Parameters 171
97
97 Motor control
Switching frequency; slip gain; voltage reserve; flux braking;
anti-cogging (signal injection); IR compensation.
97.01 Switching
frequency reference
Defines the switching frequency of the drive that is used as
long as the drive does not heat too much. See section
Switching frequency on page 43.
Higher switching frequency results in lower acoustic noise-
Note: If you have a multimotor system, contact your local
ABB representative.
4 kHz
2 kHz 2 kHz 2
4 kHz 4 kHz 4
8 kHz 8 kHz 8
16 kHz 16 kHz 16
97.02 Minimum switching
frequency
Lowest switching frequency that is allowed. Depends on the
frame size.
1.5 kHz
1.5 kHz 1.5 kHz. Not for all frame sizes. 1
2kHz 2 kHz. 2
4kHz 4 kHz. 4
8kHz 8 kHz. 8
12 kHz 12 kHz. 12
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 42.
3.50%
0.00…50.00% Voltage boost at zero speed in percent of nominal motor
voltage.
1 = 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.
Linear
Linear Linear ratio for constant torque applications. 0
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
ACQ80 FW.book Page 171 Thursday, February 14, 2019 11:33 AM
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