Thermoelectric-Structural Analysis of an Axial Flux Superconducting Motor

• Autor(a) principal: Gregório, Fábio José da Encarnação
• Data de Publicação: 2022
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10362/151315
• topic: superconductivity; axial flux machines; superconducting machines; electromagnetic losses; thermal losses; structural analysis; Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática

The growing environmental concerns to reduce global warming caused by the high levels of CO2 expelled to the atmosphere have played an important role in the electrifi- cation of combustion machines. Following this trend, superconducting machines have proved to be an interesting option, because they allow a higher current density. How- ever, the superconducting compounds require cryogenic operating temperatures. This becomes a problem, because, during its working, the machine operation temperature tends to be increased, heat up due to the losses. With that, the losses study becomes a relevant topic to be studied. In this work, a partially superconducting machine will be analyzed, through an elec- tromagnetic, thermal, and structural finite element simulation of its conventional stator. The superconducting electrical machine studied is an axial flux machine with a disc rotor made of second-generation high-temperature superconducting (2G HTS) strips and two ferromagnetic conventional semi-stators. This study is focused on the losses of these last ones because the superconducting strips have minimal losses compared to the semi- stators ones. It is concluded that the semi-stators losses are inversely proportional to the pole number and that the stator lamination typology with fewer losses is circularly laminated.