Discrete-time observer design for sensorless synchronous motor drives

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Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A4 Artikkeli konferenssijulkaisussa
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
867-874
Series
Abstract
This paper deals with the speed and position estimation of interior permanent-magnet synchronous motor (IPMSM) and synchronous reluctance motor (SyRM) drives. A speed adaptive full-order observer is designed and analyzed in the discrete-time domain. The observer design is based on the exact discrete-time motor model, which inherently takes the delays in the control system into account. The proposed observer is experimentally evaluated using a 6.7-kW SyRM drive. The analysis and experimental results indicate that drastic performance improvements can be obtained with the direct discrete-time design, especially if the sampling frequency is relatively low compared to the fundamental frequency.
Description
Keywords
observer, parameter uncertainties, speed sensorless, stability conditions
Other note
Citation
Tuovinen, Toni & Awan, Hafiz Asad Ali & Saarakkala, Seppo E. & Hinkkanen, Marko. 2015. Discrete-time observer design for sensorless synchronous motor drives. IEEE Energy Conversion Congress and Exposition (ECCE). 867-874. ISBN 978-1-4673-7150-6 (electronic). DOI: 10.1109/ecce.2015.7309779.