ABB ACH550-01 User Manual page 246

ACH550-01 User's Manual
Code Description
2609 NOISE SMOOTHING
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
12 kHz.
0 =
DISABLE
1 = .
ENABLE
2619 DC STABILIZER
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 = – Disables DC stabilizer.
DISABLE
1 = – Enables DC stabilizer.
ENABLE
2625 OVERMODULATION
Enables or disables overmodulation. Disabling overmodulation can help
in some applications in field weakening area.
0 = – Disables overmodulation (default).
DISABLE
1 = – Enables overmodulation.
ENABLE
Parameter listing and descriptions
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. This parameter has no effect if parameter 2606 =
Range
0=DISABLE, 1=ENABLE
0=DISABLE, 1=ENABLE
0=DISABLE,
1=ENABLE
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