BONFIGLIOLI ACTIVE Applications Manual page 24

The maximum speed can be scaled via two parameters.
•
•
After this, the permitted maximum speed is modified as a function of the position of
the luffing jib.
The parameters
Max time LE
limit
load detection for the lifting crane.
In a crane with a luffing jib, the torque acting on the motor changes with the angle of
the luffing jib. In order not to overload the motor in the field weakening area, the
maximum permitted speed of the motor must therefore be adapted as a function of
the angle of the luffing jib.
These settings for the luffing jib are to be done via the parameters described below:
Desired Isq up
821.
22
22
I limit
Parameter 818
Current with which the load detection calculates the permitted maximum speed.
Pull-out torque at Fmax
Parameter
The pull-out torque relative to the rated torque of the asynchronous machine ad-
missible at the maximum frequency.
Mech. time constant
Pull-out torque at Fmax
815,
818 are parameterized in a way comparable with the described settings for the
Desired Isq down at FsR
819,
816
Turns/m Fm lower value LE
811, 812,
Speed switch-off limit
816,
Desired Isq down at Fmax
820 and
813,
I
817 and
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