Design and practical implementation of a back-emf sliding-mode observer for a brushless dc motor

Fakham, Hicham, Djemaï, Mohamed and Busawon, Krishna (2008) Design and practical implementation of a back-emf sliding-mode observer for a brushless dc motor. IET Electric Power Applications, 2 (6). pp. 353-361. ISSN 1751-8660

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Official URL: http://dx.doi.org/10.1049/iet-epa:20070242

Abstract

A sliding-mode observer is proposed in order to estimate the phase-to-phase trapezoidal back-EMF in a brushless DC motor by using only the measurements of the stator currents and voltages. The main feature of the proposed observer is that it is not sensitive to the switching noise and no filtering is required. The back-EMF estimate was then used to deduce the six rotor positions of the motor. In addition, a method to obtain an estimate of the rotor speed of the motor, by exploiting the mathematical relationship between the speed and the back-EMF, is presented. The observer of the trapezoidal back-EMF is implemented practically on a DSP board. Simulation and experimental results are given to show the performance of the observer.

Item Type: Article
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: EPrint Services
Date Deposited: 23 Jul 2009 09:46
Last Modified: 24 Feb 2016 11:29
URI: http://nrl.northumbria.ac.uk/id/eprint/2562

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