E6581697
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)
5.5
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 c auto-tuning
3: Energy 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.
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.
Summary of Contents for TOSVERT VF-MB1
Page 350: ...2011 07 ...
