Magnet management in electric machines

Reddy, Patel Bhageerath; El-Refaie, Ayman Mohamed Fawzi; Huh, Kum Kang

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A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
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A24 - tobacco
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Title: Magnet management in electric machines

Abstract

A magnet management method of controlling a ferrite-type permanent magnet electrical machine includes receiving and/or estimating the temperature permanent magnets; determining if that temperature is below a predetermined temperature; and if so, then: selectively heating the magnets in order to prevent demagnetization and/or derating the machine. A similar method provides for controlling magnetization level by analyzing flux or magnetization level. Controllers that employ various methods are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

Inventors:: Reddy, Patel Bhageerath; El-Refaie, Ayman Mohamed Fawzi; Huh, Kum Kang

Issue Date:: 2017-03-21

Research Org.:: GE Global Research, Niskayuna, New York (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1347536

Patent Number(s):: 9602043

Application Number:: 14/473,216

Assignee:: General Electric Company

Patent Classifications (CPCs):: H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS

Show more

H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS
H02P2207/05 - Synchronous machines, e.g. with permanent magnets or DC excitation
H02P29/62 - for raising the temperature of the motor
H02P29/662 - {the rotor having permanent magnets

Show less

DOE Contract Number:: EE0005573

Resource Type:: Patent

Resource Relation:: Patent File Date: 2014 Aug 29

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS

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                    Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, and Huh, Kum Kang. Magnet management in electric machines.  United States: N. p., 2017. 
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                    Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, & Huh, Kum Kang. Magnet management in electric machines.  United States.

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                    Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, and Huh, Kum Kang. Tue .  
        "Magnet management in electric machines".  United States.  https://www.osti.gov/servlets/purl/1347536.

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@article{osti_1347536,

  title        = {Magnet management in electric machines},

  author       = {Reddy, Patel Bhageerath and El-Refaie, Ayman Mohamed Fawzi and Huh, Kum Kang},

  abstractNote = {A magnet management method of controlling a ferrite-type permanent magnet electrical machine includes receiving and/or estimating the temperature permanent magnets; determining if that temperature is below a predetermined temperature; and if so, then: selectively heating the magnets in order to prevent demagnetization and/or derating the machine. A similar method provides for controlling magnetization level by analyzing flux or magnetization level. Controllers that employ various methods are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {3}

}

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Works referenced in this record:

In-line motor heater circuit
patent, February 1973

Dikinis, Daumantas V.; Yuen, Moon H.
US Patent Document 3,717,804
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3717804

Direct axis aiding permanent magnets for a laminated synchronous motor rotor
patent, February 1979

Steen, Charles R.
US Patent Document 4,139,790
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4139790

Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives
patent, March 1987

Gritter, David J.; O'Neil, Walter K.; Turner, David C.
US Patent Document 4,651,066
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4651066

Brushless D.C. dynamoelectric machine with decreased magnitude of pulsations of air gap flux
patent, December 1987

Whiteley, Eric
US Patent Document 4,710,667
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4710667

Method and device for forming images by nuclear magnetic resonance
patent, February 1988

Kaplan, Daniel; Roux, Georges
US Patent Document 4,727,326
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4727326

Method and device for measuring the temperature of a brushless d-c motor
patent, November 1989

Meyer, Helmut; Seeberger, Jurgen
US Patent Document 4,879,497
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4879497

Magnetic property characterization system employing a single sensing coil arrangement to measure AC susceptibility and DC moment of a sample
patent, May 1994

Krause, John K.; Wang, Victor; Dodrill, Bradley C.
US Patent Document 5,311,125
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5311125

Magnetic property characterization system employing a single sensing coil arrangement to measure both AC susceptibility and DC magnetization
patent, April 1996

Krause, John K.; Wang, Victor; Dodrill, Bradley C.
US Patent Document 5,506,500
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5506500

Magnet assembly for MRI apparatus
patent, July 1997

Maki, Kazutoshi; Inoue, Yuji; Nakamura, Naoki
US Patent Document 5,652,517
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5652517

Hybrid alternator
patent, May 1998

Syverson, Charles D.; Francis, Willard P.
US Patent Document 5,747,909
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5747909

Generating system including generator having permanent magnet
patent, March 2000

Maehara, Fuyuki; Takase, Yasuhiro; Kanazawa, Wakako
US Patent Document 6,043,632
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6043632

Permanent magnet motor
patent, March 2002

Miura, Tetsuya; Hirako, Masaru; Nagamatsu, Shigetaka
US Patent Document 6,359,359
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6359359

Electric motor having rotor-embedded sensor
patent, January 2003

Nondahl, Thomas A.; DelVecchio, Perry A.
US Patent Document 6,504,275
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6504275

Rare earth-based sintered magnet and permanent magnet synchronous motor therewith
patent, August 2003

Ohashi, Ken
US Patent Document 6,606,019
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6606019

Motor having a rotor with interior split-permanent-magnet
patent, May 2004

Nishiyama, Noriyoshi; Nakamura, Tomokazu; Ikkai, Yasufumi
US Patent Document 6,741,002
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6741002

Recondensing superconducting magnet thermal management system and method
patent, December 2004

Zaput, James Joseph
US Patent Document 6,828,889
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6828889

Method and apparatus for monitoring superconducting magnet data
patent, January 2005

Knight, Larry; Chan, Peter
US Patent Document 6,838,964
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6838964

Motor temperature sensor system and method to determine motor performance
patent, June 2005

Carson, David M.; Hall, Richard W.
US Patent Document 6,903,525
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6903525

Method and device for determining the rotor temperature in a permanent magnet-excited synchronous machine
patent, August 2006

Rechberger, Klaus
US Patent Document 7,099,793
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7099793

Eddy current heating for reducing transient thermal stresses in a rotor of a gas turbine engine
patent, August 2007

Dooley, Kevin Allan; Abrari, Farid
US Patent Document 7,258,526
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7258526

Magnetic resonance imaging apparatus provided with means for preventing closed loop circuit formation across and between inside and outside of cryostat
patent, December 2007

Tsuda, Munetaka; Takeuchi, Hiroyuki; Sakamoto, Isao
US Patent Document 7,304,478
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7304478

Permanent magnet type rotating electrical machine
patent, September 2008

Hino, Noriaki; Matsunobu, Yutaka; Tajima, Fumio
US Patent Document 7,425,786
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7425786

Motor control method and motor control system
patent, February 2009

Amagasa, Toshiyuki
US Patent Document 7,486,038
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7486038

High-efficiency parallel-pole molded-magnetic flux channels transverse wound motor-dynamo
patent, August 2009

Rittenhouse, Norman
US Patent Document 7,579,742
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7579742

Motor control method and motor control apparatus
patent, September 2010

Atarashi, Hirofumi; Isegawa, Hiroyuki
US Patent Document 7,804,261
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7804261

Permanent magnet magnetizing apparatus and permanent magnet magnetizing method
patent, October 2010

Komura, Haruhiro; Kitaoka, Mikio; Ohashi, Ikuo
US Patent Document 7,821,365
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7821365

Electric motor stator winding temperature estimation
patent, November 2010

Patel, Nitinkumar R.; Son, Yo Chan; Hiti, Silva
US Patent Document 7,839,108
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7839108

Methods and apparatus for preventing demagnetization in interior permanent magnet machines
patent, November 2010

Blissenbach, Rolf; Bird, Jonathan
US Patent Document 7,843,100
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7843100

System, method and apparatus for controlling drift of a main magnetic field in an MRI system
patent, June 2011

Seeber, Derek Allan; Duby, Tomas
US Patent Document 7,962,019
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7962019

Motor control device, control method, and control program
patent, September 2011

Miura, Tetsuya
US Patent Document 8,013,565
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8013565

Electric motor
patent, September 2012

Heitzler, Jean-Claude; Muller, Christian
US Patent Document 8,258,658
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8258658

Superconducting quick switch
patent, February 2013

Diederichs, Jost; Amann, Andreas; Simmonds, Michael B.
US Patent Document 8,384,504
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8384504

Electric motor stator winding temperature estimation systems and methods
patent, April 2013

Yeh, Chia-Chou; Schulz, Steven E.
US Patent Document 8,421,391
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8421391

Method for presenting menu buttons
patent, May 2014

Hoerentrup, Jobst; Ostermann, Ralf; Schiller, Harald
US Patent Document 8,732,612
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8732612

Permanent-magnet-excited electric motor with heating device, and operating method
patent, October 2015

Potoradi, Detlef; Vollmer, Rolf; Van Riesen, Dirk
US Patent Document 9,160,206
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9160206

Air conditioning systems and methods for operating the same
patent-application, October 2002

Egawa, Satoru; Suitou, Ken; Odachi, Yasuharu
US Patent Application 10/091157; 20020157408
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20020157408

Method and device for determining the rotor temperature in a permanent magnet-excited synchronous machine
patent-application, December 2004

Rechberger, Klaus
US Patent Application 10/479075; 20040257011
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20040257011

Motor temperature sensor system and method to determine motor performance
patent-application, February 2005

Carson, David M.; Hall, Richard
US Patent Application 10/633533; 20050029975
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20050029975

Permanent magnet assembly
patent-application, March 2005

Chell, Jeremy
US Patent Application 10/924711; 20050046533
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20050046533

Superconducting magnet device and magnetic resonance imaging system employing it
patent-application, November 2005

Tsuda, Munetaka; Takeuchi, Hiroyuki; Sakamoto, Isao
US Patent Application 10/528759; 20050248350
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20050248350

Controller for electric power steering apparatus
patent-application, November 2006

Nagase, Shigeki; Yukumatsu, Norimitsu
US Patent Application 11/440923; 20060266575
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20060266575

Superconducting quick switch
patent-application, July 2007

Diederichs, Jost; Amann, Andreas; Simmonds, Michael B.
US Patent Application 11/326903; 20070159280
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20070159280

Radial anisotropic cylindrical sintered magnet and permanent magnet motor
patent-application, July 2007

Sato, Koji; Minowa, Takehisa
US Patent Application 10/589235; 20070170801
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20070170801

Motor Control Method and Motor Control System
patent-application, May 2008

Amagasa, Toshiyuki
US Patent Application 11/667104; 20080100244
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080100244

Motor control method and motor control apparatus
patent-application, June 2008

Atarashi, Hirofumi; Isegawa, Hiroyuki
US Patent Application 11/998429; 20080129237
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080129237

Permanent Magnet Magnetizing Apparatus And Permanent Magnet Magnetizing Method
patent-application, July 2008

Komura, Haruhiro; Kitaoka, Mikio; Ohashi, Ikuo
US Patent Application 11/886081; 20080169892
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080169892

Segmented permanent magnet rotor for high speed synchronous machines
patent-application, October 2008

Saban, Daniel M.; Vanek, Laurence D.
US Patent Application 11/728840; 20080238234
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080238234

Multi-Layer Magnet Arrangement In A Permanent Magnet Machine For A Motorized Vehicle
patent-application, December 2008

Rahman, Khwaja M.; Kaiser, Edward L.; Laba, Matthew D.
US Patent Application 11/758923; 20080303368
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080303368

Rotary electric machine control device, rotary electric machine control method, and rotary electric machine control program
patent-application, July 2009

Hayashi, Kazuhito; Okamura, Masaki
US Patent Application 12/308956; 20090179602
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20090179602

Electric Motor Stator Winding Temperature Estimation
patent-application, July 2009

Patel, Nitinkumar R.; Son, Yo CHan; Hiti, Silva
US Patent Application 12/019395; 20090189561
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20090189561

Motor Control Device, Control Method, and Control Program
patent-application, November 2009

Miura, Tetsuya
US Patent Application 12/309526; 20090284202
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20090284202

Superconducting Quick Switch
patent-application, January 2010

Diederichs, Jost; Amann, Andreas; Simmonds, Michael B.
US Patent Application 12/168733; 20100001821
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20100001821

Gear Trains Employing Magnetic Coupling
patent-application, July 2010

Post, Richard Freeman
US Patent Application 12/687585; 20100176674
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20100176674

Magnetic Resonance Imaging System And Method For Stabilizing The Temperature Of The Main Magnet Therein
patent-application, July 2010

Cao, Kai; Yao, Jiabin
US Patent Application 12/692107; 20100188083
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20100188083

Electric Motor Stator Winding Temperature Estimation
patent-application, March 2011

Yeh, Chia-Chou; Patel, Nitinkumar R.; Son, Yo Chan
US Patent Application 12/568002; 20110050141
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110050141

Overcurrent Detection Circuit, Inverter, Compressor, and Air-Conditioning Machine, and Adjusting Method for Adjusting Overcurrent Detection Circuit
patent-application, June 2011

Sakanobe, Kazunori; Arisawa, Koichi; Okawa, Futoshi
US Patent Application 13/058691; 20110157752
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110157752

Electrical Machine Safety System
patent-application, September 2011

Cullen, John J. A.; Jewell, Geraint W.
US Patent Application 13/073344; 20110234180
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110234180

Permanent Magnet Motor
patent-application, October 2011

Fujioka, Takushi; Tanabe, Yoichi; Hamano, Takuya
US Patent Application 13/071297; 20110241467
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110241467

Electric Motor Stator Winding Temperature Estimation Systems and Methods
patent-application, November 2011

Yeh, Chia-Chou; Schulz, Steven E.
US Patent Application 12/778733; 20110279074
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110279074

Electric Motor and Electric Vehicle Having The Same
patent-application, November 2012

Choi, Jinha; Hong, Gilwon; Lim, Junyoung
US Patent Application 13/233416; 20120299409
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20120299409

Synchronous Motor
patent, August 2013

Kusase, Shin; Kondou, Keiji
US Patent Application 13/741697; 20130207498
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20130207498

Synchronous Machine Control Apparatus
patent-application, September 2013

Kobayashi, Takahiko; Anzai, Kiyoharu; Wada, Noriyuki
US Patent Document 13/667673; 20130249448
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20130249448

Control Apparatus for Rotary Electric Machine, Rotary Electric Machine Drive System, And Control Method For Rotary Electric Machine
patent-application, February 2014

Hirai, Yu; Miyata, Kzuhide
US Patent Application 13/960374; 20140054986
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140054986

Magnetic De-Icing
patent-application, April 2014

Ribarov, Lubomir A.; Gieras, Jacek F.
US Patent Application 13/646456; 20140096503
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140096503

Electric Oil Pump System And Control Method Thereof
patent-application, March 2013

Kang, Seung Jae; Jeong, Sang Hyun; Kim, Jong Hyun
US Patent Application 13/845866; 20140187382
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140187382

Method And Device For Temperature-Dependent Control Of An Electric Motor
patent-application, November 2014

Wesenberg, Andre; Reuter, Mirko
US Patent Application 14/365429; 20140350762
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140350762

System And Method For Heating Ferrite Magnet Motors For Low Temperatures
patent-application, April 2015

Reddy, Patel Bhageerath; EL-Refaie, Ayman Mohamed Fawzi; Huh, Kum-Kang
US Patent Application 14/063547; 20150115757
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20150115757

Electric Motor, Compressor, And Method For Controlling Electric Motor Or Compressor
patent-application, July 2015

Liu, Wanzhen; Yao, Li; Lin, Yan
US Patent Application 14/580979; 20150188480
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20150188480

The Ferrite Permanent Magnet AC Motor---A Technical and Economical Assessment
journal, May 1985

Richter, Eike; Miller, Timothy J. E.; Neumann, Thomas W.
IEEE Transactions on Industry Applications, Vol. IA-21, Issue 3, p. 644-650
https://doi.org/10.1109/TIA.1985.349721

Rotor structure for reducing demagnetization of magnet in a PMASynRM with ferrite permanent magnet and its characteristics
conference, September 2011

Sanada, Masayuki; Inoue, Yukinori; Morimoto, Shigeo
2011 IEEE Energy Conversion Congress and Exposition
https://doi.org/10.1109/ECCE.2011.6064340

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A stator lamination for an electric machine has a circular lamination with an annular bore therethrough; winding slots therethrough; and, slot closures disposed adjacent to the winding slots. The stator lamination is formed of a dual magnetic phase material, such that the magnetic property of the lamination can have a first state and a magnetic property in a second state, wherein the second state is different than the first state. The slot closures regions are treated so as to transition to the second state. A method of manufacturing an electric machine component is also disclosed.
Full Text Available
Method for providing slip energy control in permanent magnet electrical machines

Patent Hsu, John S.

An electric machine (40) has a stator (43), a permanent magnet rotor (38) with permanent magnets (39) and a magnetic coupling uncluttered rotor (46) for inducing a slip energy current in secondary coils (47). A dc flux can be produced in the uncluttered rotor when the secondary coils are fed with dc currents. The magnetic coupling uncluttered rotor (46) has magnetic brushes (A, B, C, D) which couple flux in through the rotor (46) to the secondary coils (47c, 47d) without inducing a current in the rotor (46) and without coupling a stator rotational energy component to the secondary coilsmore » « less
Full Text Available
Automated recovery of rare earth permanent magnets from electric machines

Patent McIntyre, Timothy J.; Harter, Jonathan J.

A method for the automated recovery of rare earth permanent magnets from electric machines are provided. The method includes identifying electric machines in a mixed product stream for performing a unique robotic disassembly routine. Electric machines that are not identified are diverted to a robot training station, during which time the system and the method include implementing a suitable disassembly routine. A conveyor delivers the remaining electric machines to a rotary platform having multiple stations for the simultaneous disassembly of multiple electric machines. Permanent magnets are removed from the electric machines and are then sorted for recycling operations.
Full Text Available
Dual magnetic phase material rings for AC electric machines

Patent Reddy, Patel Bhageerath; Zou, Min; El-Refaie, Ayman Mohamed Fawzi; ...

An AC electric machine that includes a dual magnetic phase material ring is disclosed. The AC electric machine includes a stator assembly and a rotor assembly positioned within the stator assembly and configured to rotate relative thereto, the rotor assembly comprising a rotor core including a stack of rotor laminations that collectively form the rotor core, the rotor core including a plurality of rotor poles separated by gaps therebetween. The AC electric machine also includes a dual magnetic phase material ring positioned about the stack of rotor laminations, the dual magnetic phase material ring comprising a first ring portion comprisingmore » « less
Full Text Available
Energy management system for a rotary machine and method therefor

Patent Bowman, Michael John; Sinha, Gautam (NMN); Sheldon, Karl Edward

In energy management system is provided for a power generating device having a working fluid intake in which the energy management system comprises an electrical dissipation device coupled to the power generating device and a dissipation device cooling system configured to direct a portion of a working fluid to the electrical dissipation device so as to provide thermal control to the electrical dissipation device.
Full Text Available

Similar Records

Title: Magnet management in electric machines

Abstract

Citation Formats

In-line motor heater circuit patent, February 1973

Direct axis aiding permanent magnets for a laminated synchronous motor rotor patent, February 1979

Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives patent, March 1987

Brushless D.C. dynamoelectric machine with decreased magnitude of pulsations of air gap flux patent, December 1987

Method and device for forming images by nuclear magnetic resonance patent, February 1988

Method and device for measuring the temperature of a brushless d-c motor patent, November 1989

Magnetic property characterization system employing a single sensing coil arrangement to measure AC susceptibility and DC moment of a sample patent, May 1994

Magnetic property characterization system employing a single sensing coil arrangement to measure both AC susceptibility and DC magnetization patent, April 1996

Magnet assembly for MRI apparatus patent, July 1997

Hybrid alternator patent, May 1998

Generating system including generator having permanent magnet patent, March 2000

Permanent magnet motor patent, March 2002

Electric motor having rotor-embedded sensor patent, January 2003

Rare earth-based sintered magnet and permanent magnet synchronous motor therewith patent, August 2003

Motor having a rotor with interior split-permanent-magnet patent, May 2004

Recondensing superconducting magnet thermal management system and method patent, December 2004

Method and apparatus for monitoring superconducting magnet data patent, January 2005

Motor temperature sensor system and method to determine motor performance patent, June 2005

Method and device for determining the rotor temperature in a permanent magnet-excited synchronous machine patent, August 2006

Eddy current heating for reducing transient thermal stresses in a rotor of a gas turbine engine patent, August 2007

Magnetic resonance imaging apparatus provided with means for preventing closed loop circuit formation across and between inside and outside of cryostat patent, December 2007

Permanent magnet type rotating electrical machine patent, September 2008

Motor control method and motor control system patent, February 2009

High-efficiency parallel-pole molded-magnetic flux channels transverse wound motor-dynamo patent, August 2009

Motor control method and motor control apparatus patent, September 2010

Permanent magnet magnetizing apparatus and permanent magnet magnetizing method patent, October 2010

Electric motor stator winding temperature estimation patent, November 2010

Methods and apparatus for preventing demagnetization in interior permanent magnet machines patent, November 2010

System, method and apparatus for controlling drift of a main magnetic field in an MRI system patent, June 2011

Motor control device, control method, and control program patent, September 2011

Electric motor patent, September 2012

Superconducting quick switch patent, February 2013

Electric motor stator winding temperature estimation systems and methods patent, April 2013

Method for presenting menu buttons patent, May 2014

Permanent-magnet-excited electric motor with heating device, and operating method patent, October 2015

Air conditioning systems and methods for operating the same patent-application, October 2002

Method and device for determining the rotor temperature in a permanent magnet-excited synchronous machine patent-application, December 2004

Motor temperature sensor system and method to determine motor performance patent-application, February 2005

Permanent magnet assembly patent-application, March 2005

Superconducting magnet device and magnetic resonance imaging system employing it patent-application, November 2005

Controller for electric power steering apparatus patent-application, November 2006

Superconducting quick switch patent-application, July 2007

Radial anisotropic cylindrical sintered magnet and permanent magnet motor patent-application, July 2007

Motor Control Method and Motor Control System patent-application, May 2008

Motor control method and motor control apparatus patent-application, June 2008

Permanent Magnet Magnetizing Apparatus And Permanent Magnet Magnetizing Method patent-application, July 2008

Segmented permanent magnet rotor for high speed synchronous machines patent-application, October 2008

Multi-Layer Magnet Arrangement In A Permanent Magnet Machine For A Motorized Vehicle patent-application, December 2008

Rotary electric machine control device, rotary electric machine control method, and rotary electric machine control program patent-application, July 2009

Electric Motor Stator Winding Temperature Estimation patent-application, July 2009

Motor Control Device, Control Method, and Control Program patent-application, November 2009

Superconducting Quick Switch patent-application, January 2010

Gear Trains Employing Magnetic Coupling patent-application, July 2010

Magnetic Resonance Imaging System And Method For Stabilizing The Temperature Of The Main Magnet Therein patent-application, July 2010

Electric Motor Stator Winding Temperature Estimation patent-application, March 2011

Overcurrent Detection Circuit, Inverter, Compressor, and Air-Conditioning Machine, and Adjusting Method for Adjusting Overcurrent Detection Circuit patent-application, June 2011

Electrical Machine Safety System patent-application, September 2011

Permanent Magnet Motor patent-application, October 2011

Electric Motor Stator Winding Temperature Estimation Systems and Methods patent-application, November 2011

Electric Motor and Electric Vehicle Having The Same patent-application, November 2012

Synchronous Motor patent, August 2013

Synchronous Machine Control Apparatus patent-application, September 2013

Control Apparatus for Rotary Electric Machine, Rotary Electric Machine Drive System, And Control Method For Rotary Electric Machine patent-application, February 2014

Magnetic De-Icing patent-application, April 2014

Electric Oil Pump System And Control Method Thereof patent-application, March 2013

Method And Device For Temperature-Dependent Control Of An Electric Motor patent-application, November 2014

System And Method For Heating Ferrite Magnet Motors For Low Temperatures patent-application, April 2015

Electric Motor, Compressor, And Method For Controlling Electric Motor Or Compressor patent-application, July 2015

The Ferrite Permanent Magnet AC Motor---A Technical and Economical Assessment journal, May 1985

Rotor structure for reducing demagnetization of magnet in a PMASynRM with ferrite permanent magnet and its characteristics conference, September 2011

In-line motor heater circuit
patent, February 1973

Direct axis aiding permanent magnets for a laminated synchronous motor rotor
patent, February 1979

Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives
patent, March 1987

Brushless D.C. dynamoelectric machine with decreased magnitude of pulsations of air gap flux
patent, December 1987

Method and device for forming images by nuclear magnetic resonance
patent, February 1988

Method and device for measuring the temperature of a brushless d-c motor
patent, November 1989

Magnetic property characterization system employing a single sensing coil arrangement to measure AC susceptibility and DC moment of a sample
patent, May 1994

Magnetic property characterization system employing a single sensing coil arrangement to measure both AC susceptibility and DC magnetization
patent, April 1996

Magnet assembly for MRI apparatus
patent, July 1997

Hybrid alternator
patent, May 1998

Generating system including generator having permanent magnet
patent, March 2000

Permanent magnet motor
patent, March 2002

Electric motor having rotor-embedded sensor
patent, January 2003

Rare earth-based sintered magnet and permanent magnet synchronous motor therewith
patent, August 2003

Motor having a rotor with interior split-permanent-magnet
patent, May 2004

Recondensing superconducting magnet thermal management system and method
patent, December 2004

Method and apparatus for monitoring superconducting magnet data
patent, January 2005

Motor temperature sensor system and method to determine motor performance
patent, June 2005

Method and device for determining the rotor temperature in a permanent magnet-excited synchronous machine
patent, August 2006

Eddy current heating for reducing transient thermal stresses in a rotor of a gas turbine engine
patent, August 2007

Magnetic resonance imaging apparatus provided with means for preventing closed loop circuit formation across and between inside and outside of cryostat
patent, December 2007

Permanent magnet type rotating electrical machine
patent, September 2008

Motor control method and motor control system
patent, February 2009

High-efficiency parallel-pole molded-magnetic flux channels transverse wound motor-dynamo
patent, August 2009

Motor control method and motor control apparatus
patent, September 2010

Permanent magnet magnetizing apparatus and permanent magnet magnetizing method
patent, October 2010

Electric motor stator winding temperature estimation
patent, November 2010

Methods and apparatus for preventing demagnetization in interior permanent magnet machines
patent, November 2010

System, method and apparatus for controlling drift of a main magnetic field in an MRI system
patent, June 2011

Motor control device, control method, and control program
patent, September 2011

Electric motor
patent, September 2012

Superconducting quick switch
patent, February 2013

Electric motor stator winding temperature estimation systems and methods
patent, April 2013

Method for presenting menu buttons
patent, May 2014

Permanent-magnet-excited electric motor with heating device, and operating method
patent, October 2015

Air conditioning systems and methods for operating the same
patent-application, October 2002

Method and device for determining the rotor temperature in a permanent magnet-excited synchronous machine
patent-application, December 2004

Motor temperature sensor system and method to determine motor performance
patent-application, February 2005

Permanent magnet assembly
patent-application, March 2005

Superconducting magnet device and magnetic resonance imaging system employing it
patent-application, November 2005

Controller for electric power steering apparatus
patent-application, November 2006

Superconducting quick switch
patent-application, July 2007

Radial anisotropic cylindrical sintered magnet and permanent magnet motor
patent-application, July 2007

Motor Control Method and Motor Control System
patent-application, May 2008

Motor control method and motor control apparatus
patent-application, June 2008

Permanent Magnet Magnetizing Apparatus And Permanent Magnet Magnetizing Method
patent-application, July 2008

Segmented permanent magnet rotor for high speed synchronous machines
patent-application, October 2008

Multi-Layer Magnet Arrangement In A Permanent Magnet Machine For A Motorized Vehicle
patent-application, December 2008

Rotary electric machine control device, rotary electric machine control method, and rotary electric machine control program
patent-application, July 2009

Electric Motor Stator Winding Temperature Estimation
patent-application, July 2009

Motor Control Device, Control Method, and Control Program
patent-application, November 2009

Superconducting Quick Switch
patent-application, January 2010

Gear Trains Employing Magnetic Coupling
patent-application, July 2010

Magnetic Resonance Imaging System And Method For Stabilizing The Temperature Of The Main Magnet Therein
patent-application, July 2010

Electric Motor Stator Winding Temperature Estimation
patent-application, March 2011

Overcurrent Detection Circuit, Inverter, Compressor, and Air-Conditioning Machine, and Adjusting Method for Adjusting Overcurrent Detection Circuit
patent-application, June 2011

Electrical Machine Safety System
patent-application, September 2011

Permanent Magnet Motor
patent-application, October 2011

Electric Motor Stator Winding Temperature Estimation Systems and Methods
patent-application, November 2011

Electric Motor and Electric Vehicle Having The Same
patent-application, November 2012

Synchronous Motor
patent, August 2013

Synchronous Machine Control Apparatus
patent-application, September 2013

Control Apparatus for Rotary Electric Machine, Rotary Electric Machine Drive System, And Control Method For Rotary Electric Machine
patent-application, February 2014

Magnetic De-Icing
patent-application, April 2014

Electric Oil Pump System And Control Method Thereof
patent-application, March 2013

Method And Device For Temperature-Dependent Control Of An Electric Motor
patent-application, November 2014

System And Method For Heating Ferrite Magnet Motors For Low Temperatures
patent-application, April 2015

Electric Motor, Compressor, And Method For Controlling Electric Motor Or Compressor
patent-application, July 2015

The Ferrite Permanent Magnet AC Motor---A Technical and Economical Assessment
journal, May 1985

Rotor structure for reducing demagnetization of magnet in a PMASynRM with ferrite permanent magnet and its characteristics
conference, September 2011