(Pr. 828, Pr. 877 To Pr. 881) - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.3.4 Speed feed forward control, model adaptive speed control

(Pr. 828, Pr. 877 to Pr. 881)

By making parameter setting, select the speed feed forward control or model adaptive speed
control.
The speed feed forward control enhances the trackability of the motor in response to a speed
command change.
The model adaptive speed control enables individual adjustment of speed trackability and motor
disturbance torque response.
Pr.
Name
No.
828
Model speed control gain
Speed feed forward control/
877
model adaptive speed control
selection
878
Speed feed forward filter
Speed feed forward torque
879
limit
880
Load inertia ratio
881
Speed feed forward gain
NOTE 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 6-89.)
Speed
command
Fig. 6-19: Block diagram
FR-A700 EC
Speed control by real sensorless vector control, vector control
Sensorless Sensorless Sensorless
Initial Setting
Description
Value Range
Set the gain for model speed con-
60% 0–1000%
troller.
0 Normal speed control is exercised.
Speed feed forward control is exer-
1
0 cised.
Model adaptive speed control is
2
enabled.
Set the primary delay filter for the
speed feed forward result calculated
0 s 0–1s
using the speed command and load
inertia ratio.
Limits the maximum value of the
150% 0–400%
speed feed forward torque.
Set the load intertia ratio to the
7 0–200
motor.
Set the feed forward calculation
0% 0–1000%
result as a gain.
Load
inertia
ration
Speed feed
J × s
forward gain
Pr. 880
Pr. 881
Model adaptive speed control
Model speed
control gain
Speed control
P gain 1
Pr. 820
Actual speed
controller
Pr. 877
Vector Vector Vector
Parameters referred to
820
830
821
831
Pr. 879
Pr. 878
Speed feed
Speed feed
forward torque
forward filter
limit
Pr. 877
J
Torque factor
(J : Pr. 880)
Speed control
integral time 1
Pr. 821
Refer to
Section
Speed control P 6.3.3
gain 1
Speed control P 6.3.3
gain 2
Speed control inte- 6.3.3
gral time 1
Speed control inte- 6.3.3
gral time 2
1
J × s
Model speed
operation
iqcurrent M
control
3~
Speed estimator
I001511E
6 - 99