Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 355 / 1218

Parameters Torque control under Real sensorless vector control and vector control
FR-A800 5 - 153
5.4.8 Torque control by variable-current limiter control
By changing the torque limit value for speed control, torque control can be performed.
●
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).
●
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.
Pr. Name
Initial
value
Setting
range
Description
800
G200
Control method selection 20
6 Vector control
Variable-current limiter
torque control
106
Vector control
(fast-response operation)
0 to 5, 100 to
105
Vector control
9, 109 Vector control test operation
10 to 12, 100
to 112
Real sensorless vector control
13, 14, 113,
114
PM sensorless vector control
20
V/F control (Advanced magnetic flux vector control,
PM sensorless vector control)
451
G300
Second motor control
method selection
9999
0 to 6,
10 to 14, 20,
100 to 106,
110 to 114
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.
9999 The Pr. 800 setting is used.
II002822E
Fig. 5-55: Effect of speed command value and torque limit value on generated torque
Vector Vector Vector
0
0
0
Speed command value
Line speed
Torque limit value
(absolute value)
Generated torque
Power driving
Regenerative driving