SV600 Series User Manual 7 Parameter Description
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V1~V3: Voltage of point 1, point 2 and point 3
F1~F3: Frequeny of point 1, point 2 and point 3
Vb: Motor rated voltage
Fb: Motor rated frequency
Fig.7-4 Multi-point V/F curve setting
Function
code
Name
Setting range
Default
Property
P3-09
V/F slip compensation gain
0.0% ~ 200.0%
0.0%
☆
It can compensate the rotational speed slip of the asynchronous motor when the load of the motor
increases, stabilizing the motor speed in case of load change. 100% means that the compensation
is the rated motor slip when the motor bears rated load.
Function
code
Name
Setting range
Default
Property
P3-10
V/F over-excitation gain
0 ~ 200
64
☆
During deceleration of the inverter, over-excitation can restrain rise of the bus voltage, preventing
the overvoltage fault. The larger the over-excitation is, the better the restraining result is. Increase
the over-excitation gain if the inverter is liable to overvoltage error during deceleration. However,
too large over-excitation gain may lead to an increase in the output current.
Set the over-excitation gain to 0 in the applications where the inertia is small and the bus voltage
will not rise during motor deceleration or where there is a braking resistor.
Function
code
Name
Setting range
Default
Property
P3-11
V/F oscillation suppression gain
0 ~ 100
Depends on
model
☆
Set this parameter to 0 if the motor has no oscillation. Increase the value properly only when the
motor has obvious oscillation. The larger the value is, the better the oscillation suppression result
will be.
When the oscillation suppression function is enabled, the motor rated current and noload current
must be correct. Otherwise, the V/F oscillation suppression effect will not be satisfactory.