Apparatus and method for magnetically unloading a rotor bearing

Sanders, Seth Robert

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A01 - agriculture
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Title: Apparatus and method for magnetically unloading a rotor bearing

Abstract

An apparatus and method for unloading a rotor bearing is described. The apparatus includes an electromagnet for levitating the rotor. In one embodiment, a sensor of the magnetic field near the electromagnet is used to control the current to levitate the rotor. In another embodiment, a method is provided that includes rotating the rotor, increasing the current to levitate the rotor and decrease the gap between electromagnet and rotor, and then reducing the current to levitate the rotor with a minimal amount of electric power to the electromagnet.

Inventors:: Sanders, Seth Robert

Issue Date:: 2018-02-13

Research Org.:: Amber Kinetics, Inc., Union City, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1420774

Patent Number(s):: 9892839

Application Number:: 13/973,937

Assignee:: Amber Kinetics, Inc. (Union City, CA)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS

Show more

F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
F16C19/163 - {with angular contact}
F16C19/522 - {related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload}
F16C19/547 - {with two angular contact rolling bearings}
F16C2361/55 - Flywheel systems
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}
F16C32/0459 - {Details of the magnetic circuit}
F16C39/06 - using magnetic means

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
H01F7/0236 - {Magnetic suspension or levitation
H01F7/206 - {Electromagnets for lifting, handling or transporting of magnetic pieces or material

H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
H02K7/02 - Additional mass for increasing inertia, e.g. flywheels
H02K7/025 - {for power storage}
H02K7/09 - with magnetic bearings

Show less

DOE Contract Number:: FOA-0000036

Resource Type:: Patent

Resource Relation:: Patent File Date: 2013 Aug 22

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Sanders, Seth Robert. Apparatus and method for magnetically unloading a rotor bearing.  United States: N. p., 2018. 
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                    Sanders, Seth Robert. Apparatus and method for magnetically unloading a rotor bearing.  United States.

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                    Sanders, Seth Robert. Tue .  
        "Apparatus and method for magnetically unloading a rotor bearing".  United States.  https://www.osti.gov/servlets/purl/1420774.

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@article{osti_1420774,

  title        = {Apparatus and method for magnetically unloading a rotor bearing},

  author       = {Sanders, Seth Robert},

  abstractNote = {An apparatus and method for unloading a rotor bearing is described. The apparatus includes an electromagnet for levitating the rotor. In one embodiment, a sensor of the magnetic field near the electromagnet is used to control the current to levitate the rotor. In another embodiment, a method is provided that includes rotating the rotor, increasing the current to levitate the rotor and decrease the gap between electromagnet and rotor, and then reducing the current to levitate the rotor with a minimal amount of electric power to the electromagnet.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {2}

}

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Works referenced in this record:

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patent, June 1969

Slick, Fred S.
US Patent Document 3,447,239
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Similar Records

Title: Apparatus and method for magnetically unloading a rotor bearing

Abstract

Citation Formats

Preloading Means for Magneto Bearings patent, June 1969

Magnetic bearing and method utilizing movable closed conductive loops patent, April 1994

Magnetic bearing with closed loops which move in AC electromagnet field and/or which include capacitors patent, September 1994

Null flux magnetic bearing with cross-connected loop portions patent, November 1995

Magnetic bearing utilizing brushless generator patent, November 1996

Integrated motor/generator/flywheel utilizing a solid steel rotor patent, March 1998

Backup bearings for positive re-centering of magnetic bearings patent, May 1998

Magnetic bearing device patent, June 1998

High inertia inductor-alternator patent, July 1999

Magnetic bearing system including a control system for a flywheel and method for operating same patent, December 1999

High-efficiency inductor-alternator patent, September 2000

Step switch cycloconverter utilizing multi-tap armature patent, September 2000

Flywheel power supply having axial magnetic bearing for frictionless rotation patent, July 2001

Magnetic bearing device and magnetic bearing control device patent, August 2003

Combination mechanical and magnetic support for a flywheel power supply patent, October 2003

Flywheel system with tilt switch patent, March 2004

Axially free flywheel system patent, March 2004

Inductor alternator flywheel system patent, September 2004

Dual function, highly damped, structurally and thermally compliant auxiliary bearing assembly patent, July 2007

Transient energy systems and methods for use of the same patent, July 2008

Transient energy systems and methods for use of the same patent, September 2008

Transient energy systems and methods for use of the same patent, January 2010

Transient energy systems and methods for use of the same patent, July 2010

Electronic Control Device for Electromagnetic Unit patent-application, November 2007

Lift magnet mechanism for flywheel power storage systems patent-application, December 2008

Magnetic Bearing Device and Method patent-application, April 2009

Advanced Flywheel and Method patent-application, June 2010

Low-Cost Minimal-Loss Flywheel Battery patent-application, November 2010

Preloading Means for Magneto Bearings
patent, June 1969

Magnetic bearing and method utilizing movable closed conductive loops
patent, April 1994

Magnetic bearing with closed loops which move in AC electromagnet field and/or which include capacitors
patent, September 1994

Null flux magnetic bearing with cross-connected loop portions
patent, November 1995

Magnetic bearing utilizing brushless generator
patent, November 1996

Integrated motor/generator/flywheel utilizing a solid steel rotor
patent, March 1998

Backup bearings for positive re-centering of magnetic bearings
patent, May 1998

Magnetic bearing device
patent, June 1998

High inertia inductor-alternator
patent, July 1999

Magnetic bearing system including a control system for a flywheel and method for operating same
patent, December 1999

High-efficiency inductor-alternator
patent, September 2000

Step switch cycloconverter utilizing multi-tap armature
patent, September 2000

Flywheel power supply having axial magnetic bearing for frictionless rotation
patent, July 2001

Magnetic bearing device and magnetic bearing control device
patent, August 2003

Combination mechanical and magnetic support for a flywheel power supply
patent, October 2003

Flywheel system with tilt switch
patent, March 2004

Axially free flywheel system
patent, March 2004

Inductor alternator flywheel system
patent, September 2004

Dual function, highly damped, structurally and thermally compliant auxiliary bearing assembly
patent, July 2007

Transient energy systems and methods for use of the same
patent, July 2008

Transient energy systems and methods for use of the same
patent, September 2008

Transient energy systems and methods for use of the same
patent, January 2010

Transient energy systems and methods for use of the same
patent, July 2010

Electronic Control Device for Electromagnetic Unit
patent-application, November 2007

Lift magnet mechanism for flywheel power storage systems
patent-application, December 2008

Magnetic Bearing Device and Method
patent-application, April 2009

Advanced Flywheel and Method
patent-application, June 2010

Low-Cost Minimal-Loss Flywheel Battery
patent-application, November 2010