INVT Goodrive350 Series Operation Manual page 164

Goodrive350 IP55 High-ingress Protection Series VFD
Function
Name
code
Torque boost of
P04.01
motor 1
Torque boost cut-off
P04.02
of motor 1
Description
4: Torque-down V/F curve (power of 2.0)
Curves 2 – 4 are applicable to the torque loads
such as fans and water pumps. You can adjust
according to the characteristics of the loads to
achieve 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 setting channel
specified by P00.06
channel specified by
characteristics of the curve.
Note: In the following figure, V
rated voltage and f
frequency.
Output voltage
V
b
Linear type
Square type
f
b
In order to compensate for low-frequency
torque characteristics, you can make some
boost compensation for the output voltage.
P04.01 is relative to the max. output voltage V
P04.02 defines the percentage of cut-off
frequency of manual torque boost to the rated
motor frequency f . Torque boost can improve
b
the low-frequency torque characteristics of V/F.
You need to select torque boost based on the
load. For example, larger load requires larger
torque boost, however, if the torque boost is too
large, the motor will run at over-excitation,
which may cause increased output current and
motor overheating,
efficiency.
When torque boost is set to 0.0%, the VFD
uses automatic torque boost.
Torque boost cut-off threshold: Below this
frequency threshold, torque boost is valid;
-146-
or the voltage setting
P04.27 to change the
is the motor
b
is the motor rated
b
Torque step-down V/F curve (power of 1.3)
Torque step-down V/F curve (power of 1.7)
Torque step-down V/F curve (power of 2.0)
Output frequency
thus decreasing
Function parameter list
Default Modify
○
0.0%
.
b
○
20.0%
the