17.5.2 Extended Current Controller
For some machines it might be necessary, that for different current ranges different
Amplification factors must be set up.
The following classification applies:
Current < Current below P. 777 is in effect 776
Amplification low Current 777
Current above P. 700 is in effect 775 > Current
> Current below P. 700 is in effect 757 Amplification 700
Current > Current above P. 759 is in effect 758 Amplification high Cur-
759
By default, the parameters are pre-assigned so that the parameters are not active
and only the basic parameters are active.
757 Current below P. 700 is in effect 0.00 o * I
o * I
758 Current above P. 759 is in effect 0.00 o * I
o * I
759 Amplification high Current 0.00 8.00 0.00
Current above P. 700 is in effect
Current below P. 777 is in effect
Amplification low Current
FIN
= Nominal Output current of Frequency inverter
o: Overload capability of Frequency inverter
The motor autotuning changes the parameters.
17.5.3 Torque Controller
The torque-controlled configurations 230, 430, 530 and 630 can be used for sensor-
less torque control alternative to the speed control. The torque control is usable
above the Frequency Limit 624. Below the Frequency Limit 624 the current impres-
sion is active with the current reference frequency as reference value. In this case
the torque is not controlled, but results depending on the load and the Starting cur-
rent
623. To achieve a starting in torque control
, the reference frequency should be
set higher than Frequency Limit 624. This is guaranteed in example by setting Min-
imum frequency
418 > Frequency Limit 624.
f <
Frequency Limit 624: Current impression
f ≥
Frequency Limit 624: Direct Torque Control
The Frequency Limit 624 is set automatically during the motor setup.
06/13 Operating Instructions ACU 229
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