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Numerical modelling of PCB planar inductors: impact of 3D modelling on high-frequency copper loss evaluation

Numerical modelling of PCB planar inductors: impact of 3D modelling on high-frequency copper loss evaluation

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Loss values are key parameters for designing high-performance high-frequency magnetic components for power electronics (PE) converters. With the increase of PE switching frequencies, copper losses have to be precisely quantified, ideally until some megahertz. In the literature, many 2D numerical simulations based on finite element analysis (FEA) are performed for such computations. 3D FEA studies of planar components are still limited because of modelling problems, computational resources and computing time. In this study, quantitative comparisons between 2D and 3D simulation results for planar inductors are achieved focusing on copper loss computation. Results are compared in terms of simulation performances and accuracy. The aim of the study is to highlight benefits of 2D and 3D FEA simulations in order to choose the appropriate model according to the studied problem.

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