An efficient full-wave solver for eddy currents

Research output: Contribution to journalArticlepeer-review


An integral equation reformulation of the Maxwell transmission problem is presented. The reformulation uses techniques such as tuning of free parameters and augmentation of close-to-rank-deficient operators. It is designed for the eddy current regime and works both for surfaces of genus 0 and 1. Well-conditioned systems and field representations are obtained despite the Maxwell transmission problem being ill-conditioned for genus 1 surfaces due to the presence of Neumann eigenfields. Furthermore, it is shown that these eigenfields, for ordinary conductors in the eddy current regime, are different from the classical Neumann eigenfields for superconductors. Numerical examples, based on the reformulation, give an unprecedented 13-digit accuracy both for transmitted and scattered fields.

Original languageEnglish
Pages (from-to)145-162
Number of pages18
JournalComputers and Mathematics with Applications
Publication statusPublished - 2022 Dec

Subject classification (UKÄ)

  • Computational Mathematics
  • Other Electrical Engineering, Electronic Engineering, Information Engineering

Free keywords

  • Boundary integral equation
  • Eddy current
  • Low-frequency breakdown
  • Maxwell transmission problem
  • Neumann eigenfield


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