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Design of a linear Halbach magnetic damper
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering.ORCID iD: 0000-0002-3448-7246
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering. ABB AB Corporate Research, Västerås 722 26, Sweden.ORCID iD: 0000-0003-3515-3536
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering.
2018 (English)In: International journal of applied electromagnetics and mechanics, ISSN 1383-5416, E-ISSN 1875-8800, Vol. 59, no 2, p. 1-9Article in journal (Refereed) Published
Abstract [en]

Ultra-fast circuit breakers are operated with fast electromagnetic actuators. They can generate a sufficient impulse 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. A parametric study is performed to understand the effect of load mass and incoming velocities. It was found that the magnetic field modulation plays an important role on the damping performance. 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 that are used to create the Halbach magnet array.

Place, publisher, year, edition, pages
IOS Press, 2018. Vol. 59, no 2, p. 1-9
Keywords [en]
Halbach magnet array, magnetic damper, permanent magnet, FEM (finite element method), circuit breaker, radial component of magnetic flux density
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-240656DOI: 10.3233/JAE-171039ISI: 000462267600022Scopus ID: 2-s2.0-85063334924OAI: oai:DiVA.org:kth-240656DiVA, id: diva2:1274081
Note

QC 20190128

Available from: 2018-12-27 Created: 2018-12-27 Last updated: 2019-04-23Bibliographically approved

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Magnusson, JesperEngdahl, Göran

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