A topology optimized switchable permanent magnet system

R. Bjørk; A. R. Insinga

doi:10.1016/j.jmmm.2018.05.076

A topology optimized switchable permanent magnet system

R. Bjørk^*, A. R. Insinga

^*Corresponding author for this work

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

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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 language	English
Journal	Journal of Magnetism and Magnetic Materials
Volume	465
Pages (from-to)	106-113
ISSN	0304-8853
DOIs	https://doi.org/10.1016/j.jmmm.2018.05.076
Publication status	Published - 2018

Keywords

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

Access to Document

10.1016/j.jmmm.2018.05.076

Topop switchAccepted author manuscript, 3.17 MBLicence: CC BY-NC-ND

Cite this

Bjørk, R., & Insinga, A. R. (2018). A topology optimized switchable permanent magnet system. Journal of Magnetism and Magnetic Materials, 465, 106-113. https://doi.org/10.1016/j.jmmm.2018.05.076

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AU - Insinga, A. R.

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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.

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KW - Magnetic field

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