2.13 Main Menu - Special Functions -Group 14
2.13.1 14-** Special Functions
Parameter group for configuring special frequency converter functions.
2.13.2 Inverter Switching 14-0*
Parameters for configuring the inverter switching.
14-00 Switching Pattern
Option:
Function:
Select the switching pattern: 60° AVM or SFAVM.
[0] *
60 AVM
[1]
SFAVM
14-01 Switching Frequency
Option:
Function:
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 converter must never exceed 1/10
of the switching frequency. When the motor is running, adjust the switching fre-
quency in par.14-01
until the motor is as noiseless as
possible. See also par.14-00
and the section
Derating
.
[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
14-03 Overmodulation
Option:
Function:
[0]
Off
Selects no over-modulation of the output voltage in order to avoid torque ripple on the motor shaft.
[1] *
On
The over-modulation function generates an extra voltage of up-to 8% of U
max
output voltage without
over-modulation, which results in an extra torque of 10-12% in the middle of the over-syncronous
range (from 0% at nominal speed rising to approximately 12% at double nominal speed).
2 Parameter Description
VLT
®
AQUA Drive Programming Guide
134
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
2