Preventing Motor Stalling During Operation - Omron SYSDRIVE RV Series User Manual

Preventing Motor Stalling During Operation

Stall prevention during operation prevents the motor from stalling by automatically lowering the Inverter's
output frequency when a transient overload occurs while the motor is operating at a constant speed.
Stall prevention during operation is enabled only during V/f control. If the Inverter output current continues to
exceed the setting in parameter L3-06 for 100 ms or longer, the motor speed is reduced. Set whether to enable
or disable deceleration time using parameter L3-05. Set the deceleration time using C1-02 (Acceleration time
1) or C1-04 (Acceleration Time 2).
If the Inverter output current reaches the set value in L3-06 - 2% (Inverter Rated Output Current), the motor
will accelerate again at the frequency set or the acceleration time set.
Related Parameters
Param-
eter
Number
Stall pre-
vention
selection
during run-
ning
L3-05
StallP Run
Sel
Stall pre-
vention
level during
running
L3-06
StallP Run
Level
* C6-01= 1: 120%, C6-01= 0: 150%
-54
6
Name
Description
Display
0: Disabled (Runs as set.
With a heavy load, the
motor may stall.)
1: Deceleration time 1 (the
deceleration time for the
stall prevention function
is C1-02.)
2: Deceleration time 2 (the
deceleration time for the
stall prevention function
is C1-04.)
Effective when L3-05 is 1 or
2.
Set as a percentage of the
Inverter rated output current.
Usually setting is not neces-
sary.
The factory setting reduces
the set values when the
motor stalls.
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
0 to 2 1 No A
30 to
150%
No A
200
*
Regis-
V/f Open Flux
ter
with Loop Vec-
PG Vector tor
A No No 493H
A No No 494H