ABB ACH550-01 User Manual page 245

Code Description
2606 SWITCHING FREQ
Sets the switching frequency for the drive.
• Higher switching frequencies mean less noise.
• In multimotor systems, do not change the switching frequency from
the default value.
• 12 kHz switching frequency is available in scalar control mode, that is
when parameter 9904
• See the availability of switching frequencies for different drive types in
the table below:
Power (kW)
0.75...37
45...110
132
...160
* 12 kHz only in scalar control mode
2607 SWITCH FREQ CTRL
Activates the switching frequency control. When active, the selection of
parameter 2606
temperature increases. See the figure below. This function allows the
highest possible switching frequency at a specific operating point.
Higher switching frequency results in lower acoustic noise.
• In multimotor systems, do no disable (set
0 = – The function is disabled.
OFF
1 = – The switching frequency is limited according to the figure.
ON
12 kHz
2608 SLIP COMP RATIO
Sets gain for slip compensation (in %).
• A squirrel-cage motor slips under load. Increasing the frequency as
the motor torque increases compensates for the slip.
• Requires parameter 9904
0 – No slip compensation.
1...200 – Increasing slip compensation. 100% means full slip
compensation.
240
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MOTOR CTRL MODE
1 kHz 2 kHz
x x
x x
x x
SWITCHING FREQ
f
sw
0.75...37 kW
limit
45...110 kW
8 kHz
4 kHz
80 °C
MOTOR CTRL MODE
ACH550-01 User's Manual
Range
1, 2, 4, 8, 12 kHz
= 3 (
SCALAR
4 kHz 8 kHz 12 kHz*
x x
x x
x -
0=OFF, 1=ON
is limited when the drive internal
) the function.
OFF
Drive
temperature
90 °C 100 °C
0...200%
= 3 (
SCALAR
Parameter listing and descriptions
: ).
FREQ
x
-
-
T
: ).
FREQ