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Study of a linear Halbach passive magnetic damper
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3448-7246
ABB AB Corporate Research, Västerås, Sweden.
ABB AB Corporate Research, Västerås, Sweden.ORCID iD: 0000-0003-3515-3536
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
2017 (English)In: Magnetics Conference (INTERMAG), 2017 IEEE International, Dublin, Ireland: IEEE conference proceedings, 2017Conference paper, Published paper (Refereed)
Abstract [en]

High voltage ultra-fast circuit breakers are operated with fast actuators. They are capable of generating impulsive force to swiftly open electrical contacts in a couple of milliseconds. Opening of the contacts with high velocities implies a need for a timely and controllable damping. An efficient damping mechanism then is crucial to attain an appropriate actuation performance and secure a long lifetime. In this paper a finite element model of a Halbach magnet array based magnetic damper and a corresponding experimental prototype is described. It was found that a uniform and high radial component of the magnetic flux density is necessary in order to achieve high damping force. The radial magnetic field can be controlled via thickness and magnetization direction of the ring magnets which are used to create the Halbach magnet array. Finally, it is also shown that the concept provides a frictionless collision free damping demonstrating its potential to be used in fast circuit breakers.

Place, publisher, year, edition, pages
Dublin, Ireland: IEEE conference proceedings, 2017.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-214439DOI: 10.1109/INTMAG.2017.8008035ISBN: 978-1-5386-1086-2 (print)ISBN: 978-1-5386-1087-9 (print)OAI: oai:DiVA.org:kth-214439DiVA: diva2:1141076
Conference
IEEE Magnetics Conference (INTERMAG), 2017, 24-28 April 2017, Dublin, Ireland
Note

QC 20170918

Available from: 2017-09-13 Created: 2017-09-13 Last updated: 2017-10-12Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • de-DE
  • en-GB
  • en-US
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  • nn-NB
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  • Other locale
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Output format
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