Unitronics UMI-B1 UL Series - Page 49

UMI-B1 UL Series Inverter Function parameters
47
Function
code
Name
Detailed instruction of parameters
Default
value
Modify
P03.25
Pre-excitin
g time
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
0.300s
○
P03.26
Weakeni
ng
proportio
nal gain
0–8000
1200
○
P03.27
Speed
display
selection
of vector
control
0: Display at the actual value
1: Display at the setting value
0
○
P04 Group SVPWM control
P04.00
V/F curve
setting
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
b
in the below picture is the motor
rated voltage and f
b
is the motor rated
frequency.
0
◎