TECHTOP TD20 Series - Page 43

TD20 Series VFD Function Parameters
-41-
Function
code
Name
Detailed instruction of parameters
Default
value
Modify
limit
dependent on the site situation.
Setting range: 0.0–120.0%
P03.25
Pre-exciting
time
Pre-activate the motor when the VFD starts up. Build up
a magnetic field inside the VFD to improve the torque
performance during the starting process.
Setting time: 0.000–10.000s
0.300s
○
P03.26
Weakening
proportional
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 TD20
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.
Output voltage
Output frequency
Linear type
Square type
Torque-stepdown characteristics V/F curve (1.3 order)
Torque-stepdown characteristics V/F curve (1.7 order)
Torque-stepdown characteristics V/F curve (2.0 order)
V
b
f
b
0
◎
P04.01
Torque boost
Torque boost to the output voltage for the features of low
0.0%
○