ABB ACS560 Firmware Manual page 363

No. Name/Value
97.13 IR compensation
0.00...50.00%
97.20 U/F ratio
Linear
Squared
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 vector control cannot be
applied.
U / U
N
(%)
Relative output voltage. IR
compensation set to 15%.
100%
15%
Field weakening point
50% of nominal
frequency
See also section IR compensation for scalar motor control
page 66.
Typical IR compensation values are shown below.
3-phase 380...415V drives
P (kW) 0, 37 0, 75 1, 1 2, 2
N
IR 3, 5 3, 5 3, 2 2, 5
compen
-sation
(%)
WARNING! Set IR compensation value as low as
possible. Large IR compensation value can lead to
overheating of the motor and damage to the drive, if
operated for longer periods at low speed.
Voltage boost at zero speed in percent of nominal motor
voltage.
Selects the form for the U/f (voltage to frequency) ratio below
field weakening point. For scalar control only.
Linear ratio for constant torque applications.
Squared ratio for centrifugal pump and fan applications.
With squared U/f ratio the noise level is lower for most
operating frequencies.
Parameters 363
Relative output voltage. No
IR compensation.
f (Hz)
4 7, 5 15 37 132
2 1, 5 1.3 1.1 0.6
Def/FbEq16
3.50%
on
1 = 1%
Linear
0
1