Abstract
This paper, which deals with the stability of adaptive observers for induction motor in the regenerating mode, proposes a new approach that is consist of describing the error system in state space representation. With this formulation, it is possible to establish a cartography of unstable eigenvalues in the torque/speed plane, thus simplifying the stability analysis. Moreover, a new stability criterion is defined and used to realize stabilizing designs based on feedback gain as well as on the speed adaptation law.
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