E6581595
E-7
5
If the programmed value is shorter than the optimum acceleration/deceleration time determined by load
conditions, overcurrent stall or overvoltage stall function may make the acceleration/deceleration time longer
than the programmed time. If an even shorter acceleration/deceleration time is programmed, there may be an
overcurrent trip or overvoltage trip for inverter protection. (Refer to section 13.1 for details)
5.4 Increasing starting torque
: 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
setting of special V/F control selection such as vector control.
[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
Note: Parameter displays on the right always return to after setting. The previous setting is displayed on the left.
Ex.
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.
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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