Toshiba TOSVERT VF-S11 - 5.2 Increasing starting torque

E6581158
E-3
5
[Parameter setting]
Title Function Adjustment range Default setting
CEE Acceleration time 1 0.0-3200 sec. 10.0
FGE
Deceleration time 1 0.0-3200 sec. 10.0
Note:When the acceleration/deceleration time is set at 0.0 seconds, the inverter speed increases or reduces
speed within 0.05 seconds.
, 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 further details, see 13.1)
5.2 Increasing starting torque
CW : Automatic torque boost
• 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.
Title Function Adjustment range Default setting
CW
Automatic torque boost
0: Disabled
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
Set the automatic control CW is set to  (automatic torque boost + auto-tuning)
When the automatic control parameter CW is set to  (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.