GD350A series high-performance multifunction VFD
-162-
Function
code
Name
Description
Default Modify
P04.01
Torque boost of
motor 1
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 maximum output
voltage V
b
.
P04.02 defines the percentage of cut-off
frequency of manual torque boost to the rated
motor frequency f
b
. Torque boost can improve
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, thus decreasing the
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;
exceeding this threshold will invalidate torque
boost.
Output voltage
Output
frequency
Cut-off
boost
b
f
f
v
v
Setting range of P04.01: 0.0%: (automatic);
0.1%–10.0%
Setting range of P04.02: 0.0%–50.0%
0.0%
○
P04.02
Torque boost cut-off
of motor 1
20.0%
○
P04.03
V/F frequency point
1 of motor 1
When P04.00=1 (multi-dot V/F curve), you can
set the V/F curve through P04.03–P04.08.
0.00Hz
○
