F2-08
Torque control Factory default value 0
Setup range
0 Inactive
1 Enabled
In the vector control mode, the output of speed loop regulator is torque current command. This
parameter is used to îš¿lter the torque command. This parameter needs no adjustment generally
and this lter time can be increased in case of huge speed uctuation. In case of oscillation of
motor, this parameter shall be reduced properly.
The time constant of speed loop îš¿lter is low, and the output torque of the inverter may vary
greatly, but the response is quick.
0: Torque control is inactive, and the inverter performs command speed control. In case of
speed control, the inverter outputs frequency in accordance with the setup frequency command,
and the output torque automatically matches the load torque, but the output torque is limited by
the torque upper limit (refer to F2-09 and F2-10). When the load torque is higher than the setup
torque upper limit, the output torque of the inverter is limited, and the output frequency will be
different from the setup frequency.
1: Torque control is enabled, and the inverter performs torque control. In case of torque control,
the inverter outputs torque in accordance with the setup torque command, and the output
frequency automatically matches the load speed, but the output frequency is limited by the
frequency upper limit (refer to F0-12). When the load speed is higher than the setup frequency
upper limit, the output frequency of the inverter is limited, and the output torque will be different
from the setup torque.
In case of torque control, the torque command is the torque upper limit, and set by the torque
upper limit source (F2-09).
It can perform switching between torque control and speed control via the multifunctional input
terminals.
In case of torque control, the output frequency of the inverter automatically tracks the change
of the load speed, but the change of the output frequency is affected by the setup acceleration/
deceleration time. If it needs to quicken the tracking speed, the acceleration/deceleration time
shall be shortened.
When the setup torque of the inverter is higher than the load torque, the output frequency of the
inverter will rise; when the output frequency of the inverter reaches the frequency upper limit,
the inverter will keep running with the frequency upper limit.
When the setup torque of the inverter is lower than the load torque, the output frequency of the
inverter will fall; when the output frequency of the inverter reaches the frequency lower limit, the
inverter will keep running with the frequency lower limit.
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