BONFIGLIOLI Agile Operating Instructions Manual page 126

779 Minimum flux-formation time
The time required for flux-formation changes depending on the rotor time constant of the motor. By
setting the parameters
Maximum flux-formation time
constant flux-formation time can be reached. With the parameter
the minimum time for current impression is set. In this way, the time between a start signal and the
start of the drive can be defined. For an appropriate setting of the parameters, the rotor time con-
stant, the required starting torque and the parameter
considered.
Parameters
No. Description
779 Minimum flux-formation time
1)
30 = 410
Configuration
2)
30 = 610
Configuration
Minimum flux-formation time
Minimum flux-formation time
Minimum flux-formation time
=
Maximum flux-formation time
Minimum flux-formation time
<
Maximum flux-formation time
780 Maximum flux-formation time
781 Current during flux-formation
The field-orientated control is based on separate control of the flux-forming and the torque-forming
current component. Upon startup, the machine is magnetized and a current is impressed first. With
the parameter
Current during flux-formation
rameter
Maximum flux-formation time
The current impression is done until the reference value of the rated magnetizing current is reached
or the
Maximum flux-formation time
Parameters
No. Description
780 Maximum flux-formation time
781 Current during flux-formation
I : Nominal value of frequency inverter
FIN
o : Overload capacity of frequency inverter.
c
1)
30 = 110
Configuration
2)
30 = 410
Configuration
3)
30 = 610
Configuration
Agile
Operating Instructions
780 and
Min.
1 ms
779 = 0 Flux-formation is stopped as soon
− as the reference flux value or the
− maximum flux-formation time were reached
779 > 0 Current is impressed for flux-formation at least for this
time even if the reference flux value was reached.
779 Flux-formation is stopped after the set flux-formation time,
regardless of whether the reference flux value was
780
reached or not.
779 Flux-formation is stopped after the maximum flux-
formation time.
780
781 the magnetization current I
780 the maximum time for the current impression is set.
780 is exceeded.
Min.
1 ms
0.1⋅I
FIN
126
06/2013
Parameter descriptions
Minimum flux-formation time
Minimum flux-formation time
Current during flux-formation
Setting
Max. Fact. sett.
10 ms
10000 ms
50 ms
sd
Setting
Max. Fact. sett.
300 ms
10000 ms 1000 ms
50 ms
I
o ⋅I
c FIN FIN
Operational Behavior
779, a
779,
781 must be
1)
2)
is set, with the pa-
1)
2)
3)