Rotor for a line start permanent magnet machine

Melfi, Mike; Schiferl, Rich; Umans, Stephen

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A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
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B - performing operations
B01 - physical or chemical processes or apparatus in general
B02 - crushing, pulverising, or disintegrating
B03 - separation of solid materials using liquids or using pneumatic tables or jigs
B04 - centrifugal apparatus or machines for carrying-out physical or chemical processes
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Title: Rotor for a line start permanent magnet machine

Abstract

A rotor comprises laminations with a plurality of rotor bar slots with an asymmetric arrangement about the rotor. The laminations also have magnet slots equiangularly spaced about the rotor. The magnet slots extend near to the rotor outer diameter and have permanent magnets disposed in the magnet slots creating magnetic poles. The magnet slots may be formed longer than the permanent magnets disposed in the magnets slots and define one or more magnet slot apertures. The permanent magnets define a number of poles and a pole pitch. The rotor bar slots are spaced from adjacent magnet slots by a distance that is at least 4% of the pole pitch. Conductive material is disposed in the rotor bar slots, and in some embodiments, may be disposed in the magnet slot apertures.

Inventors:: Melfi, Mike; Schiferl, Rich; Umans, Stephen

Issue Date:: 2017-07-11

Research Org.:: BALDOR ELECTRIC COMPANY, Forth Smith, AR (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1369046

Patent Number(s):: 9705388

Application Number:: 13/329,814

Assignee:: BALDOR ELECTRIC COMPANY

Patent Classifications (CPCs):: H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES

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H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
H02K1/223 - {Rotor cores with windings and permanent magnets
H02K1/276 - {Magnets embedded in the magnetic core}
H02K21/46 - Motors having additional short-circuited winding for starting as an asynchronous motor
H02K2213/03 - Machines characterised by numerical values, ranges, mathematical expressions or similar information

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DOE Contract Number:: FG36-08GO180132

Resource Type:: Patent

Resource Relation:: Patent File Date: 2011 Dec 19

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Melfi, Mike, Schiferl, Rich, and Umans, Stephen. Rotor for a line start permanent magnet machine.  United States: N. p., 2017. 
        Web.

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                    Melfi, Mike, Schiferl, Rich, & Umans, Stephen. Rotor for a line start permanent magnet machine.  United States.

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                    Melfi, Mike, Schiferl, Rich, and Umans, Stephen. Tue .  
        "Rotor for a line start permanent magnet machine".  United States.  https://www.osti.gov/servlets/purl/1369046.

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@article{osti_1369046,

  title        = {Rotor for a line start permanent magnet machine},

  author       = {Melfi, Mike and Schiferl, Rich and Umans, Stephen},

  abstractNote = {A rotor comprises laminations with a plurality of rotor bar slots with an asymmetric arrangement about the rotor. The laminations also have magnet slots equiangularly spaced about the rotor. The magnet slots extend near to the rotor outer diameter and have permanent magnets disposed in the magnet slots creating magnetic poles. The magnet slots may be formed longer than the permanent magnets disposed in the magnets slots and define one or more magnet slot apertures. The permanent magnets define a number of poles and a pole pitch. The rotor bar slots are spaced from adjacent magnet slots by a distance that is at least 4% of the pole pitch. Conductive material is disposed in the rotor bar slots, and in some embodiments, may be disposed in the magnet slot apertures.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {7}

}

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Works referenced in this record:

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

Permanent magnet rotor
patent, September 1983

Miyashita, Kunio; Yamashita, Seizi; Watanabe, Hiroshi
US Patent Document 4,403,161
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High efficiency, low cost permanent magnet AC machine
patent, October 1984

Honsinger, Vernon B.
US Patent Document 4,476,408
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Permanent magnet laminated rotor with conductor bars
patent, February 1986

Kapadia, Shailesh C.
US Patent Document 4,568,846
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Method of fabricating composite rotor laminations for use in reluctance, homopolar and permanent magnet machines
patent, April 1990

Kliman, Gerald Burt
US Patent Document 4,918,831
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Rotor lamination for an AC permanent magnet synchronous motor
patent, March 1992

Mikulic, Kreso
US Patent Document 5,097,166
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Hybrid-energized electric machine
patent, September 1997

Brandes, Jurgen; Schuller, Uwe
US Patent Document 5,672,926
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5672926

Reluctance type rotating machine with permanent magnets
patent, April 2003

Sakai, Kazuto; Arata, Masanori; Takabatake, Mikio
US Patent Document 6,552,462
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6552462

Permanent magnet synchronous motor
patent, April 2004

Sasaki, Kenji; Tamura, Teruo; Yoshida, Michihiro
US Patent Document 6,727,627
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6727627

Air conditioner having permanent magnet rotating electric machine
patent, July 2005

Koharagi, Haruo; Senoh, Masaharu; Noma, Keiji
US Patent Document 6,917,133
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6917133

Rotor for reluctance type rotating machine
patent, January 2007

Araki, Takashi; Matsubara, Masakatsu; Mochizuki, Motoyasu
US Patent Document 7,170,209
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7170209

Rotor for an electric motor
patent, February 2007

Weihrauch, Niels Christian
US Patent Document 7,183,685
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7183685

Permanent magnet synchronous motor
patent, February 2007

Sasaki, Kenji; Tamura, Teruo; Yoshida, Michihiro
US Patent Document 7,183,686
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7183686

Rotor for an electric motor
patent, July 2007

Weihrauch, Niels Christian
US Patent Document 7,247,965
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7247965

Permanent magnet synchronous motor
patent, May 2008

Sasaki, Kenji; Tamura, Teruo; Yoshida, Michihiro
US Patent Document 7,372,183
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7372183

Cogging reduction in permanent magnet machines
patent, June 2008

Melfi, Michael J.
US Patent Document 7,385,328
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7385328

Interior permanent magnet motor and rotor
patent, April 2011

Ionel, Dan M.; Dellinger, Stephen J.; Lesak, Alan E.
US Patent Document 7,923,881
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7923881

Interior permanent magnet motor including rotor with flux barriers
patent, April 2011

Ionel, Dan M.
US Patent Document 7,932,658
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7932658

Rotor for an electric motor
patent-application, July 2006

Weihrauch, Niels Christian
US Patent Application 10/539500; 20060145557
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20060145557

Rotor with a cover plate for securing a magnet in the rotor
patent-application, July 2006

Weihrauch, Niels Christian; Andersen, Peter Scavenius
US Patent Application 11/312957; 20060158056
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Distributed Coil Stator for External Rotor Three Phase Electric Motors
patent, February 2008

Mehta, Vinay
US Patent Document 11/829999; 20080030096
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Interior Permanent Magnet Motor Including Rotor With Flux Barriers
patent-application, September 2008

Ionel, Dan M.
US Patent Application 12/050087; 20080224558
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Self-Starting Type Permanent Magnet Synchronous Motor and a Compressor Using the Same
patent-application, June 2009

Kikuchi, Satoshi; Mikami, Hiroyuki; Takahashi, Akeshi
US Patent Application 12/336647; 20090160285
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Rotational Angle Detection Device And Method For Permanent Magnet Dynamo-Electric Machine And Electric Power Steering Device
patent-application, July 2009

Nakano, Masatsugu; Satake, Akira; Shinkawa, Kanji
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Permanent-Magnet (PM) Rotors and Systems
patent, June 2010

Feng, Xueqing; Liu, Lijun
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URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20100133941

Self-Starting Permanent Magnet Synchronous Motor And Compressor And Refrigeration Cycle Using The Same
patent-application, February 2011

Kikuchi, Satoshi; MIkami, Hiroyuki; Yoshikawa, Tomio
US Patent Application 12/851017; 20110030419
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110030419

Method And Apparatus For Compensating A Line Synchronous Generator
patent, June 2011

Nickoladze, Leo G.; Marks, Hildegard K.
US Patent Application 12/970432; 20110140560
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110140560

Permanent Magnet Excited Synchronous Machine With Embedded Magnets
patent-application, July 2012

Mathoy, Arno; Mathoy, Verena; Mathoy, Anna
US Patent Application 13/390632; 20120175989
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20120175989

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Similar Records

Title: Rotor for a line start permanent magnet machine

Abstract

Citation Formats

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

Permanent magnet rotor patent, September 1983

High efficiency, low cost permanent magnet AC machine patent, October 1984

Permanent magnet laminated rotor with conductor bars patent, February 1986

Method of fabricating composite rotor laminations for use in reluctance, homopolar and permanent magnet machines patent, April 1990

Rotor lamination for an AC permanent magnet synchronous motor patent, March 1992

Hybrid-energized electric machine patent, September 1997

Reluctance type rotating machine with permanent magnets patent, April 2003

Permanent magnet synchronous motor patent, April 2004

Air conditioner having permanent magnet rotating electric machine patent, July 2005

Rotor for reluctance type rotating machine patent, January 2007

Rotor for an electric motor patent, February 2007

Permanent magnet synchronous motor patent, February 2007

Rotor for an electric motor patent, July 2007

Permanent magnet synchronous motor patent, May 2008

Cogging reduction in permanent magnet machines patent, June 2008

Interior permanent magnet motor and rotor patent, April 2011

Interior permanent magnet motor including rotor with flux barriers patent, April 2011

Rotor for an electric motor patent-application, July 2006

Rotor with a cover plate for securing a magnet in the rotor patent-application, July 2006

Distributed Coil Stator for External Rotor Three Phase Electric Motors patent, February 2008

Interior Permanent Magnet Motor Including Rotor With Flux Barriers patent-application, September 2008

Self-Starting Type Permanent Magnet Synchronous Motor and a Compressor Using the Same patent-application, June 2009

Rotational Angle Detection Device And Method For Permanent Magnet Dynamo-Electric Machine And Electric Power Steering Device patent-application, July 2009

Permanent-Magnet (PM) Rotors and Systems patent, June 2010

Self-Starting Permanent Magnet Synchronous Motor And Compressor And Refrigeration Cycle Using The Same patent-application, February 2011

Method And Apparatus For Compensating A Line Synchronous Generator patent, June 2011

Permanent Magnet Excited Synchronous Machine With Embedded Magnets patent-application, July 2012

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

Permanent magnet rotor
patent, September 1983

High efficiency, low cost permanent magnet AC machine
patent, October 1984

Permanent magnet laminated rotor with conductor bars
patent, February 1986

Method of fabricating composite rotor laminations for use in reluctance, homopolar and permanent magnet machines
patent, April 1990

Rotor lamination for an AC permanent magnet synchronous motor
patent, March 1992

Hybrid-energized electric machine
patent, September 1997

Reluctance type rotating machine with permanent magnets
patent, April 2003

Permanent magnet synchronous motor
patent, April 2004

Air conditioner having permanent magnet rotating electric machine
patent, July 2005

Rotor for reluctance type rotating machine
patent, January 2007

Rotor for an electric motor
patent, February 2007

Permanent magnet synchronous motor
patent, February 2007

Rotor for an electric motor
patent, July 2007

Permanent magnet synchronous motor
patent, May 2008

Cogging reduction in permanent magnet machines
patent, June 2008

Interior permanent magnet motor and rotor
patent, April 2011

Interior permanent magnet motor including rotor with flux barriers
patent, April 2011

Rotor for an electric motor
patent-application, July 2006

Rotor with a cover plate for securing a magnet in the rotor
patent-application, July 2006

Distributed Coil Stator for External Rotor Three Phase Electric Motors
patent, February 2008

Interior Permanent Magnet Motor Including Rotor With Flux Barriers
patent-application, September 2008

Self-Starting Type Permanent Magnet Synchronous Motor and a Compressor Using the Same
patent-application, June 2009

Rotational Angle Detection Device And Method For Permanent Magnet Dynamo-Electric Machine And Electric Power Steering Device
patent-application, July 2009

Permanent-Magnet (PM) Rotors and Systems
patent, June 2010

Self-Starting Permanent Magnet Synchronous Motor And Compressor And Refrigeration Cycle Using The Same
patent-application, February 2011

Method And Apparatus For Compensating A Line Synchronous Generator
patent, June 2011

Permanent Magnet Excited Synchronous Machine With Embedded Magnets
patent-application, July 2012