JP4145248B2 - 永久磁石式磁界発生装置 - Google Patents
永久磁石式磁界発生装置 Download PDFInfo
- Publication number
- JP4145248B2 JP4145248B2 JP2004013746A JP2004013746A JP4145248B2 JP 4145248 B2 JP4145248 B2 JP 4145248B2 JP 2004013746 A JP2004013746 A JP 2004013746A JP 2004013746 A JP2004013746 A JP 2004013746A JP 4145248 B2 JP4145248 B2 JP 4145248B2
- Authority
- JP
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- Prior art keywords
- magnetic field
- permanent magnet
- field generator
- axis
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005291 magnetic effect Effects 0.000 title claims description 199
- 230000007246 mechanism Effects 0.000 claims description 29
- 230000005415 magnetization Effects 0.000 claims description 7
- 230000005294 ferromagnetic effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 12
- 238000005457 optimization Methods 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910052761 rare earth metal Inorganic materials 0.000 description 7
- 239000003302 ferromagnetic material Substances 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- -1 neodymium rare earth Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
Halbach,K., Design of permanent magnet multipole magnets with oriented rare earth cobalt material, Nuclear Instruments and Methods,vol.169,1980,pp.1-10
1)磁場均一度=(均一空間内の最大磁場−最小磁場)/均一空間内の磁場平均値×100[%]
2)スキュー角=tan-1(副生成(X軸方向)の磁場成分/主磁場(Y軸方向)成分)
2 外縁部ヨーク
3 磁場評価空間
101〜124 永久磁石片
204、206 磁場調整機構
301、302 電極
303、304 電源
Claims (4)
- 環状に配置された複数の永久磁石片を含み、環の内部空間に実質的に一方向の磁界を発生する永久磁石式磁界発生装置であって、各永久磁石片の着磁方向が環の半周で1回転し、各永久磁石片が実質的に同じ強度の磁力を有し、各永久磁石片の外径側と該環の中心軸との距離が同一であり、該永久磁石片の内径側が該中心軸に向けて凹凸を有する形状である永久磁石式磁界発生装置。
- 前記中心軸をZ軸とし、前記環の中心を通り前記一方向の磁界と平行な軸をY軸とし、該中心を通りZ軸およびY軸に垂直な軸をX軸とした場合、前記凹凸が、XY面、YZ面およびZX面の少なくとも1に対して対称である請求項1に記載の永久磁石式磁界発生装置。
- 前記凹凸のうち凹部に磁場調整機構をさらに含む請求項1または2に記載の永久磁石式磁界発生装置。
- 前記磁場調整機構が、強磁性体または磁石である請求項3に記載の永久磁石式磁界発生装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004013746A JP4145248B2 (ja) | 2004-01-22 | 2004-01-22 | 永久磁石式磁界発生装置 |
EP05250269.7A EP1557848B1 (en) | 2004-01-22 | 2005-01-20 | Permanent magnet type magnetic field generating apparatus |
EP14192736.8A EP2863401B1 (en) | 2004-01-22 | 2005-01-20 | Permanent magnet type magnetic field generating apparatus |
US11/038,857 US7760059B2 (en) | 2004-01-22 | 2005-01-20 | Permanent magnet type magnetic field generating apparatus |
TW094101896A TW200531097A (en) | 2004-01-22 | 2005-01-21 | Permanent magnet type magnetic field generating apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004013746A JP4145248B2 (ja) | 2004-01-22 | 2004-01-22 | 永久磁石式磁界発生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005204849A JP2005204849A (ja) | 2005-08-04 |
JP4145248B2 true JP4145248B2 (ja) | 2008-09-03 |
Family
ID=34631916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004013746A Expired - Fee Related JP4145248B2 (ja) | 2004-01-22 | 2004-01-22 | 永久磁石式磁界発生装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7760059B2 (ja) |
EP (2) | EP1557848B1 (ja) |
JP (1) | JP4145248B2 (ja) |
TW (1) | TW200531097A (ja) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070018764A1 (en) * | 2005-07-19 | 2007-01-25 | Analisi Tecnologica Innovadora Per A Processos | Device and method for separating magnetic particles |
JP4237786B2 (ja) * | 2006-09-27 | 2009-03-11 | 株式会社日立製作所 | 核磁気共鳴信号用ソレノイドコイル及び核磁気共鳴用プローブ |
US20080121515A1 (en) * | 2006-11-27 | 2008-05-29 | Seagate Technology Llc | Magnetron sputtering utilizing halbach magnet arrays |
DE102007031745B4 (de) * | 2007-07-06 | 2013-04-25 | Max Baermann Gmbh | Magnetsystem zur Erzeugung homogener Magnetfelder |
DE102008014578B3 (de) | 2008-03-14 | 2009-11-26 | Bruker Axs Microanalysis Gmbh | Streufeldarme Magnetfalle sowie diese enthaltender Röntgendetektor |
EP2144076B1 (en) * | 2008-07-07 | 2012-05-23 | RWTH Aachen | Segmented ring magnet arrangement for providing a magnetic field |
KR20100099054A (ko) | 2009-03-02 | 2010-09-10 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 영구 자석식 자계 발생 장치 |
FR2949604B1 (fr) * | 2009-08-28 | 2012-03-02 | Commissariat Energie Atomique | Structure aimantee axisymetrique induisant en son centre un champ homogene d'orientation predeterminee |
FR2949602A1 (fr) * | 2009-08-28 | 2011-03-04 | Commissariat Energie Atomique | Dispositif d'aimant permanent cylindrique produisant un champ magnetique controle a une distance de sa surface |
US9041230B2 (en) * | 2009-12-15 | 2015-05-26 | University Of Florida Research Foundation, Inc. | Method and apparatus for motional/vibrational energy harvesting via electromagnetic induction using a magnet array |
US8828032B2 (en) | 2010-01-05 | 2014-09-09 | GI Windows, Inc. | Methods and apparatus for magnet-induced compression anastomosis between adjacent organs |
US8870898B2 (en) | 2010-01-05 | 2014-10-28 | GI Windows, Inc. | Self-assembling magnetic anastomosis device having an exoskeleton |
JP5623368B2 (ja) * | 2010-11-05 | 2014-11-12 | 信越化学工業株式会社 | ダイポールリング磁気回路 |
CA2884097C (en) | 2014-03-13 | 2020-04-21 | LT Imaging Inc. | Magnetic resonance imaging (mri) system and method |
JP2017521223A (ja) | 2014-07-23 | 2017-08-03 | ジーアイ ウィンドウズ, インコーポレイテッド | 磁気吻合デバイスおよび送達の方法 |
CN104252944A (zh) * | 2014-09-22 | 2014-12-31 | 苏州露宇电子科技有限公司 | 高磁场均匀度、高温度稳定性的单边环形磁体 |
EP3297545A1 (en) | 2015-05-08 | 2018-03-28 | GI Windows Inc. | Systems, devices, and methods for forming anastomoses |
MX2018011524A (es) * | 2016-03-22 | 2019-07-04 | Hyperfine Res Inc | Métodos y aparato para adaptar campos magnéticos. |
WO2019232527A1 (en) | 2018-06-02 | 2019-12-05 | G.I. Windows, Inc. | Systems, devices, and methods for forming anastomoses |
DE102018214213A1 (de) * | 2018-08-22 | 2020-02-27 | Bruker Biospin Gmbh | Permanentmagnetanordnung zur Erzeugung eines homogenen Feldes ("3D-Halbach") |
JP2024516146A (ja) | 2021-04-20 | 2024-04-12 | ジーアイ ウィンドウズ, インコーポレイテッド | 内視鏡または腹腔鏡磁気ナビゲーション用のシステム、装置および方法 |
CN114267514B (zh) * | 2021-11-29 | 2023-11-14 | 深圳航天科技创新研究院 | 用于磁共振成像的流线形磁体结构 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62126603A (ja) | 1985-11-27 | 1987-06-08 | Asahi Chem Ind Co Ltd | 磁界発生装置 |
USH693H (en) * | 1989-02-24 | 1989-10-03 | The United States Of America As Represented By The Secretary Of The Army | PYX twister with superconducting confinement |
US4862128A (en) * | 1989-04-27 | 1989-08-29 | The United States Of America As Represented By The Secretary Of The Army | Field adjustable transverse flux sources |
JP2596836B2 (ja) * | 1989-08-28 | 1997-04-02 | 信越化学工業株式会社 | 磁場発生装置 |
JPH03257159A (ja) * | 1990-03-05 | 1991-11-15 | Shin Etsu Chem Co Ltd | ダイポールリング型磁気回路を用いたスパッタ装置 |
JPH0422336A (ja) | 1990-05-18 | 1992-01-27 | Shin Etsu Chem Co Ltd | 磁場発生装置 |
US5055812A (en) * | 1990-09-24 | 1991-10-08 | The United States Of America As Represented By The Secretary Of The Army. | Compensation for magnetic nonuniformities of permanent magnet structures |
EP0479278B1 (en) * | 1990-10-04 | 1998-01-21 | Shin-Etsu Chemical Co., Ltd. | Cylindrical magnet apparatus suitable for nmr imaging |
JPH04146605A (ja) * | 1990-10-09 | 1992-05-20 | Shin Etsu Chem Co Ltd | 磁場発生装置 |
JPH05143972A (ja) | 1991-11-19 | 1993-06-11 | Kubota Corp | 金属薄膜型磁気記録媒体およびその製造法 |
DE4227503A1 (de) * | 1992-08-20 | 1994-02-24 | Vacuumschmelze Gmbh | Permanentmagnetsystem zur Erzeugung homogener Felder und Verfahren zu seiner Magnetisierung |
US5456769A (en) * | 1993-03-10 | 1995-10-10 | Kabushiki Kaisha Toshiba | Magnetic material |
US5750044A (en) * | 1994-07-12 | 1998-05-12 | Tdk Corporation | Magnet and bonded magnet |
US5523732A (en) * | 1995-10-16 | 1996-06-04 | The United States Of America As Represented By The Secretary Of The Army | Multi-mode adjustable magic ring |
US5659250A (en) * | 1996-03-19 | 1997-08-19 | Intermagnetics General Corporation | Full brick construction of magnet assembly having a central bore |
JPH1187119A (ja) | 1997-09-01 | 1999-03-30 | Yaskawa Electric Corp | 表面処理膜付磁石 |
CN1144240C (zh) * | 1998-03-27 | 2004-03-31 | 东芝株式会社 | 磁性材料 |
JP3892996B2 (ja) * | 1999-09-02 | 2007-03-14 | 東京エレクトロン株式会社 | マグネトロンプラズマ処理装置 |
JP2001156044A (ja) * | 1999-11-26 | 2001-06-08 | Tokyo Electron Ltd | 処理装置及び処理方法 |
EP1383143B1 (en) | 2001-04-24 | 2016-08-17 | Asahi Kasei Kabushiki Kaisha | Method of producing a solid material for magnet |
-
2004
- 2004-01-22 JP JP2004013746A patent/JP4145248B2/ja not_active Expired - Fee Related
-
2005
- 2005-01-20 EP EP05250269.7A patent/EP1557848B1/en not_active Expired - Fee Related
- 2005-01-20 EP EP14192736.8A patent/EP2863401B1/en not_active Expired - Fee Related
- 2005-01-20 US US11/038,857 patent/US7760059B2/en not_active Expired - Fee Related
- 2005-01-21 TW TW094101896A patent/TW200531097A/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US20050162250A1 (en) | 2005-07-28 |
EP2863401B1 (en) | 2018-06-06 |
EP1557848A3 (en) | 2009-12-30 |
TW200531097A (en) | 2005-09-16 |
TWI367509B (ja) | 2012-07-01 |
EP1557848A2 (en) | 2005-07-27 |
EP2863401A1 (en) | 2015-04-22 |
US7760059B2 (en) | 2010-07-20 |
JP2005204849A (ja) | 2005-08-04 |
EP1557848B1 (en) | 2015-09-02 |
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