Parameters: Special Functions - Danfoss FC 300 Design Manual

FC 300 Design Guide
Parameters: Special
"
Functions
14-** Special Functions
"
Parameter group for configuring special adjustable
frequency drive functions.
14-0* Inverter Switching
"
Parameters for configuring the inverter switching.
14-00 Switching Pattern
Option:
60 AVM
*
SFAVM
Function:
Select the switching pattern: 60° AVM or SFAVM.
14-01 Switching Frequency
Option:
1.0 kHz
1.5 kHz
2.0 kHz
2.5 kHz
3.0 kHz
3.5 kHz
4.0 kHz
5.0 kHz
6.0 kHz
7.0 kHz
8.0 kHz
10.0 kHz
12.0 kHz
14.0 kHz
16.0 kHz
Function:
Select the inverter switching frequency. Changing
the switching frequency can help to reduce
acoustic noise from the motor.
NOTE
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 frequency in
par. 4-11 until the motor is as noiseless as possible.
See also par. 14-00 and the section Derating.
default setting ( ) display text
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236
How to Program
*
Select On [1] to connect the overmodulation
function for the output voltage, to obtain an output
[0]
voltage up to 15% greater than the line voltage.
[1]
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.
[0]
*
[1]
[2]
[3]
[4]
Select On [1] to transform the acoustic motor
[5]
switching noise from a clear ring tone into a less
[6]
discernable 'white' noise. This is achieved by
[7]
slightly and randomly altering the synchronism of
[8]
the pulse width modulated output phases.
[9]
Select Off [0] for no change to the acoustic
[10]
motor switching noise.
[11]
[12]
14-1* Line Supply On/Off
"
[13]
Parameters for configuring line failure
[14]
monitoring and handling.
*
When a severe line imbalance is detected:
Select Trip [0] to trip the adjustable frequency drive;
Select Warning [1] to issue a warning; or
Select Disabled [2] for no action.
[ ] value for use in communication via serial communication port
MG.33.B6.22 - VLT is a registered Danfoss trademark
NOTE
Switching frequencies higher than 5.0 kHz
lead to automatic derating of the maximum
output of the frequency converter.
14-03 Overmodulation
Option:
Off
On
Function:
14-04 PWM Random
Option:
Off
On
Function:
14-12 Function at Line Imbalance
Option:
Trip
Warning
Disabled
Function:
[0]
[1]
[0]
[1]
[0]
[1]
[2]