Comparison Criteria and Stability Analysis of Electrodynamic Thrust Bearings
Electrodynamic bearings can ensure contactless levitation of rotors at room temperature solely relying on passive phenomena.Recently,two models describing the axial quasi-static and dynamic behaviours of a wide variety of electrodynamic thrust bearings(EDTBs)have been derived.However,although these models enable to study EDTB topologies in terms of stiffness and rotational losses,criteria allowing us to objectively compare their intrinsic qualities still lack.The present paper thus introduces four comparison criteria related to the axial stiffness,the bearing energy efficiency and the external damping required to stabilise the thrust bearing regardless of the spin speed.To this end,an analytical stability analysis is first performed on the basis of these dynamic models.This notably leads to static and dynamic conditions that ensure the stability at a specific speed.Finally,three topologies are compared on the basis of the comparison criteria in the framework of a case study.
Joachim Van Verdeghem Virginie Kluyskens Bruno Dehez
Center for Research in Mechatronics(CEREM),Institute of Mechanics,Materials and Civil Engineering(IMMC),Université catholique de Louvain(UCL),Louvain-la-Neuve 1348,Belgium
国际会议
the 16th International Symposium on Magnetic Bearings (第十六届国际磁悬浮轴承大会) (ISMB6)
北京
英文
1-9
2018-08-13（万方平台首次上网日期，不代表论文的发表时间）