Torque Control By Variable-Current Limiter Control - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
5.4.8

Torque control by variable-current limiter control

By changing the torque limit value for speed control, torque control can be performed.
Pr.
800
G200
451
G300
● 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 per-
formed.
● 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 speed control (page 174).
Fig. 5-55:
● Under speed control with Pr. 800 ="0 or100", when the speed command value is changed by an
external force, the torque limit is invalid at a change in the speed command value to adjust the
internal speed command value to the actual speed.
FR-A800
Torque control under Real sensorless vector control and vector control
Name
Control method selection
Second motor control
method selection
Speed command value
Line speed
0
Torque limit value
(absolute value)
0
Generated torque
0
Effect of speed command value and torque limit value on generated torque
Initial Setting
Description
value range
6 Vector control
Vector control
106
(fast-response operation)
0 to 5, 100 to
Vector control
105
9, 109 Vector control test operation
20
10 to 12, 100
Real sensorless vector control
to 112
13, 14, 113,
PM sensorless vector control
114
V/F control (Advanced magnetic flux vector control,
20
PM sensorless vector control)
Select the control method for the second motor.
0 to 6,
The second motor is enabled when the RT signal is
10 to 14, 20,
ON.
100 to 106,
9999
110 to 114
The setting range is the same as that of Pr. 800.
9999 The Pr. 800 setting is used.
Power driving
Vector Vector Vector
Variable-current limiter
torque control
Regenerative driving
II002822E
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