Version 1.0 09/08/2017
http://www.inorea.com
56
Code
Parameter name
Setting range
Factory default
Change
F4.00
V/F curve setting
Linear V/F curve
0
0
★
Multi-point V/F curve
1
Square V/F curve
2
1.25th power V/F curve
3
1.75th power V/F curve
4
0: Linear V/F curve Suitable for ordinary constant torque load.
1: multi-point V/F curve, suitable for dehydrator, centrifuge and other special loads
Any V/F relationship curves can be obtained by setting parameters F4.03 to F4.08.
2: power V/F curve Suitable for fans, pumps and centrifugal loads.
3 to 4: V/F relationship curve between linear V/F and square V/F.
F4.01
Torque boost
0.0%: (Automatic torque boost) 0.1% to
30.0%
0.0%
☆
F4.02
Torque boost cut-off
0.0% to 50.0% (relative to rated motor
frequency)
20.0%
★
Torque boost is mainly used in below cutoff frequency (F4.02), V/F curve after boosting is as shown below, the torque boost
can improve the characteristics of V/F frequency torque.
Select the amount of torque according to the appropriate load size, the large load can increase the boost, but the boost
value should not be set too large, the torque boost is too large, the motor will run over excitation, the inverter output
current increases, the motor heats up, and the efficiency is reduced.
When the torque boost is set to 0.0%, the inverter will perform automatic torque boost.
Torque boost cut-off point: below this frequency point, the torque boost is valid, conversely invalid.
Schematic diagram of manual torque boost voltage
F4.03
V/F frequency point 1
0.00Hz to F4.05
0.00Hz
★
F4.04
V/F voltage point 1
0.0% to 100.0%
0.0%
★
F4.05
V/F frequency point 2
F4.03 to F4.07
0.00Hz
★
Output
voltage
Vb
Vboost
f(cut-off)
fb
Output
frequency
Linear type
1.25th power down torque V/F curv
e
1.75th power down torque V/F curve
2.0th power down torque V/F curve
Output frequency (f)
Output
voltage (V)
fb
fb/3