Torque Control By Variable-Current Limiter Control - Mitsubishi Electric FR-A800 Series Instruction Manual

Pr.807 Speed limit selectionpage 287
C16 to C19 (torque setting voltage (current)
5.4.8

Torque control by variable-current limiter control

Vector Vector Vector
By changing the torque limit value for speed control, torque control can be performed.
Pr. Name
800 Control method
G200 selection
451 Second motor control
G300 method selection
• By adding the bias amount to the line speed (master speed) as the speed command value to saturate the speed controller
and changing the torque limit value, torque control can be performed.
• For a positive bias amount (the speed command value faster than the line speed), power driving is applied, and for a
negative bias amount (the speed command value slower than the line speed), regenerative driving is applied.
• Speed control is the basic control. For how to set the speed command and torque limit value, refer to the description of
speed control
Speed command value
Line speed
0
Torque limit value
(absolute value)
0
Generated torque
0
• Under speed control with Pr.800 = "0 or 100", when the speed command value is changed by an external force, the torque
limit is invalid during a change in the speed command value to adjust the internal speed command value to the actual
speed.
Under variable speed limiter control with Pr.800 = "6 or 106", the process to adjust the speed command value to the actual
speed is not performed, and thus the torque limit remains valid. This prevents torque from suddenly changing at a speed
change.
Speed command
value
Line speed
0
Torque limit value
(absolute value)
0
0
296
5. PARAMETERS
5.4 Torque control under Real sensorless vector control and Vector control
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bias/gain)page 510
Initial
value
6
106
0 to 5, 100 to 105
20 9, 109
10 to 12, 110 to 112
13 to 14, 113, 114
20
0 to 6, 10 to 14, 20,
100 to 106, 110 to 114
9999
9999
(page 235).
Power driving
Pr.800=0, 100
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Setting range
Vector control
Torque control under Vector control
(fast-response operation)
Vector control
Vector control test operation
Real sensorless vector control
(PM sensorless vector control)
V/F control (Advanced magnetic flux vector control, PM sensorless
vector control)
Select the control method for the second motor.
The second motor is enabled when the RT signal is ON.
The setting range is the same as that of Pr.800.
The setting value of Pr.800 is used.
Regenerative driving
Speed command
value
Line speed
0
Torque limit value
(absolute value)
0
Generated torque
0
Pr.800=6, 106
Description
Variable-current limiter
torque control)