F-24 Holding Time
Range:
Function:
00 s
*
[0 -
120 s]
Enter the time delay between the start
command and the time when the frequency
converter supplies the power to the motor.
This parameter is related to the start function
selected in
parameter F-25 Start Function
.
F-26 Motor Noise (Carrier Freq)
Option:
Function:
Select the carrier frequency. Changing the carrier
frequency can help reduce acoustic noise from
the motor.
NOTICE
Switching frequencies higher than 5.0 kHz
lead to automatic derating of the
maximum output of the frequency
converter.
[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]
12.0kHz
[13]
14.0 kHz
[14]
16.0kHz
F-27 Motor Tone Random
Option:
Function:
[0]
*
Off
No change of the acoustic motor switching noise.
[1]
On
Select to reduce the acoustic noise from the motor.
3.2.5 F-3# Fundamental Parameters 3
F-37 Adv. Switching Pattern
Option:
Function:
Select the switching pattern: 60° AVM or SFAVM.
[0]
*
60 AVM
[1]
SFAVM
F-38 Overmodulation
Option:
Function:
[0]
*
Off
Selects no overmodulation of the output voltage to
avoid torque ripple on the motor shaft.
[1]
On
The overmodulation function generates an extra
voltage of up to 8% of U
max
output voltage without
overmodulation. This extra voltage results in an extra
torque of 10–12% in the middle of the oversyncronous
range (from 0% at nominal speed, rising to approxi-
mately 12% at double nominal speed).
3.2.6 F-4# Fundamental Parameters
F-40 Torque Limiter (Driving)
Range:
Function:
110.0
%
*
[0 -
1000.0 %
]
Enter the maximum torque limit for motor
operation. The torque limit is active in the
speed range up to and including the nominal
. To protect the motor from reaching
the stalling torque, the default setting is 1.1 x
the rated motor torque (calculated value). See
also
parameter SP-25 Trip Delay at Torque Limit
for further details.
F-41 Torque Limiter (Braking)
Range:
Function:
100 %
*
[0 -
1000.0 %]
Enter the maximum torque limit for
generator-mode operation. The torque limit
is active in the speed range up to and
including the nominal motor speed
). Refer to
parameter SP-25 Trip Delay at Torque Limit
for
further details.
F-43 Current Limit
Range:
Function:
110.0
%
*
[1.0 -
1000.0 %]
Enter the current limit for motor and
generator operation. To protect the motor
from reaching the stalling torque, the
default setting is 1.1 x the rated motor
current (set in
3.2.7 F-5# Extended References
F-52 Minimum Reference
Range:
Function:
0.000
*
[-999999.999 -
par. F-53]
Enter the Minimum Reference. The
Minimum Reference is the lowest
Parameter Description
40
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DET-620D
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