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<p>A probabilistic approach without domain discretization is presented to model eddy currents in AC-excited normal conducting coils. This method allows to determine the total AC power loss due to the altered current density distribution in the coil caused by the induced eddy currents. The probabilistic model presented is based on previously established iterative perturbation theory applied to the governing equations expressed as second order Greens function formulation. Application to the domain of interest is further pursued using the floating random walk Monte Carlo procedure. The effect of ferromagnetic material in the vicinity of the AC-excited coil on the power loss is determined using a model, previously developed by the authors. The new technique to simulate eddy current density distributions has been implemented on general-purpose Graphical Processing Units, where each processing core handles the solution of the governing equations at an independent and discrete location in the domain. The parallel processing of the developed eddy current simulation is significantly faster than standard finite element methods. The novel computational approach to determine power loss has been experimentally verified with an AC excited coil system.</p>

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Monte Carlo model to determine eddy currents in 3D winding configurations with and without ferromagnetic materials

  • 期刊论文

  • 发表日期：

    2025年5月3日

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  • Adwaith Ravichandran,
  • Rainer Meinke,
  • Hector Gutierrez

摘要

A probabilistic approach without domain discretization is presented to model eddy currents in AC-excited normal conducting coils. This method allows to determine the total AC power loss due to the altered current density distribution in the coil caused by the induced eddy currents. The probabilistic model presented is based on previously established iterative perturbation theory applied to the governing equations expressed as second order Greens function formulation. Application to the domain of interest is further pursued using the floating random walk Monte Carlo procedure. The effect of ferromagnetic material in the vicinity of the AC-excited coil on the power loss is determined using a model, previously developed by the authors. The new technique to simulate eddy current density distributions has been implemented on general-purpose Graphical Processing Units, where each processing core handles the solution of the governing equations at an independent and discrete location in the domain. The parallel processing of the developed eddy current simulation is significantly faster than standard finite element methods. The novel computational approach to determine power loss has been experimentally verified with an AC excited coil system.