Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Ramon C. F. Araújo"'
Publikováno v:
Energies, Vol 15, Iss 1, p 326 (2022)
In this study, a methodology for automatic recognition of multiple simultaneous types of partial discharges (PDs) in hydro-generator stator windings was proposed. All the seven PD sources typical in rotating machines were considered, and up to three
Externí odkaz:
https://doaj.org/article/d38fb367e0f14ed288508ce7a2844f0c
Publikováno v:
Energies, Vol 14, Iss 11, p 3267 (2021)
In this paper, a novel image denoising algorithm and novel input features are proposed. The algorithm is applied to phase-resolved partial discharge (PRPD) diagrams with a single dominant partial discharge (PD) source, preparing them for automatic ar
Externí odkaz:
https://doaj.org/article/c3508af11abf49e2b47adcf3ae2e0aa7
Autor:
Wellington da Silva Fonseca, Ramon C. F. Araújo, Marcelo de Oliveira e Silva, Daniel Onofre de A. Cruz
Publikováno v:
Energies, Vol 14, Iss 9, p 2463 (2021)
Important industrial applications are based on magnetohydrodynamics (MHD), which concerns the flow of electrically conducting fluids immersed in external magnetic fields. Using the Finite Volume Method, we performed a 3D numerical study of the MHD fl
Externí odkaz:
https://doaj.org/article/7f14e66b7dc649b485ed422144537841
Autor:
Fernando S. Brasil, Wellington da Silva Fonseca, José William Ribeiro Borges, Ramon C. F. Araújo
Publikováno v:
International Journal of Applied Electromagnetics and Mechanics. 65:513-526
The electrical insulation is one of the main sources of failures in hydro-generators, therefore it is important to research the insulation system of stator bars. In this paper, it is developed a steady-state multiphysics analysis of a stator bar usin
Autor:
Jhennifer Freitas dos Santos, Wellington Da Silva Fonseca, Ramon C. F. Araújo, Bendict Katukula Tshoombe
Publikováno v:
2021 14th IEEE International Conference on Industry Applications (INDUSCON).
This article presents a Digital Twin (DT)-based monitoring and analysis system for the condition monitoring of induction motors. The system measures current drawn by the motor through a current sensor that sends the analog signal to a microcontroller
Autor:
Marcus Vinícius Alves Nunes, Antonio Roniel Marques de Sousa, Diorge de Souza Lima, Ramon C. F. Araújo, Wellington da Silva Fonseca
Publikováno v:
2021 14th IEEE International Conference on Industry Applications (INDUSCON).
The main equipment responsible for connection and transmission of electric power from generating centers to consumers are power transformers. This equipment is subject to various types of faults that can affect its components, in some cases also comp
Autor:
Antonio Roniel Marques de Sousa, Diorge de Souza Lima, Wellington da Silva Fonseca, Ramon C. F. Araújo, Marcus Vinícius Alves Nunes
Publikováno v:
Energies
Volume 14
Issue 11
Energies, Vol 14, Iss 3266, p 3266 (2021)
Volume 14
Issue 11
Energies, Vol 14, Iss 3266, p 3266 (2021)
The main equipment responsible for connection and transmission of electric power from generating centers to consumers are power transformers. This type of equipment is subject to various types of faults that can affect its components, in some cases a
Autor:
Wellington da Silva Fonseca, Elen Priscila de Souza Lobato, Ramon C. F. Araújo, Antonio Roniel Marques de Sousa, Paulo Rodrigues Santos, Allan R. A. Manito
Publikováno v:
Brazilian Journal of Development. 5:13086-13101
Publikováno v:
Energies; Volume 14; Issue 9; Pages: 2463
Energies, Vol 14, Iss 2463, p 2463 (2021)
Energies, Vol 14, Iss 2463, p 2463 (2021)
Important industrial applications are based on magnetohydrodynamics (MHD), which concerns the flow of electrically conducting fluids immersed in external magnetic fields. Using the Finite Volume Method, we performed a 3D numerical study of the MHD fl
Autor:
Rodrigo M. S. de Oliveira, Daiyuki M. Fujiyoshi, Lorena F.P. Carvalho, Júlio A. S. do Nascimento, Ramon C. F. Araújo
Publikováno v:
Journal of Electrostatics. 87:263-275
In this paper, we develop a soil dispersion model into the FDTD algorithm for analyzing grounding systems. The model is constructed by inserting into frequency-domain Maxwell-Ampere equation a Pade approximant for σ + jω e , in such way functions a