Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
477
of 820
4
4.7.2.4 Feedforward
Decoupling feedforward
The decoupling feedforward compensates the influences on the field forming current to
the torque of the machine. Vice versa the influence of the torque forming current on the
field of the machine is compensated.
Electromagnetic force feedforward
There is the possibility to feedforward the electromagnetic force for the current controller
of the torque forming current component. This feedforward can be switched off by enter
-
ing the value 0 in Z107.20– Ke factor. The actual Ke factor of the machine must be en-
tered in Z107.20– for a correct feedforward of the electromagnetic force.
IxR feedforward
The IxR feedforward compensates the voltage drop at the ohmic resistance of the stator
winding for both the field forming and the torque forming current controller. This feedfor
-
ward is generally deactivated and can be activated via parameter Z47.51–, if required.
Additionally it is possible to execute the feedforward based on the actual current values
or based on the current set values. This must be also set in parameter
Z47.51–.
For the used stator resistance the decisive factor can be either the parameter value
Z107.29– (Motor data) or the parameter value Z123.6– (measured resistance). It de-
pends on the parameterization of parameter Z123.10–.
4.7.2.5 Current controller adaption
Adaption of the current controller that can be programmed freely.
The current controller may become instable at motors with strong saturation. The current
controller adaption can be used to reach a constant control also at high currents.
Figure 157: Current controller adaption
Kp [%]
Iq [A]
Iq
2
Iq
1
Kp
Adapt
100%
5000_0229_rev01_int.cdr
To Next Page
Loading...
Need help?
General