KEB COMBIVERT F5-A Applications Manual page 247

This value may not be fallen below for the following reason:
A potential error in the position sensing leads to the magnetising current creating a torque in the field weake-
ning range. An error of 20° electrical causes an unwanted torque from the magnetising current of maximally:
M = sin(20°) x
dS.13
If this torque error cannot be compensated for due to the limiting characteristic, the drive becomes uncontrolla-
ble.
All other torque values must be selected higher accordingly.
Parameters dr.33, 40, 42, 44, 46 contain the maximum torque for the speeds in dr.39, 41, 43, 45, 47. Linear
interpolation between these points.
Fig. 7.8.3.2.2 Limiting characteristic
dr.33
dr.40
dr.42
dr.44
dr.46
The limiting characteristic is activated via dS.03 bit 1.
Bit Meaning
Field weakening characte-
1
ristic
© KEB, 2012-10 COMBIVERT F5-A, -E, -H
Magnetizing current limit (dS.13)
—————————————————
DSM rated current (dr.32)
programmed limiting
characteristic in the
inverter
(with safety distance)
usable range of the
application
dr.39 dr.41
dS.03: Current-/torque mode
Value
0: off
2: on
Torque display and -limiting
x DSM rated torque (dr.27)
measured limiting
characteristic
dr.43 dr.45
Explanation
Activation of the limiting characteristic
(defined by dr.33, dr.40...47)
dr.47
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