8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
V/f control (VFCplus + encoder)
132 L Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010
Controller limitation
Max. intervention of the controller is limited by the controller limitation (C00971/1
).
The controller of every application can be limited individually.
We recommend to limit the max. intervention to twice the rated slip of the motor.
The rated slip is calculated as follows:
[5-11] Calculation of the rated slip
Slip limitation
Apart from the limitation of the slip regulator, the field frequency to be injected can be
limited by another limiting element, the so-called slip limitation (C00971/2
).
If the slip is e.g. limited to twice the rated slip of the motor, a stalling of the motor
during very dynamic processes can be avoided.
Motor stalling is caused by:
– a high overcurrent at very steep speed ramps
– very fast speed changes due to load, e.g. abrupt stopping of the drive due to an
encounter with a stop or a load that is not moving.
f
Schlupf
Nenn
Hz[] f
Nenn
Hz[]
n
Motor
Nenn
rpm[]
60
--------------------------------------------
p
Polpaarzahl
⋅
⎝⎠
⎛⎞
–=
Note!
A setting of C00971/1 = 0 Hz deactivates the slip regulator. In this case, the
structure of the operating mode corresponds to the structure of a V/f
characteristic control without feedback.
efesotomasyon.com - Lenze
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