current will increase to
When the torque boost is set to 0.0%,
temperature and decrease the
Function Parameters
53
Function
code
Name
Description
Default
value
Modify
0: Straight line V/F curve; applying to the constant
torque load
1: Multi-dots V/F curve
2: 1.3
th
power low torque V/F curve
3: 1.7
th
power low torque V/F curve
4: 2.0
th
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 achieve a best
energy-saving effect.
5: Customized V/F (V/F separation); in this mode,
V can be separated from f and f can be adjusted
through the frequency reference channel set by
or the voltage reference channel set by
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 step-down V/F curve (1.3 order)
Torque step-down V/F curve (1.7 order)
Torque step-down V/F curve (2.0 order)
E04.01
Motor 1 torque
boost
Torque boost is used for the compensation of low
frequency torque.
output voltage V
b
.
defines the percentage of closing
frequency of manual torque to f
b
.
Torque boost should be selected according to the
load. The bigger the load is, the bigger the torque
is. Too big torque boost is inappropriate because
the motor will run with over magnetic, and the
add the
efficiency.
automatic torque boost.
Torque boost threshold: below this frequency
point, the torque boost is effective, but over this
frequency point, the torque boost is invalid.
0.0%
○
E04.02
Motor 1 torque
boost close
20.0%
○
