Unitronics UMI-B1 UL Series Operation Manual page 49

UMI-B1 UL Series Inverter
Function
Name
code
Pre-excitin
P03.25
g time
Weakeni
ng
P03.26
proportio
nal gain
Speed
display
P03.27 selection
of vector
control
P04 Group SVPWM control
V/F curve
P04.00
setting
Detailed instruction of parameters
Pre-activate the motor when the inverter
starts up. Build up a magnetic field inside the
inverter to improve the torque performance
during the starting process.
Setting time: 0.000–10.000s
0–8000
0: Display at the actual value
1: Display at the setting value
These function codes define the V/F curve of
UMI-B1 UL motor 1 to meet the need of
different loads.
0: Straight line V/F curve; applying to the
constant torque load
1: Multi-dots V/F curve
2: 1.3th power low torque V/F curve
3: 1.7th power low torque V/F curve
4: 2.0th power low torque V/F curve
Curves 2–4 apply to the torque loads such as
fans and water pumps. Users can adjust
according to the features of the loads to get
the best performance.
5: Customized V/F (V/F separation); in this
mode, V can be separated from f and f can be
adjusted through the frequency given channel
set by P00.06 or the voltage given channel
set by P04.27 to change the feature of the
curve.
Note: V in the below picture is the motor
b
rated voltage and f
b
frequency.
is the motor rated
47
Function parameters
Default
Modify
value
○
0.300s
○
1200
○
0
◎
0