NDLI: An MRAS-type estimator for the speed, flux magnitude and rotor flux angle of the induction motor using sliding mode

Content Provider	IEEE Xplore Digital Library
Author	Comanescu, M.
Copyright Year	2014
Description	Author affiliation: Dept. of Eng., Penn State Altoona, Altoona, PA, USA (Comanescu, M.)
Abstract	The paper discusses the problem of estimating the speed, the flux magnitude and the rotor flux angle of the induction motor (IM) and presents an estimation method based on two Sliding Mode Observers (SMOs) and the Model Reference Adaptive System (MRAS) technique. The method is based on implementation of two SMOs that both yield the magnitude of the rotor flux; one observer is the reference model, the other is the adjustable model. The MRAS method is used to adapt the speed signal which is an input into both SMOs. The reference model is designed using the equations of the IM in the rotating reference frame. It is shown that its estimated flux magnitude is insensitive to the input speed. The adjustable model uses the IM equations in the stationary reference frame. Its output fluxes have magnitudes inverse proportional with the input speed; however, their phases are always accurate (this allows estimation of the flux angle). Using MRAS, the speed is corrected such that the flux magnitudes coming out of the two models match. Based on the structure developed, the paper also a speed estimation method. The simulations validate the theoretical development.
Starting Page	719
Ending Page	724
File Size	991219
Page Count	6
File Format	PDF
ISBN	9781479947492
DOI	10.1109/SPEEDAM.2014.6871913
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-18
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	model reference adaptive system Adaptation models Induction motors sensorless control induction motor Rotors Observers speed estimation rotor flux estimation sliding mode observer Equations rotor flux angle estimation Mathematical model
Content Type	Text
Resource Type	Article

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