LSIS G100, Operation Manual

Page: 103 / 343

4.12.2 Auto Torque Boost
In V/F operation, this adjusts the output voltage if operation is unavailable due to a low
output voltage. It is used when operation is unavailable, due to a lack of starting
torque, by providing a voltage boost to the output voltage via the torque current.
Group Code Name Setting Setting Range Unit
dr 15
Torque boost
mode
1 Auto 0
–1
-
dr 26
Auto torque
boost filter gain
2 1
–1000
-
dr 27
Auto torque
boost motoring
voltage gain
50.0 0.0
–300.0
%
dr 28
Auto torque
boost
regeneration
voltage gain
50.0 0.0
–300.0
%
You can use the
parameter value displayed on the motor’s rating plate without motor
parameter tuning. Use after entering the value recorded on the motor’s rating plate in
dr18 (base frequency), bA12 (motor’s rated slip frequency), bA13 (motor’s rated
current), and bA14 (
motor’s no load current). If you do not use the value displayed on
the motor’s rating plate, each parameter value is set to the initial value and some
features may be limited.
In V/F operation, this adjusts the output voltage if operation is unavailable due to a low
output voltage. Use when it cannot be started due to the lack of the starting torque as
a method to output voltage by adding the voltage boost quantity calculated by using
torque current on the manual torque boost quantity (dr16, dr17). If the run direction is
forward, dr16 forward torque boost quantity is applied. If the direction is reverse, dr17
reverse torque boost quantity is applied. As the values to adjust the amount of
compensation according to the load, dr27 and dr28 automatic torque boost voltage
gain can be adjusted and used when there is a lack of starting torque or when
excessive current is flowing.
If number 1 (automatic torque boost) is selected from the dr15 code of drive (dr) group,
dr26, dr27, and dr28 parameters can be corrected and the inverter outputs voltage
according to the torque boost quantity.