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A nonlinear tracking control for sensorless induction motors with uncertain load torque
Author(s) -
Marino R.,
Tomei P.,
Verrelli C. M.
Publication year - 2008
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.955
Subject(s) - control theory (sociology) , stator , torque , induction motor , nonlinear system , rotor (electric) , tracking (education) , direct torque control , constant (computer programming) , vector control , computer science , engineering , physics , control (management) , voltage , mechanical engineering , psychology , pedagogy , electrical engineering , quantum mechanics , artificial intelligence , thermodynamics , programming language
We propose a novel nonlinear tracking control algorithm for induction motors with uncertain load torque in which only stator currents are used for feedback: rotor speed and flux sensors are not required; no open‐loop integration of flux dynamics is used. For a class of reference signals, for sufficiently small computable time‐varying load torque uncertainty and for any initial condition belonging to an explicitly computed region, closed‐loop boundedness is guaranteed while, under persistency of excitation, local exponential rotor speed and flux modulus tracking are achieved in the case of constant load torque. Copyright © 2007 John Wiley & Sons, Ltd.