Mitsubishi Electric FR-A720-0.4K Instruction Manual page 517

5 Break point setting for droop control (Pr.994, Pr.995)
Magnetic flux Magnetic flux Magnetic flux Sensorless
Sensorless Sensorless
Set Pr.994 and Pr.995 to have a break point on a droop compensation frequency line. Setting a break point
allows the inverter to raise the droop compensation frequency for light-load (no load) operation without
raising it for heavy-load operation.
Parameter
Number
994 Droop break point gain
995 Droop break point torque
Rated frequency
CAUTION
The droop break point function is disabled when any of the following conditions is met. (Linear compensation by Pr.286 is
performed.)
 Pr.995 = "100% (initial value)"
 Pr.286 < Pr.994
 Pr.994  Pr.995  Pr.286 / 100%
Vector Vector Vector
P M P M P M
Initial
Name
Value
9999
100%
Increased amount of the
droop compensation
frequency
Droop compensation
frequency
-100%
Setting Range
Set the changing droop amount as a percentage
0.1 to 100%
value of the rated motor frequency.
9999 No function
Set the torque where the droop amount is
0.1 to 100%
changed.
Frequency
Droop break point gain
(Pr.994)
Droop break point torque
(Pr.995)
0
20/24
Description
Droop gain
(Pr.286)
100% Torque
BCN-C22005-634