Sensorless vector control of synchronous reluctance motors with disturbance torque observer

The elimination of the position sensor has been one important requirement i n vector control systems because the position sensor spoils the reliability and simplicity of drive systems, Therefore, we present a sensorless vector control technique for synchronous reluctance motors. The rotor position is calculated easily from ds-qs-axes flux linkages which are estimated with a first-order lag compensator. Furthermore, utilizing estimated rotor positi on as the input of the full-order observer, the rotor speed and disturbance torque are estimated, The proposed sensorless vector control scheme is dem onstrated with experimental results.