Baumuller b maXX BM5800 - Page 115

Description of the Software Modules and Parameters
Parameter manual b maXX BM5800
Document No.: 5.16029.03
115
of 814
3
l
sq k limit
138.18 = l
sq Max
Z19.8–.
The parameter 138.18 additionally is limited to 2 x max. total current of the drive Z19.6–.
Other torque current limits can also be set Z138.2–, Z138.3–, Z138.14–, Z138.15– and
the torque current limit caused by the torque limit Z138.22–.
Furthermore, other torque current limits are available: Z138.30–, Z114.5– and Z114.6–
. Furthermore, the motor-operating torque current can be disabled due to a power failure
(refer to
Z138.10– bit 1).
The strongest limit is effective. The definite upper and lower torque current limit is dis-
played in Z138.6– and Z138.7–.
See ZTorque Current Limiting– on page 458 and see also Z138.16–.
138.20 Max. torque actual value
The parameter presents the maximum internal torque of the motor M
max act
. which is
available due to the maximum torque current actual value, the updated Kt factor and the
field current. This value is calculated from the maximum torque current. If the maximum
current of the motor is limited by a monitoring (such as PU overload monitoring, refer to
"bit mask external total current limit"
Z138.8–), then this is regarded in this parameter.
with:
I
sq max
Maximum torque current: to controller FW 01.12 "Max. torque current" 
Z19.8–, 
from controller FW 01.13 "Max. torque current actual value" Z138.30–, in A
Flux
set
Magnetic flux set value in % Z146.13–
Kt
upd
Kt updated Z155.24–, in Nm/A
The exact correlation between the torque current and the torque is shown in the torque
monitoring (
ZFig. 133– on page 505).
138.21 Torque display
This parameter displays the torque in Nm, acting within the motor. This is the torque in
the air gap of the motor, which is calculated as follows:
with:
m
i
Torque display in Nm, 138.21
Kt
upd
Kt updated Z155.24–, in Nm/A
M
max act
I
sq max
Kt
upd
Flux
set
[%]=
m
i
Kt
upd
Flux
act
[%] I
sq act
=