BONFIGLIOLI ACTIVE Cube ACU 201-01 User Manual

12.1.2 Flux Formation
Field-oriented control in the configurations 2xx and 4xx are based on separate regu-
lation of the flux-forming and torque-forming current compo
nents. Upon startup, the
machine is magnetized and a current is impressed first. With the parameter Current
during flux formation
781 the magnetization current I
sd
is set, with the parameter
Maximum Flux-Formation Time 780 the maximum time for the current impression is
set.
The current impression is done until the reference value of the rated magnetizing
current is reached or the
Maximum Flux-Formation Time
780 is exceeded.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
780 Maximum Flux-Formation Time 1 ms 10000 ms
300 ms
1)
1000 ms
2)
50 ms
3)
781
Current during flux formation
0.1⋅I
FUN
ü ⋅ I
FUN
I
FUN
The factory setting of parameter Maximum Flux Formation Time 780 depends on
the setting of parameter Configuration 30:
1)
- configurations 1xx
2)
- configurations 2xx/4xx
3)
- configurations 6xx
The magnetizing current changes according to the rotor time constant of the motor.
By setting the parameters Max. Flux-Formation Time 780 and Min. Flux-Formation
Time
779 a constant flux formation time can be achieved. With parameter Min. Flux-
Formation Time
779 the minimum time for flux-
forming current can be set. This
enables a defined time between start signal and run-
up of the drive. For an optimum
setting of the parameters the rotor time constant, the required starting torque and
Current during Flux-Formation 781 have to be considered.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
779 Min. Flux-Formation Time 1 ms 10000 ms
10 ms
1)
50 ms
2)
The factory setting of parameter Min. Flux-Formation Time 779 depends on the
setting of parameter Configuration 30:
2)
- configurations 2xx/4xx
3)
- configurations 6xx
Min. Flux-Formation Time 779 = 0
Flux-forming ends when
− reference flux value is reached or
− after flux-formation time
Min. Flux-Formation Time 779 > 0
The current for flux-forming is impressed at
least for this time, even if the reference flux
value is reached.
Min. Flux-Formation Time 779 =
Max. Flux-Formation Time 780
Flux-forming ends after flux-formation time,
even if the reference flux value is not
reached.
Min. Flux-Formation Time 779 >
Max. Flux-Formation Time 780
Flux-forming ends after maximum flux-
formation time.
06/13 Operating Instructions ACU 137

BONFIGLIOLI ACTIVE Cube ACU 201-01 Specifications

General

Brand	BONFIGLIOLI
Model	ACTIVE Cube ACU 201-01
Category	Inverter
Language	English