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Article Dans Une Revue IEEE Transactions on Electromagnetic Compatibility Année : 2020

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

Résumé

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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Dates et versions

hal-02522867 , version 1 (28-07-2020)

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Citer

Sassia Hedia, Bessem Zitouna, Jaleleddine Ben Hadj Slama, Lionel Pichon. Electromagnetic Time Reversal in the Near Field: Characterization of Transient Disturbances in Power Electronics. IEEE Transactions on Electromagnetic Compatibility, 2020, 62 (5), pp.1869-1878. ⟨10.1109/TEMC.2020.2965735⟩. ⟨hal-02522867⟩
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