Increasing Starting Torque - Toshiba Tosvert VF-S15 Instruction Manual

6.1.5

Increasing starting torque

au2 : 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
selection of function including vector control and setting of auto-tuning.
[Parameter setting]
Title Function
Torque boost setting macro

function
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.
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.
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.
Note 1: The same characteristic can be obtained by setting the V/F control mode selection parameter  to
 (automatic torque boost control) and the auto-tuning parameter  to  (auto-tuning).
Note 2: Setting  to  automatically programs  to .
Adjustment range
0: -
1: Automatic torque boost + auto-tuning
2: Vector control + auto-tuning
3: Energy saving + auto-tuning
F-9
E6581926
Default setting
0
6
 Refer to section 6.25