A topology optimized switchable permanent magnet system

R. Bjørk*, A. R. Insinga

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The design of a magnetic field source that can switch from a high field to a low field configuration by rotation by 90°90° of a set of iron pieces is investigated using topology optimization. A Halbach cylinder is considered as the magnetic field source and iron inserts are placed in the air gap of the Halbach cylinder. The ideal shape of these iron inserts is determined as function of the field generated by the Halbach cylinder and as function of the size of the iron segments. The topology optimized structures are parabolic shaped pieces and have a difference in flux density between the high and low positions that is on average 1.29 times higher than optimized regular pole pieces. The maximum increase is a factor of 2.08 times higher than the regular pole pieces.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume465
Pages (from-to)106-113
ISSN0304-8853
DOIs
Publication statusPublished - 2018

Keywords

  • Topology optimization
  • Halbach cylinder
  • Magnetic field
  • Permanent magnet flux sources
  • Switchable field source

Cite this

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title = "A topology optimized switchable permanent magnet system",
abstract = "The design of a magnetic field source that can switch from a high field to a low field configuration by rotation by 90°90° of a set of iron pieces is investigated using topology optimization. A Halbach cylinder is considered as the magnetic field source and iron inserts are placed in the air gap of the Halbach cylinder. The ideal shape of these iron inserts is determined as function of the field generated by the Halbach cylinder and as function of the size of the iron segments. The topology optimized structures are parabolic shaped pieces and have a difference in flux density between the high and low positions that is on average 1.29 times higher than optimized regular pole pieces. The maximum increase is a factor of 2.08 times higher than the regular pole pieces.",
keywords = "Topology optimization, Halbach cylinder, Magnetic field, Permanent magnet flux sources, Switchable field source",
author = "R. Bj{\o}rk and Insinga, {A. R.}",
year = "2018",
doi = "10.1016/j.jmmm.2018.05.076",
language = "English",
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journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
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}

A topology optimized switchable permanent magnet system. / Bjørk, R.; Insinga, A. R.

In: Journal of Magnetism and Magnetic Materials, Vol. 465, 2018, p. 106-113.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A topology optimized switchable permanent magnet system

AU - Bjørk, R.

AU - Insinga, A. R.

PY - 2018

Y1 - 2018

N2 - The design of a magnetic field source that can switch from a high field to a low field configuration by rotation by 90°90° of a set of iron pieces is investigated using topology optimization. A Halbach cylinder is considered as the magnetic field source and iron inserts are placed in the air gap of the Halbach cylinder. The ideal shape of these iron inserts is determined as function of the field generated by the Halbach cylinder and as function of the size of the iron segments. The topology optimized structures are parabolic shaped pieces and have a difference in flux density between the high and low positions that is on average 1.29 times higher than optimized regular pole pieces. The maximum increase is a factor of 2.08 times higher than the regular pole pieces.

AB - The design of a magnetic field source that can switch from a high field to a low field configuration by rotation by 90°90° of a set of iron pieces is investigated using topology optimization. A Halbach cylinder is considered as the magnetic field source and iron inserts are placed in the air gap of the Halbach cylinder. The ideal shape of these iron inserts is determined as function of the field generated by the Halbach cylinder and as function of the size of the iron segments. The topology optimized structures are parabolic shaped pieces and have a difference in flux density between the high and low positions that is on average 1.29 times higher than optimized regular pole pieces. The maximum increase is a factor of 2.08 times higher than the regular pole pieces.

KW - Topology optimization

KW - Halbach cylinder

KW - Magnetic field

KW - Permanent magnet flux sources

KW - Switchable field source

U2 - 10.1016/j.jmmm.2018.05.076

DO - 10.1016/j.jmmm.2018.05.076

M3 - Journal article

VL - 465

SP - 106

EP - 113

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -