6. Description of Parameters
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6
6.5.2 Torque Boost
The torque compensation function compensates for insufficient torque production at low
frequency.
Function Code Parameter Name Setting Range Default
F3-01
Torque boost ¿[HGWRUTXHERRVW
0.1% to 30%
Model
dependent
F3-02
Cut-off frequency of
torque boost
0.00 Hz to max. frequency 50.00 Hz
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But very large setting will result in motor overheat and AC drive overcurrent.
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F3-01.
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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
Current limit level
150%
Current limit during
acceleration
t
t
Output current
Current limit
during RUN
Current limit during
deceleration
Output frequency
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