Manually Setting Acceleration/Deceleration Time; Increasing Starting Torque - Toshiba TOSVERT VF-AS1 Instruction Manual

5.2.2 Manually setting acceleration/deceleration time

Set acceleration time from 0 (Hz) operation frequency to maximum frequency
when operation frequency goes from maximum frequency
Output frequency [Hz]
[Parameter setting]
Title
Acceleration time 1
Deceleration time 1
Note:The minimum setting of acceleration and deceleration times have been set respectively at 0.1 sec. by default, but
they can be changed within a range of 0.01 sec. (setting range:0.01~600.0 sec.) by changing the setting of the
parameter
⇒ For details, refer to Section 5.20.
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.
⇒ For details, refer to Section 13.1.
5.3

Increasing starting torque

: Automatic torque boost
• Function
Simultaneously switches inverter output V/f control and programs motor constants automatically
(auto-tuning function 1) to improve torque generated by the motor. This parameter integrates the
setting of special V/f control selection such as automatic torque boost or vector control.
Constant torque characteristics (default setting)
Automatic torque boost+auto-tuning 1
Sensorless vector control 1+auto-tuning 1
Note: Square reduction torque control, sensor vector control (optional), etc. can be selected using the V/f
control mode selection parameter
⇒ For details, refer to Section 5.6.
[Parameter setting]
Title
Automatic torque boost
Note: Parameter displays on the right always return to
left.
Ex.
0
Function
(default setting).
.
Function
: Deselect (Always
:Automatic torque boost+auto-tuning 1
: Sensorless vector control 1+auto-tuning 1
E-3
and deceleration time as the time
to 0 (Hz).
= (Manual setting)
Time [s]
Adjustment range
[Note]~ sec.
[Note]~ sec.
Adjustment range
is displayed.)
after resetting. The previous setting is displayed on the
E6581301
Default setting
According to
model
According to
model
5
Default setting