Update notice
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 Description Def
26 MOTOR CONTROL
Motor control variables
2607 SWITCH FREQ CTRL Activates the switching frequency control. When active, the selection of
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.
1 = ON
ON (LOAD) 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.
2
2609 NOISE SMOOTHING 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.
0 = DISABLE
DISABLE Disabled 0
ENABLE Enabled 1
2619 DC STABILIZER 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.
0 = DISABLE
DISABLE Disabled 0
ENABLE Enabled 1
100°C 120°C
Drive
4 kHz
12 kHz
temperature
f
sw
limit
8 kHz
110°C
T
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