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New Measurement System of Magnetic Near-Field With Multipolar Expansion Approach

Abstract : In the electromagnetic compatibility (EMC) behavior of power electronic converters, it is important to predict the near-field coupling between the complex components (e.g., in EMC filter). Using the components of the near-field multipolar expansion of electromagnetic sources, the close magnetic coupling between two elements is determined from their equivalent model. In this paper, a new measurement system, based on spherical harmonics and spatial filtering, is proposed and studied. The sensor is a single coil moving along one axis, and coupled with a rotatable mount for the measured source with two axes of rotation θ and φ. This simple system, which can be easily automated, allows building good accuracy models for complex sources. The impact of the uncertainties in the position and orientation of the source and sensor is studied in order to determine the higher degree of the multipolar expansion that can be characterized. Taken into account these uncertainties and the expected precision of the reconstructed source, strategies of measurement minimizing the number of measurements are compared.
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Submitted on : Thursday, May 26, 2016 - 8:36:51 PM
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Arnaud Bréard, François Tavernier, Zhao Li, Laurent Krähenbühl. New Measurement System of Magnetic Near-Field With Multipolar Expansion Approach. IEEE Transactions on Magnetics, Institute of Electrical and Electronics Engineers, 2016, 52 (3), ⟨10.1109/TMAG.2015.2501024⟩. ⟨hal-01322299⟩



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