NDLI: A synchronous reference frame sliding mode based estimator for the speed and flux magnitude of the induction motor drive

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 speed and rotor flux magnitude estimation for the induction motor (IM) drive and presents a sliding mode observer (SMO) that is constructed based on the IM model in the synchronous reference frame. To implement the control scheme of the IM drive, generally, the speed and the flux magnitude are needed. In a control scheme with speed and flux regulation, they are used for d and q axis feedback. If the current control scheme uses a decoupling compensator, the flux and speed are needed to compute the decoupling voltages. The paper develops a SM observer for the flux magnitude based on the synchronous reference frame model of the IM. The method assumes that the d-q voltages and currents are available. The observer requires knowledge of the motor speed - instead, the SMO is fed with a speed estimate (assumed inaccurate). Using a specific gain design, the SMO is made insensitive to the input speed inaccuracy. Using the equivalent controls of the observer, the initial speed estimate is corrected to obtain two secondary speed estimates. A weighted average speed estimate that combines the secondary estimates is also shown. The theoretical findings are supported with simulations.
Starting Page	725
Ending Page	730
File Size	938765
Page Count	6
File Format	PDF
ISBN	9781479947492
DOI	10.1109/SPEEDAM.2014.6871912
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	Induction motors sensorless control induction motor Rotors Observers Synchronous motors speed estimation rotor flux estimation sliding mode observer Mathematical model Equations
Content Type	Text
Resource Type	Article

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