Mitsubishi Electric FR-A800, Instruction Manual

Page: 272 / 1042

Speed control under Real sensorless vector control, vector control, PM sensorless vector control Parameters
5 - 92
Setting the torque limit values during acceleration/deceleration individually (Pr. 816, Pr. 817)
●
The torque limit during acceleration and deceleration can be set individually.
Torque limit using the setting values of Pr. 816 "Torque limit level during acceleration" and Pr. 17
"Torque limit level during deceleration" is shown below.
●
If 1 s elapses while the difference between the set speed and rotation speed is within ±2 Hz, the
torque limit level during acceleration/deceleration (Pr. 816 or Pr. 817) changes to the torque
control level during constant speed (Pr. 22).
●
When the difference between the set speed and rotation speed is –2 Hz or less, the torque limit
level during deceleration (Pr. 817) activates.
I002510E
Fig. 5-20: Individual torque limit value during acceleration and deceleration
NOTE The Pr. 816 and Pr. 817 settings are invalid under position control.
Output
frequency
(Hz)
Set
frequency
Torque
limit level
Pr. 816
Pr. 817
Acceleration
Torque limit level
during acceleration
1 s
Torque limit set to Pr. 810
Constant speed
–2 Hz < set speed – rotation speed < 2 Hz
–2 Hz set speed – rotation speed
Deceleration
Torque limit level
during deceleration
Time