Viability of a Frictionless Bearing with Permanent Magnets and HTS Bulks

• Autor(a) principal: Arsénio, António
• Data de Publicação: 2016
• Outros Autores: Carvalho, Martim, Cardeira, Carlos, Branco, Paulo, Rui, Melício
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10174/21727; https://doi.org/10.1109/EPEPEMC.2016.7752172
• topic: Frictionless rotating bearing; levitation and guidance forces; zero field cooling; permanent magnets; HTS bulks

This paper studies the technical viability of a frictionless rotating bearing model comprising one inner rotor part with discontinuous rings with permanent magnets and one outer stator part with discontinuous rings with high temperature superconducting bulks, distributed on a geometric arrangement that guarantees enhanced levitating and guidance forces using the zero field cooling technique. Extensive Finite Element model simulations were carried out to estimate levitation and guidance forces depending on the air gap dimensions. Eccentricity and axial displacement of the rotor are estimated depending on the external radial and axial forces applied to the rotor. Finally, the proposed design of a viable and feasible frictionless bearing prototype is foreseen.