JP4758629B2 - 極片のないマルチリング式永久磁石並びにその製作方法 - Google Patents

極片のないマルチリング式永久磁石並びにその製作方法 Download PDF

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Publication number
JP4758629B2
JP4758629B2 JP2004280787A JP2004280787A JP4758629B2 JP 4758629 B2 JP4758629 B2 JP 4758629B2 JP 2004280787 A JP2004280787 A JP 2004280787A JP 2004280787 A JP2004280787 A JP 2004280787A JP 4758629 B2 JP4758629 B2 JP 4758629B2
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Japan
Prior art keywords
permanent magnet
section
hollow ring
assembly
imaging
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Expired - Fee Related
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JP2004280787A
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Japanese (ja)
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JP2005109487A (ja
JP2005109487A5 (https=
Inventor
キャスリーン・メラニー・アン
エバンゲロス・トリフォン・ラスカリス
ポール・シャドフォース・トンプソン
ブレント・アクセル
ブルース・キャンベル・アン
マイケル・アンソニー・パルモ，ジュニア
ヨハネス・マルチヌス・ファン・オールト
シャンルイ・ファン
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General Electric Co
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General Electric Co
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Publication of JP2005109487A5 publication Critical patent/JP2005109487A5/ja
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Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/128—Encapsulating, encasing or sealing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273—Imparting anisotropy
    • H01F41/028—Radial anisotropy
    • 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

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)
JP2004280787A 2003-09-29 2004-09-28 極片のないマルチリング式永久磁石並びにその製作方法 Expired - Fee Related JP4758629B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/672,658 2003-09-29
US10/672,658 US7423431B2 (en) 2003-09-29 2003-09-29 Multiple ring polefaceless permanent magnet and method of making

Publications (3)

Publication Number Publication Date
JP2005109487A JP2005109487A (ja) 2005-04-21
JP2005109487A5 JP2005109487A5 (https=) 2009-11-12
JP4758629B2 true JP4758629B2 (ja) 2011-08-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004280787A Expired - Fee Related JP4758629B2 (ja) 2003-09-29 2004-09-28 極片のないマルチリング式永久磁石並びにその製作方法

Country Status (4)

Country Link
US (1) US7423431B2 (https=)
JP (1) JP4758629B2 (https=)
CN (1) CN100444290C (https=)
IT (1) ITMI20041679A1 (https=)

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US10224135B2 (en) 2016-08-08 2019-03-05 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
US11287497B2 (en) 2016-08-08 2022-03-29 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
US11988730B2 (en) 2016-08-08 2024-05-21 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
US10627464B2 (en) 2016-11-22 2020-04-21 Hyperfine Research, Inc. Low-field magnetic resonance imaging methods and apparatus
JP2019535424A (ja) 2016-11-22 2019-12-12 ハイパーファイン リサーチ，インコーポレイテッド 磁気共鳴画像における自動検出のためのシステムおよび方法
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US20210405137A1 (en) 2018-11-29 2021-12-30 Epsitau Ltd. Lightweight asymmetric magnet arrays with mixed-phase magnet rings
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Also Published As

Publication number Publication date
ITMI20041679A1 (it) 2004-11-30
JP2005109487A (ja) 2005-04-21
US20050068138A1 (en) 2005-03-31
CN100444290C (zh) 2008-12-17
CN1602805A (zh) 2005-04-06
US7423431B2 (en) 2008-09-09

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