Droop Control - Mitsubishi Electric 800 Series Instruction Manual

5.16.15

Droop control

This is a function to give droop characteristics to the speed by balancing the load in proportion with the load torque
during the Advanced magnetic flux vector control, Real sensorless vector control, vector control, and PM sensorless
vector control.
This is effective when balancing the load when using multiple inverters.
Pr. Name
286
Droop gain
G400
287 Droop filter time
G401 constant
288 Droop function
G402 activation selection
994
Droop break point gain
G403
995
Droop break point torque
G404
679
Second droop gain
G420
680 Second droop filter time
G421 constant
681 Second droop function
G422 activation selection
682 Second droop break
G423 point gain
683 Second droop break
G424 point torque
Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless Vector
Initial Setting
value range
0
0%
0.1% to 100%
0.3 s 0 to 1 s
0
1
2
10
0
11
20
21
22
0.1 to 100%
9999
9999
100% 0.1 to 100%
0 to 100%
9999
9999
0 to 1 s
9999
9999
0, 1, 2, 10, 11,
20, 21, 22
9999
9999
0.1 to 100%
9999
9999
0.1 to 100%
9999
9999
(G) Control parameters
Vector Vector PM PM PM
Description
Normal operation
Droop control enabled
Set the droop amount at the time of rated torque as % value
of the rated motor frequency.
Set the filter time constant to apply to the current for torque.
Without droop control during
acceleration/deceleration
(With 0 limit)
Continuous droop control
during operation
(With 0 limit)
Continuous droop control
during operation
(Without 0 limit)
Without droop control during
acceleration/deceleration
(With 0 limit)
Continuous droop control
during operation
(With 0 limit)
No droop control during
acceleration/deceleration
(with 0 limit)
Continuous droop control
during operation (with 0 limit)
Continuous droop control
during operation
(without 0 limit)
No droop control during
acceleration/deceleration
(with 0 limit)
No function
Set the torque when the droop amount is to be changed.
Refer to Pr.286
The first droop control setting
is applied to the operation.
Refer to Pr.287
The first droop control setting
is applied to the operation.
Refer to Pr.288
The first droop control setting
is applied to the operation.
Refer to Pr.994
The first droop control setting
is applied to the operation.
Refer to Pr.995
The first droop control setting
is applied to the operation.
PARAMETERS
Rated motor frequency is
the droop compensation
reference
Motor speed is the droop
compensation reference
The Pr.1121 setting is the
droop compensation
reference.
The Pr.1121 setting is the
droop compensation
reference.
Set the second droop
control.
The droop control is
enabled when the RT
signal is ON.
GROUP
G
621
5