Motor Control - ABB ACS850 Firmware Manual

168 Parameters
No. Name/Value
38.06 U/f curve freq3
1 ... 500%
38.07 U/f curve freq4
1 ... 500%
38.08 U/f curve freq5
1 ... 500%
38.09 U/f curve volt1
0 ... 200%
38.10 U/f curve volt2
0 ... 200%
38.11 U/f curve volt3
0 ... 200%
38.12 U/f curve volt4
0 ... 200%
38.13 U/f curve volt5
0 ... 200%
40

40 Motor control

40.01 Motor noise
Cyclic
Low noise
Long cable
40.03 Slip gain
0 ... 200%
Description
Defines the frequency at the 3rd point on the custom U/f
curve in percent of parameter
3rd point, frequency.
Defines the frequency at the 4th point on the custom U/f
curve in percent of parameter
4th point, frequency.
Defines the frequency at the 5th point on the custom U/f
curve in percent of parameter
5th point, frequency.
Defines the voltage at the 1st point on the custom U/f curve in
percent of parameter 99.07 Mot nom
1st point, voltage.
Defines the voltage at the 2nd point on the custom U/f curve
in percent of parameter
2nd point, voltage.
Defines the voltage at the 3rd point on the custom U/f curve in
percent of parameter 99.07 Mot nom
3rd point, voltage.
Defines the voltage at the 4th point on the custom U/f curve in
percent of parameter 99.07 Mot nom
4th point, voltage.
Defines the voltage at the 5th point on the custom U/f curve in
percent of parameter 99.07 Mot nom
5th point, voltage.
Motor control settings.
An optimization setting for balancing between control
performance and motor noise level.
Maximizes inverter overloadability.
Minimizes motor noise.
Control performance optimized for long motor cables.
Defines the slip gain which is used to improve the estimated
motor slip. 100% means full slip gain; 0% means no slip gain.
The default value is 100%. Other values can be used if a
static speed error is detected despite of the full slip gain.
Example (with nominal load and nominal slip of 40 rpm): A
1000 rpm constant speed reference is given to the drive.
Despite of the full slip gain (= 100%), a manual tachometer
measurement from the motor axis gives a speed value of 998
rpm. The static speed error is 1000 rpm - 998 rpm = 2 rpm. To
compensate the error, the slip gain should be increased. At
the 105% gain value, no static speed error exists (2 rpm / 40
rpm = 5%).
Slip gain.
99.08 Mot nom freq.
99.08 Mot nom freq.
99.08 Mot nom freq.
voltage.
99.07 Mot nom voltage.
voltage.
voltage.
voltage.
FbEq
1 = 1%
1 = 1%
1 = 1%
1 = 1%
1 = 1%
1 = 1%
1 = 1%
1 = 1%
0
1
2
1 = 1%