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Adaptive state observers for sensorless control of switched reluctance motors
Author(s) -
Ortega R.,
Sarr A.,
Bobtsov A.,
Bahri I.,
Diallo D.
Publication year - 2018
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.4420
Subject(s) - control theory (sociology) , switched reluctance motor , observer (physics) , control engineering , nonlinear system , computer science , controller (irrigation) , rotor (electric) , state (computer science) , state observer , adaptive control , control (management) , engineering , artificial intelligence , algorithm , physics , mechanical engineering , agronomy , quantum mechanics , biology
Summary In this paper, we address the problem of state observation for sensorless control of switched reluctance motors (SRMs), that is, the regulation of the motor measuring only the voltage and the current of the electrical supply. Instrumental for the construction of the observer is the derivation of algebraic relations, which define regression models, between the unknown rotor flux and the measured quantities. With the knowledge of the flux, it is shown that the mechanical coordinates can be estimated with suitably tailored adaptive nonlinear observers. Replacing the observed states, in a certainty equivalent manner, with a full information stabilizing law completes the sensorless controller design. In contrast with other motors, there is no universally accepted mathematical model to describe the dynamics of SRMs. To widen our target audience, we present the results for four different mathematical models reported in the literature. Simulation results with a precise (finite element) model of the SRM are used to illustrate the performance of the proposed observer and sensorless control.