Instruction manual

PARAMETERS
163
z
zz
z Droop control (Pr. 286, Pr. 287)
Pr. 286 "Droop gain"
Pr. 287 "Droop filter time constant"
This function balances the load in proportion to the load torque with or without PLG, and provides speed
drooping characteristics.
This is effective in balancing the load when using multiple inverters.
z The output frequency is varied according to the amount of torque current during unbalanced flux vector
control and vector control.
The drooping amount at the rated torque is set by the droop gain as a percentage using the rated
frequency as a reference.
Droop compensation frequency =
Amount of torque current after filtering
Rated current
×
Rated frequency × droop gain
100
z Confirm the following items when using the droop control.
1. This function is valid when Pr. 286 ≠ "0" during unbalanced flux vector and vector control.
2. This function is valid when the operation state is constant speed operation.
3. The upper limit of the droop compensation frequency is 120Hz.
4. The rated current follows the value set in Pr. 9 "Motor rated current".
Parameter No. Name Setting range Min. setting unit Factory setting
286 Droop gain 0 to 100% 0.01% 0%
287 Droop filter time constant 0.00 to 1.00s 0.01s 0.3s
Droop gain
Torque
100%
Droop compensation frequency
Frequency
<Setting>
Refer to the following table and set each parameter.
Parameter No. Details
286
Set the drooping amount at the rated torque as a percentage with respect to the rated frequency.
When the setting value is "0", the function will be invalid (no droop control).
287 Set the time constant of the filter applied on the torque amount current.
Pr. 9 "electronic overcurrent protection"
Pr. 71 "applied motor"
Pr. 84 "rated motor frequency"
Related parameters
4