INVT Goodrive350 Series Operation Manual page 168

Goodrive350 series high-performance multifunction VFD
Function
Name
code
Torque boost of
P04.01
motor 1
Motor 1 torque
P04.02
boost cut-off
V/F frequency
P04.03
point 1 of motor 1
V/F voltage point
P04.04
1 of motor 1
P04.05 V/F frequency
Description
Output voltage
V
b
Linear type
Square type
In order to compensate for low-frequency torque
characteristics, you can make some boost
compensation to the output voltage. P04.01 is
relative to the maximum 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 the
b.
low-frequency torque characteristics of V/F.
You should 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 will cause
increased output current and motor heat-up, thus
degrading the efficiency.
When torque boost is set to 0.0%, the VFD is
automatic torque boost.
Torque boost cut-off threshold: Below this
frequency threshold, the torque boost is valid,
exceeding this threshold will nullify torque boost.
Output voltage
v
b
v
boost
Setting range of P04.01: 0.0%: (automatic) 0.1%–
10.0%
Setting range of P04.02: 0.0%–50.0%
When P04.00 =1 (multi-point V/F curve), you can
set V/F curve via P04.03–P04.08.
V/F curve is usually set according to the
characteristics of motor load.
Note: V1<V2<V3, f1<f2<f3. If low-frequency
-159-
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
f
b
Output
frequency
f
f
Cut-off
Function parameter list
Default
value
0.0%
b.
20.0%
0.00Hz
0.0%
0.00Hz
Modify
○
○
○
○
○