Instruction manual

83
 Preventing Motor from Stalling (Current Limit)
Automatically adjusts the output frequency and output current according to
the load to continue operation without stalling the motor.
• Stall prevention (current limit) level during acceleration (n093)
Sets the stall prevention (current limit) level during acceleration in units of
1%. (Inverter rated current = 100%)
Factory setting: 170%
A setting of 200% disables the stall prevention (current limit) during
acceleration. During acceleration, if the output current exceeds the value
set for n093, acceleration stops and frequency is maintained. When the
output current goes down to the value set for n093, acceleration starts.
*Stops the acceleration to prevent the motor
from stalling.
†Release width (hysteresis) of stall
prevention during accel is approx. 5% of
inverter rated current.
In the constant output area [output frequency > max. voltage output
frequency (n013)], following equation automatically decreases the stall
prevention (current limit) level during acceleration.
Stall prevention (current limit)
level during accel (n093)
Max. voltage output frequency (n013)
=

Stall prevention (current limit) level
during accel in constant output area
Output frequency
*
MOTOR CURRENT
n093
OUTPUT
FREQUENCY
TIME
TIME
*
Maximum voltage
output frequency
n013
Output frequency
Stall prevention during accel
(n093)
Stall prevention limit during accel
(40% of n093)
Stall prevention level
during acceleration