ABB ACS880 Firmware Manual page 494

494 Parameters
No. Name/Value
97.12 IR comp step-up
frequency
0.0 ... 50.0 Hz
97.13 IR compensation
0.00 ... 50.00%
Description
IR compensation (i.e. output voltage boost) can be used in
step-up applications to compensate for resistive losses in
the step-up transformer, cabling and motor. As voltage
cannot be fed through a step-up transformer at 0 Hz, a
specific type of IR compensation should be used.
This parameter adds a frequency breakpoint for parameter
97.13 IR compensation
U / U
N
(%)
Relative output voltage with IR
compensation
100%
97.13
97.12 Field weakening
0.0 Hz = Breakpoint disabled.
IR compensation breakpoint for step-up applications.
Defines the relative output voltage boost at zero speed (IR
compensation). The function is useful in applications with a
high break-away torque where direct torque control (DTC
mode) cannot be applied.
U / U
N
(%)
Relative output voltage with IR
compensation
100%
97.13
Field weakening point
50% of nominal frequency
See also section IR compensation for scalar motor control
on page 99.
Voltage boost at zero speed in percent of nominal motor
voltage.
as shown below.
point
Relative output voltage. No
IR compensation.
Def/FbEq16
0.0 Hz
f (Hz)
1 = 1 Hz
0.00%
f (Hz)
1 = 1%