Manual Torque Boost - FujiFilm FVR-Micro Instruction Manual

 Torque boost
• Manual torque boost (F09)
In torque boost using F09, constant voltage is added to the basic V/f pattern, regardless of the
load, to give the output voltage. To secure a sufficient starting torque, manually adjust the
output voltage to optimally match the motor and its load by using F09. Specify an appropriate
level that guarantees smooth start-up and yet does not cause over-excitation with no or light
load.
Torque boost per F09 ensures high driving stability since the output voltage remains constant
regardless of the load fluctuation.
Specify the F09 data in percentage to the rated voltage at base frequency 1 (F05). At factory
shipment, F09 is preset to a level that provides approx. 100% of starting torque.
Specifying a high torque boost level will generate a high torque, but may cause
overcurrent due to over-excitation at no load. If you continue to drive the motor, it
may overheat. To avoid such a situation, adjust torque boost to an appropriate level.
When the non-linear V/f pattern and the torque boost are used together, the torque
boost takes effect below the frequency on the non-linear V/f pattern's point.
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