SKS Sweden Bonfiglioli Vectron ACTIVE CUBE ACU 201 Series, Operating Instructions Manual

Page: 213 / 260

09/08
Operating Instructions ACU
211
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 se-
lected 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 11.2 “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%
16.5.5.1 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 0.1 ⋅ I
FUN
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 particular
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.
Operating Instructions ACU 211 09/08