current clamps: these clamps in bipolar mode can cross-over onto the same
quadrant as long as the POS. I CLAMP is always greater (algebraically) than the NEG. I
CLAMP.