Engenharia de Produção
URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/19
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4 resultados
Resultados da Pesquisa
- 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.
- High-speed grid connected induction generator supported by magnetic bearings(2012-10-25) Fabio Lima; ROSA, F. C.; FUMAGALLI, M. A.This paper proposes an implementation of a high-speed induction generator supported by magnetic bearings and connected to the grid. An indirect field oriented control (IFOC) is 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. The magnetic bearings improve the system performance because the absence of any kind of friction. The maintenance of the system is also reduced. The high speed and the absence of mechanical coupling between the turbine and the generator also improve the system performance as well as reduce the total length of the system. Simulation results were carried out with the Matlab/Simulink software. An experimental test bench was constructed to prove the system performance and experimental results are in progress. © 2012 IEEE.
- 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.
- IoT Energy Retrofit and the Connection of Legacy Machines Inside the Industry 4.0 Concept(2019-10-05) Fabio Lima; Alexandre Augusto Massote; Rodrigo Maia© 2019 IEEE.Industry 4.0 concepts has left the hype behind them to become an industrial reality. Several technological pillars provide support to the so called 4th industrial revolution. Among them are the Digital Twin (based on Cyber-Physical-Systems (CPS)) and the Internet of Things (IoT). Moreover, the interoperability from legacy equipment should be provided to the success of this new factory model. A huge concern is focused on the small and medium enterprises (SME) and their steps toward this new industry. Considering this scenario, this work presents a machine retrofit using an energy measurement industrial sensor, an IoT gateway to provide connectivity to this machine as well as show how the generated data could be sent to the cloud. Once in the cloud the data should feedback the digital energy model in one hand and in another hand be shared with third part partners. In order to manage and build massages in proper communication protocols the Node Red software was used and a mobile application was developed to monitor the energy data in real time.