Electrostatic stabilizer for a passive magnetic bearing system
Abstract
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:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1328695
- Patent Number(s):
- 9464670
- Application Number:
- 14/928,729
- Assignee:
- Lawrence Livermore National Security, LLC (Livermore, CA)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
- DOE Contract Number:
- AC52-07NA27344
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2015 Oct 30
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Post, Richard F. Electrostatic stabilizer for a passive magnetic bearing system. United States: N. p., 2016.
Web.
Post, Richard F. Electrostatic stabilizer for a passive magnetic bearing system. United States.
Post, Richard F. Tue .
"Electrostatic stabilizer for a passive magnetic bearing system". United States. https://www.osti.gov/servlets/purl/1328695.
@article{osti_1328695,
title = {Electrostatic stabilizer for a passive magnetic bearing system},
author = {Post, Richard F},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {10}
}
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Works referenced in this record:
Dynamically stable magnetic suspension/bearing system
patent, February 1996
- Post, Richard F.
- US Patent Document 5,495,221
Passive magnetic bearing element with minimal power losses
patent, December 1998
- Post, Richard F.
- US Patent Document 5,847,480