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Estimation of flux and speed of induction machine using non-singular terminal sliding-mode observers

In this work, high-order non-singular terminal sliding-mode observers are presented. These observers are designed in order to estimate rotor fluxes and rotor speed of induction motors. The first observer provides the currents estimates which serve as an input for the second observer. The output of the second observer is the rotor fluxes estimates. Finally, estimates of the rotor fluxes are utilized to foresee rotor speed.