Configuration
Parameter manual
b maXX
BM5800
Document No.: 5.16029.03
Baumüller Nürnberg GmbH
114
3.4
138.16
Speed threshold for breakdown torque limit
Operating speed n
K
that limits the maximum torque current by the breakdown limit l
k,Max
instead of the set max. torque current, l
sq,Max
as follows:
See
on page 458 and see also Factor for breakdown torque
.
138.17
Factor for breakdown torque
This factor is used to adjust the Ud voltage limit at the breakdown torque that is used to
calculate the "lsq limit breakdown torque" (
) and the threshold speed break-
down torque limit (
The lower the factor the lower the Ud voltage limit is and the greater the distance to the
breakdown torque.
If the breakdown torque factor is one then the Ud voltage limit at the breakdown torque is
1/
2-times of the phase voltage which is available.
See
138.18
Iq limit breakdown torque
The maximum torque current which is permitted due to the breakdown torque limit or the
breakdown torque controller. The breakdown torque limit calculates the maximum torque
current with the present electrical frequency and Ud voltage limit and the breakdown
torque controller limits the maximum torque current as soon as the required voltage ex-
ceeds the maximum permitted voltage.
The breakdown torque limit l
sq k limit
138.18
bit 2 and set by
the factor of the breakdown torque
. Furthermore this limit can be set by an
adaption mechanism automatically to reach the aimed Ud voltage limit in spite of moder-
ate discrepancies in the motor model. The adaption is not activated by default for reasons
of compatibility. If the breakdown torque limit is active (
bit 2 = 1) it is recom-
mended to activate the adaption as well (
bit 5 = 1).
If the breakdown torque controller is activate the breakdown torque limit does not act any-
more (
bit 4 = 1).
If the breakdown torque limit as well as the breakdown torque controller are deactivated
then
I
K Max
n
K
n
act
---------
I
sq Max
=
NOTE!
As the "Max. torque current"
dependent of the field weakening or the external
total current limit can change in the operating process, the threshold speed value of
138.16
can change, as well. Refer to the parameters
and
.
Содержание b maXX BM5800
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