Danfoss FC 300

2.15.2. Inverter Switching, 14-0*
Parameters for configuring the inverter switching.
14-00 Switching Pattern
Option: Function:
[0] 60 AVM
[1]
*
SFAVM Select the switching pattern: 60° AVM or SFAVM.
14-01 Switching Frequency
Option: Function:
[1] 1.5 kHz
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. This feature may
be useful for applications such as grinding machines.
14-04 PWM Random
Option: Function:
[0]
*
Off
[1] On Select
On [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.
Select
Off [0] for no change to the acoustic motor switching
noise.
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: Function:
[0]
*
No function
[1] Controlled ramp-
down
[2] Controlled ramp-
down, trip
[3] Coasting
2. How to Programme FC 300 Programming Guide
172 MG.33.M2.02 - VLT
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