GB2317717A - Magnetic suspension system - Google Patents

Magnetic suspension system

Info

Publication number
GB2317717A
GB2317717A GB9726305A GB9726305A GB2317717A GB 2317717 A GB2317717 A GB 2317717A GB 9726305 A GB9726305 A GB 9726305A GB 9726305 A GB9726305 A GB 9726305A GB 2317717 A GB2317717 A GB 2317717A
Authority
GB
United Kingdom
Prior art keywords
coil
permanent magnet
field
suspension system
held
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
GB9726305A
Other versions
GB9726305D0 (en
GB2317717B (en
Inventor
Nabeel Shirazee
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.)
Magnetic Patent Holdings Ltd
Original Assignee
Magnetic Patent Holdings Ltd
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 GBGB9517911.5A external-priority patent/GB9517911D0/en
Priority claimed from GBGB9605925.8A external-priority patent/GB9605925D0/en
Priority claimed from GBGB9610927.7A external-priority patent/GB9610927D0/en
Priority claimed from GBGB9613061.2A external-priority patent/GB9613061D0/en
Application filed by Magnetic Patent Holdings Ltd filed Critical Magnetic Patent Holdings Ltd
Priority to GB9726305A priority Critical patent/GB2317717B/en
Publication of GB9726305D0 publication Critical patent/GB9726305D0/en
Publication of GB2317717A publication Critical patent/GB2317717A/en
Application granted granted Critical
Publication of GB2317717B publication Critical patent/GB2317717B/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
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • 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
    • F16C32/044—Active magnetic bearings
    • F16C32/0444—Details of devices to control the actuation of the electromagnets
    • F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

A suspension system for magnetically suspending an object (O) comprises an electromagnetic coil (L) having an axially extending core (13) of magnetically permeable material and a permanent magnet (14) disposed on its axis. A permanent magnet (10) is also provided in the object (O) and is arranged such that it is in attraction with the permanent magnet (14) on the coil (L), and with the magnetically permeable core (13) so that the object (O) is suspended at a position below the coil (L) by the attractive force. Sensors (15, 16) on the coil (L) detect the magnetic field of the permanent magnet (10) in the object (O), and provide signals to a control circuit, which applies current to the coil (L) to attract the object (O) when the detected field is below a predetermined limit and to repel the object when the detector field is above a predetermined limit. In this manner, the object (O) is held in position using a relatively low current, since the coil (L) is only energised when the object moves away from the position in which it is held by the field of the permanent magnets (10, 14).
GB9726305A 1995-09-02 1996-09-02 Magnetic suspension system Expired - Fee Related GB2317717B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9726305A GB2317717B (en) 1995-09-02 1996-09-02 Magnetic suspension system

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GBGB9517911.5A GB9517911D0 (en) 1995-09-02 1995-09-02 Magnetic suspension system
GBGB9605925.8A GB9605925D0 (en) 1995-09-02 1996-03-21 Magnetic suspension system
GBGB9610927.7A GB9610927D0 (en) 1995-09-02 1996-05-24 Magnetic suspension system
GBGB9613061.2A GB9613061D0 (en) 1995-09-02 1996-06-21 Magnetic suspension system
PCT/GB1996/002150 WO1997009540A1 (en) 1995-09-02 1996-09-02 Magnetic suspension system
GB9726305A GB2317717B (en) 1995-09-02 1996-09-02 Magnetic suspension system

Publications (3)

Publication Number Publication Date
GB9726305D0 GB9726305D0 (en) 1998-02-11
GB2317717A true GB2317717A (en) 1998-04-01
GB2317717B GB2317717B (en) 1998-05-27

Family

ID=27517308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9726305A Expired - Fee Related GB2317717B (en) 1995-09-02 1996-09-02 Magnetic suspension system

Country Status (1)

Country Link
GB (1) GB2317717B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405037A (en) * 2003-08-15 2005-02-16 Robert Francis Need Grazebrook Magnetic suspending device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107085A (en) * 1981-08-28 1983-04-20 Ritchie Gordon S Magnetic suspension
FR2586462A1 (en) * 1985-08-21 1987-02-27 Alsthom Device for magnetically supporting a load
US5003235A (en) * 1989-09-11 1991-03-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Single element magnetic suspension actuator
EP0473231A1 (en) * 1990-08-30 1992-03-04 Koninklijke Philips Electronics N.V. Electromagnetic support with unilateral control currents

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193664A1 (en) * 1985-03-05 1986-09-10 Levitron International, Limited Magnetic levitation system
DE4210741C2 (en) * 1992-04-01 1995-12-14 Forschungszentrum Juelich Gmbh Magnetic mounting of a lighting fixture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107085A (en) * 1981-08-28 1983-04-20 Ritchie Gordon S Magnetic suspension
FR2586462A1 (en) * 1985-08-21 1987-02-27 Alsthom Device for magnetically supporting a load
US5003235A (en) * 1989-09-11 1991-03-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Single element magnetic suspension actuator
EP0473231A1 (en) * 1990-08-30 1992-03-04 Koninklijke Philips Electronics N.V. Electromagnetic support with unilateral control currents

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405037A (en) * 2003-08-15 2005-02-16 Robert Francis Need Grazebrook Magnetic suspending device
GB2405037B (en) * 2003-08-15 2006-08-30 Robert Francis Need Grazebrook Improvements to magnetic suspending device

Also Published As

Publication number Publication date
GB9726305D0 (en) 1998-02-11
GB2317717B (en) 1998-05-27

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110902