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URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/19

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2012 - 20173

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Assunto: search.filters.subject.Active magnetic bearings

Resultados da Pesquisa

Agora exibindo 1 - 3 de 3
  • N/D
    Artigo de evento 1 Citação(ões) na Scopus
    MRAS-based sensorless control for high-speed induction machine connected to the grid
    (2013-11-05) Fabio Lima; ROSA, F. C.; FUMAGALLI, M. A.
    This paper describes a MRAS-based sensorless control of a high-speed squirrel cage induction machine connected to the grid. This paper contributes with the subject when using a high-speed machine supported by active magnetic bearings (AMB) for energy applications. This kind of system is suitable for energy generation from gas sources. To control the grid side as well as the generator side a back-to-back converter with voltage oriented control (VOC) and rotor field oriented control (RFOC), respectively, is used. Simulations are presented for the MRAS observer, and some experimental results are also showed. A test bench was designed and the final experimental results are undergoing. © 2013 IEEE.
  • N/D
    Artigo de evento 7 Citação(ões) na Scopus
    Development of a high-speed turbo-generator supported by active magnetic bearings
    (2012-10-25) ROSA, F. C.; Fabio Lima; FUMAGALLI, M. A.
    This paper presents the construction of a mechanical shaft supported by active magnetic bearings (AMB), reproducing a prototype of a turbogenerator. In turbogenerators, the shaft is supported by two radial and one axial magnetic bearings. At the center of the shaft was inserted a rotor of an induction machine, which will operate as motor as well as generator, and at the shaft extremity is coupled a small turbine. The mechanical modeling and assembly are presented in details. After that the control system of the AMB is introduced. Simulations and experimental results are presented to validate the AMB. The high speed AMB supported shaft reduces the length of the system as well as losses and increases the system efficiency. The validation of the high-speed shaft supported by AMB allows the energy generation, in the future, provided by the asynchronous generator mounted upon the shaft. Prime mover like gas will be considered to provide the mechanical power. © 2012 IEEE.
  • N/D
    Artigo 6 Citação(ões) na Scopus
    A high-speed shaft supported by magnetic bearings applied to energy systems
    (2017) Rosa F.C.; Lima F.; Fumagalli M.A.
    © 2016, The Brazilian Society of Mechanical Sciences and Engineering.This paper presents the construction of a mechanical shaft supported by active magnetic bearings (AMB), reproducing a prototype of a turbogenerator. In turbogenerators, the shaft is supported by two radial and one axial magnetic bearings. At the center of the shaft was inserted a rotor of an induction machine, which will operate as motor as well as generator, and at the shaft extremity is coupled a small turbine. The mechanical modeling and assembly are presented in detail. After that the control system of the AMB is introduced. The high-speed AMB-supported shaft reduces the length of the system as well as losses and increases the system efficiency. The validation of the high-speed shaft supported by AMB allows the energy generation, in the future, provided by the asynchronous generator mounted upon the shaft. Prime mover, such as gas, will be considered to provide the mechanical power. Finally, for injecting the energy into the grid, an indirect field-oriented control (IFOC) was used for high performance of the generator side. On the grid side, the voltage-oriented control (VOC) is applied to guarantee the high quality of the current injected into the grid.