YASKAWA VS MINI J7 User Manual download pdf (Page 69)

 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 (n56)

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 n56, acceleration stops and frequency is maintained. When the output

current goes down to the value set for n56, 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 (n11)], following equation automatically decreases the stall

prevention (current limit) level during acceleration.

MOTOR CURRENT

n56

OUTPUT

FREQUENCY

TIME

†

Stall prevention (current limit)

level during accel (n56)

Max. voltage output frequency (n11)



Stall prevention (current limit) level

during accel in constant output area

Output frequency

Max. voltage

output frequency

n11

Output frequency

Stall prevention during accel

(n56)

Stall prevention limit during accel

(40% of n56)

Stall prevention level

during acceleration

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YASKAWA VS MINI J7 User Manual Page 69