Toroidal Nanocrystalline Powder Core with Trapezoidal Cross Section

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

1 Scopus Citations
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Author(s)

  • Xinru Li
  • Luke Shillaber
  • Zhichao Luo
  • Xufu Ren
  • Borong Hu
  • Teng Long

Related Research Unit(s)

Detail(s)

Original languageEnglish
Journal / PublicationIEEE Transactions on Magnetics
Publication statusOnline published - 16 Jun 2023

Abstract

This paper introduces a toroidal nanocrystalline powder core with a trapezoidal cross section. The non-uniform magnetic flux distribution of toroidal cores with different cross sectional geometries is discussed, the inductance equations are derived, and the geometrical optimisation factor is given in order to retain the highest possible inductance value whilst minimising material usage. A 10-turn coil is wound on the core, with the measured inductance values showing a good match with both FEM and mathematical calculation. The near-field electromagnetic interference (EMI) radiation in close proximity to the inductor is investigated by both FEM and experimental validation, and the toroidal core with a trapezoidal cross section has shown reduced EMI. By adopting a trapezoidal cross section for the toroidal core, a 30 % reduction in material usage and lower EMI are achieved, albeit with a compromise of 14% in inductance. © 2023 IEEE.

Research Area(s)

  • electromagnetic interference, Electromagnetic interference, Finite element analysis, high-frequency magnetics, Inductance, Inductors, Magnetic cores, Permeability, Powders, soft magnetic composites, Toroidal inductor

Citation Format(s)

Toroidal Nanocrystalline Powder Core with Trapezoidal Cross Section. / Li, Xinru; Shillaber, Luke; Luo, Zhichao et al.
In: IEEE Transactions on Magnetics, 16.06.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review