Configuration
Function blocks
Internal motor control with vector control (MCTRL2)
8
8.2
8.2.7
8.2-61
EDSVF9333V EN 3.0-06/2005
199 %
M
100 %
80 %
n
N
2n
N
3n
N
n
0
1
2
9300vec153
Fig. 8.2-22 Torque characteristics when being evaluated with C0898
”Internallimitcharacteristic”whenC0898=1andMCTRL-HI-M-LIM=199%
Boost of the upper torque limit when MCTRL-HI-M-LIM = 199 % and
C0898 = 0
TorquecharacteristicwhenC0898=1andMCTRL-HI-M-LIM=80%
TorquecharacteristicwhenC0898=0andMCTRL-HI-M-LIM=80%
Evaluating torque limits using C0898
Code C0898 serves to evaluate the defined torque limits at the inputs
MCTRL-LO-M-LIM and MCTRL-HI-M-LIM using the function 1/f
act
. Thisserves
to reduce the torque.
Selection Code Description
Evaluation of the torque
limit in the field
weakening range
C0898 = 0 Lenze setting
The input signals at MCTRL-LO-M-LIM and
MCTRL-HI-M-LIM are evaluated with 1/f
act
.
C0898 = 1 An ”internal limit characteristic” which corresponds
to a maximum torque limit of ±199,99 % is evaluated
with 1/f
act
.
z The torque remains constant until the limit
characteristic is reached. This requires that the
controller provides a sufficient amount of current
and the motor is stable within the required speed
range.
z The input signals at MCTRL-LO-M-LIM and
MCTRL-HI-M-LIM are not evaluated with 1/f
act
.
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