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E-5
(Automatic V/f mode setting) and (Motor control mode selection)
The automatic control parameter is designed to set motor control mode selection parameter
() and the auto-tuning parameter() by one operation. Therefore, changing the
setting causes the settings of all related parameters to be changed automatically.
Parameters set automatically
is always displayed.
Check the setting (set value).
((constant torque) if no change is
made to )
Automatic torque boost
+auto-tuning
Automatic torque boost
Executed (Returns
to after
execution)
Vector control (speed) +
auto-tuning
Sensor-less vector control
(speed control)
Executed (Returns
to after
execution)
Automatic energy-saving +
auto-tuning
Automatic energy-saving +
sensorless vector control
Executed (Returns
to after
execution)
To increase torque manually (V/f constant control)
The VF-A7 inverter has been set to this control mode by default.
This control mode in which the torque is kept constant is suitable for belt conveyers, and so on.
It is recommended to select this mode if you want to manually increase the starting torque.
To return to the V/f constant control mode after changing the setting of the parameter
,
Set the motor control mode selection parameter at (constant torque)
=> Refer to 5.10
Note 1) If there is a need to further increase the torque, increase the torque boost rate, using the
manual torque boost parameter
. For the procedure for setting the manual torque
boost parameter
=> Refer to 5.12)
2) The square reduction torque characteristic (set the motor control mode selection
parameter at ) is effective in controlling such loads as fans and pumps.
=> Refer to 5.10