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5.3.3
Setting of the current limit (I
Code
Name
Possible settings
Lenze Selection
C022 I
limit
max
motor mode
C023 I
limit
max
generator mode
Function
The controllers are equipped with a current-limit control which determines the
dynamic response under load. The measured load is compared with the limit values
set under C022 for motor load and under C023 for generator load. If the current-limit
values are exceeded, the controller will change its dynamic response.
Adjustment
The acceleration and decleration time should be set short enough so that the drive can
follow the speed profile without reaching I
Drive characteristic
D During acceleration:
when reaching the limit
value
D During deceleration:
D When the load increases at constant speed:
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max
150
30
{1 %}
150
80
30
{1 %}
110
of the controller.
max
- Expansion of the acceleration ramp.
- Expansion of the deceleration ramp.
- When the motor-current limit value is reached:
Reduction of the field frequency to 10Hz.
- When the generator-current limit value is reached:
Increase the field frequency to the maximum frequency (C011).
- Stop the field-frequency change if the load falls below the limit value.
Commissioning
)
IMPORTANT
Info
UOMu_^MVMO
5-7
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