Non-contacting "snubber bearing" for passive magnetic bearing systems

Title: Non-contacting "snubber bearing" for passive magnetic bearing systems

Abstract

A new non-contacting magnetic "snubber" bearing is provided for application to rotating systems such as vehicular electromechanical battery systems subject to frequent accelerations. The design is such that in the equilibrium position the drag force of the snubber is very small (milliwatts). However in a typical case, if the rotor is displaced by as little as 2 millimeters a large restoring force is generated without any physical contact between the stationary and rotating parts of the snubber bearing.

Inventors:: Post, Richard F

Issue Date:: 2017-08-22

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1376063

Patent Number(s):: 9739307

Application Number:: 14/556,029

Assignee:: Lawrence Livermore National Security, LLC

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

Show more

F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
F16C2361/55 - Flywheel systems
F16C32/0429 - {for both radial and axial load, e.g. conical magnets}
F16C15/00 - Construction of rotary bodies to resist centrifugal force
F16C32/0425 - {for radial load mainly}

Show less

DOE Contract Number:: AC52-07NA27344

Resource Type:: Patent

Resource Relation:: Patent File Date: 2014 Nov 28

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; 25 ENERGY STORAGE

Citation Formats


                    Post, Richard F. Non-contacting "snubber bearing" for passive magnetic bearing systems.  United States: N. p., 2017. 
        Web.

Copy to clipboard


                    Post, Richard F. Non-contacting "snubber bearing" for passive magnetic bearing systems.  United States.

Copy to clipboard


                    Post, Richard F. Tue .  
        "Non-contacting "snubber bearing" for passive magnetic bearing systems".  United States.  https://www.osti.gov/servlets/purl/1376063.

Copy to clipboard


                    
@article{osti_1376063,

  title        = {Non-contacting "snubber bearing" for passive magnetic bearing systems},

  author       = {Post, Richard F},

  abstractNote = {A new non-contacting magnetic "snubber" bearing is provided for application to rotating systems such as vehicular electromechanical battery systems subject to frequent accelerations. The design is such that in the equilibrium position the drag force of the snubber is very small (milliwatts). However in a typical case, if the rotor is displaced by as little as 2 millimeters a large restoring force is generated without any physical contact between the stationary and rotating parts of the snubber bearing.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {8}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Electromagnetic bearing control apparatus
patent, June 1989

Matsushita, Osami; Takagi, Michiyuki; Yoneyama, Mitsuho
US Patent Document 4,841,212
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4841212

Dynamically stable magnetic suspension/bearing system
patent, February 1996

Post, Richard
US Patent Document 5,495,221
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5495221

Magnetic levitation system for moving objects
patent, March 1998

Post, Richard F.
US Patent Document 5,722,326
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5722326

Self-adjusting magnetic bearing systems
patent, July 1998

Post, Richard F.
US Patent Document 5,783,885
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5783885

Combined passive bearing element/generator motor
patent, August 2000

Post, Richard
US Patent Document 6,111,332
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6111332

Motor/active magnetic bearing combination structure
patent, September 2000

Vuillemin (Muller), Ronald; Toshiyoshi, Hiroshi; Bleuler, Hannes
US Patent Document 6,114,788
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6114788

Magnetic bearings
patent, September 2000

Lembke, Torbjorn
US Patent Document 6,118,199
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6118199

Passive magnetic bearing for a horizontal shaft
patent, December 2003

Post, Richard F.
US Patent Document 6,657,344
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6657344

Inductrack magnet configuration
patent, December 2003

Post, Richard Freeman
US Patent Document 6,664,880
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6664880

Halbach array generator/motor having an automatically regulated output voltage and mechanical power output
patent, February 2005

Post, Richard F.
US Patent Document 6,858,962
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6858962

Halbach array generator/motor having mechanically regulated output voltage and mechanical power output
patent, June 2005

Post, Richard F.
US Patent Document 6,906,446
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6906446

Eddy-current-damped microelectromechanical switch
patent, October 2007

Christenson, Todd R.; Polosky, Marc A.
US Patent Document 7,289,009
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7289009

Motor and magnetic bearing assembly thereof
patent-application, August 2005

Chen, Lee-Long; Huang, Chien-Hsiung; Huang, Shih-Ming
US Patent Document 11/060759; 20050184609
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220050184609%22.PGNR.&OS=DN/20050184609&RS=DN/20050184609

Method and Apparatus for Controlling a Magnetic Bearing Device
patent-application, December 2007

Buhler, Philipp; Larsonneur, Rene
US Patent Document 11/658886; 20070296367
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220070296367%22.PGNR.&OS=DN/20070296367&RS=DN/20070296367

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

Fradella, Richard B.
US Patent Document 12/463275; 20100283340
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220100283340%22.PGNR.&OS=DN/20100283340&RS=DN/20100283340

Stabilization of Flywheels
patent-application, April 2012

Pinneo, John Michael; Garber, Jonathan Forrest
US Patent Document 13/280232; 20120098370
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220120098370%22.PGNR.&OS=DN/20120098370&RS=DN/20120098370

Stabilization of Rotating Machinery
patent-application, April 2012

Pinneo, John Michael; Garber, Jonathan Forrest
US Patent Document 13/280314; 20120098371
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220120098371%22.PGNR.&OS=DN/20120098371&RS=DN/20120098371

System And Method For Damping A Wind Vane
patent-application, June 2012

Smith, R. Paul; Bush, Henry; Heco, Emir
US Patent Document 13/332004; 20120156036
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220120156036%22.PGNR.&OS=DN/20120156036&RS=DN/20120156036

Inner Rotor-Type Permanent Magnet Motor
patent-application, April 2013

Yamashita, Fumitoshi; Yamada, Osamu; Ohya, Shiho
US Patent Document 13/648073; 20130088114
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220130088114%22.PGNR.&OS=DN/20130088114&RS=DN/20130088114

Similar Records in DOE Patents and OSTI.GOV collections:

Passive magnetic bearing systems stabilizer/bearing utilizing time-averaging of a periodic magnetic field

Patent Post, Richard F.

A high-stiffness stabilizer/bearings for passive magnetic bearing systems is provide where the key to its operation resides in the fact that when the frequency of variation of the repelling forces of the periodic magnet array is large compared to the reciprocal of the growth time of the unstable motion, the rotating system will feel only the time-averaged value of the force. When the time-averaged value of the force is radially repelling by the choice of the geometry of the periodic magnet array, the Earnshaw-related unstable hit motion that would occur at zero rotational speed is suppressed when the system ismore » rotating at operating speeds.« less
Full Text Available
Non-contact passive temperature measuring system and method of operation using micro-mechanical sensors

Patent Thundat, Thomas G [616 Plainfield Rd., Knoxville, TN 37923]; Oden, Patrick I [804-171 Olde Pioneer Trail, Knoxville, TN 37923]; Datskos, Panagiotis G [8444 Mecklenburg Ct., Knoxville, TN 37923]

A non-contact infrared thermometer measures target temperatures remotely without requiring the ratio of the target size to the target distance to the thermometer. A collection means collects and focusses target IR radiation on an IR detector. The detector measures thermal energy of the target over a spectrum using micromechanical sensors. A processor means calculates the collected thermal energy in at least two different spectral regions using a first algorithm in program form and further calculates the ratio of the thermal energy in the at least two different spectral regions to obtain the target temperature independent of the target size, distancemore »« less
Full Text Available
Electrostatic stabilizer for a passive magnetic bearing system

Patent Post, Richard F.

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.
Full Text Available
Passive magnetic bearing system

Patent Post, Richard F.

An axial stabilizer for the rotor of a magnetic bearing provides external control of stiffness through switching in external inductances. External control also allows the stabilizer to become a part of a passive/active magnetic bearing system that requires no external source of power and no position sensor. Stabilizers for displacements transverse to the axis of rotation are provided that require only a single cylindrical Halbach array in its operation, and thus are especially suited for use in high rotation speed applications, such as flywheel energy storage systems. The elimination of the need of an inner cylindrical array solves the difficultmore »« less
Full Text Available
Rotation-speed-independent stabilizer for passive magnetic bearing systems

Patent Post, Richard F.

By employing a combination of magnetic forces and those from electrostatic fields, a new stabilizer is able, unlike those employing dynamic effects, to function at any speed with no need for sensors or dynamically generated electrical currents. Embodiments are provided that stabilize the radial, axial and tilt instability. In addition to its use for stabilization, the radial stabilizer described herein also functions as an eccentricity detector.
Full Text Available

Similar Records

Title: Non-contacting "snubber bearing" for passive magnetic bearing systems

Abstract

Citation Formats

Electromagnetic bearing control apparatus patent, June 1989

Dynamically stable magnetic suspension/bearing system patent, February 1996

Magnetic levitation system for moving objects patent, March 1998

Self-adjusting magnetic bearing systems patent, July 1998

Combined passive bearing element/generator motor patent, August 2000

Motor/active magnetic bearing combination structure patent, September 2000

Magnetic bearings patent, September 2000

Passive magnetic bearing for a horizontal shaft patent, December 2003

Inductrack magnet configuration patent, December 2003

Halbach array generator/motor having an automatically regulated output voltage and mechanical power output patent, February 2005

Halbach array generator/motor having mechanically regulated output voltage and mechanical power output patent, June 2005

Eddy-current-damped microelectromechanical switch patent, October 2007

Motor and magnetic bearing assembly thereof patent-application, August 2005

Method and Apparatus for Controlling a Magnetic Bearing Device patent-application, December 2007

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

Stabilization of Flywheels patent-application, April 2012

Stabilization of Rotating Machinery patent-application, April 2012

System And Method For Damping A Wind Vane patent-application, June 2012

Inner Rotor-Type Permanent Magnet Motor patent-application, April 2013

Electromagnetic bearing control apparatus
patent, June 1989

Dynamically stable magnetic suspension/bearing system
patent, February 1996

Magnetic levitation system for moving objects
patent, March 1998

Self-adjusting magnetic bearing systems
patent, July 1998

Combined passive bearing element/generator motor
patent, August 2000

Motor/active magnetic bearing combination structure
patent, September 2000

Magnetic bearings
patent, September 2000

Passive magnetic bearing for a horizontal shaft
patent, December 2003

Inductrack magnet configuration
patent, December 2003

Halbach array generator/motor having an automatically regulated output voltage and mechanical power output
patent, February 2005

Halbach array generator/motor having mechanically regulated output voltage and mechanical power output
patent, June 2005

Eddy-current-damped microelectromechanical switch
patent, October 2007

Motor and magnetic bearing assembly thereof
patent-application, August 2005

Method and Apparatus for Controlling a Magnetic Bearing Device
patent-application, December 2007

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

Stabilization of Flywheels
patent-application, April 2012

Stabilization of Rotating Machinery
patent-application, April 2012

System And Method For Damping A Wind Vane
patent-application, June 2012

Inner Rotor-Type Permanent Magnet Motor
patent-application, April 2013