BONFIGLIOLI ACTIVE Cube ACU 401-25 User Manual

Parameter Reduction Factor Flux 778 reduces the standstill current if a stopping
behavior with the function “R->0, Stop” is selected. This stopping behavior is select-
ed if parameter
Operation Mode 630 is set to 2x (20 … 27 – „R-
>0, Stop, … “) or x2
(2, 12, 22, 32, 42, 52, 62, 72 – „ … , R->0, Stop“). The stopping behavior is de-
scribed in chapter
12.2 “Stopping Behavior”.
In these operation modes the setting of Reduction Factor Flux 778 becomes effec-
tive after the time of parameter
Holding Time 638
is elapsed. The resulting standstill
flux is calculated by multiplying Reference Flux 717 and Reduction Factor Flux 778
.
After a start command the drive starts immediately and the flux is increased up to
the reference value during the movement.
Because of the reduced flux the initially required torque-
forming current component
Isq is increased
. The time needed to achieve the reference flux can be influenced by
parameter Ref. Isd Upper Limit 743
which is set to the motor rated current after
setup.
Parameter
Settings
No. Description Min. Max. Fact. sett.
778 Reduction Factor Flux 20.00% 100.00% 100.00%
17.5.6.1 Limitation of field controller
The output signal of the field controller, the integrating and proportional components
are limited via parameter Ref. Isd upper limit 743 and parameter Ref. Isd lower lim-
it
744. The guided commissioning has set the parameter Ref. Isd upper limit 743
according to the parameter Rated current 371.
Parameter
Settings
No. Description Min. Max. Fact. sett.
743 Ref. Isd upper limit 0 ü ⋅ I
FUN
I
FUN
744 Ref. Isd lower limit - I
FUN
I
FUN
0.0
The limits of the field controller define not only the maximum current occurring, but
also the dynamic properties of the controller. The upper and lower limits restrict the
modification speed of the machine flux and the torque resulting from it. In particu
lar
the speed area above the nominal frequency should be observed for the modification
of the flux-
forming component. The upper limit is to be estimated from the product
of the set magnetizing current and the correction factor Reference flux 717
, although
the limit must not exceed the overload current of the drive.
238 Operating Instructions ACU 06/13

BONFIGLIOLI ACTIVE Cube ACU 401-25 Specifications

General

Brand	BONFIGLIOLI
Model	ACTIVE Cube ACU 401-25
Category	Inverter
Language	English