Study on magnetic damper composed of combined magnets (magnetic damper composed of basic halbach magnet arrays)

Research output: Contribution to journalArticle

Abstract

The damping force of a magnetic damper is based on the Lorentz force. That is to say, the magnetic damping force is generated in the direction opposite to the relative motion of a conductor with respect to a magnet. Normally, a magnetic damper uses two conducting plates facing the opposite sides of a magnet. If only one side of the magnet is used, the magnetic damping force is less. In the present work, a new magnetic damper composed of Halbach magnet arrays arranged in three parallel lines is proposed. A basic Halbach magnet array consists of five magnet cubes that are glued in the specific directions relative to each other, and is characterized as having a strong magnetic field on one side and a weak field on the other. For this reason, it is possible to realize a high-performance magnetic damper using only one side of a magnet. The magnetic fields of the Halbach magnet arrays of the new magnetic damper we are proposing, together with other magnet arrays, were investigated analytically using Biot-Savart's Law. Furthermore, the proposed magnetic damper was fabricated and tested. The experimental results were compared with the analytical results. As a result, the effectiveness of the new magnetic damper was confirmed.

Original languageEnglish
Pages (from-to)1691-1700
Number of pages10
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume78
Issue number789
DOIs
Publication statusPublished - Jun 18 2012

Fingerprint

Magnets
Damping
Magnetic fields
Lorentz force

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

@article{7d8eb6a26bb14c80a8fbca084c0221c2,
title = "Study on magnetic damper composed of combined magnets (magnetic damper composed of basic halbach magnet arrays)",
abstract = "The damping force of a magnetic damper is based on the Lorentz force. That is to say, the magnetic damping force is generated in the direction opposite to the relative motion of a conductor with respect to a magnet. Normally, a magnetic damper uses two conducting plates facing the opposite sides of a magnet. If only one side of the magnet is used, the magnetic damping force is less. In the present work, a new magnetic damper composed of Halbach magnet arrays arranged in three parallel lines is proposed. A basic Halbach magnet array consists of five magnet cubes that are glued in the specific directions relative to each other, and is characterized as having a strong magnetic field on one side and a weak field on the other. For this reason, it is possible to realize a high-performance magnetic damper using only one side of a magnet. The magnetic fields of the Halbach magnet arrays of the new magnetic damper we are proposing, together with other magnet arrays, were investigated analytically using Biot-Savart's Law. Furthermore, the proposed magnetic damper was fabricated and tested. The experimental results were compared with the analytical results. As a result, the effectiveness of the new magnetic damper was confirmed.",
author = "Takahiro Kimura and Yoshihisa Takayama and Takahiro Kondou and Shinya Kijimoto",
year = "2012",
month = "6",
day = "18",
doi = "10.1299/kikaic.78.1691",
language = "English",
volume = "78",
pages = "1691--1700",
journal = "Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C",
issn = "0387-5024",
publisher = "The Japan Society of Mechanical Engineers",
number = "789",

}

TY - JOUR

T1 - Study on magnetic damper composed of combined magnets (magnetic damper composed of basic halbach magnet arrays)

AU - Kimura, Takahiro

AU - Takayama, Yoshihisa

AU - Kondou, Takahiro

AU - Kijimoto, Shinya

PY - 2012/6/18

Y1 - 2012/6/18

N2 - The damping force of a magnetic damper is based on the Lorentz force. That is to say, the magnetic damping force is generated in the direction opposite to the relative motion of a conductor with respect to a magnet. Normally, a magnetic damper uses two conducting plates facing the opposite sides of a magnet. If only one side of the magnet is used, the magnetic damping force is less. In the present work, a new magnetic damper composed of Halbach magnet arrays arranged in three parallel lines is proposed. A basic Halbach magnet array consists of five magnet cubes that are glued in the specific directions relative to each other, and is characterized as having a strong magnetic field on one side and a weak field on the other. For this reason, it is possible to realize a high-performance magnetic damper using only one side of a magnet. The magnetic fields of the Halbach magnet arrays of the new magnetic damper we are proposing, together with other magnet arrays, were investigated analytically using Biot-Savart's Law. Furthermore, the proposed magnetic damper was fabricated and tested. The experimental results were compared with the analytical results. As a result, the effectiveness of the new magnetic damper was confirmed.

AB - The damping force of a magnetic damper is based on the Lorentz force. That is to say, the magnetic damping force is generated in the direction opposite to the relative motion of a conductor with respect to a magnet. Normally, a magnetic damper uses two conducting plates facing the opposite sides of a magnet. If only one side of the magnet is used, the magnetic damping force is less. In the present work, a new magnetic damper composed of Halbach magnet arrays arranged in three parallel lines is proposed. A basic Halbach magnet array consists of five magnet cubes that are glued in the specific directions relative to each other, and is characterized as having a strong magnetic field on one side and a weak field on the other. For this reason, it is possible to realize a high-performance magnetic damper using only one side of a magnet. The magnetic fields of the Halbach magnet arrays of the new magnetic damper we are proposing, together with other magnet arrays, were investigated analytically using Biot-Savart's Law. Furthermore, the proposed magnetic damper was fabricated and tested. The experimental results were compared with the analytical results. As a result, the effectiveness of the new magnetic damper was confirmed.

UR - http://www.scopus.com/inward/record.url?scp=84862186269&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862186269&partnerID=8YFLogxK

U2 - 10.1299/kikaic.78.1691

DO - 10.1299/kikaic.78.1691

M3 - Article

AN - SCOPUS:84862186269

VL - 78

SP - 1691

EP - 1700

JO - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

JF - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

SN - 0387-5024

IS - 789

ER -