CARLOS ANTONIO FRANCA SARTORI

CARLOS ANTONIO FRANCA SARTORI

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Virtual magnetic TL-based channel modeling of SWIPT systems assisted by MTMs
2020 - ALMEIDA, JORGE V. de; SILVA, EDUARDO C. da; MOSSO, MARBEY M.; SARTORI, CARLOS A.F.
This paper describes a general methodology for the description of inductive power and data transfer based on virtual magnetic transmission-lines (VMGTLs). This approach presents a better physical insight on the channel behavior since the model correctly preserves the energy flow between the transmitting and receiving coils. Particularly, the virtual-TL analogy clarifies the mechanism of transmission gain improvement between any two coils assisted by MTM lenses. Based on the results of this work, these lenses do not enhance the magnetic coupling between the drivers, as usually claimed, but create conditions to propagating near-field modes to increase their power transfer. This approach also reveals that MTMs could be employed not only for the increasing of power transfer but also for enlarging the inductive channel bandwidth.
Low-voltage AC surge protective device assessment regarding nuclear plants
2017 - BORSOI, SAD S.; O. NETO, JESUS A.; PEREIRA, CARLOS E.M.; SARTORI, CARLOS A.F.
This paper presents a methodology for low-voltage AC surge protective device (SPD) coordination. As motivation, the required nuclear plant reliability and safety criteria, in which the surge protection coordination can assume an important role, are emphasized. Due to the characteristics of the protection system, and the surge phenomena, an iterative methodology is applied. The SPD selection and specifications are based on the equipment immunity level, insulation and on SPD characteristics, like absorbed energy. Some results are presented and discussed, showing the suitability of the proposed methodology.
Error analysis for near-field EMC problems based on multipolar expansion approach
2017 - LI, Z.; TAVERNIER, F.; BREARD, A.; KRAHENBUHL, L.; VOYER, D.; SARTORI, C.A.F.
Devices using power electronics are ubiquitous today and they are unfortunately intrinsic sources of electromagnetic interference. To address these electromagnetic compatibility problems at the initial design phase, a predictive method based on multipole expansion in spherical harmonics of the near field around each device was developed. To determine the basic expansions of a given source, a dedicated measurement bench has been designed. In this paper, some important issues of this approach and the measurement bench are studied, especially the error analysis on the measurements and the inverse problems. Some experimental results are also shown in the end.
Overview on the evolution of near magnetic field coupling prediction using equivalent multipole spherical harmonic sources
2017 - BREARD, ARNAUD; CHADEBEC, OLIVIER N.; KRAHENBUHL, LAURENT F.; SARTORI, CARLOS A.F.; VOLLAIRE, CHRISTIAN; FABREGUE, OLIVIER; LI, ZHAO; MUYLAERT, RAFAEL P.B.; TAVERNIER, FRANCOIS; VOYER, DAMIEN
In the electromagnetic compatibility behavior of power electronic converters, parasitic magnetic couplings between components are one of the main causes of dysfunctions or poor filtering. These couplings may be either conducted or near-field interferences. To handle interaction problems, full knowledge of these magnetic couplings is essential. This paper is an overview of the work on near magnetic field interference undertaken in the last 15 years by the International Maxwell Laboratory. This paper details a predictive method that accurately and efficiently calculates near magnetic field coupling between two sources. The method uses near-field multipolar expansion in spherical harmonics of electromagnetic sources to determine close magnetic coupling between two sources from their equivalent models. This paper also shows how theoretical developments of large loop antennas have evolved from the van Veen antenna, a model with only two degrees of freedom, to a more complex model in terms of degrees, order, and types of harmonics. In parallel, it describes developments in the measurement method that provides input to the theoretical model. To illustrate how the research has evolved, we discuss coupling between two complex sources to assess the accuracy of this predictive method.
Auto-regressive model of magnetic signature for non-invasive fault location in power systems
2015 - NETO, J.A.O.; SARTORI, C.A.F.; BLANCO, E.; HUILLERY, J.
Complete identification for near-field multipolar expansion of electromagnetic sources
2014 - HOANG, THI Q.V.; BREARD, ARNAUD; VOLLAIRE, CHRISTIAN; KRAHENBUHL, LAURENT; SARTORI, CARLOS A.F.
A comparative study of large loop antennas regarding the evaluation of equivalent radiation sources
2014 - CARDIA, DANIEL V.F.; SEKO, MURILO H.; SARTORI, CARLOS A.F.; BARBIN, SILVIO E.
EMC aspects in a steel structure by lightning
1995 - SARTORI, C.A.F.; CARDOSO, J.R.
A method for calculating the current distribution and magnetic field around a lightning stroked structure
1994 - SARTORI, C.A.F.; CARDOSO, J.R.
Pulse magnetic field immunity international standard and the impact on design. Consideration of a magnetic field modeling as a helpful tool
1996 - SARTORI, C.A.F.; CARDOSO, J.R.