Speed Feed Forward Control, Model Adaptive Speed Control (Pr. 828, Pr. 877 To Pr. 881) - Mitsubishi Electric FR-A720-0.4K Instruction Manual
Fr-a700 series
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Also See for FR-A720-0.4K:
- Instruction manual (523 pages) ,
- Instruction manual (472 pages) ,
- Instruction manual (235 pages)
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Speed control by real sensorless vector
control, vector control
4.4.5
Speed feed forward control, model adaptive speed control (Pr. 828, Pr. 877 to Pr.
881)
Sensorless
Sensorless
Sensorless
Pr.827
page 140
By making parameter setting, select the speed feed forward control or model adaptive speed control.
Pr.830
page 103
The speed feed forward control enhances the trackability of the motor in response to a speed command
Pr.875
change.
page264
The model adaptive speed control enables individual adjustment of speed trackability and motor disturbance
Pr.882
torque response.
page 363
Parameter
Number
Model speed control
828
gain
Speed feed forward
control/model
877
adaptive speed
control selection
Speed feed forward
878
filter
Speed feed forward
879
torque limit
880
Load inertia ratio
Speed feed forward
881
gain
POINT
When model adaptive speed control is selected, the data obtained from easy gain tuning is used for Pr. 828 Model
speed control gain. Perform easy gain tuning also (simultaneously). (Refer to page 104)
1
2
2
Speed
command
0
1
110
Vector
Vector
Vector
Name
Initial Value
150%
7 times
Load inertia ratio
Speed feed
J s
forward gain
Pr.880
Model adaptive speed control
Model speed
+
control gain
Pr.828
-
+
-
Pr.877
Setting Range
60%
0 to 1000%
0
1
0
2
0s
0 to 1s
0 to 400%
0 to 200 times
0%
0 to 1000%
Pr.879
Speed feed
Speed feed
forward torque
forward filter
limit
Pr.881
J
Torque factor
(J : Pr.880)
Speed control
P gain 1
Pr.820
Speed control
Actual speed
integral time 1
controller
Pr.821
Description
Set the gain for model speed controller.
Normal speed control is exercised.
Speed feed forward control is exercised.
Model adaptive speed control is enabled.
Set the primary delay filter for the speed feed
forward result calculated using the speed
command and load inertia ratio.
Limits the maximum value of the speed feed
forward torque.
Set the load intertia ratio to the motor.
Set the feed forward calculation result as a gain.
Pr.878
Pr.877
Model speed
1
2
+
+
iq current
control
+
Speed estimator
1
J s
operation
IM
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