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Adaptive observer-based sensorless speed control of induction motors. (Chinese. English summary) Zbl 1174.93566

Summary: The aim of this paper is to deal with the unstable problem of the adaptive speed observer using pole-placement technique, a full-order adaptive state observer is created and a speed identification law is proposed based on the observer. By using the Lyapunov stability theory, the gain matrix of the observer is obtained by solving two bilinear matrix inequalities in Matlab LMI toolbox. The simulation scheme of speed control for a sensorless induction motor using direct torque control is built in the Matlab6.5/Simulink. Simulation results indicate that the proposed observer has good steady performance and good robustness. The speed estimation experiment is implemented in the direct torque control system of induction motor based on TMS320F240. Experiment results show the feasibility of the scheme.

MSC:

93C40 Adaptive control/observation systems
93B55 Pole and zero placement problems
93D05 Lyapunov and other classical stabilities (Lagrange, Poisson, \(L^p, l^p\), etc.) in control theory
15A39 Linear inequalities of matrices
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