79
Fig.6-7 V/F curve setting diagram
Code
Name
Setting Range
F4.07
Slip compensation rate of V/F
0.0%
～
200.0%
【
0
】
F4.08
Slip compensation time of V/F
0.00~10.00S
【
0
】
This parameter can be compensated for on load application of V/F control motor speed
change,In order to improve the hardness of motor mechanical properties,100.0% is
corresponding to slip frequency rating of the motor.
Code
Name
Setting Range
F4.09
Torque boost
0.0:
（
auto
）
0.1
～
30.0
【
Depend on
model
】
F4.10
Torque boost cut-off
0.0
～
100.0%
【
50.0%
】
Torque boost will take effect when output frequency is less than cut-off frequency of
torque boost (F4.10).Torque boost can improve the torque performance of V/F control at
low speed.
The value of torque boost should be determined by the load.The heavier the load,the
larger the value is.If the boost is too large,the motor will run in exciting.The efficiency of
the motor decreases as the current of the inverter increases and the motor increase the
heat-releasing.
