Function Application
‑567‑
Para.
Function
De
fault
Value Range
Description
Contin
ued
Contin
ued
Con
tinu
ed
Continued 8: 1.8‑power V/f curve
Below the rated motor frequency, the
relationship between the output voltage
and the output frequency of the AC drive
changes according to the 1.8‑power
curve.
10: V/f complete separation mode
The output frequency of the AC drive is
independent from its output voltage. The
output frequency is determined by the
frequency source, and the output voltage
is determined by the voltage source for V/
f separation. This mode is typically
applicable to scenarios such as motor
torque control.
11: V/f half separation mode
In this mode, the voltage is proportional
to the frequency. The proportional
relationship can be set through the
voltage source, and the relationship
between the voltage and the frequency is
also related to the rated motor voltage
and the rated motor frequency in group 1.
If the voltage source input is X (0 to
‑100%), the relationship between the
voltage and the frequency is as follows: V/
f = 2 x X x (Rated motor voltage)/(Rated
motor frequency)
F3‑01 Torque
boost
Model
de
pend
ent
0.0 to 30.0
0.0%: Automatic
torque boost
The torque boost function is generally
applicable to the AC drive at low
frequency. In V/f control mode, the output
torque of the AC drive is proportional to
the frequency. Under the condition of low
frequency, the torque of the motor is very
low when the motor runs at low speed.
The output voltage of the AC drive can be
increased through this parameter, thereby
increasing the current and output torque.
Set this parameter to a moderate level to
avoid triggering the overload protection.
F3‑02
Cutoff
frequency
of torque
boost
50.00
Hz
0.00 Hz to the
maximum
frequency
When the running frequency reaches the
cutoff frequency of torque boost, the
torque boost function is disabled.
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