Toshiba TOSVERT VF-AS1 - Manually Setting Acceleration;Deceleration Time; Increasing Starting Torque; Automatic Torque Boost

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5.2.2 Manually setting acceleration/deceleration time
Set acceleration time from 0 (Hz) operation frequency to maximum frequency  and deceleration time as the time
when operation frequency goes from maximum frequency  to 0 (Hz).
Output frequency [Hz]


Time [s]
0
= (Manual setting)
[Parameter setting]
Title Function Adjustment range Default setting
 Acceleration time 1 [Note]~ sec.
According to model
⇒ Refer to page K-46.
 Deceleration time 1 [Note]~ sec.
According to model
⇒ Refer to page K-46.
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  (default setting).
⇒ 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
[Parameter setting]
Title Function Adjustment range Default setting
 Automatic torque boost
: Disabled (Always  is displayed.)
: Automatic torque boost+auto-tuning 1
: Sensorless vector control 1+auto-tuning 1

Note: Parameter displays on the right always return to  after resetting. The previous setting is displayed on the
left.
Ex.  
• 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.