Toshiba TOSVERT VF-nC3E - Increasing Starting Torque; Torque Boost Setting Macro Function; Increasing Torque Automatically According to the Load

E6582233
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 12.1 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 Ad
j
ustment ran
g
e Default settin
g

Torque boost setting macro
function
0: Disabled
1: Automatic torque boost + auto-tuning
2: Vector control + auto-tuning
3: Ener
gy
savin
g
+ auto-tunin
g
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.