ABB ACS880-104

Parameters 489
96.108 LSU control board
boot
(Only visible when IGBT supply unit control activated by
95.20)
Changing the value of this parameter to 1 reboots the supply
control unit (without requiring a power off/on cycle of the drive
system).
The value reverts to 0 automatically.
0
0…1 1 = Reboot the supply control unit. 1 = 1
97
97 Motor control
Motor model settings.
97.01 Switching
frequency reference
Defines the switching frequency when it is not otherwise
being internally limited.
Note: This is an expert level parameter and should not be
adjusted without appropriate skill.
4.500 kHz
0.000 … 24.000
kHz
Switching frequency reference. 1000 = 1 kHz
97.02 Minimum switching
frequency
Defines a minimum switching frequency reference. The
actual switching frequency will not fall below this limit under
any circumstances.
Notes:
• This is an expert level parameter and should not be
adjusted without appropriate skill.
• The drive has internal switching frequency limits that may
override the value entered here.
1.500 kHz
0.000 … 24.000
kHz
Minimum switching frequency. 1000 = 1 kHz
97.03 Slip gain Defines the slip gain which is used to improve the estimated
motor slip. 100% means full slip gain; 0% means no slip gain.
The default value is 100%. Other values can be used if a
static speed error is detected despite having the setting at full
slip gain.
Example (with nominal load and nominal slip of 40 rpm): A
1000 rpm constant speed reference is given to the drive.
Despite having full slip gain (= 100%), a manual tachometer
measurement from the motor axis gives a speed value of 998
rpm. The static speed error is 1000 rpm - 998 rpm = 2 rpm. To
compensate the error, the slip gain should be increased to
105% (2 rpm / 40 rpm = 5%).
100%
0 … 200% Slip gain. 1 = 1%
97.04 Voltage reserve Defines the minimum allowed voltage reserve. When the
voltage reserve has decreased to the set value, the drive
enters the field weakening area.
Note: This is an expert level parameter and should not be
adjusted without appropriate skill.
If the intermediate circuit DC voltage U
dc
= 550 V and the
voltage reserve is 5%, the RMS value of the maximum output
voltage in steady-state operation is
0.95 × 550 V / sqrt(2) = 369 V
The dynamic performance of the motor control in the field
weakening area can be improved by increasing the voltage
reserve value, but the drive enters the field weakening area
earlier.
-2%
-4 … 50% Voltage reserve. 1 = 1%
No. Name/Value Description Def/FbEq16