Torque ripple reduction in electric machines

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

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Title: Torque ripple reduction in electric machines

Abstract

An electric machine, such as an Internal Permanent magnet or Synchronous Reluctance machine, having X phases, that includes a stator assembly, having M slots, with a stator core and stator teeth, that is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface that defines a cavity; and a rotor assembly, having N poles, disposed within the cavity which is configured to rotate about the longitudinal axis, wherein the rotor assembly includes a shaft, a rotor core located circumferentially around the shaft. The machine is configured such that a value k=M/(X*N) wherein k is a non-integer greater than about 1.3. The electric machine may alternatively, or additionally, include a non-uniformed gap between the exterior surface of the rotor spokes and the interior stator surface of the stator.

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

Issue Date:: Tue Aug 22 00:00:00 EDT 2017

Research Org.:: GENERAL ELECTRIC COMPANY, Niskayuna, NY) (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1375935

Patent Number(s):: 9742228

Application Number:: 14/057,591

Assignee:: GENERAL 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
H02K1/146 - {consisting of a generally annular yoke with salient poles}
H02K1/27 - Rotor cores with permanent magnets {
H02K1/2733 - {Annular magnets}
H02K1/2773 - {consisting of tangentially magnetized radial magnets}
H02K21/16 - having annular armature cores with salient poles
H02K2213/03 - Machines characterised by numerical values, ranges, mathematical expressions or similar information
H02K29/03 - with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Show less

DOE Contract Number:: EE0005573

Resource Type:: Patent

Resource Relation:: Patent File Date: 2013 Oct 18

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Reddy, Patel Bhageerath, Huh, Kum-Kang, El-Refaie, Ayman Mohamed Fawzi, and Galioto, Steven Joseph. Torque ripple reduction in electric machines.  United States: N. p., 2017. 
        Web.

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                    Reddy, Patel Bhageerath, Huh, Kum-Kang, El-Refaie, Ayman Mohamed Fawzi, & Galioto, Steven Joseph. Torque ripple reduction in electric machines.  United States.

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                    Reddy, Patel Bhageerath, Huh, Kum-Kang, El-Refaie, Ayman Mohamed Fawzi, and Galioto, Steven Joseph. Tue .  
        "Torque ripple reduction in electric machines".  United States.  https://www.osti.gov/servlets/purl/1375935.

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@article{osti_1375935,

  title        = {Torque ripple reduction in electric machines},

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

  abstractNote = {An electric machine, such as an Internal Permanent magnet or Synchronous Reluctance machine, having X phases, that includes a stator assembly, having M slots, with a stator core and stator teeth, that is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface that defines a cavity; and a rotor assembly, having N poles, disposed within the cavity which is configured to rotate about the longitudinal axis, wherein the rotor assembly includes a shaft, a rotor core located circumferentially around the shaft. The machine is configured such that a value k=M/(X*N) wherein k is a non-integer greater than about 1.3. The electric machine may alternatively, or additionally, include a non-uniformed gap between the exterior surface of the rotor spokes and the interior stator surface of the stator.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Aug 22 00:00:00 EDT 2017},

  month        = {Tue Aug 22 00:00:00 EDT 2017}

}

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Works referenced in this record:

Synchronous reluctance electrical motor having a low torque-ripple design
patent, October 1998

Vagati, Alfredo
US Patent Document 5,818,140
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5818140

Method and apparatus for torque ripple reduction in sinusoidally excited brushless permanent magnet motors
patent, April 2002

Sebastian, Tomy; Murthy, Sunil Keshava; Liu, Buyun
US Patent Document 6,380,658
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6380658

Rotor having multiple permanent-magnet pieces in a cavity
patent, March 2009

Jahns, Thomas M.; Guven, Mustafa Kamil; Aydin, Metin
US Patent Document 7,504,754
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7504754

Electric machine
patent, March 2011

Han, Seok-hee; Guven, Mustafa Kamil; Jahns, Thomas M.
US Patent Document 7,902,710
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7902710

Cooling system for rotating machine
patent, August 2011

Gerstler, William Dwight; El-Refaie, Ayman Mohamed Fawzi; Lokhandwalla, Murtuza
US Patent Document 7,994,668
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7994668

Dovetail spoke internal permanent magnet machine
patent, August 2011

Alexander, James Pellegrino; El-Refaie, Ayman Mohamed Fawzi; Lokhandwalla, Murtuza
US Patent Document 8,004,140
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8004140

Induction motor lamination design
patent, April 2012

Tang, Yifan
US Patent Document 8,154,167
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8154167

Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine
patent, March 2013

Tajima, Fumio; Matsunobu, Yutaka; Kitamura, Masashi
US Patent Document RE44,037
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/RE44037

Permanent magnet electric machine and permanent magnet with linearly increasing air gap for an electric machine
patent, April 2013

Mantere, Juhani; Ryyppö, Tommi; Szucs, Aron
US Patent Document 8,421,291
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8421291

Interior permanent magnet synchronous motor
patent-application, April 2002

Miyashita, Toshihito; Onodera, Satoru; Matsushita, Manabu
US Patent Document 09/951282; 20020047432
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20020047432

Permanent Magnet Embedment Rotating Electric Machine, Motor for Car Air Conditioner, and Enclosed Electric Compressor
patent-application, November 2007

Adaniya, Taku; Horiba, Tatsuya; Hirano, Taizo
US Patent Document 11/738318; 20070257576
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20070257576

Permanent-Magnet Reluctance Electrical Rotary Machine
patent-application, April 2008

Takahashi, Norio; Sakai, Kazuto; Arata, Masanori
US Patent Document 11/875529; 20080093944
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080093944

Permanent Magnet Rotating Electric Machine and Electric Car Using the Same
patent-application, July 2009

Tajima, Fumio; Matsunobu, Yutaka; Kitamura, Masashi
US Patent Document 12/406164; 20090179518
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20090179518

Induction Motor with Improved Torque Density
patent, June 2010

Tang, Yifan
US Patent Document 12/317730; 20100141080
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20100141080

Dovetail Spoke Internal Permanent Magnet Machine
patent-application, November 2010

Alexander, James Pellegrino; EL-Refaie, Ayman Mohamed Fawzi; Lokhandwalla, Murtuza
US Patent Document 12/432894; 20100277017
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20100277017

Fractional Slot Multiphase Machines with Open Slots for Simplified Conductor Insertion in a Stator
patent-application, January 2011

Blissenbach, Rolf; Dang, Dang Dinh; Hatch, Erik
US Patent Document 12/503692; 20110012467
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Rotating Electrical Machine
patent-application, June 2011

Sugimoto, Shinji; Komura, Akiyoshi; Obata, Koji
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Torque Ripple Reduction in Interior Permanent Magnet Synchronous Machines Using Stators With Odd Number of Slots Per Pole Pair
journal, March 2010

Han, Seok-Hee; Jahns, Thomas M.; Soong, Wen L.
IEEE Transactions on Energy Conversion, Vol. 25, Issue 1, p. 118-127
https://doi.org/10.1109/TEC.2009.2033196

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Similar Records

Title: Torque ripple reduction in electric machines

Abstract

Citation Formats

Synchronous reluctance electrical motor having a low torque-ripple design patent, October 1998

Method and apparatus for torque ripple reduction in sinusoidally excited brushless permanent magnet motors patent, April 2002

Rotor having multiple permanent-magnet pieces in a cavity patent, March 2009

Electric machine patent, March 2011

Cooling system for rotating machine patent, August 2011

Dovetail spoke internal permanent magnet machine patent, August 2011

Induction motor lamination design patent, April 2012

Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine patent, March 2013

Permanent magnet electric machine and permanent magnet with linearly increasing air gap for an electric machine patent, April 2013

Interior permanent magnet synchronous motor patent-application, April 2002

Permanent Magnet Embedment Rotating Electric Machine, Motor for Car Air Conditioner, and Enclosed Electric Compressor patent-application, November 2007

Permanent-Magnet Reluctance Electrical Rotary Machine patent-application, April 2008

Permanent Magnet Rotating Electric Machine and Electric Car Using the Same patent-application, July 2009

Induction Motor with Improved Torque Density patent, June 2010

Dovetail Spoke Internal Permanent Magnet Machine patent-application, November 2010

Fractional Slot Multiphase Machines with Open Slots for Simplified Conductor Insertion in a Stator patent-application, January 2011

Rotating Electrical Machine patent-application, June 2011

Torque Ripple Reduction in Interior Permanent Magnet Synchronous Machines Using Stators With Odd Number of Slots Per Pole Pair journal, March 2010

Synchronous reluctance electrical motor having a low torque-ripple design
patent, October 1998

Method and apparatus for torque ripple reduction in sinusoidally excited brushless permanent magnet motors
patent, April 2002

Rotor having multiple permanent-magnet pieces in a cavity
patent, March 2009

Electric machine
patent, March 2011

Cooling system for rotating machine
patent, August 2011

Dovetail spoke internal permanent magnet machine
patent, August 2011

Induction motor lamination design
patent, April 2012

Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine
patent, March 2013

Permanent magnet electric machine and permanent magnet with linearly increasing air gap for an electric machine
patent, April 2013

Interior permanent magnet synchronous motor
patent-application, April 2002

Permanent Magnet Embedment Rotating Electric Machine, Motor for Car Air Conditioner, and Enclosed Electric Compressor
patent-application, November 2007

Permanent-Magnet Reluctance Electrical Rotary Machine
patent-application, April 2008

Permanent Magnet Rotating Electric Machine and Electric Car Using the Same
patent-application, July 2009

Induction Motor with Improved Torque Density
patent, June 2010

Dovetail Spoke Internal Permanent Magnet Machine
patent-application, November 2010

Fractional Slot Multiphase Machines with Open Slots for Simplified Conductor Insertion in a Stator
patent-application, January 2011

Rotating Electrical Machine
patent-application, June 2011

Torque Ripple Reduction in Interior Permanent Magnet Synchronous Machines Using Stators With Odd Number of Slots Per Pole Pair
journal, March 2010