Comparações teóricas e práticas sobre geometrias de mancais magnéticos

• Ano de defesa: 2018
• Autor(a) principal: Pinto, Paulo Henrique Silva
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio de Janeiro; Brasil; Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia; Programa de Pós-Graduação em Engenharia Elétrica; UFRJ
• Palavras-chave em Português: Engenharia elétrica; Mancais magnéticos ativos; Forças de relutância; Controle de mancais magnéticos; Fluxo interconectado; Controle por DSP; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://hdl.handle.net/11422/11573

Active Magnetic Bearings are mechatronic systems that generate forces through controlled magnetic fields, used to keep rotors centered. These bearings can be used in technological applications that require high speeds, absence of lubrication, longer service life, greater vacuum, lower maintenance costs, lower temperatures and higher purity environments. This work presents a theoretical and practical comparison between the conventional structure that has eight poles operating in a way that the magnetic flux crosses simultaneously two adjacent poles, with a new structure that has four poles generating interconnected magnetic fluxes. The theoretical results provide for greater equivalent mechanical rigidity for this new structure, compared to conventional active magnetic bearings. The development of a mathematical model that allows these predictions, the use of recently constructed prototypes to test if expectations are true and the implementation of current and position control system in a DSP are the main objectives of this work.