CARLOS ANTONIO FRANCA SARTORI
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Artigo IPEN-doc 27564 Robust filter design technique to limit resonance in long cables connected to power converters2020 - BADE, TAMIRIS G.; ROUDET, JAMES; GUICHON, JEAN-MICHEL; KUO-PENG, PATRICK; SARTORI, CARLOS A.F.A novel numerical analysis to characterize and to visualize the resonance behavior in a long cable is proposed. The resonance-due maximum amplification, and the frequency and position to which the maximum occurs, are represented in function of the load connected to the cable terminal in a 3-D plot here denominated “resonance surface response.” This analysis is based on a white box modeling and allows the design of protective measures against the resonance phenomenon, such as filter design, protection against cross-talk, adequate voltage insulation choice, etc. One of these applications is exemplified: the design of an output filter for a power converter connected to a long cable, from which the results are compared to a classical design of the same filter to highlight the advantages and demonstrate the robustness of the proposed technique.Artigo IPEN-doc 24245 Error analysis for near-field EMC problems based on multipolar expansion approach2017 - 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.Artigo IPEN-doc 23037 Overview on the evolution of near magnetic field coupling prediction using equivalent multipole spherical harmonic sources2017 - 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, DAMIENIn 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.