Navegação Engenharias por Autor "Homrich, Roberto Petry"
Resultados 1-8 de 8
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Design and test of HTS coils for resistive fault current limiter
Homrich, Roberto Petry; Ruppert Filho, Ernesto; Pinatti, Daltro Garcia; Baldan, Carlos Alberto; Shigue, Carlos Yujiro; Freitas, Rafael Cassiolato de (2004) [Artigo de periódico]This paper presents the design, manufacturing and test results of HTS coils for single-phase resistive current limiters using two different Bi-2223/Ag tapes. Two coils were separately wound on cylindrical G-10 tubes with ... -
Evaluation of the normal force of a planar actuator
Silveira, Marilia Amaral da; Flores Filho, Aly Ferreira; Homrich, Roberto Petry (2005) [Artigo de periódico]This paper describes a method to compute the normal force that acts on the mover of an electromagnetic planar actuator. The method is based on the Maxwell Stress Tensor and depends on the resulting magnetic field. The ... -
Fast single layer cylindrical and helicoidal coil with voids between turns electromagnetic field calculation to be used in superconducting current limiter simulator for design purpose
Homrich, Roberto Petry; Ruppert Filho, Ernesto; Pinatti, Daltro Garcia; Baldan, Carlos Alberto; Shigue, Carlos Yujiro; Freitas, Rafael Cassiolato de (2004) [Artigo de periódico]This paper presents a mathematical method to quickly calculate the flux density vector B produced by the current circulating in a resistive single-phase superconducting electrical current limiter (RSCL), at any point of ... -
Helicoidal single-layer cylindrical coil self-inductance evaluation : a didactic method
Homrich, Roberto Petry; Ruppert Filho, Ernesto; Pinatti, Daltro Garcia (2001) [Artigo de periódico]This paper presents a didactic mathematical method to evaluate the self-inductance of a nonmagnetic core single-layer cylindrical and helicoidal coil presenting voids between turns. This type of calculation, using Biot–Savart ... -
A model of a permanent magnet axial-flux machine based on lie’s symmetries
Loureiro, Luiz Tiaraju dos Reis; Flores Filho, Aly Ferreira; Zabadal, Jorge Rodolfo Silva; Homrich, Roberto Petry (2008) [Artigo de periódico]A permanent magnet axial-flux machine was designed, built, and tested. Numerical and analytical models were developed for the machine and comparisons were carried out. The analytical models rely on Lie’s symmetries and the ... -
Simplified mathematical modeling for an electromagnetic forming system with flat spiral coil as actuator
Paese, Evandro; Geier, Martin; Homrich, Roberto Petry; Pacheco, Joyson Luiz (2011) [Artigo de periódico]This study presents mathematical modeling and calculation procedure for problems of electromagnetic forming of thin circular metal sheets using a flat spiral coil as actuator. The method based on the Biot-Savart Law focuses ... -
Single layer cylindrical and helicoidal coil with voids between successive turns electromagnetic field calculation to be used in superconductor current limiter simulator for design purpose
Homrich, Roberto Petry; Ruppert Filho, Ernesto; Pinatti, Daltro Garcia; Baldan, Carlos Alberto; Shigue, Carlos Yujiro; Freitas, Rafael Cassiolato de (2004) [Artigo de periódico]A very accurate mathematical method, named Helicoidal Method, to calculate the flux density vector B produced by the current circulating in the resistive single-phase superconductor electrical current limiter (RSCL) coils, ... -
Single-phase resistive superconductor electrical current limiter
Homrich, Roberto Petry; Ruppert Filho, Ernesto; Pinatti, Daltro Garcia; Baldan, Carlos Alberto; Shigue, Carlos Yujiro (2002) [Artigo de periódico]This paper presents the analysis, design, construction and ac test results of low voltage single-phase resistive superconductor electrical current limiters. Two different types of resistive superconductor current limiter ...