Transverse-displacement stabilizer for passive magnetic bearing systems

Post, Richard F

Title: Transverse-displacement stabilizer for passive magnetic bearing systems

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Abstract

The invention provides a way re-center a rotor's central longitudinal rotational axis with a desired system longitudinal axis. A pair of planar semicircular permanent magnets are pieced together to form a circle. The flux from each magnet is pointed in in opposite directions that are both parallel with the rotational axis. A stationary shorted circular winding the plane of which is perpendicular to the system longitudinal axis and the center of curvature of the circular winding is positioned on the system longitudinal axis. Upon rotation of the rotor, when a transverse displacement of the rotational axis occurs relative to the system longitudinal axis, the winding will experience a time-varying magnetic flux such that an alternating current that is proportional to the displacement will flow in the winding. Such time-varying magnetic flux will provide a force that will bring the rotor back to its centered position about the desired axis.

Inventors:: Post, Richard F

Issue Date:: 2017-03-07

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1345984

Patent Number(s):: 9590469

Application Number:: 14/628,018

Assignee:: Lawrence Livermore National Security, LLC

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

H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES

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F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
F16C32/0408 - {Passive magnetic bearings}
F16C32/0436 - {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}

H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
H02K7/09 - with magnetic bearings

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DOE Contract Number:: AC52-07NA27344

Resource Type:: Patent

Resource Relation:: Patent File Date: 2015 Feb 20

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Post, Richard F. Transverse-displacement stabilizer for passive magnetic bearing systems.  United States: N. p., 2017. 
        Web.

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                    Post, Richard F. Transverse-displacement stabilizer for passive magnetic bearing systems.  United States.

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                    Post, Richard F. Tue .  
        "Transverse-displacement stabilizer for passive magnetic bearing systems".  United States.  https://www.osti.gov/servlets/purl/1345984.

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@article{osti_1345984,

  title        = {Transverse-displacement stabilizer for passive magnetic bearing systems},

  author       = {Post, Richard F},

  abstractNote = {The invention provides a way re-center a rotor's central longitudinal rotational axis with a desired system longitudinal axis. A pair of planar semicircular permanent magnets are pieced together to form a circle. The flux from each magnet is pointed in in opposite directions that are both parallel with the rotational axis. A stationary shorted circular winding the plane of which is perpendicular to the system longitudinal axis and the center of curvature of the circular winding is positioned on the system longitudinal axis. Upon rotation of the rotor, when a transverse displacement of the rotational axis occurs relative to the system longitudinal axis, the winding will experience a time-varying magnetic flux such that an alternating current that is proportional to the displacement will flow in the winding. Such time-varying magnetic flux will provide a force that will bring the rotor back to its centered position about the desired axis.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {3}

}

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