Time domain inverse method based on the near field technique to solve electromagnetic interference problems: application to an AC/DC flyback converter

Zitouna, Bessem; Slama, Jaleleddine Ben Hadj

doi:10.1049/iet-pel.2018.5157

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…Further validation of the model is performed on other faces of the capacitor or other components as proposed in [4,23]. Hence, we measured the magnetic field cartography in the literal face and compared it to the one that has been calculated using the obtained model.…”

Section: Model Validationmentioning

confidence: 99%

Development of Generic Radiating Model for Rectangular Capacitors: Magnetic Near Fields Analysis and Modeling

Labiedh¹,

Zitouna²,

Tlig³

et al. 2022

Recent Topics in Electromagnetic Compatibility

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This chapter deals with modeling the radiation from rectangular film capacitors as a power electronics component. The rectangular film capacitors are sources of electromagnetic radiation, where its characterization is crucial for electronic circuits EMC. Our study presents the analyses and modeling of the magnetic near field radiated by the plastic and the polyester capacitors. An electromagnetic inverse method is combined with an optimization method based on genetic algorithms to create a radiating equivalent model. A very good agreement is observed between the magnetic near field cartography measured above the studied structure and calculated using the developed model parameters. Finally, a generic radiating model is proposed for various types of rectangular film capacitors. The generic model is validated using the measurements on a rectangular capacitor. The obtained equivalent model can calculate the magnetic field at any near field zone and far field around the capacitors. Circuit designers can use the field distribution to optimize the placement of the capacitors on the printed circuit board to reduce their coupling and potential interaction with other equipment in the vicinity of the system.

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Section: Model Validationmentioning

confidence: 99%

Development of Generic Radiating Model for Rectangular Capacitors: Magnetic Near Fields Analysis and Modeling

Labiedh¹,

Zitouna²,

Tlig³

et al. 2022

Recent Topics in Electromagnetic Compatibility

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“…In this work, the studied structure is a flyback AC/DC converter based on the principle of switched-mode power supplies (SMPS), as in [30]. Indeed, despite the superior efficiency that they can offer, these switching converters generate a lot of noise and EMI because of their high changing dv/dt and di/dt events.…”

Section: Device Under Test: Ac/dc Flyback Convertermentioning

confidence: 99%

Study of Electromagnetic Radiation Sources Using Time Reversal: Application to a Power Electronic Converter

Hedia¹,

Zitouna²,

Slama³

et al. 2022

Recent Topics in Electromagnetic Compatibility

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Recently, modern power electronic systems have been introduced in different applications, such as in avionics and wireless communication. The increasing technological complexity of these systems is posing serious challenges regarding electromagnetic compatibility (EMC) issues. Indeed, the radiation emitted from electronic circuits can induce harmful effects on nearby devices. Thus, several research works have been conducted using the nearfield technique to deal with electromagnetic interferences (EMI) that might occur, especially due to rapidly changing currents and voltages. In the present work, a detailed study about the characterization of the electromagnetic nearfield-radiated emissions is established using a time-domain analysis to provide an equivalent model constituted of a set of electromagnetic dipole parameters. Source reconstruction has been obtained using electromagnetic time reversal (EMTR), which has proven successful and efficient in identifying transient disturbance sources in power electronics. Experimental measurements of the magnetic nearfield have been carried out under an AC/DC flyback converter. The accuracy of the proposed method has been confirmed by visualizing measured magnetic field components, which are in good agreement with the calculated maps. The results of a reasonable computing time have shown that, particularly in transient signals with a wide frequency band, the suggested inverse method is an adequate alternative to overcome frequency domain limitations.

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“…For instance, a flyback circuit has several rapidly changing currents that need to be studied. In this work, the proposed method is applied to a flyback AC-DC converter based on the principle of switched-mode power supplies (SMPS), as in [33]. These power supplies present a high noise due to the switching frequency and can cause harmonic distortion.…”

Section: B Experimental Test 1) Configuration Of the Structure Undermentioning

confidence: 99%

Electromagnetic Time Reversal in the Near Field: Characterization of Transient Disturbances in Power Electronics

Hedia

Zitouna

Slama

et al. 2020

IEEE Trans. Electromagn. Compat.

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In the present paper, the electromagnetic time reversal technique (EMTR) is studied in the electromagnetic compatibility (EMC) context. The main issue addressed by this approach is to deal with EM radiating sources identification. This paper is intended to provide a time domain (TD) study of EMTR in the near field (NF) and prove its efficiency in characterizing transient disturbances in power electronics. The reconstruction of EM emissions is based on two stages. First, modeling process relies on the use of TD analytical expressions. Second, signal processing is referring to time reversal (TR) technique, which defines an inverse problem resolution. The method proposes to identify a set of equivalent dipoles. The validation is carried out experimentally using a TD measurement bench. The main purposes of this method is to extract the dipoles locations, moments and orientation. The magnetic field maps calculated at each time step using obtained equivalent sources are compared to measured distributions. Adequate agreement is achieved, which confirms the efficiency of the proposed method. In addition, for validation purposes, the equivalent model is compared to that obtained by a frequency domain (FD) method based on the standard genetic algorithms. Unlike FD, TD investigations allow characterizing transient disturbances in power electronic systems that emit strong EM interferences, by finding a sufficient equivalent model valid on a wide frequency band at once.

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Time domain inverse method based on the near field technique to solve electromagnetic interference problems: application to an AC/DC flyback converter

Cited by 8 publications

References 28 publications

Development of Generic Radiating Model for Rectangular Capacitors: Magnetic Near Fields Analysis and Modeling

Development of Generic Radiating Model for Rectangular Capacitors: Magnetic Near Fields Analysis and Modeling

Study of Electromagnetic Radiation Sources Using Time Reversal: Application to a Power Electronic Converter

Electromagnetic Time Reversal in the Near Field: Characterization of Transient Disturbances in Power Electronics

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