LS Industrial Systems SV-iV5 Series - Page 130

6. Function Description
6-62
Droop Control Calculation Example
z When Torque Ref is Positive:
Droop Ref speed = ( Torque Ref [%] － Droop Starting Torque[%] ) * Droop Quantity[%]
The result value becomes positive. Therefore, final speed ref value decreases and it should be,
(Speed Ref – Droop Ref speed)
＞ Droop low limit speed
Droop
Ref speed ＜ (Speed Ref – Droop low limit speed)
Therefore, positive limit is “
Speed Ref－ Droop Low Limit Speed”.
z When Torque Ref is Negative:
Droop Ref speed = －( Torque Ref [%] － Droop Starting Torque[%] ) * Droop Quantity [%]
The result value becomes negative. Therefore, final speed ref value increases and it should be,
(Speed Ref – Droop Ref speed)
＜ Max Motor speed
Droop
Ref speed ＞－(Max Motor speed － Speed Ref)
Therefore, negative limit is “
Max Motor speed － Speed Ref”.