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A Short Note on the Optimization of Halbach Arrays Used as Magnetic Springs
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0003-4740-1832
2015 (English)In: Proceedings of PIERS 2015 in Prague, July 6-9, 2015, The Electromagnetics Academy , 2015, 1328-1332 p.Conference paper (Refereed)
Abstract [en]

Modern neodymium magnets are today widely used for a wide variety of purposes and some commercial types have an adhesive capability of approximately 100 kg even though the dimensions are only 5 ∗ 5 ∗ 2.5 cm. Therefore the idea of using permanent magnets as springs isn’t uncommon. Here, the specific magnetization scheme often described as a “Halbach array” is analyzed in the use as elements of a magnetic spring. The Halbach array has (ideally) a one sided flux and here both analytical methods using Maxwell’s stress tensor and numerical simulations using FEMM are applied to calculate the restorative force created for two such opposing magnetic structures. This vertical force is highly dependent upon the dimensions of the structures and the magnetization wavelengths in the materials. Thus, varying these parameters will greatly affect the characteristics of the magnetic spring (e.g., spring stiffness, maximum restorative force etc.). Different applications will require different physical dimensions and magnetization wavelengths in the material.

Place, publisher, year, edition, pages
The Electromagnetics Academy , 2015. 1328-1332 p.
, PIERS Proceedings, Progress In Electromagnetics Research Symposium, ISSN 1559-9450
Keyword [en]
Halbach array, magnetic spring
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-171963ScopusID: 2-s2.0-84947204844OAI: diva2:845013
PIERS, Progress In Electromagnetics Research Symposium Prague, Czech Republic, July 6-9, 2015

QC 20150828

Available from: 2015-08-10 Created: 2015-08-10 Last updated: 2015-08-28Bibliographically approved

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Månsson, Daniel
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