Louis DASSONVILLE defended his PhD on November 23rd, 2023.
Place : amphithéâtre AE1 du bâtiment Gaston Berger à l’INSA Lyon
Jury :
Rapporteurs :
Noureddine Takorabet, Professeur, Université de Lorraine
Éric Semail, Professeur, ENSAM
Examinateurs :
Seddik Bacha, Professeur, Université Grenoble Alpes
Invités:
Ali, Makki, Docteur, PDG de Keep’Motion
Encadrement :
Xuefang Lin-Shi, Professeur , INSA de LyoN, Directeur de thèse
Jean-Yves Gauthier, Maître de conférences, INSA Lyon , co-encadrant de thèse
Abstract :
In recent decades, electrification has been witnessed in numerous applications, especially in the field of transportation. These new applications of electric mobility demand high reliability from electric propulsion systems (EPS), as they do not tolerate total EPS failure, particularly in the aerospace domain. Resilience and power density are the predominant criteria for these applications. The work presented in this thesis introduces a method for analyzing the availability of multiphase Permanent Magnet Synchronous Machines (PMSMs). It becomes evident that open-winding machines are highly resilient to faults. Furthermore, this resilience increases with the number of windings and phases. It can be extended to the EPS level as a whole by adopting a decentralized winding-by-winding structure for electronics and control. This EPS structure raises new challenges, especially in terms of control, which must ensure the tracking of a sinusoidal current reference in each winding without having information from the other windings. A decentralized control based on the property of differential flatness has been proposed. Its effectiveness was first verified through simulations and then validated through experimental tests conducted on a twelve-phase open-winding three-phase PMSM. The results obtained confirm the resilience to open-circuit faults of the proposed EPS structure. This research was conducted in synergy with other studies on low-voltage multiphase machines and power electronics integration. A collaborative development across these three research areas led to the design of an eleven-phase EPS with high power density, resilient to faults. This novel decentralized approach to EPS design opens up numerous research perspectives in the fields of electrical machines, electronics, and control.
Keywords: Resilience, Availability, Decentralized Control, Open Winding, Multiphase, Permanent Magnet Synchronous Machine