Topology optimized permanent magnet systems

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Abstract

Topology optimization of permanent magnet systems consisting of permanent magnets, high permeability iron and air is presented. An implementation of topology optimization for magnetostatics is discussed and three examples are considered. The Halbach cylinder is topology optimized with iron and an increase of 15% in magnetic efficiency is shown. A topology optimized structure to concentrate a homogeneous field is shown to increase the magnitude of the field by 111%. Finally, a permanent magnet with alternating high and low field regions is topology optimized and a ΛcoolΛcool figure of merit of 0.472 is reached, which is an increase of 100% compared to a previous optimized design.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume437
Pages (from-to)78-85
ISSN0304-8853
DOIs
Publication statusPublished - 2017

Keywords

  • Topology optimization
  • Halbach cylinder
  • Magnetic field
  • Permanent magnet flux sources
  • Magnetic efficiency

Cite this

@article{9b26110ecb6e4510b6fb750cddffd832,
title = "Topology optimized permanent magnet systems",
abstract = "Topology optimization of permanent magnet systems consisting of permanent magnets, high permeability iron and air is presented. An implementation of topology optimization for magnetostatics is discussed and three examples are considered. The Halbach cylinder is topology optimized with iron and an increase of 15{\%} in magnetic efficiency is shown. A topology optimized structure to concentrate a homogeneous field is shown to increase the magnitude of the field by 111{\%}. Finally, a permanent magnet with alternating high and low field regions is topology optimized and a ΛcoolΛcool figure of merit of 0.472 is reached, which is an increase of 100{\%} compared to a previous optimized design.",
keywords = "Topology optimization, Halbach cylinder, Magnetic field, Permanent magnet flux sources, Magnetic efficiency",
author = "Rasmus Bj{\o}rk and Christian Bahl and Insinga, {Andrea Roberto}",
year = "2017",
doi = "10.1016/j.jmmm.2017.04.028",
language = "English",
volume = "437",
pages = "78--85",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",

}

Topology optimized permanent magnet systems. / Bjørk, Rasmus; Bahl, Christian; Insinga, Andrea Roberto.

In: Journal of Magnetism and Magnetic Materials, Vol. 437, 2017, p. 78-85.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Topology optimized permanent magnet systems

AU - Bjørk, Rasmus

AU - Bahl, Christian

AU - Insinga, Andrea Roberto

PY - 2017

Y1 - 2017

N2 - Topology optimization of permanent magnet systems consisting of permanent magnets, high permeability iron and air is presented. An implementation of topology optimization for magnetostatics is discussed and three examples are considered. The Halbach cylinder is topology optimized with iron and an increase of 15% in magnetic efficiency is shown. A topology optimized structure to concentrate a homogeneous field is shown to increase the magnitude of the field by 111%. Finally, a permanent magnet with alternating high and low field regions is topology optimized and a ΛcoolΛcool figure of merit of 0.472 is reached, which is an increase of 100% compared to a previous optimized design.

AB - Topology optimization of permanent magnet systems consisting of permanent magnets, high permeability iron and air is presented. An implementation of topology optimization for magnetostatics is discussed and three examples are considered. The Halbach cylinder is topology optimized with iron and an increase of 15% in magnetic efficiency is shown. A topology optimized structure to concentrate a homogeneous field is shown to increase the magnitude of the field by 111%. Finally, a permanent magnet with alternating high and low field regions is topology optimized and a ΛcoolΛcool figure of merit of 0.472 is reached, which is an increase of 100% compared to a previous optimized design.

KW - Topology optimization

KW - Halbach cylinder

KW - Magnetic field

KW - Permanent magnet flux sources

KW - Magnetic efficiency

U2 - 10.1016/j.jmmm.2017.04.028

DO - 10.1016/j.jmmm.2017.04.028

M3 - Journal article

VL - 437

SP - 78

EP - 85

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -