
Parameter listing and descriptions 235
ACH550-01 User's Manual
2609 NOISE SMOOTHING 0=DISABLE, 1=ENABLE
This parameter introduces a random component to the switching
frequency. Noise smoothing distributes the acoustic motor noise over a
range of frequencies instead of a single tonal frequency resulting in
lower peak noise intensity. The random component has an average of
0 Hz. It is added to the switching frequency set by parameter
2606
SWITCHING FREQ. This parameter has no effect if parameter 2606 =
12 kHz.
0 =
DISABLE
1 = ENABLE.
2619 DC STABILIZER 0=DISABLE, 1=ENABLE
Enables or disables the DC voltage stabilizer. The DC stabilizer is used
in scalar control mode 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 – Disables DC stabilizer.
1 =
ENABLE – Enables DC stabilizer.
Code Description Range
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