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This paper describes the approach developed in order to model the electromagnetic response of a cable bundle, part of the electrical wiring interconnection system of a real aircraft, submitted to an external electromagnetic excitation. The aim of this study is to highlight the main challenges in the synthetic modeling and validation of a fully real setup, from the electromagnetic compatibility point of view. Both conducted and radiated excitations have been considered in the electromagnetic global model. The solution is obtained through a cooperative simulation approach involving one 3-D full-wave solver and a multiconductor transmission line solver. The results are compared with measurements and specific tools, such as feature selective validation and integrated error against log frequency, are used to assess the adequacy of the results. Index Terms-Electrical wiring interconnection system (EWIS), field-to-transmission-line (Field-to-TL), high intensity radiated field (HIRF), integral equations, method of moments (MoM), multiconductor transmission-line networks (MTLN).

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This article deals with circuit modeling of power systems and more particularly of DC/AC converters used for controlling electric motors. The objective of the model is to be able to assess conducted emission currents at both inputs and outputs in order to apply appropriate mitigation design rules such as filtering. First, we propose a linear Thevenin block-model of the converter considering it as a 5-port linear black-box allowing possible interaction between the DC and AC ports. To this extent, the block-model is made of an impedance matrix and a Thevenin voltage generators vector. We also propose theoretical relationships allowing the processing of data in order to be able to generate this model from measurements. Then, we test the linear simplifications on a real DC/AC converter and compare the results to measurements. For this, S-parameter measurements in offmode and currents at the 5 ports in on-mode are used for the characterization of the model on a first test setup. The model is then applied and checked by comparing circuit simulated and measured current responses on a modified test setup for which the lengths of the connection cables are modified. Finally, the capability of this block-model to extrapolate by calculation the response of other installation configurations is showed considering the design of a filter and its insertion at input/output ports of the converter with much longer cables.