INVT Goodrive350-19 Series Operation Manual page 157

Goodrive350-19 series VFD for crane
points starting from (0Hz, 0V) and ending at (motor fundamental frequency, motor rated voltage).
During setting, follow the rule: 0 ≤ f1 ≤ f2 ≤ f3 ≤ Motor fundamental frequency, and, 0 ≤ V1 ≤ V2 ≤ V3 ≤
Motor rated voltage
The VFD provides dedicated function codes for the space voltage control mode. You can improve the
space voltage control performance by means of setting.
1. Torque boost
The torque boost function can effectively compensate for the low-speed torque performance in space
voltage control. Automatic torque boost has been set by default, which enables the VFD to adjust the
torque boost value based on actual load conditions.
Note:

Torque boost takes effect only at the torque boost cut-off frequency.

If torque boost is too large, the motor may encounter low-frequency vibration or overcurrent. If
such a situation occurs, reduce the torque boost value.
2. Energy-saving run
During actual running, the VFD can search for the max. efficiency point to keep running in the most
efficient state to save energy.
Note:

This function is generally used in light load or no-load cases.

This function is no applicable to the cases where sudden load changes often occur.
Output voltage
100 % V
b
V3
V2
V1
f1
Output voltage V
boost
cut-off
Output frequency
f
f2
f3
b
Output frequency f
-145-
Basic operation guidelines
Hz