Design Issues and Estimation Errors Analysis of Back-EMF-Based Position and Speed Observer for SPM Synchronous Motors

A back-electromotive force-based sensorless technique for surface-mounted permanent magnet synchronous motor drives is considered in this paper. The model of the observer is developed in the Laplace domain and represents an original approach with respect to state-of-art proposals, normally employing...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2014-06, Vol.2 (2), p.159-170
Main Authors: Bolognani, Silverio, Calligaro, Sandro, Petrella, Roberto
Format: Article
Language:English
Subjects:
Current measurement
Observers
Rotors
Steady-state
Transfer functions
Voltage measurement
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Summary:A back-electromotive force-based sensorless technique for surface-mounted permanent magnet synchronous motor drives is considered in this paper. The model of the observer is developed in the Laplace domain and represents an original approach with respect to state-of-art proposals, normally employing a state-space representation. This allows a more intuitive but equivalent design of the observer's gains, based on the standard frequency response, as compared with eigenvalues analysis. Moreover steady-state errors are obtained from a theoretical point-of-view, including the effects of the most common nonidealities affecting the drive system and parameters sensitivity. Full simulation and experimental characterization of the sensorless drive is provided with reference to a general purpose industrial drive, i.e., both in transient and steady-state and in the most meaningful speed/torque operating conditions.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2013.2296974