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Torque control by Real sensorless vector
control, vector control
4
PARAMETERS
4.5.4 Torque command (Pr. 803 to Pr. 806)
* This parameter allows its setting to be changed during the operation in any operation mode even if "0 (initial value) or 1" is set in Pr. 77 Parameter
write selection.
(1) Control block diagram
(2) Torque command (Pr. 804 = "0" (initial value)) by analog input (terminal 1)
Torque command source for torque control can be selected.
Parameter
Number
Name
Initial
Value
Setting
Range
Description
803
Constant power range
torque characteristic
selection
0
0
Constant motor output
command
Select the torque command in the
constant power region by torque
command setting.
1
Constant torque
command
804
Torque command
source selection
0
0
Torque command input
Speed limit
input method
Torque command by terminal1 analog input
(Refer to page 300)
As set in Pr. 807.1
Torque command by parameter setting (Pr. 805 or
Pr. 806) (-400% to 400%)
2
Torque command by pulse train input
(FR-A7AL)
3
Torque command with using CC-Link
communication (FR-A7NC/FR-A7NCE)
The Pr. 808 and
Pr. 809 settings
are speed limit.
4 12-bit/16-bit digital input (FR-A7AX) As set in Pr. 807.
5
Torque command with using CC-Link
communication (FR-A7NC/FR-A7NCE)
The Pr. 808 and
Pr. 809 settings
are speed limit.
6 As set in Pr. 807.
805 *
Torque command
value (RAM)
1000%
600 to
1400%
Writes the torque command value to the RAM.
On the assumption that 1000% is 0%, the torque command is set by
an offset from 1000%.
806 *
Torque command
value (RAM,EEPROM)
1000%
600 to
1400%
Writes the torque command value to the RAM and EEPROM.
On the assumption that 1000% is 0%, the torque command is set by
an offset from 1000%.
⋅ Torque command is given by voltage (current) input to
terminal 1.
⋅ When torque command is input from terminal 1, set "3 or
4" in Pr. 868 Terminal 1 function assignment.
⋅ Torque command by analog input can be calibrated using
calibration parameter C16 (Pr. 919) to C19 (Pr. 920) . (Refer
to page 300 )
Sensorless
Sensorless
Sensorless
Vector
Vector
Vector
Analog input
Parameter [Pr. 805, Pr. 806]
16-bit digital input (FR-A7AX)
0
1,3,5,6
4
2
[Pr. 804] Torque command
source selection
Speed limit input
+
-
Speed limit value
Speed estimated
value
Speed limit value
Speed estimated
value
Real sensorless vector control
Vector control
Speed control
(proportional control)
Speed estimator
Torque control
+
-
Motor
Encoder
Pulse train input (FR-A7AL)
Torque command
150%
-100%
(-10V)
0 100%
(+10V)
-150%
Terminal 1
analog input