Improved speed estimation in sensorless PM brushless AC drives

Abstract

The application of flux-observer-based sensorless control to permanent-magnet brushless AC motor drives is described. Current methods of speed estimation are assessed, both theoretically and experimentally, and an improved method, which combines the best features of methods in which speed is derived from the differential of rotor position and from the ratio of the electromotive force to excitation flux linkage, is proposed. Its performance is verified experimentally.

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Authors/Creators:	Shen, J.X. Zhu, Z.Q. Howe, D.
Copyright, Publisher and Additional Information:	Copyright © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	brushless ac drives, flux observer, permanent magnet machines, sensorless control, speed estimation
Dates:	Published: July 2002
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Depositing User:	Sherpa Assistant
Date Deposited:	12 Dec 2005
Last Modified:	06 Jun 2014 19:57
Published Version:	http://dx.doi.org/10.1109/TIA.2002.800778
Status:	Published
Refereed:	Yes
Identification Number:	https://doi.org/10.1109/TIA.2002.800778

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Improved speed estimation in sensorless PM brushless AC drives

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