Adaptive Compensation of Magnetic Fields Inside an Open Cylindrical Magnetic Shield

Kenji Nagashima, Ichiro Sasada, Kunihisa Tashiro

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

For the development of a magnetic field compensation system suited for the open end of the cylindrical magnetic shell, magnetic field distributions were characterized on the axis of the magnetic shell for the externally impressed low-frequency ac magnetic field and for the compensating magnetic field generated by a set of ring coils. Based on this observation, a system for actively compensating the magnetic field leakage through the opening is proposed. A cylindrical magnetic shield of desk-top size was constructed by combining an axial shell made of 2-in-wide Metglas 2705M amorphous tapes encircling the outer surface of a cylindrical body in its axial direction, with a magnetic shaking coil, and then a proposed compensation system was built on top of the structure. The axial shielding factor was improved with this active compensation system by 55 times for a 2-Hz impressed magnetic field, 20 times for a 10-Hz impressed field, ten times for a 30-Hz impressed field, and five times for a 50-Hz impressed field. An interesting phenomenon observed during the characterization of the magnetic fields is that the magnetic field in the space inside the axial magnetic shell leads in phase with respect to that of the impressed magnetic field, unlike the case with a helical shell where the magnetic field is lagging in phase. A model for explaining this phenomenon is also given.

元の言語英語
ページ(範囲)3223-3225
ページ数3
ジャーナルIEEE Transactions on Magnetics
39
発行部数5 II
DOI
出版物ステータス出版済み - 9 1 2003

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Magnetic fields
magnetic fields
coils
cylindrical bodies
Compensation and Redress
shaking
Shielding
Tapes
tapes
shielding
leakage
low frequencies
rings

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

これを引用

Adaptive Compensation of Magnetic Fields Inside an Open Cylindrical Magnetic Shield. / Nagashima, Kenji; Sasada, Ichiro; Tashiro, Kunihisa.

:: IEEE Transactions on Magnetics, 巻 39, 番号 5 II, 01.09.2003, p. 3223-3225.

研究成果: ジャーナルへの寄稿記事

Nagashima, Kenji ; Sasada, Ichiro ; Tashiro, Kunihisa. / Adaptive Compensation of Magnetic Fields Inside an Open Cylindrical Magnetic Shield. :: IEEE Transactions on Magnetics. 2003 ; 巻 39, 番号 5 II. pp. 3223-3225.
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