Open AccessTime domain inverse method based on the near field technique to solve electromagnetic interference problems: application to an AC/DC flyback converter
Author(s) -
Zitouna Bessem,
Ben Hadj Slama Jaleleddine
Publication year - 2018
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5157
Subject(s) - superposition principle , interference (communication) , time domain , frequency domain , power (physics) , flyback converter , field (mathematics) , electromagnetic field , computer science , electronic engineering , inverse problem , inverse , physics , engineering , mathematics , mathematical analysis , telecommunications , boost converter , geometry , channel (broadcasting) , quantum mechanics , pure mathematics , computer vision
This study presents a time domain modelling method for sources of electromagnetic disturbance. For the identification of an equivalent model, the proposed method is based on the synchronised temporal measurements of the magnetic near field above a power electronic system. To determine the parameters of the model, the proposed methodology is combined with an optimisation method based on the genetic algorithms. Unlike the classical approaches developed in the frequency domain, the proposed method allows finding a valid equivalent model for all radiation frequencies of measured time signals. It also enables knowing the phase shift in time between the radiating sources. The proposed method is applied in order to find the equivalent radiating sources of an AC/DC flyback converter. The accuracy and precision of the proposed method are validated by the good agreement between the measured cartography of the magnetic near field and that calculated using the parameters of the developed model. Finally, the latter's parameters are used to predict the cartography of other components of the magnetic field, which will be compared with the measured cartography. The superposition of the results confirms that the identified equivalent sources can represent real sources in the studied structure.