The sensorless voltage vector control law (VVC) is used for a constant torque profile, so the drive will deliver a constant flux up to the rated frequency.
It is based on Flux Vector control algorithm with speed regulation.
There will be a constant flux law in open loop. The speed is here an estimated speed.
This motor control allows high torque performance at low speed but it is necessary to enter motor characteristics in the drive parameters.

Released for: Schneider Electric Saudi Arabia