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《Mechanical & Electrical Engineering Magazine》 2009-06
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Induction motor's speed sensor less control based on MRAS

MENG Fei-feng,NAN Yu-rong,CHEN Qing-xue(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310032,China)  
For the study of the speed estimate and control in the speed sensor less direct torque control system,a new speed-adaptive flux observer based on model reference self-adapt control system theory was designed.The observer was regarded as adjustable model which used the stator current and the stator flux as state variable,motor itself was regarded as reference model.The observation of flux and estimate of speed were combined at the meantime.The observered flux was applied to direct torque control system.The speed adaptive scheme of speed estimation was obtained utilizing Lyapunov's stability theory.This approach was implemented on Matlab/Simulink software.The simulation results show that the method gives satisfying estimation of stator flux and rotor speed in the whole speed range.
【CateGory Index】: TM343
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