Configuration
7-15
48XX/49XXSHB0399
7.1.3.3 Field controller adjustment
Stop!
With field weakening operation, the motor speed can be so high that the motor will
be damaged. Do not exceed the maximum speed of the motor (see
manufacturer’s information).
48XX/49XX controllers include two control concepts for override field control.
( The ”V
ab
limitation” provides a very easy adjustment facility and is sufficient
for most applications.
( The control concept ”with separate V
ab
controller” offers a higher dynamic
response and accuracy. The adjustment of this system is however more
complicated.
The control method is selected under code C230.
Code Name
Possible settings
Lenze Selection Info
[C230*] Control
mode for
the
override
field control
0 -0- Limitation of the armature voltage
-1- Control of the armature voltage
Field weakening must be permitted under
C231.
Note!
If field weakening operation is not required, enter the rated field current (C083).
To avoid impermissibly high armature voltage at active loads, the field current is
reduced to its minium value (C231) by inhibiting the controller until n
act
=0 is
reached.
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