Danfoss FC 300 Programming Manual page 172

2. How to Programme
2.15.2. Inverter Switching, 14-0*
Parameters for configuring the inverter switching.
2
14-00 Switching Pattern
Option:
[0]
[1]
14-01 Switching Frequency
Option:
[1]
14-03 Overmodulation
Option:
[0]
[1]
14-04 PWM Random
Option:
[0]
[1]
2.15.3. 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and handling. If a mains failure appears, the
frequency converter will try to continue in a controlled way until the power in the DC link has been
exhausted.
14-10 Mains Failure
Option:
[0]
[1]
[2]
[3]
172
60 AVM
* SFAVM
1.5 kHz
Off
*
On
* Off
On
* No function
Controlled ramp-
down
Controlled ramp-
down, trip
Coasting
MG.33.M2.02 - VLT
Function:
Select the switching pattern: 60° AVM or SFAVM.
Function:
Function:
On
Select [1] to connect the overmodulation function for the
output voltage, to obtain an output voltage up to 15% greater
than the mains voltage.
Off
Select [0] for no overmodulation of the output voltage, in
order to avoid torque ripple on the motor shaft. This feature may
be useful for applications such as grinding machines.
Function:
On
Select [1] to transform the acoustic motor switching noise
from a clear ring tone into a less discernable 'white' noise. This
is achieved by slightly and randomly altering the synchronism
of the pulse width modulated output phases.
Off
Select [0] for no change to the acoustic motor switching
noise.
Function:
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is a registered Danfoss trademark
FC 300 Programming Guide