IACDRIVE I5000 Series Operation Manual page 77

Over-voltage
PB.05 stall protection
During deceleration, the motor's decelerating rate may be lower than that of inverter's output
frequency due to the load inertia. At this time, the motor will feed the energy back to the inverter,
resulting in DC bus voltage rise. If no measures taken, the inverter will trip due to over voltage.
During deceleration, the inverter detects DC bus voltage and compares it with over-voltage stall
protection point. If DC bus voltage exceeds PB.05, the inverter will stop reducing its output
frequency. When DC bus voltage become lower than PB.05, the deceleration continues, as
shown in following figure.
Function
Name
Code
Auto current
PB.06
limiting threshold
Frequency
decrease rate
PB.07
when current
limiting
Auto current limiting is used to limit the current of inverter smaller than the value determined
by PB.06 in real time. Therefore the inverter will not trip due to surge over-current. This
function is especially useful for the applications with big load inertia or step change of load.
110~150%
point
Figure 6.28 Over-voltage stall function.
Description
50~200%
0.00~100.00Hz/s
110~150
Setting Range
50~200
0.00~100.00
75
380V:130%
220V:120%
Factory Setting
G Model: 160%
P Model: 120%
10.00Hz/s