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Title: Transverse-displacement stabilizer for passive magnetic bearing systems

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:
Issue Date:
OSTI Identifier:
1345984
Assignee:
Lawrence Livermore National Security, LLC LLNL
Patent Number(s):
9,590,469
Application Number:
14/628,018
Contract Number:
AC52-07NA27344
Resource Relation:
Patent File Date: 2015 Feb 20
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Other works cited in this record:

Electromagnetic Suspension and Positioning Device With Inherent Dynamical Stability In Three Dimensions
patent, March 1971

High temperature superconducting magnetic bearings
patent, January 1993

Magnetic bearing and method utilizing movable closed conductive loops
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Passive null flux coil magnetic bearing system for translation or rotation
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Dynamically stable magnetic suspension/bearing system
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High-temperature superconducting magnetic bearing
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Passive magnetic bearing element with minimal power losses
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High intensity radial field magnetic array and actuator
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patent, March 2005

Passive magnetic bearing for a motor-generator
patent, July 2006

Magnetic bearing element with adjustable stiffness
patent, November 2013

Passive magnetic bearing system
patent, September 2014

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