ABB ACS880 Firmware Manual page 550

550 Parameters
No. Name / Range /
Selection
80.41 IR compensation ref
0.00 ... 50.00%
80.42 Step up frequency
2.00 ... 300.00 Hz
Description
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%
80.41
Field weakening point
50% of nominal frequency
See also section IR compensation for scalar motor
control .
Voltage boost at zero speed in percent of nominal
motor voltage.
IR compensation (ie. 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 80.41 IR compensation ref
U / U (%)
N
Relative output voltage
with IR compensation
100%
80.41
Field weakening point
80.42
0.0 Hz = Breakpoint disabled.
Note: This parameter cannot be changed while the
drive is running.
IR compensation breakpoint for step-up applications.
Relative output voltage.
No IR compensation.
f (Hz)
as shown below.
f (Hz)
Def / Type
FbEq 16b / 32b
0.00% / real32
10 = 1% / 100 = 1%
2.00 Hz / real32
10 = 1 Hz / 100 = 1 Hz