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VFC 3210
Stall overvoltage prevention
This function is used to prevent the frequency converter from overvoltage during
deceleration when the load is excessively heavy or the deceleration time is ex-
cessively short.
Code
Name
Stall overvoltage hysteresis
C0.24
voltage
C0.25 Overvoltage prevention mode
Stall overvoltage prevention
C0.26
level
With stall overvoltage prevention, the frequency converter detects the DC-bus
voltage and compares it with [C0.26] 'Stall overvoltage prevention level' during
deceleration:
[DC-bus voltage] > [C0.26]: The output frequency stops deceasing
●
[DC-bus voltage] < [C0.26] - [C0.24]: The output frequency resumes decreas-
●
ing
The typical behavior of stall overvoltage prevention is shown as the figure below:
Fig. 12-42: Stall overvoltage prevention during deceleration
If [C0.26] is too low, the deceleration process may fail.
DOK-RCON04-VFC3210****-IT01-EN-P
Setting range
0...100 V
0: Stall overvoltage protection en-
abled
1: Stall overvoltage protection en-
abled
1P 200 VAC: 300...390 V
3P 400 VAC: 600...785 V
Bosch Rexroth AG
Functions and Parameters
Default
Min.
1P: 30
1
3P: 50
1
–
385
0
770
Attri.
Stop
Stop
Stop
151/253
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