Mitsubishi Electric 800 Series Instruction Manual page 195

Torque control under Real sensorless vector control and vector control
Changing the torque characteristic in the constant power output range
(Pr.801, Pr.803)
• Due to the characteristics of motors, the torque is reduced when the speed exceeds the rated speed. To keep the torque
constant at the speed more than the rated speed, set "1 or 11" in Pr.803 Constant output range torque characteristic
selection.
• During torque control, the torque is kept constant in the low-speed range regardless of the Pr.803 setting. However, When
"2" is set in Pr.803 under Real sensorless vector control, the torque may not be kept constant in the low-speed range.
Pr.803 setting
0 (initial value), 10
1, 11
2
• To avoid overload or overcurrent of the inverter or motor, use Pr.801 Output limit level to limit the torque current in the
constant power range.
Pr.801 setting
0 to 400%
9999
Pr.803 = 0, 1, 10, 11
Torque
Constant torque range
Pr.803 = 2
Torque
Constant torque range
Pr.801
Reverse selection of the torque command (Pr.1114)
• Whether the torque command polarity is reversed or not when the reverse rotation command (STR) is turned ON can be
selected using Pr.1114 Torque command reverse selection.
Pr.1114 setting Torque command polarity at STR signal ON (sign)
0 Not reversed
1 (initial value) Reversed
Parameters referred to ???????
Pr.868 Terminal 1 function assignment
Pr.919 and Pr.920 (terminal 1 bias, gain torque)
194
PARAMETERS
Torque characteristic in constant power range
Torque characteristic
Constant motor output
Constant torque
Constant torque
Set the torque current limit level.
The torque limit setting value (Pr.22, Pr.812 to Pr.817, etc.) is used for limiting the torque current.
Constant power range
Pr. 803 = 1, 11:
constant torque command
Pr. 803 = 0, 10:
constant power command
(torque reduction)
Rated speed Speed
Constant power range
Torque reduction
when the output is
limited
Constant torque
command
Rated speed
Speed
page 397
page 407
Output limit
—
Without
With
Description
When the output limit
is not exceeded