6-6
6-3 Stall Prevention Function
A stall will occur if the motor cannot keep up with the rotating magnetic field on the motor
stator side when a large load is applied to the motor or a sudden acceleration/decelera-
tion is performed.
In the 3G3JV, stall prevention functions can be set independently for accelerating, run-
ning, and decelerating conditions.
n55
Stall Prevention Level during Deceleration Changes during
operation
No
Setting
range
0, 1 Unit of
setting
1 Default setting 0
Set Values
Value Description
0 Stall prevention during deceleration
1 No stall prevention during deceleration
• If 1 is set, the motor will be decelerated according to the set deceleration time. If the deceleration time
is too short, the main circuit may result in overvoltage.
• If 0 is set, the deceleration time will be automatically lengthened to prevent overvoltage.
Stall Prevention during Deceleration with n55 Set to 0
Output
frequency
Deceleration time is controlled
to prevent overvoltage.
Deceleration time (Set value)
Time
Advanced Operation Chapter 6
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