Robust adaptive flux observer for induction motor control

This paper presents a robust adaptive flux observer for induction motor control. The proposed flux observer guarantees the robustness against parametric uncertainties, and needs no estimation schemes with employing additional robustifying signal to cope with parametric uncertainties. The proposed adaptive scheme is determined so that the observer dynamics are stable in the sense of Lyapunov. The estimated rotor speed is then used to generate feedback control signal for speed sensorless vector control system. The simulation results are presented to show the validity and efficiency of the proposed system.