Group 26: Motor Control - ABB ACS 400 User Manual

Group 26: Motor Control

Code Description
2603 IR COMPENSATION
IR compensation voltage at 0 Hz.
Note! IR compensation should be
kept as low as possible to prevent
overheating. Refer to Table 15.
2604 IR COMP RANGE
IR compensation range. Defines frequency after which IR compensation is 0 V.
2605 LOW NOISE
Motor acoustical noise option.
0 =
OFF
Standard (switching frequency 4 kHz).
1 = (1)
ON
Low noise (switching frequency 8 kHz).
Note! When the low noise setting is used, the maximum loadability of the ACS 400 is I
temperature or 0.8 * I
2606 U/f RATIO
U/f ratio below field weakening point.
1 =
LINEAR
2 =
SQUARE
Linear is preferred for constant torque applications, Square for centrifugal pump and fan applications.
(Square is more silent for most operating frequencies.)
2607 SLIP COMP RATIO
A squirrel-cage motor will slip under load. The slip can be compensated by increasing the frequency as the
motor torque increases. This parameter defines the gain for the slip. 100 % means full slip compensation;
0 % means no slip compensation.
Figure 44 Operation of IR compensation
84
Table 15
400 V Units
P / kW
N
IR comp / V
at 40 °C.
2
U (%)
IR compensation
U
N
Typical IR compensation values.
3 7.5 15
21 18 15
IR compensation range
No compensation
f (Hz)
Field
weakening
point
22 37
12 10
at 30 °C ambient
2
ACS 400 User's Manual