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Home > Thèses et HDR > Thèses en 2019

19/12/2019 - Meriem AMARA

by Laurent Krähenbühl - published on , updated on

Sous réserve de la délivrance de l’autorisation de soutenance :

Meriem Amara defends his PhD on Dec. 19, 2019 at 02:30 PM.
Place : Ecole Centrale de Lyon, Bâtiment W1, Amphi 201.

Title : Control of conducted emissions of power electronics

Jury :
Rapporteurs :
- Mme Edith Clavel, G2ELab
- M. Bertrand Revol, Safran Tech
Autres membres :
- Mme Françoise Paladian, Institut Pascal
- M. Nadir Idir, L2EP
- M. François Costa, Satie
- M. Marwan Ali, Safran Tech
- M. Christian Vollaire, Ampère
- M. Arnaud Bréard, Ampère

Abstract :
This thesis is focused on the black box EMC modeling of a three-phase inverter for aerospace applications. The work performed in this thesis is carried out in the framework of DGAC project (Directorate General of Civil Aviation) titled MECEP (Control of conducted emissions of power electronics).
To protect the network board from the conducted electromagnetic interferences and to meet the EMC standards and especially the aviation standard “DO160F”, an EMC filter is absolutely necessary for each power converter. This disturbance levels generated by this type of system require careful design to ensure the filtering of parasitic currents that propagate in common mode (CM) and differential mode (DM). Therefore, the work of this thesis is devoted to the study of a generic EMC modeling, rapid and able to represent correctly the electromagnetic behavior of the converter from the side of the DC network and from the side of the AC load. This modeling is based on a “black box” representation. The identified EMC model contains disturbance sources and equivalent CM and DM impedances. This type of model is validated for two standard drive chains of 4 kW. It is able to predict the impact of different parameters such as the operating point, the network impedance and the load impedance in the frequency domain. A good agreement is obtained in all cases up to a frequency of 50 MHz
Finally, the proposed EMC modeling, which represents the electromagnetic behavior of the DC input side of the converter, is extended to represent the AC output side behavior.
The main advantages of the proposed “black box” EMC modeling are the rapidity, the simplicity and the construction without the knowledge of the internal structure of the converter. That can be protected by the industrial secret.

Key Words : Electromagnetic Compatibility (EMC), power converter, common mode conducted noise emissions, differential mode conducted noise emissions, EMC modeling, black box.