7 Sensorless Vector Control
7.1 IM (Induction Motors)
Sensorless vector control provides a more accurate estimation of the motor rotation speed
compared to V/F control. When auto tuning is completed, the inverter calculates motor speed and
does not require any rotating speed feedback from the motor. Sensorless vector control can also
generate greater torque at a lower level of current.
• For high-performance operation, the parameters of the motor connected to the inverter
output must be measured. Configure the motor-related function group parameters
(MOT Group) by entering the motor specification values from the name plate
• Then, perform auto tuning by setting MOT-11 (Auto Tuning) to 1 (All - rotation type) or 2
(All - static type) to automatically measure other parameters before operating a
synchronous motor in sensorless vector control mode.
• To run high-performance sensorless vector control, the inverter and the motor must
have the same capacity. If the motor capacity is smaller than the inverter capacity by
more than two levels, control may be inaccurate. In that case, change the control mode
to V/F control.
• When operating with sensorless vector control, do not connect multiple motors to the
inverter output.
To Next Page
Loading...
