14-01 Switching Frequency
Option: Function:
[0] 1.0 kHz
[1] 1.5 kHz
[2] 2.0 kHz
[3] 2.5 kHz
[4] 3.0 kHz
[5] 3.5 kHz
[6] 4.0 kHz
[7] 5.0 kHz
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0 kHz
[13] 14.0 kHz
[14] 16.0 kHz
Select the inverter switching frequency. Changing the switching
frequency can help to reduce acoustic noise from the motor.
NB!
The output frequency value of the frequency con-
verter must never exceed 1/10 of the switching
frequency. When the motor is running, adjust the
switching frequency in par. 14-01 until the motor
is as noiseless as possible. See also par. 14-00 and
the section
Derating
.
NB!
Switching frequencies higher than 5.0 kHz lead to
automatic derating of the maximum output of the
frequency converter.
14-03 Overmodulation
Option: Function:
[0] Off
[1]
*
On Select
On
[1] to connect the overmodulation function for the
output voltage, to obtain an output voltage up to 15% greater
than the mains voltage.
Select
Off
[0] for no overmodulation of the output voltage, in
order to avoid torque ripple on the motor shaft.
14-04 PWM Random
Option: Function:
[0]
*
Off
2. Parameter Description VLT
®
AQUA Drive Programming Guide
144
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark
2
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