Electrostatic stabilizer for a passive magnetic bearing system

Title: Electrostatic stabilizer for a passive magnetic bearing system

Electrostatic stabilizers are provided for passive bearing systems composed of annular magnets having a net positive stiffness against radial displacements and that have a negative stiffness for vertical displacements, resulting in a vertical instability. Further embodiments are shown of a radial electrostatic stabilizer geometry (using circuitry similar to that employed in the vertical stabilizer). This version is suitable for stabilizing radial (lateral) displacements of a rotor that is levitated by annular permanent magnets that are stable against vertical displacements but are unstable against radial displacements.

Inventors:: Post, Richard F

Issue Date:: 2016-10-11

OSTI Identifier:: 1328695

Assignee:: Lawrence Livermore National Security, LLC (Livermore, CA) LLNL

Patent Number(s):: 9,464,670

Application Number:: 14/928,729

Contract Number:: AC52-07NA27344

Resource Relation:: Patent File Date: 2015 Oct 30

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

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

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Other works cited in this record:

Dynamically stable magnetic suspension/bearing system
patent, February 1996

Post, Richard F.
US Patent Document 5,495,221
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN/5495221

Passive magnetic bearing element with minimal power losses
patent, December 1998

Post, Richard F.
US Patent Document 5,847,480
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN/5847480

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