K&R GT600-4T132G User Manual page 151

6.5.2 Torque Boost
The torque compensation function compensates for insufficient torque production at low
frequency.
Function Code Parameter Name
F3-01 Torque boost
F3-02 Cut-off frequency of
torque boost
F3-01 compensates for insufficient torque production by boosting output voltage of the AC drive.
But very large setting will result in motor overheat and AC drive overcurrent.
●
On starting a heavy load and insufficient torque is experienced, increase the torque boost in
F3-01.
●
Decrease this parameter on light loads to avoid overheating the motor.
F3-02 sets the cutoff frequency. The torque boost function is disengaged when the output
frequency exceeds the cutoff point.
6.5.3 Current Limit Control
When output current exceeds the value set in F3-18 during acceleration, constant running or
deceleration, current limit is enabled and output frequency starts to drop. Until output current
recovers below the current limit level, output frequency starts to rise to target frequency again.
Figure 6-40 Current limit
Output current
150%
Current limit level
Output frequency
Setting Range
0.0%: No torque boost
0.1% to 30%
0.00 Hz to max. frequency
Current limit during
Current limit
acceleration
during RUN
6. Description of Parameters
Default
Model
dependent
50.00 Hz
Current limit during
deceleration
6
t
t
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