Auto Torque Boost and When to Use It
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.
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.