CA2219503C - Fluides aimantes a aimantation a saturation elevee - Google Patents

Fluides aimantes a aimantation a saturation elevee Download PDF

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Publication number
CA2219503C
CA2219503C CA002219503A CA2219503A CA2219503C CA 2219503 C CA2219503 C CA 2219503C CA 002219503 A CA002219503 A CA 002219503A CA 2219503 A CA2219503 A CA 2219503A CA 2219503 C CA2219503 C CA 2219503C
Authority
CA
Canada
Prior art keywords
magnetofluid
particles
modified
volume
concentration
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
Application number
CA002219503A
Other languages
English (en)
Other versions
CA2219503A1 (fr
Inventor
Thomas Hahndel
Arnim Nethe
Johannes Muller
Norbert Buske
Armin Rehfeld
Hanns-Dietrich Stahlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19654864A external-priority patent/DE19654864A1/de
Priority claimed from DE19609281A external-priority patent/DE19609281C1/de
Application filed by Individual filed Critical Individual
Publication of CA2219503A1 publication Critical patent/CA2219503A1/fr
Application granted granted Critical
Publication of CA2219503C publication Critical patent/CA2219503C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
    • H01F1/442—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a metal or alloy, e.g. Fe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/90—Details not provided for in groups A61M60/40, A61M60/50 or A61M60/80
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Power Engineering (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Mechanical Engineering (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Soft Magnetic Materials (AREA)
  • Lubricants (AREA)
  • Hard Magnetic Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

L'invention vise à créer un fluide magnétique présentant une aimantation à saturation élevée, dont la concentration de saturation est supérieure à 100 mT afin de permettre le transfert de forces supérieures. A cet effet, on forme des dispersions stables de particules nanométriques et de cobalt modifiées par des couches d'adsorption monomoléculaires, dans des fluides de support, la concentration volumique des composants ferromagnétiques étant comprise entre 5 et 35 %, de préférence entre 15 et 30 %, et la concentration volumique des particules modifiées (particules nues avec enrobage d'adsorption) atteignant jusqu'à 50 % en volume.
CA002219503A 1996-02-27 1997-02-27 Fluides aimantes a aimantation a saturation elevee Expired - Fee Related CA2219503C (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19609281.7 1996-02-27
DE19654864A DE19654864A1 (de) 1996-02-27 1996-02-27 Magnetofluid mit einer Sättigungsmagnetisierung von 150 bis 450 mT
DE19654864.0 1996-02-27
DE19609281A DE19609281C1 (de) 1996-02-27 1996-02-27 Magnetofluidunterstützter elektromagnetischer Antrieb für eine Blutpumpe zur Unterstützung oder zum teilweisen bis totalen Ersatz des Herzens
PCT/DE1997/000443 WO1997032321A1 (fr) 1996-02-27 1997-02-27 Fluide magnetique presentant une aimantation a saturation elevee

Publications (2)

Publication Number Publication Date
CA2219503A1 CA2219503A1 (fr) 1997-09-04
CA2219503C true CA2219503C (fr) 2001-04-24

Family

ID=26023644

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002219503A Expired - Fee Related CA2219503C (fr) 1996-02-27 1997-02-27 Fluides aimantes a aimantation a saturation elevee

Country Status (3)

Country Link
EP (1) EP0823123A1 (fr)
CA (1) CA2219503C (fr)
WO (1) WO1997032321A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230081426A (ko) * 2021-11-30 2023-06-07 현대자동차주식회사 유도모터의 엔드 코일 냉각구조

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284358A (en) * 1963-06-10 1966-11-08 Chevron Res Process for improving the magnetic properties of colloidal dispersion of magnetic particles
JPS6043803A (ja) * 1983-08-19 1985-03-08 Pioneer Electronic Corp 磁性流体
JPS6293911A (ja) * 1985-10-21 1987-04-30 Natl Res Inst For Metals 磁性流体の製造装置
JPS6293910A (ja) * 1985-10-21 1987-04-30 Natl Res Inst For Metals 磁性流体の製造方法
JP2623500B2 (ja) * 1988-04-02 1997-06-25 コスモ石油株式会社 磁性流体の製造方法

Also Published As

Publication number Publication date
CA2219503A1 (fr) 1997-09-04
WO1997032321A1 (fr) 1997-09-04
EP0823123A1 (fr) 1998-02-11

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