ABDELRAHMAN ALI MOHAMED ELSMAN

Dottore di ricerca

ciclo: XXXIII

supervisore: Prof. Fabio Giulii Capponi

Titolo della tesi: Fundamental Limitations in Model-Based Position Estimation of Interior Permanent Magnet Synchronous Motor Drives

Many drive manufacturers aim to adopt sensorless control methods in modern drive systems, and the main impetus behind that is to enhance reliability and reduce costs. However, these methods exhibit inherent limitations on their performance, and parameters uncertainty leads to inaccurate rotor position estimation, compared to sensed-based drives. This research aims to develop a general approach, that can help the designers to predict and analyze position estimation errors and evaluate the dynamic performances of electro-motive-force-based observers, in order to maintain a desired performance. Complex vector modelling is used to identify the estimated position errors and dynamic properties of these observers. A unified analytical framework is presented, that allows to derive, for the first time, an exact explicit expression for the steady-state position estimation errors in which they are extensively investigated for stator resistance mismatch, inductances mismatch, voltage distortion, and current measurement errors. Sensorless control algorithms are also implemented and evaluated, as a case study, in safety-relevant steer-by-wire applications, in order to enable fail-operational performance.

Produzione scientifica

11573/1577185 - 2022 - Resolution of rotor position measurement. Modelling and impact on speed estimation

Scelba, Giacomo; De Donato, Giulio; Elsman, Abdelrahman; Tornello, Luigi Danilo; Scarcella, Giuseppe; Giulii Capponi, Fabio - 01a Articolo in rivista

rivista: IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS (New York, N.Y. : Institute of Electrical and Electronics Engineers, 2013-) pp. 1992-2004 - issn: 2168-6777 - wos: WOS:000777346600059 (6) - scopus: 2-s2.0-85128145443 (7)

11573/1578179 - 2020 - Compensation of Saliency Tracking Static Estimation Errors in Sensor Fault Tolerant IPMSM Drives

Rehorik, K.; Grothmann, B.; Elsman, A.; Gerling, D.; Capponi, F. G. - 04b Atto di convegno in volume

congresso: 46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020 (Singapore)

libro: IECON Proceedings (Industrial Electronics Conference) - (978-1-7281-5414-5)

11573/1448853 - 2019 - Comprehensive Analysis of Extended Electro Motive Force Observers for Position Estimation in Interior Permanent Magnet Synchronous Machines

Elsman, A.; Capponi, F. G.; Caricchi, F. - 04b Atto di convegno in volume

congresso: 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 (Baltimore, Maryland, USA)

libro: 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 - (978-1-7281-0395-2)

11573/1344165 - 2019 - Evaluation of extended electro motive force observer dynamic performances using complex vectors

Elsman, A.; Capponi, F. G.; De Donato, G.; Caricchi, F. - 04b Atto di convegno in volume

congresso: 10th IEEE International symposium on sensorless control for electrical drives, SLED 2019 (Turin; Italy)

libro: 2019 IEEE 10th International symposium on sensorless control for electrical drives, SLED 2019 - (978-1-7281-0766-0)