Lenze EVF9383 - Manual (Page 154)

Adjusting the motor
Current limits 6.6
6.6.5
l
6.6−14 EDSVF9383V EN 7.1−04/2012
6.6.5 Current limits
The controllers are provided with a current limit value control which
determines the dynamic behaviour under load. The resulting utilisation is
compared to the current limit value set under C0022 for motor load and
under C0023 for generator load. If the current limit values are exceeded, the
controller changes its dynamic behaviour.
Motor overload during acceleration:
The controller extends the acceleration ramp.
Generator overload during deceleration:
The controller extends the deceleration ramp.
With increasing load and constant speed:
ƒ When the current limit of the motor mode is reached:
– The controller reduces the speed up to 0 min −1 .
– The controller cancels the change of the speed if the load falls below
the limit value again.
ƒ When the current limit in the generator mode is reached:
– The controller increases the speed up to the maximum speed
(C0011).
– The controller cancels the change of the speed if the load falls below
the limit value again.
ƒ If a sudden load is built up at the motor shaft (e. g. the drive is blocked),
the overcurrent disconnection can respond (fault message OCx).
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0022 Imax current à 0 {0.1 A} − I
max
limit in motor mode
à depending on C0086
^
6.6−14
C0023 Imax gen. à 0 {0.1 A} − I
max
limit in generator mode
à depending on C0086
^
6.6−14
Description
Controller performance when
a limit value is reached