ABB ACS150 User Manual page 20

18
NEW MOTOR CONTROL FUNCTIONALITY: Noise smoothing,
DC stabilizer and ON (LOAD) switching frequency control option
New parameters and parameter values (EN page 72)
Parameters
Index Name/Selection
26 MOTOR CONTROL
2607 SWITCH FREQ CTRL Activates the switching frequency control. When active, the selection of
ON (LOAD)
2609 NOISE SMOOTHING
DISABLE
ENABLE
2619 DC STABILIZER
DISABLE
ENABLE
Update notice
Description
Motor control variables
parameter 2606 SWITCHING FREQ is limited when the drive internal
temperature increases. See the figure below. This function allows the highest
possible switching frequency at a specific operation point.
Higher switching frequency results in lower acoustic noise, but higher internal
losses.
f
sw
limit
12 kHz
8 kHz
4 kHz
100°C
New value. Switching frequency can adapt to loading instead of limiting the
output current. This allows maximum loading with all switching frequency
selections. The drive automatically decreases the actual switching frequency
if loading is too high for the selected switching frequency.
Enables the noise smoothing function. Noise smoothing distributes the
acoustic motor noise over a range of frequencies instead of a single tonal
frequency resulting in lower peak noise intensity. A random component with
an average of 0 Hz is added to the switching frequency set by parameter
2606 SWITCHING FREQ.
Note: Parameter has no effect if parameter 2606 SWITCHING FREQ is set
to 16 kHz.
Disabled
Enabled
Enables or disables the DC voltage stabilizer. The DC stabilizer is used to
prevent possible voltage oscillations in the drive DC bus caused by motor
load or weak supply network. In case of voltage variation, the drive tunes the
frequency reference to stabilize the DC bus voltage and therefore the load
torque oscillation.
Disabled
Enabled
Drive
temperature
T
110°C 120°C
Def
1 = ON
2
0 = DISABLE
0
1
0 = DISABLE
0
1