User Manual
EM303B General Purpose Inverter
152
DC bus voltage
Time
Output
Frequency
Overvoltage
Protection
Upper Limit of
Overvoltage Stall
Lower Limit of
Overvoltage Stall
Enabled
Enabled
Figure 7-35 Overvoltage Stall Protection
FC-19 tens place=0 Dynamic brake disabled
Regardless how big the DC bus is, braking input power will not work.
FC-19 tens place=1 Dynamic brake enabled when inverter is running.
When inverter is running, DC bus voltage > overvoltage threshold, braking unit discharge
starts. When DC bus voltage drops, and DC bus voltage < overvoltage threshold, braking unit
shall be turned off immediately.
FC-19 tens place=2 Dynamic brake enabled when inverter is power-on.
If DC bus voltage > overvoltage threshold, braking unit discharge starts. When DC bus
voltage drops, and DC bus voltage < overvoltage threshold, braking unit shall be turned off.
FC-19 Thousands place=0Voltage stall protection is void.
When brake resistance is connected for quicker acceleration or deceleration, set this value.
FC-19 Thousands place=1Under voltage stall protection is effective.
When power supply fails or bus voltage drops abruptly, to keep running normally, the
inverter automatically decelerates as per proper deceleration time, and bus voltage gets
normal.
FC-19 Thousands place=2Over voltage stall protection is effective.
Whenbus voltage tends to be over voltage, output frequency is regulated by PID to protect
bus voltage quickly.
FC-19 Thousands place=3 Both under voltage stall and over voltage stall are effective.
When bus voltage is not reasonable, bus voltage protection is taken by corresponding
regulation.
8.13.15
Setting Overvoltage Protection Threshold
No.
Function
Range
Unit Default Type
FC-20
Voltage at Overvoltage Stall
120.00
～
140.00
%
130.00
〇
FC-21
Overcurrent Stall Proportion Gain IKp 0.00
～
100.00
0.10
〇
FC-22
Overvoltage Stall Proportion Gain VKp 0.00~100.00
3.00
〇
FC-23
Overvoltage Integral Time VTi
0.000~10.000
0.000: No
integration
S
0.300
〇
