ABB ACQ580 - Page 294

290 Parameters
97.13 IR compensation 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.
See also section IR compensation for scalar motor control on
page 73.
3.50%
0.00…50.00% Voltage boost at zero speed in percent of nominal motor
voltage.
1 = 1%
97.15 Motor model
temperature
adaptation
Enables the motor model temperature adaptation. Estimated
motor temperature can be used to adapt temperature
dependent parameters (e.g. resistances) of motor model.
Disabled
Disabled Temperature adaptation disabled. 0
Estimated
temperature
Temperature adaptation with motor temperature estimate
(parameter 35.01 Motor estimated temperature).
1
97.20 U/F ratio Selects the form for the U/f (voltage to frequency) ratio below
field weakening point. For scalar control only.
Note: The U/f function cannot be used with energy
optimization; if 45.11 Energy optimizer is set to Enable,
parameter 97.20 U/F ratio is ignored.
Squared
Linear Linear ratio for constant torque applications. 0
Squared Squared ratio for centrifugal pump and fan applications.
With squared U/f ratio the noise level is lower for most
operating frequencies. Not recommended for permanent
magnet motors.
1
No. Name/Value Description Def/FbEq16
U / U
N
(%)
f (Hz)
Field weakening point
Relative output voltage. No
IR compensation.
Relative output voltage. IR
compensation set to 15%.
15%
100%
50% of nominal
frequency