Discrete-Time Observer Design for Sensorless Synchronous Motor Drives

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Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
Series
IEEE Transactions on Industry Applications
Abstract
This paper deals with the speed and position estimation of interior permanent-magnet synchronous motor (IPM) 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 major performance improvements can be obtained with the direct discrete-time design, especially if the sampling frequency is relatively low compared to the fundamental frequency. The ratio below 10 between the sampling and fundamental frequencies is achieved in experiments with the proposed discrete-time design.
Description
Keywords
modeling errors, observer, speed sensorless, stability conditions
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Citation
Awan, Hafiz Asad Ali & Tuovinen, Toni & Saarakkala, Seppo E. & Hinkkanen, Marko. 2016. Discrete-Time Observer Design for Sensorless Synchronous Motor Drives. IEEE Transactions on Industry Applications. 11. ISSN 0093-9994 (printed). DOI: 10.1109/tia.2016.2572105.