Sensorless Sliding Mode-Backstepping Control of the Induction Machine, Using Sliding Mode-MRAS Observer

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In this paper we present a robust control of rotor speed and rotor flux of induction motor. The design of control is based on Backstepping and Sliding Mode techniques, which offers better performance. In this scheme the induction machine is represented by a model described in the fixed stator frame with rotor flux, stator current and rotor speed as stat variables. The backstepping technique is appropriate for such as non linear system. The outputs control can be derived step by step, over virtual-control, through appropriate Lyapunov functions. In order to improve the robustness of this control, we estimate a rotor speed and rotor flux components using a specific MRAS (Model reference adaptive system) observer, based on sliding mode technique. Simulation results are realized and presented to validate and to prove the effectiveness and robustness of the proposed Sensorless control.
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Backstepping Control; Sliding Mode; Lyapunov Stability; Induction Motor Drive; MRAS Observer

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