Parameters: 14-** Special Functions; Switching Pattern; Switching Frequency; Overmodulation - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions
13-98 Alert Warning Word
Range:
0 [0 - 4294967295 ] Shows the warning word of a user-
*
3 3
13-99 Alert Status Word
Range:
0 [0 - 4294967295 ] Shows the status word of a user-defined
*

3.14 Parameters: 14-** Special Functions

14-00 Switching Pattern

Option:
[0] 60 AVM
[1] SFAVM
*

14-01 Switching Frequency

Select the frequency converter switching frequency. Changing
the switching frequency reduces acoustic noise from the motor.
Default values depend on power size.
Option:
[0] 1.0 kHz
[1] 1.5 kHz
[2] 2.0 kHz
[3] 2.5 kHz
[4] 3.0 kHz
[5] 3.5 kHz
190
Function:
defined alarm in hex code.
Function:
alarm in hex code.
Function:
Select the switching pattern: 60° AVM or SFAVM.
NOTICE
The frequency converter may adjust the
switching pattern automatically to avoid a
trip.
Function:
NOTICE
The output frequency value of the
frequency converter must never exceed
10% of the switching frequency. When the
motor is running, adjust the switching
frequency in parameter 14-01 Switching
Frequency to minimize motor noise.
NOTICE
To avoid a trip, the frequency converter
can adjust the switching frequency
automatically.
Default switching frequency for 355–1200 kW
[500–1600 hp], 690 V.
Default switching frequency for 250–800 kW [350–
1075 hp], 400 V, and 37–315 kW [50–450 hp], 690
V.
Default switching frequency for 18.5–37 kW [25–
50 hp], 200 V, and 37–200 kW [50–300 hp], 400 V.
Danfoss A/S © 10/2018 All rights reserved.
®
VLT AutomationDrive FC 301/302
14-01 Switching Frequency
Select the frequency converter switching frequency. Changing
the switching frequency reduces acoustic noise from the motor.
Default values depend on power size.
Option:
[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] 12.0kHz
[13] 14.0 kHz
[14] 16.0kHz

14-03 Overmodulation

Option: Function:
[0] Off Select [0] Off for no overmodulation of the output
[1] On
14-04 Acoustic Noise Reduction
Option:
[0] Off No change of the acoustic motor switching noise.
*
[1] On Select to reduce the acoustic noise from the motor.
14-06 Dead Time Compensation
Option:
[0]
[1]
*
Function:
Default switching frequency for 5.5–15 kW [7.5–20
hp], 200 V, and 11–30 kW [15-40], 400 V.
Default switching frequency for 0.25–3.7 kW
[0.34–5 hp], 200 V, and 0.37–7.5 kW [0.5–10 hp],
400 V.
voltage to avoid torque ripple on the motor shaft. This
feature may be useful for applications such as grinding
machines.
Select [1] On to enable the overmodulation function for
the output voltage. This is the right option when it is
required that the output voltage is higher than 95% of
the input voltage (typically when running over-synchro-
nously). The output voltage is increased according to
the degree of overmodulation.
NOTICE
Overmodulation leads to increased torque
ripple as harmonics increase.
Control in flux control principle provides an output
current of up to 98% of the input current, regardless of
parameter 14-03 Overmodulation.
Function:
Function:
Off No compensation.
On Activates dead-time compensation.
MG33MP02