PLF Design for DC-DC Converters Based on Accurate IL Estimations

Marco Bosi, Albert-Miquel Sánchez, Francisco Javier Pajares, Alessandro Campanini and Lorenzo Peretto ()
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Marco Bosi: Wavecontrol SL, Carrer de Pallars 65, 08014 Barcelona, Spain
Albert-Miquel Sánchez: EMZER Technological Solutions SL, Carrer de Pallars 65, 08014 Barcelona, Spain
Francisco Javier Pajares: EMZER Technological Solutions SL, Carrer de Pallars 65, 08014 Barcelona, Spain
Alessandro Campanini: Department of Electrical, Electronic and Information Engineering, Guglielmo Marconi Alma Mater Studiorum, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy
Lorenzo Peretto: Department of Electrical, Electronic and Information Engineering, Guglielmo Marconi Alma Mater Studiorum, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy

Energies, 2023, vol. 16, issue 5, 1-18

Abstract: Even though today’s electromagnetic compatibility (EMC) standards and measurement techniques set specific limitations and a clear methodology to measure the conducted emissions (CE) of equipment under tests (EUTs), the design methodology of a suitable power-line filter (PLF) to solve non-compliance is, in general, neither accurate nor efficient. This is due to different reasons, such as unknown actual load and line impedances, unknown dominant mode in the CE, and/or inappropriate instrumentation for the appropriate measurements. The objective of this paper is to investigate if different topologies of switching mode power supplies (SMPSs) lead to different PLF structures. For the sake of exemplification, the analysis is focused on switched-mode DC-DC converters. From an EMC point of view, these devices can be completely modeled by means of Scattering (S)–parameter and CE measurements. Additionally, an analysis of their circuit models has been performed to allow a better comprehension of their characterization. In this paper, the circuit models of three different types of DC-DC converters are presented, and their component values (including nonlinearities and parasitic effects introduced by the actual behavior of the circuit elements) are estimated using the S-parameter characterization. Then, a new methodology for PLF design, based on accurate insertion loss (IL) estimations, is applied to obtain the optimal PLF for one of the converters. This methodology is experimentally tested and validated.

Keywords: power line filter; filter design; S-parameters; EMC; conducted emissions; common mode (CM); differential mode (DM) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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