Discrete-time observer for induction machine in presence of magnetic saturation - Archive ouverte HAL
Communication Dans Un Congrès Année : 2008

Discrete-time observer for induction machine in presence of magnetic saturation

Résumé

We are considering the problem of state estimation in induction motors. One key feature of this work is that the problem is dealt with based upon a model that accounts for the saturation effect of the magnetic circuit characteristic. Indeed, magnetic saturation cannot be ignored, especially when high power machines are considered. The above model is first based upon to analyse the machine observability. Then, a continuous-time high-gain observer is presented and discretized for application purpose. Time-discretization is necessary because real-time implementation can only be done using digital equipments. The discretization task constitutes a crucial issue due to the nonlinear feature of the (continuous) observer. It is coped with using the Taylor-Lie method and the (discrete-time) observer thus obtained is evaluated experimentally using an asynchronous motor of 7.5 KW.
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Dates et versions

hal-00384893 , version 1 (16-05-2009)

Identifiants

  • HAL Id : hal-00384893 , version 1

Citer

Fouad Giri, Abderrahim Elfadili, Hamid Ouadi, Luc Dugard, Gabriel Buche. Discrete-time observer for induction machine in presence of magnetic saturation. IFAC WC 2008 - 17th IFAC World Congress, Jul 2008, Séoul, South Korea. ⟨hal-00384893⟩
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