Activation Of Torque Control During Start And Stop Processes - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.4.6

Activation of torque control during start and stop processes

The inverter does not immediately reach the torque command value when the start signal is
turned on. Motor torque is built up during the transition time by increasing the speed with the
acceleration time set in parameter 7 as shown in Fig. 6-34.
Speed limit value is increased up to
preset value according to the Pr. 7
Start signal
Fig. 6-34: Transition operation
When "0" is set in Pr. 7 or Pr. 8 , speed control is exercised upon powering off a start signal and
the output torque is limited at the torque limit value.
Start signal
Fig. 6-35: Transition operation
Signal
Start signal
Torque command
Speed limit
Tab. 6-21: Signal input
FR-A700 EC
"Acceleration time setting".
Speed
Speed limit
Output
torque
Speed
Output
torque
Torque control by real sensorless vector control, vector control
Speed limit value
Torque control
Speed control is peformed during
speed limit. (Thus, torque according
to the commanded is not developed.)
Torque control
Limit at the torque limit value
Description
External operation
PU operation
Select the input method of torque command and input the torque command.
Select the input method of speed limit and input the speed limit value.
Speed limit value is
decreased down to zero
according to the Pr. 8
"Deceleration time setting".
Speed limit
Output torque is provided
according to the terminal 1
setting.
Speed limit value
Speed control
(speed limit)
Output torque is provided
according to the terminal 1
setting.
STF-, STR signal
FWD and REV key of FR-DU07,
FR-PU07 or FR-PU04
I001520E
I001521E
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