ABB DriveIT ACH550-01 User Manual page 240

Code Description
2607 SW FREQ CTRL
The switching frequency may be reduced if the ACH550 internal
temperature rises above 90 °C. See Figure. This function allows the
highest possible switching frequency to be used based on operating
conditions. Higher switching frequency results in lower acoustic noise.
0 = – The function is disabled.
OFF
1 = – The switching frequency is limited according to the figure.
ON
8 kHz
4 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.
236
Switching frequency limit
90 °C
ACH550 User's Manual
Range
0...200 kHz
ACS5550
Temperature
100 °C
0...200%
MOTOR CTRL MODE
Parameter listing and descriptions
= .
SCALAR SPEED