E6581611
F-9
6
6.1.5 Increasing starting torque
au2 : Torque boost setting macro function
Function
Simultaneously switches inverter output (V/F) control and programs motor constants automatically (On-
line automatic-tuning function) to improve torque generated by the motor. This parameter integrates the
selection of function including vector control and setting of auto-tuning.
[Parameter setting]
Title Function Adjustment range Default setting
Torque boost setting macro
function
0: -
1: Automatic torque boost + auto-tuning
2: Vector control + auto-tuning
3: Energy saving + auto-tuning
0
Note1) Parameter displays on the right always return to after setting. The previous setting is displayed on the left.
Ex.
Note2) Auto-tuning is performed at the start of the motor.
1) Increasing torque automatically according to the load
is set to (Automatic torque boost + auto-tuning)
When torque boost setting macro function control is set to 1 (automatic torque boost + auto-tuning),
the inverter keeps track of the load current in any speed range and automatically adjusts the output voltage to
ensure enough torque and stable operation.
Note 1: The same characteristic can be obtained by setting the V/F control mode selection parameter to
(automatic torque boost control) and the auto-tuning parameter to (auto-tuning).
Refer to section 6.25
Note 2: Setting to automatically programs to .
Caution:
When the torque boost setting macro function is set, look at the motor's name plate and set the
following parameters.
: Base frequency 1 (rated frequency)
vlv : Base frequency voltage 1 (rated voltage)
: Motor rated capacity
: Motor rated current
: Motor rated speed
Set the other motor constants as necessary.
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