Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
661
of 820
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Figure 214: Control loop of U-f operation
4.8.12.1 Compensating controller for acceleration
In order to reach a dynamic operation via the U-f control, the compensating controller is
the option for the acceleration (bit
0...1 = 2 of Z166.1–). Thereby, different current limits
dependent of the maximum current can be defined for the motoric as well as the regen-
erative operation. If the current exceeds the set limit then the compensating controller is
activated for acceleration. It reduces the acceleration insofar that the maximum current is
always applied and the motor is operated with the highest possible acceleration.
Hereby in the regenerative operation additionally an operation with a voltage controller is
possible so that the converter can be operated without braking resistors. If the DC link
exceeds the set threshold the maximum current is reduced and consequently the torque
as well that brakes the motor.
A block diagram for the control is presented in ZFig. 215–.
NOTE!
At operation without overcurrent protection a too high current can be impressed in the
motor.
The controller switches off automatically if the maximum current for the controller is
reached.
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