CA2278510A1 - Electrodynamic magnetic bearing - Google Patents

Electrodynamic magnetic bearing Download PDF

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Publication number
CA2278510A1
CA2278510A1 CA002278510A CA2278510A CA2278510A1 CA 2278510 A1 CA2278510 A1 CA 2278510A1 CA 002278510 A CA002278510 A CA 002278510A CA 2278510 A CA2278510 A CA 2278510A CA 2278510 A1 CA2278510 A1 CA 2278510A1
Authority
CA
Canada
Prior art keywords
rotational
rotation symmetric
magnetic
stator
rotor
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.)
Granted
Application number
CA002278510A
Other languages
French (fr)
Other versions
CA2278510C (en
Inventor
Torbjorn Lembke
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.)
Magnetal AB
Original Assignee
Magnetal Ab
Torbjorn Lembke
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
Application filed by Magnetal Ab, Torbjorn Lembke filed Critical Magnetal Ab
Publication of CA2278510A1 publication Critical patent/CA2278510A1/en
Application granted granted Critical
Publication of CA2278510C publication Critical patent/CA2278510C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0436—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

Device for magnetic suspension of a rotor (10, 20, 30) in relative rotational movement along a predetermined rotation symmetric path with respect to a stator (14, 24, 26, 34, 36). Rotor (10, 20, 30) comprises a rotational body (11, 21, 31) which essentially consists of an electrically conductive unmagnetic material. Fitted at the stator (14, 24, 26, 34, 36) is at least one magnetic means (12, 22, 25, 32, 35), which comprises at least one rotation symmetric magnet (12, 22, 25, 32, 35) concentric with the rotational axis. The magnetic means is disposed to give rise to a rotation symmetric magnetic field concentric with the rotational axis. When and only when the rotational body (11, 21, 31) tends to leave the predetermined path and rotate eccentric, the magnetic field generates induced eddy currents in the rotational body (11, 21, 31), said eddy currents give rise to restoring stabilising forces.
CA002278510A 1997-01-28 1998-01-23 Electrodynamic magnetic bearing Expired - Fee Related CA2278510C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9700255A SE508442C2 (en) 1997-01-28 1997-01-28 Electrodynamic magnetic bearing
SE9700255-4 1997-01-28
PCT/SE1998/000100 WO1998032981A1 (en) 1997-01-28 1998-01-23 Electrodynamic magnetic bearing

Publications (2)

Publication Number Publication Date
CA2278510A1 true CA2278510A1 (en) 1998-07-30
CA2278510C CA2278510C (en) 2007-10-16

Family

ID=20405555

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002278510A Expired - Fee Related CA2278510C (en) 1997-01-28 1998-01-23 Electrodynamic magnetic bearing

Country Status (10)

Country Link
US (1) US6118199A (en)
EP (1) EP0956457B1 (en)
JP (1) JP3057047B2 (en)
AU (1) AU5788198A (en)
CA (1) CA2278510C (en)
DE (1) DE69823647T2 (en)
MY (1) MY118179A (en)
SE (1) SE508442C2 (en)
TW (1) TW471568U (en)
WO (1) WO1998032981A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19823630C2 (en) * 1998-05-27 2003-08-21 Pmdm Prec Motors Deutsche Mine Motor bearings for fast rotating small motors
US6416215B1 (en) 1999-12-14 2002-07-09 University Of Kentucky Research Foundation Pumping or mixing system using a levitating magnetic element
US6758593B1 (en) 2000-10-09 2004-07-06 Levtech, Inc. Pumping or mixing system using a levitating magnetic element, related system components, and related methods
US7086778B2 (en) * 2000-10-09 2006-08-08 Levtech, Inc. System using a levitating, rotating pumping or mixing element and related methods
US6469411B2 (en) * 2000-12-15 2002-10-22 Magnetal Ab Compliant foil fluid film bearing with eddy current damper
US6641378B2 (en) * 2001-11-13 2003-11-04 William D. Davis Pump with electrodynamically supported impeller
AU2003241444A1 (en) 2003-05-15 2005-01-21 William Davis Pump with magnetic bearings
DE10333733A1 (en) * 2003-07-23 2005-02-24 Forschungszentrum Jülich GmbH Magnetic bearing element for machines with high numbers of revolutions, has ring-shaped permanent magnets encased in a carbon fiber binding band and separated at several points
JP5155186B2 (en) 2006-01-13 2013-02-27 ハートウェア、インコーポレイテッド Rotary blood pump
US8672611B2 (en) 2006-01-13 2014-03-18 Heartware, Inc. Stabilizing drive for contactless rotary blood pump impeller
DE102007036692A1 (en) 2006-09-22 2008-03-27 Ebm-Papst St. Georgen Gmbh & Co. Kg Fan
DE102007020274B4 (en) * 2007-04-30 2009-04-02 Siemens Ag Measuring system for detecting a rotary-linear movement and corresponding rotary linear drive
JP2009014084A (en) * 2007-07-03 2009-01-22 Jtekt Corp Bearing device and centrifugal compressor having the same
US20100109463A1 (en) * 2008-10-31 2010-05-06 University Of Virginia Patent Foundation Hybrid Five Axis Magnetic Bearing System Using Axial Passive PM Bearing Magnet Paths and Radial Active Magnetic Bearings with Permanent Magnet Bias and Related Method
EP2490796B1 (en) * 2009-10-21 2023-09-20 Metenova Holding AB Device for stirring
DE102010041328A1 (en) 2010-09-24 2012-03-29 Siemens Aktiengesellschaft Apparatus and method for damped, non-contact storage of a coolant supply for superconducting machines
PL394800A1 (en) 2011-05-06 2012-11-19 Pawel Krzysztof Licznerski Magnetic bearing and magnetic bearing mode of action
EP2887022B1 (en) 2013-12-20 2016-09-07 Skf Magnetic Mechatronics Rotor sensor target for magnetic bearings
US9739307B2 (en) 2014-11-28 2017-08-22 Lawrence Livermore National Security, Llc Non-contacting “snubber bearing” for passive magnetic bearing systems
CN108286569A (en) * 2018-01-17 2018-07-17 上海浩灵磁电器件有限公司 Eccentric outer shroud Horizontal permanent-magnetic bearing

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US611809A (en) * 1898-10-04 eyershed
DE1933031C3 (en) * 1969-06-30 1978-10-26 Karl 5170 Juelich Boden Magnetic storage
US3611815A (en) * 1969-12-24 1971-10-12 Us Navy Frictionless gyroscope
US3885504A (en) * 1971-01-09 1975-05-27 Max Baermann Magnetic stabilizing or suspension system
US3779618A (en) * 1971-02-26 1973-12-18 Comitato Naz Per I Engergia Nu Self-centering magnetic suspension
US3811740A (en) * 1971-04-24 1974-05-21 Cnen Self-centering rotary magnetic suspension device
DE2160666B2 (en) * 1971-12-07 1973-09-27 Siemens Ag, 1000 Berlin U. 8000 Muenchen Electrodynamic magnet system for levitating a moving vehicle
US3937148A (en) * 1973-01-02 1976-02-10 Cambridge Thermionic Corporation Virtually zero power linear magnetic bearing
US3955858A (en) * 1974-01-03 1976-05-11 Societe Nationale Industrielle Aerospatiale Satellite momentum wheel
DE2401625A1 (en) * 1974-01-14 1975-07-24 Siemens Ag MAGNETIC SYSTEM FOR CONTACT-FREE GUIDANCE OF A MOVING VEHICLE
JPS58109719A (en) * 1981-12-23 1983-06-30 Hitachi Ltd Magnetic bearing
US4700094A (en) * 1984-12-17 1987-10-13 The Charles Stark Draper Laboratory, Inc. Magnetic suspension system
FR2598866A1 (en) * 1986-05-14 1987-11-20 Alsthom ELECTROMAGNETIC SUPPORT DEVICE
US5469006A (en) * 1992-09-25 1995-11-21 Magnetic Bearing Technologies, Inc. Lorentz force magnetic bearing utilizing closed conductive loops and selectively controlled electromagnets
SE9203090L (en) * 1992-10-22 1994-04-18 Torbjoern Lembke Eddy current inducing magnetic bearings and use of the bearing
US5396136A (en) * 1992-10-28 1995-03-07 Sri International Magnetic field levitation
JP3961032B2 (en) * 1993-12-13 2007-08-15 シーメンス アクチエンゲゼルシヤフト Magnetic bearing device for rotor shaft
US5495221A (en) * 1994-03-09 1996-02-27 The Regents Of The University Of California Dynamically stable magnetic suspension/bearing system
US5783885A (en) * 1995-08-07 1998-07-21 The Regents Of The University Of California Self-adjusting magnetic bearing systems

Also Published As

Publication number Publication date
SE9700255D0 (en) 1997-01-28
DE69823647D1 (en) 2004-06-09
AU5788198A (en) 1998-08-18
TW471568U (en) 2002-01-01
CA2278510C (en) 2007-10-16
JP3057047B2 (en) 2000-06-26
WO1998032981A1 (en) 1998-07-30
EP0956457A1 (en) 1999-11-17
MY118179A (en) 2004-09-30
SE9700255L (en) 1998-07-29
JPH10281158A (en) 1998-10-20
DE69823647T2 (en) 2005-04-21
SE508442C2 (en) 1998-10-05
EP0956457B1 (en) 2004-05-06
US6118199A (en) 2000-09-12

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Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20180123