I/F Start - Vacon 100 Applications Manual

vacon • 95
Code
U/f midpoint fre-
P3.1.4.4
P3.1.4.5 U/f midpoint voltage
Zero frequency volt-
P3.1.4.6
P3.1.4.7 Flying start options
Flying start scan cur-
P3.1.4.8
P3.1.4.9 Auto torque boost
Torque boost motor
P3.1.4.10
Torque boost genera-
P3.1.4.11
M3.1.4.12

I/f start

I/f Start
The
with constant current control. This is useful with high power motors in which the resistance is
low and the tuning of the U/f curve difficult.
Applying the I/f Start function may also prove useful in providing sufficient torque for the motor
at startup.
3
Table 38. Open loop settings
Parameter Min
0.00
quency
0.0
0.00
age
0
0.0
rent
0
0.0
gain
0.0
tor gain
I/f start
function is typically used with permanent magnet motors (PM) to start the motor
Max Unit Default
P3.1.4.2 Hz Varies
100.0 % 100.0
40.00 % Varies
1 0
100.0 % 45.0
1 0
100.0 % 100.0
100.0 % 0.0
This menu includes three parameters. See chapter below.
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Vacon 100 Application
ID Description
Provided that the program-
mable U/f curve has been
selected (par. P3.1.4.1) , this
604
parameter defines the mid-
dle point frequency of the
curve.
Provided that the program-
mable U/f curve has been
selected (par. P3.1.4.1), this
605
parameter defines the mid-
dle point voltage of the
curve.
This parameter defines the
zero frequency voltage of
606 the U/f curve. The default
value varies according to
unit size.
Checkbox selection:
B0 = Search shaft frequency
only from same direction as
frequency reference.
1590
B1 = Disable AC scanning
B4 = Use frequency refer-
ence for initial guess
B5 = Disable DC pulses
Defined in percentage of
1610
motor nominal current.
0=Disabled
109
1=Enabled
Scaling factor for motoring
665 side IR-compensation when
torque boost is used.
Scaling factor for generating
667 side IR-compensation when
torque boost is used.