Controllers
Parameter manual
b maXX
BM5800
Document No.: 5.16029.03
Baumüller Nürnberg GmbH
462
3.7
Figure 120:
Example. Torque current limit "lsqLim" at the "Current mode" for the asynchronous motor (
138.1
bit 3 = 1).
a) Dependent of the field current (external total current limit is assumed).
b) Dependent of the external total current limit (field weakening is not assumed)
Speed-dependent torque current limit
A speed-dependent torque current limit correlating with the voltage limit is described in
detail in chapter
Particular case synchronous motor with interior permanent magnet (IPMSM)
The Iq current is not limited, but the total current is limited at IPMSM, because both cur-
rents contribute to the torque production. This limit current can be referred in
.
3.7.3.4 Feedforward
Decoupling feedforward
The decoupling feedforward compensates the influences on the field forming current to
the torque of the machine. Vice versa the influence of the torque forming current on the
field of the machine is compensated.
Electromagnetic force feedforward
Axis units
:
There is the possibility to feedforward the electromagnetic force for the current controller
of the torque forming current component. This feedforward can be switched off by enter-
5000_0355_rev01_int
LT-Imax
19.6
n [min ]
N
N
-1
t
[A]
isq
[A]
isq
[A]
N
107.7
-1
0
0
a)
b)
IsqLim
LT-Imax
19.6
LT-Imax
19.6
IsqLim
[A]
isqMax 19.8
isqMax 19.8
Isd-nom
isd-set
i drive
external
drive current limit
LT-Imax-act 19.5
