Dimensionnement et pertes dans un centreur magnétique guidant un volant d'inertie soumis à un balourd : application au stockage d'énergie de longue durée
|Authors:||Bakay, Loïcq Serge|
|Advisor:||Dubois, Maxime; Viarouge, Philippe|
|Abstract:||Nowadays, magnetic bearings are increasingly used in diverse applications. They are generally used in high speed rotating systems where low losses are requested, to avoid dust or lubricant in sensitive environments, for vibration elimination and to limit maintenance. This thesis presents the study of two magnetic bearings configurations radial active magnetic bearings and hybrid radial magnetic bearings used in a long term flywheel energy storage system. In several applications involving magnetic bearings, iron losses are usually neglected. In a long term energy storage application every single loss has to take into account when designing the latters. We have proposed a loss calculation method of two magnetic bearings configurations supporting a flywheel submitted to an unbalance radial force. After some comparisons it emerges that hybride radial magnetic bearings present lower copper losses than active radial magnetic bearings, while iron losses are lower in active magnetic bearings than in hybride magnetic bearings. The flywheel discharge time supported by radial active magnetic bearings is much lower than the one supported by hybrid radial magnetic bearings. According to our study, utilization of hybrid radial magnetic bearings in long term energy storage seems to be more appropriated. Likewise, our study has shown that no matter the configuration of magnetic bearing used, flywheel energy storage promote the high rotating speeds. In other words the discharge time increases with the flywheel’s maximum operating speed.|
|Document Type:||Thèse de doctorat|
|Open Access Date:||18 April 2018|
|Collection:||Thèses et mémoires|
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