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158

z

This function is designed to balance the load in proportion to the load torque to provide the speed drooping 
characteristic.
This function is effective for balancing the load when using multiple inverters
z The speed command is varied according to the magnitude of the motor load (load meter of the inverter). 

The drooping amount at the rated torque is set by the droop gain as a percentage using the rated speed as 
a reference.

z Droop control is made valid when Pr. 286 is other than "0".

286

Droop gain

0

%

0 to 100

%

The drooping amount at the rated torque is set by the droop gain 
as a percentage using the rated speed as a reference. 
When the setting value is "0", the function will be invalid.

287

Droop filter time 
constant

0.3s

0.00 to 

1.00s

Set the time constant of the primary delay filter applied to the 
torque current.

288

Droop function 
activation selection

0

0

Droop control is not exercised during acceleration/deceleration.

1

Droop control is always exercised during operation.

 

(with zero limit)

2

Droop control is always exercised during operation

 

(without zero limit)

0

Droop control is not excercised during acceleration/deceleration. Note that the speed command after 
droop is stopped at 0r/min if the speed command after droop is negative.

1

Droop control is always excercised during operation. Note that, during vector control with encoder, the 
speed command after droop is stopped at 0r/min if the speed command after droop is negative.

2

Droop control is always excercised during operation. Note that the speed command after droop is not 
stopped at 0r/min even if the speed command after droop is negative.

speed

Droop compensation 
speed

=

Amount of torque current after 

filtering

×

Rated speed × droop gain

100% torque amount current

100

Droop compensation speed

Rat

ed

 sp

eed

Speed

100%

Droop gain

0

Torque

-100%