US20020089242A1 - Electric machine with laminated cooling rings - Google Patents
Electric machine with laminated cooling rings Download PDFInfo
- Publication number
- US20020089242A1 US20020089242A1 US09/758,871 US75887101A US2002089242A1 US 20020089242 A1 US20020089242 A1 US 20020089242A1 US 75887101 A US75887101 A US 75887101A US 2002089242 A1 US2002089242 A1 US 2002089242A1
- Authority
- US
- United States
- Prior art keywords
- stator core
- electric machine
- aluminum
- end turns
- potting material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/223—Heat bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Definitions
- the present invention relates to an electric machine having laminated cooling rings adjacent end turns of the stator core windings for transferring heat from the windings to the housing.
- stator windings of electric machines are critical for providing satisfactory motor performance, reliability and durability. This issue becomes even more pressing when the motor is required to have a high power density (kW/m 3 ) and low specific weight.
- An integrated starter/alternator is a good example where the electric motor is required to have high power density, low specific weight, and good cooling capability because of packaging constraints, fuel economy requirements, and the fact that the motor is in the engine compartment.
- FIG. 1 shows a prior art motor 10 having such a feature.
- the motor 10 consists of a rotatable rotor 12 rotatably positioned within a stator core 14 .
- the stator core 14 has first and second ends 16 , 18 with end turns 20 , 22 of the windings extending from the ends 16 , 18 , respectively.
- a housing 24 having end plates 26 , 28 encloses the stator core, windings and rotor.
- a thermally conductive potting material 30 is positioned over each of the end turns 20 , 22 for carrying heat directly from the end turns 20 , 22 to the housing 24 for heat dissipation.
- This potting technology provides limited value because the potting material has a fairly high thermal resistance, which limits the heat dissipation capacity. Additionally, the cooling potential of the potting material cannot be fully utilized because of gaps which are developed between the potting material and the winding, and between the potting material and the housing as a result of thermal cycling of the motor. The reason for the gap development is that the potting material, the winding and the housing have different thermal expansion coefficients. The gaps are filled with air, which provides minimal thermal conductivity.
- the present invention improves upon the above-described prior art cooling method by providing two laminated aluminum ring assemblies at the opposing ends of the stator core which are embedded within the potting material.
- the laminated aluminum rings substantially enhance heat dissipation, while the laminations reduce eddy current buildup within the rings.
- each lamination of the rings has a plurality of radially extending slots which provide air gaps to minimize eddy currents in a plane perpendicular to the central axis of the motor.
- the present invention provides an electric machine including a stator core having first and second ends and having windings therein with end turns of the windings protruding from the first and second ends of the stator core.
- a rotor is rotatably positioned within the stator core.
- First and second laminated aluminum ring assemblies are positioned against the first and second ends, respectively, of the stator core in contact with the housing.
- Thermally conductive potting material is positioned between the end turns and the respective first and second ring assembly at the first and second ends of the stator core, thereby creating heat dissipation paths from the end turns, through the potting material and the ring assemblies to the housing.
- an object of the invention is to provide an improved method and apparatus for cooling an electric machine wherein laminated aluminum ring assemblies are provided at opposing ends of the stator core for dissipating heat through a potting material from the end turns of the windings.
- FIG. 1 shows a schematically arranged partially cut-away vertical cross-sectional view of a prior art electric motor
- FIG. 2 shows a schematically arranged partially cut-away vertical cross-sectional view of an electric motor in accordance with the present invention.
- FIG. 3 shows a plan view of a ring for use with the ring assemblies shown in FIG. 2.
- the present invention provides an electric machine 10 including a rotor 12 rotatably positioned within a stator core 14 .
- the stator core 14 has first and second opposing ends 16 , 18 with end turns 20 , 22 of the stator core windings protruding from the respective ends 16 , 18 .
- a housing 24 includes first and second end plates 26 , 28 , which enclose the stator and rotor assembly.
- a potting material 30 is positioned around the first and second end turns 20 , 22 of the windings.
- First and second laminated aluminum rings 32 , 34 are positioned at the first and second ends 16 , 18 , respectively, of the stator core 14 in contact with the housing 24 for carrying heat from the end turns 20 , 22 through the potting material 30 , through the laminated aluminum rings 32 , 34 to the housing 24 .
- the housing 24 may be liquid cooled or air cooled, using configurations that are well known in the art.
- each lamination (ring) 36 of the laminated ring assemblies 32 , 34 is provided with a plurality of radially extending slots 38 extending from the annular inner edge 40 of each lamination 36 . These slots 38 extend approximately one-half the width of each ring 36 to reduce eddy currents in a plane perpendicular to a central axis of the electric machine.
- the present invention significantly improves cooling capability over the above-described prior art methods. Because the aluminum of the ring assemblies has much higher thermal conductivity than the potting material (about 300 times higher), this invention has much better cooling capability, and as a result, the winding temperature will be significantly lower.
- Another advantage of the present invention is that motor efficiency will be improved. Since the invention can lower the winding temperature significantly, the copper loss in the winding will be reduced significantly because lower temperature leads to lower winding resistance.
- the aluminum rings potted to the end windings also improves the stiffness of the electric machine.
- This invention has a wide range of applications. It can be used for any variety of electric machines, but has particular applicability in the auto industry because the auto industry typically provides harsh thermal operating conditions.
- the invention can be used in traction motors for fuel cell EV, pure EV and hybrid EV (electric vehicle). Also, an integrated starter/alternator or high output alternator are good applications. The simplicity of the design makes the invention very easy to implement.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to an electric machine having laminated cooling rings adjacent end turns of the stator core windings for transferring heat from the windings to the housing.
- 2. Background Art
- The cooling of stator windings of electric machines is critical for providing satisfactory motor performance, reliability and durability. This issue becomes even more pressing when the motor is required to have a high power density (kW/m3) and low specific weight. An integrated starter/alternator is a good example where the electric motor is required to have high power density, low specific weight, and good cooling capability because of packaging constraints, fuel economy requirements, and the fact that the motor is in the engine compartment.
- Thermally conductive epoxy potting materials have been applied on the end turn windings to improve the cooling of an electric motor. FIG. 1 shows a
prior art motor 10 having such a feature. As shown, themotor 10 consists of arotatable rotor 12 rotatably positioned within astator core 14. Thestator core 14 has first andsecond ends ends housing 24 havingend plates conductive potting material 30 is positioned over each of the end turns 20,22 for carrying heat directly from the end turns 20,22 to thehousing 24 for heat dissipation. - This potting technology provides limited value because the potting material has a fairly high thermal resistance, which limits the heat dissipation capacity. Additionally, the cooling potential of the potting material cannot be fully utilized because of gaps which are developed between the potting material and the winding, and between the potting material and the housing as a result of thermal cycling of the motor. The reason for the gap development is that the potting material, the winding and the housing have different thermal expansion coefficients. The gaps are filled with air, which provides minimal thermal conductivity.
- Accordingly, it is desirable to provide an improved method and apparatus for cooling an electric machine.
- The present invention improves upon the above-described prior art cooling method by providing two laminated aluminum ring assemblies at the opposing ends of the stator core which are embedded within the potting material. The laminated aluminum rings substantially enhance heat dissipation, while the laminations reduce eddy current buildup within the rings.
- In a preferred embodiment, each lamination of the rings has a plurality of radially extending slots which provide air gaps to minimize eddy currents in a plane perpendicular to the central axis of the motor.
- More specifically, the present invention provides an electric machine including a stator core having first and second ends and having windings therein with end turns of the windings protruding from the first and second ends of the stator core. A rotor is rotatably positioned within the stator core. First and second laminated aluminum ring assemblies are positioned against the first and second ends, respectively, of the stator core in contact with the housing. Thermally conductive potting material is positioned between the end turns and the respective first and second ring assembly at the first and second ends of the stator core, thereby creating heat dissipation paths from the end turns, through the potting material and the ring assemblies to the housing.
- Accordingly, an object of the invention is to provide an improved method and apparatus for cooling an electric machine wherein laminated aluminum ring assemblies are provided at opposing ends of the stator core for dissipating heat through a potting material from the end turns of the windings.
- The above object and other objects, features and advantages of the invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accompanying drawings.
- FIG. 1FIG. 1 shows a schematically arranged partially cut-away vertical cross-sectional view of a prior art electric motor;
- FIG. 2 shows a schematically arranged partially cut-away vertical cross-sectional view of an electric motor in accordance with the present invention; and
- FIG. 3 shows a plan view of a ring for use with the ring assemblies shown in FIG. 2.
- The present invention will now be described with reference to FIG. 2, wherein like reference numerals will be used to describe like components as described previously with respect to FIG. 1.
- As shown, the present invention provides an
electric machine 10 including arotor 12 rotatably positioned within astator core 14. Thestator core 14 has first andsecond opposing ends respective ends housing 24 includes first andsecond end plates - A
potting material 30 is positioned around the first and second end turns 20,22 of the windings. First and second laminatedaluminum rings second ends stator core 14 in contact with thehousing 24 for carrying heat from the end turns 20,22 through thepotting material 30, through the laminatedaluminum rings housing 24. - The
housing 24 may be liquid cooled or air cooled, using configurations that are well known in the art. - The laminations of the laminated aluminum ring assemblies32,34 are insulated to reduce eddy current losses. Additionally, because the magnetic fields around the
end turn windings ring assemblies slots 38 extending from the annularinner edge 40 of eachlamination 36. Theseslots 38 extend approximately one-half the width of eachring 36 to reduce eddy currents in a plane perpendicular to a central axis of the electric machine. - The present invention significantly improves cooling capability over the above-described prior art methods. Because the aluminum of the ring assemblies has much higher thermal conductivity than the potting material (about 300 times higher), this invention has much better cooling capability, and as a result, the winding temperature will be significantly lower.
- The potential of this cooling method is fully utilized because there will not be any gaps developed between the winding and the layer of potting material and between the ring and the potting material. The reason is that a
flexible potting material 30 can be used. Even though the flexible potting material has higher thermal resistance than the non-flexible potting material, the total thermal resistance from the windings to the housing is still much lower than that of the existing potting technology. This is because the potting material is minimized in thickness. The existing potting technology must use a non-flexible potting material, which has a lower thermal resistance than the flexible one, for the thermal resistance reason because of the thickness of the potting material layer. - Another advantage of the present invention is that motor efficiency will be improved. Since the invention can lower the winding temperature significantly, the copper loss in the winding will be reduced significantly because lower temperature leads to lower winding resistance.
- The aluminum rings potted to the end windings also improves the stiffness of the electric machine.
- This invention has a wide range of applications. It can be used for any variety of electric machines, but has particular applicability in the auto industry because the auto industry typically provides harsh thermal operating conditions. For example, the invention can be used in traction motors for fuel cell EV, pure EV and hybrid EV (electric vehicle). Also, an integrated starter/alternator or high output alternator are good applications. The simplicity of the design makes the invention very easy to implement.
- While the best mode for carrying out the invention has been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the invention within the scope of the appended claims.
Claims (12)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/758,871 US6445095B1 (en) | 2001-01-11 | 2001-01-11 | Electric machine with laminated cooling rings |
US09/683,018 US6744158B2 (en) | 2001-01-11 | 2001-11-08 | Electric machine with cooling rings |
GB0129939A GB2374732A (en) | 2001-01-11 | 2001-12-14 | An electrical machine with laminated cooling rings for end turns |
DE10201012A DE10201012B4 (en) | 2001-01-11 | 2002-01-11 | Electric machine with laminated cooling rings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/758,871 US6445095B1 (en) | 2001-01-11 | 2001-01-11 | Electric machine with laminated cooling rings |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/683,018 Continuation-In-Part US6744158B2 (en) | 2001-01-11 | 2001-11-08 | Electric machine with cooling rings |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020089242A1 true US20020089242A1 (en) | 2002-07-11 |
US6445095B1 US6445095B1 (en) | 2002-09-03 |
Family
ID=25053415
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/758,871 Expired - Fee Related US6445095B1 (en) | 2001-01-11 | 2001-01-11 | Electric machine with laminated cooling rings |
US09/683,018 Expired - Fee Related US6744158B2 (en) | 2001-01-11 | 2001-11-08 | Electric machine with cooling rings |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/683,018 Expired - Fee Related US6744158B2 (en) | 2001-01-11 | 2001-11-08 | Electric machine with cooling rings |
Country Status (3)
Country | Link |
---|---|
US (2) | US6445095B1 (en) |
DE (1) | DE10201012B4 (en) |
GB (1) | GB2374732A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2057731A2 (en) * | 2006-08-15 | 2009-05-13 | Bombardier Transportation GmbH | Semi-enclosed ac motor |
EP2109208A1 (en) * | 2008-04-10 | 2009-10-14 | Siemens Aktiengesellschaft | Stator arrangement, generator and wind turbine |
US20100090561A1 (en) * | 2005-06-28 | 2010-04-15 | Valeo Equipements Electriques Moteur | Projecting pole rotor comprising coil end support plates and rotary electric machine comprising one such rotor |
WO2013067626A1 (en) * | 2011-11-08 | 2013-05-16 | Tm4 Inc. | Cooling assembly for electric machines |
US20130342051A1 (en) * | 2009-09-29 | 2013-12-26 | Regal Beloit America, Inc. | Air cooled electric motor |
ITMI20121301A1 (en) * | 2012-07-25 | 2014-01-26 | Wilic Sarl | ACTIVE SEGMENT OF A ROTARY ELECTRIC MACHINE FOR THE AIRCONDITIONER, ROTARY ELECTRIC MACHINE, AND VENTILATOR |
WO2013034413A3 (en) * | 2011-09-08 | 2014-06-19 | Siemens Aktiengesellschaft | Stator for an electric motor |
CN106300810A (en) * | 2015-06-23 | 2017-01-04 | 马自达汽车株式会社 | The cooling structure of electro-motor |
JP2017535232A (en) * | 2014-09-18 | 2017-11-24 | プリペル テクノロジーズ,リミティド ライアビリティ カンパニー | Electromechanical cigar cooling device |
EP3719962A1 (en) * | 2019-04-01 | 2020-10-07 | LIM-Tech Limited | Electromotive machine |
WO2021038168A1 (en) | 2019-08-27 | 2021-03-04 | Moving Magnet Technologies | Machine with toroidal winding |
US11025138B2 (en) | 2016-01-11 | 2021-06-01 | Bayerische Motoren Werke Aktiengesellschaft | Electric machine |
US11088585B2 (en) * | 2016-03-09 | 2021-08-10 | Denso Corporation | Motor with potting section and hole provided with cap through which winding is inserted |
WO2023061684A1 (en) * | 2021-10-13 | 2023-04-20 | Bayerische Motoren Werke Aktiengesellschaft | Assembly for an electric machine of a motor vehicle, method and motor vehicle |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19902837C1 (en) * | 1999-01-20 | 2000-08-10 | Siemens Ag | Rotating electrical machine with permanently excited rotor |
JP2002153034A (en) * | 2000-11-07 | 2002-05-24 | Sanshin Ind Co Ltd | Generator in outboard motor |
US6445095B1 (en) * | 2001-01-11 | 2002-09-03 | Ford Global Technologies, Inc. | Electric machine with laminated cooling rings |
DE10114321A1 (en) * | 2001-03-23 | 2002-10-24 | Siemens Ag | Electrical machine |
US6798091B2 (en) * | 2001-11-29 | 2004-09-28 | Sanyo Denki Co., Ltd. | Watertight brushless fan motor |
JP4038056B2 (en) * | 2002-02-27 | 2008-01-23 | ミネベア株式会社 | Rotating electric machine |
FI116789B (en) * | 2002-04-17 | 2006-02-28 | Kone Corp | Attachment of the stator in a flat lift motor |
US20050057106A1 (en) * | 2002-12-10 | 2005-03-17 | Ballard Power Systems Corporation | Methods and systems for electric machines having windings |
US6891308B2 (en) * | 2003-02-18 | 2005-05-10 | Reliance Electric Technologies, Llc | Extended core for motor/generator |
US7583063B2 (en) * | 2003-05-27 | 2009-09-01 | Pratt & Whitney Canada Corp. | Architecture for electric machine |
DE10324680A1 (en) * | 2003-05-30 | 2004-12-23 | Siemens Ag | Electrical machine with flameproof encapsulated stator |
DE102004018525A1 (en) * | 2004-04-14 | 2005-11-17 | Voith Turbo Gmbh & Co. Kg | Winding unit |
US7498710B2 (en) * | 2006-03-29 | 2009-03-03 | Rao Dantam K | Cooling of stator windings |
US20070278867A1 (en) * | 2006-05-30 | 2007-12-06 | Andover, Inc., A Division Of Cavu Ops, Inc. | Expoxy encapsulated stator |
US7579724B2 (en) * | 2006-06-02 | 2009-08-25 | General Electric Company | Methods and apparatus for using an electrical machine to transport fluids through a pipeline |
US7948126B2 (en) * | 2007-03-16 | 2011-05-24 | Remy Technologies, L.L.C. | Liquid cooling system of an electric machine |
BE1019030A5 (en) | 2009-08-03 | 2012-01-10 | Atlas Copco Airpower Nv | TURBO COMPRESSOR SYSTEM. |
WO2011030499A1 (en) * | 2009-09-14 | 2011-03-17 | Three Eye Co., Ltd. | Switched reluctance motor apparatus |
SE534838C2 (en) * | 2010-05-21 | 2012-01-17 | Bae Systems Haegglunds Ab | Electric motor cooling device |
US9048710B2 (en) | 2011-08-29 | 2015-06-02 | Remy Technologies, Llc | Electric machine module cooling system and method |
US20130162071A1 (en) * | 2011-12-22 | 2013-06-27 | Bradley D. Chamberlin | Electric machine with encapsulated end turns |
DE102012206442A1 (en) * | 2012-04-19 | 2013-10-24 | Robert Bosch Gmbh | Stator for an electric machine with winding heads pressed into a housing |
US9306428B2 (en) * | 2012-09-19 | 2016-04-05 | Remy Technologies, Llc | Motor cooling system with potted end turns |
DE102012219160A1 (en) * | 2012-10-19 | 2014-04-24 | Schmid & Wezel Gmbh & Co. | Hand-held butcher machine with a tight casing |
DE102012223976A1 (en) * | 2012-12-20 | 2014-06-26 | Hilti Aktiengesellschaft | Stator pressed with winding head support |
US9537375B2 (en) * | 2013-05-10 | 2017-01-03 | General Electric Company | Thermal conductor for use in an electric machine and method of forming the same |
JP5831533B2 (en) * | 2013-12-02 | 2015-12-09 | ダイキン工業株式会社 | Compressor |
US9509194B2 (en) * | 2014-01-07 | 2016-11-29 | Ge Aviation Systems Llc | Generator assembly |
US9543814B2 (en) | 2014-01-07 | 2017-01-10 | Ge Aviation Systems Llc | Method of making a heat transfer element for an electric machine |
US20160285346A1 (en) * | 2015-03-27 | 2016-09-29 | Russel Hugh Marvin | Cooling device for motor |
US9537301B1 (en) * | 2015-08-07 | 2017-01-03 | General Electric Company | System and method for generator braking |
DE102015218929A1 (en) * | 2015-09-30 | 2017-03-30 | Siemens Aktiengesellschaft | Electric machine with thermal coupling of the winding heads to a stator support structure through ceramic rings |
CN107947401A (en) * | 2016-10-13 | 2018-04-20 | 上海大郡动力控制技术有限公司 | Cooling structure for new energy car ventilated machine stator winding |
US10630127B1 (en) | 2017-01-06 | 2020-04-21 | Apple Inc. | Electric motor with bar wound stator and end turn cooling |
CN107947479A (en) * | 2018-01-08 | 2018-04-20 | 华南理工大学 | A kind of automobile motor stator module and its method for packing based on convection conduct heat material |
CN109861458B (en) * | 2019-02-19 | 2024-03-12 | 格力博(江苏)股份有限公司 | High-pressure pump |
DE102021113691A1 (en) * | 2021-05-27 | 2022-12-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Stator of an electric drive machine and method of manufacturing the same |
EP4145682A1 (en) * | 2021-09-03 | 2023-03-08 | SKF Magnetic Mechatronics | Rotary electrical machine and stator assembly for such machine |
KR20230081426A (en) * | 2021-11-30 | 2023-06-07 | 현대자동차주식회사 | Cooling Structure for End Coil of Induction Motor |
DE102021133129A1 (en) * | 2021-12-14 | 2023-06-15 | Jungheinrich Aktiengesellschaft | Drive axle arrangement for an electrically powered industrial truck |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT151584B (en) * | 1935-07-18 | 1937-11-25 | Siemens Ag | Device for improving the heat dissipation of electrical machines. |
US2975309A (en) * | 1958-07-18 | 1961-03-14 | Komplex Nagyberendezesek Expor | Oil-cooled stators for turboalternators |
US3075107A (en) * | 1958-12-29 | 1963-01-22 | Gen Electric | Canned motor |
FR1252659A (en) * | 1959-12-03 | 1961-02-03 | Acec | Stator plate clamping plate |
DE1204316B (en) * | 1960-11-14 | 1965-11-04 | Westinghouse Electric Corp | Cooling device for electrical machines with a can using heat conductors |
US3155856A (en) * | 1960-11-14 | 1964-11-03 | Westinghouse Electric Corp | Dynamoelectric machinery |
US3525889A (en) * | 1967-02-10 | 1970-08-25 | North American Rockwell | Method of bonding laminates and impregnating the winding on a stator core and product thereof |
US3508092A (en) * | 1968-06-19 | 1970-04-21 | Air Reduction | Heat sink for stator winding of dynamo-electric machine |
FR2087126A5 (en) | 1970-05-05 | 1971-12-31 | Brissonneau & Lotz | |
GB1468808A (en) * | 1974-07-24 | 1977-03-30 | Prestcold Ltd | Refrigeration compressor units |
US4054809A (en) * | 1976-02-27 | 1977-10-18 | General Electric Company | Stator core end magnetic shield for large A.C. machines |
DE3133734C2 (en) * | 1981-08-26 | 1985-04-25 | Loher Gmbh, 8399 Ruhstorf | Process for coating or potting winding heads of electrical devices and application for impregnation |
JPS5893442A (en) * | 1981-11-26 | 1983-06-03 | Hitachi Ltd | Stator for canned motor and manufacture thereof |
DE3147829A1 (en) | 1981-12-03 | 1983-06-16 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTRIC COLLECTOR MACHINE, IN PARTICULAR AS A DRIVE MOTOR FOR VEHICLES |
DE3422743A1 (en) | 1984-06-19 | 1985-12-19 | Ebm Elektrobau Mulfingen Gmbh & Co, 7119 Mulfingen | EXTERNAL ROTOR MOTOR WITH SCREW-IN MOTOR FLANGE |
JPS61121729A (en) * | 1984-11-14 | 1986-06-09 | Fanuc Ltd | Liquid cooled motor |
US4651039A (en) * | 1985-02-08 | 1987-03-17 | Mitsubishi Denki Kabushiki Kaisha | Molded-type underwater motor |
JPH01202140A (en) | 1988-02-03 | 1989-08-15 | Mitsubishi Electric Corp | Vehicle ac generator and its manufacture |
US4864176A (en) * | 1988-07-29 | 1989-09-05 | Rem Technologies, Inc. | Stator support structure with stamped end plates |
DE3942768A1 (en) | 1989-07-08 | 1991-01-17 | Bosch Gmbh Robert | ELECTRICAL MACHINE, PREFERABLY THREE-PHASE GENERATOR FOR MOTOR VEHICLES |
DE8915212U1 (en) * | 1989-07-08 | 1990-10-31 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
US5578879A (en) | 1989-09-28 | 1996-11-26 | Heidelberg; G+E,Uml O+Ee Tz | Electric machine with fluid cooling |
US5101128A (en) * | 1990-08-23 | 1992-03-31 | Westinghouse Electric Corp. | System and method for cooling a submersible electric propulsor |
DE4042432C2 (en) * | 1990-12-24 | 1994-05-05 | Orto Holding Ag Luxemburg Luxe | Electronically commutated DC machine |
FI105293B (en) * | 1993-06-08 | 2000-07-14 | Picker Nordstar Oy | Polar shoe for magnetic resonance imaging |
US5394043A (en) * | 1993-06-29 | 1995-02-28 | American Precision Industries Inc. | High speed brushless motor |
US5363002A (en) | 1993-07-28 | 1994-11-08 | Sundstrand Corporation | Dynamoelectric machine having fluid cooling of back iron and end turns |
JP3395332B2 (en) * | 1994-03-16 | 2003-04-14 | 三菱電機株式会社 | Stator for vehicle alternator and method of manufacturing the same |
US5789833A (en) * | 1995-11-24 | 1998-08-04 | Kabushiki Kaisha Toshiba | Totally-enclosed traction motor for electric railcar |
JPH1189130A (en) * | 1997-09-08 | 1999-03-30 | Minebea Co Ltd | Motor construction |
US6201321B1 (en) * | 1998-06-05 | 2001-03-13 | Bayside Controls, Inc. | Apparatus and method for dissipating heat from a motor |
DE19902837C1 (en) * | 1999-01-20 | 2000-08-10 | Siemens Ag | Rotating electrical machine with permanently excited rotor |
US6445095B1 (en) * | 2001-01-11 | 2002-09-03 | Ford Global Technologies, Inc. | Electric machine with laminated cooling rings |
-
2001
- 2001-01-11 US US09/758,871 patent/US6445095B1/en not_active Expired - Fee Related
- 2001-11-08 US US09/683,018 patent/US6744158B2/en not_active Expired - Fee Related
- 2001-12-14 GB GB0129939A patent/GB2374732A/en not_active Withdrawn
-
2002
- 2002-01-11 DE DE10201012A patent/DE10201012B4/en not_active Expired - Fee Related
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100090561A1 (en) * | 2005-06-28 | 2010-04-15 | Valeo Equipements Electriques Moteur | Projecting pole rotor comprising coil end support plates and rotary electric machine comprising one such rotor |
US8120227B2 (en) | 2005-06-28 | 2012-02-21 | Valeo Equipements Electriques Moteur | Projecting pole rotor comprising coil end support plates and rotary electric machine comprising one such rotor |
EP2057731A2 (en) * | 2006-08-15 | 2009-05-13 | Bombardier Transportation GmbH | Semi-enclosed ac motor |
EP2057731A4 (en) * | 2006-08-15 | 2011-01-19 | Bombardier Transp Gmbh | Semi-enclosed ac motor |
EP2109208A1 (en) * | 2008-04-10 | 2009-10-14 | Siemens Aktiengesellschaft | Stator arrangement, generator and wind turbine |
US20090256431A1 (en) * | 2008-04-10 | 2009-10-15 | Siemens Aktiengesellschaft | Stator arrangement, generator and wind turbine |
US8022581B2 (en) | 2008-04-10 | 2011-09-20 | Siemens Aktiengesellschaft | Stator arrangement, generator and wind turbine |
US9391493B2 (en) * | 2009-09-29 | 2016-07-12 | Regal Beloit America, Inc. | Air cooled electric motor |
US20130342051A1 (en) * | 2009-09-29 | 2013-12-26 | Regal Beloit America, Inc. | Air cooled electric motor |
CN103959606A (en) * | 2011-09-08 | 2014-07-30 | 西门子公司 | Stator for electric motor |
US9768666B2 (en) | 2011-09-08 | 2017-09-19 | Siemens Aktiengesellschaft | External cooling tube arrangement for a stator of an electric motor |
WO2013034413A3 (en) * | 2011-09-08 | 2014-06-19 | Siemens Aktiengesellschaft | Stator for an electric motor |
WO2013067626A1 (en) * | 2011-11-08 | 2013-05-16 | Tm4 Inc. | Cooling assembly for electric machines |
US9397537B2 (en) | 2011-11-08 | 2016-07-19 | Tm4 Inc. | Cooling assembly for electric machines |
ITMI20121301A1 (en) * | 2012-07-25 | 2014-01-26 | Wilic Sarl | ACTIVE SEGMENT OF A ROTARY ELECTRIC MACHINE FOR THE AIRCONDITIONER, ROTARY ELECTRIC MACHINE, AND VENTILATOR |
WO2014016802A3 (en) * | 2012-07-25 | 2014-03-20 | Wilic S.Ar.L. | Active segment of a wind turbine rotary electric machine, rotary electric machine, and wind turbine |
US9698641B2 (en) | 2012-07-25 | 2017-07-04 | Windfin B.V. | Active segment of a wind turbine rotary electric machine, rotary electric machine, and wind turbine |
JP2017535232A (en) * | 2014-09-18 | 2017-11-24 | プリペル テクノロジーズ,リミティド ライアビリティ カンパニー | Electromechanical cigar cooling device |
CN106300810A (en) * | 2015-06-23 | 2017-01-04 | 马自达汽车株式会社 | The cooling structure of electro-motor |
US11025138B2 (en) | 2016-01-11 | 2021-06-01 | Bayerische Motoren Werke Aktiengesellschaft | Electric machine |
US11088585B2 (en) * | 2016-03-09 | 2021-08-10 | Denso Corporation | Motor with potting section and hole provided with cap through which winding is inserted |
US11715986B2 (en) | 2016-03-09 | 2023-08-01 | Denso Corporation | Motor including winding including inner bent portion and outer bent portion and method of manufacturing motor |
EP3719962A1 (en) * | 2019-04-01 | 2020-10-07 | LIM-Tech Limited | Electromotive machine |
US11476731B2 (en) | 2019-04-01 | 2022-10-18 | LIM-Tech Limited | Electromotive machine |
WO2021038168A1 (en) | 2019-08-27 | 2021-03-04 | Moving Magnet Technologies | Machine with toroidal winding |
FR3100399A1 (en) * | 2019-08-27 | 2021-03-05 | Moving Magnet Technologies | Toroidal winding machine |
WO2023061684A1 (en) * | 2021-10-13 | 2023-04-20 | Bayerische Motoren Werke Aktiengesellschaft | Assembly for an electric machine of a motor vehicle, method and motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
GB0129939D0 (en) | 2002-02-06 |
US20020089244A1 (en) | 2002-07-11 |
US6445095B1 (en) | 2002-09-03 |
GB2374732A (en) | 2002-10-23 |
DE10201012B4 (en) | 2006-03-09 |
US6744158B2 (en) | 2004-06-01 |
DE10201012A1 (en) | 2002-07-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6445095B1 (en) | Electric machine with laminated cooling rings | |
US11025138B2 (en) | Electric machine | |
CN111699612B (en) | Stator, rotary field machine comprising such a stator and method for producing such a stator | |
CN111699619B (en) | Stator for a rotary field machine with axial heat dissipation | |
KR100399739B1 (en) | Alternator | |
US6181045B1 (en) | Alternator for vehicle | |
US11979063B2 (en) | Rotating electric machine | |
Liu et al. | Thermal management and cooling of windings in electrical machines for electric vehicle and traction application | |
US20210384789A1 (en) | Armature | |
CN111712993B (en) | External stator of an electric motor having stator tooth sets, each stator tooth set having two adjacent stator teeth and a connecting yoke | |
US20100244617A1 (en) | Stator having improved structure for restricting relative displacement between stator core and stator coil | |
US7800261B2 (en) | Rotary electric machine with stator outer surface designed to enhance heat dissipation | |
KR20010086276A (en) | Alternator | |
JP3744184B2 (en) | AC generator for vehicles | |
JP4415433B2 (en) | Electric motor | |
KR100380796B1 (en) | Alternator | |
JP7030961B2 (en) | Stator and rotary machine | |
US20030077476A1 (en) | Stacked sheet metal laminate | |
CN115868103A (en) | Electric machine | |
US20240039368A1 (en) | Internal cooling systems for e-machines | |
US20240162786A1 (en) | Internal cooling systems for e-machines | |
US20220399766A1 (en) | Stator cooling assembly for electric machine | |
US20230179066A1 (en) | High torque density electric machine with directly cooled end windings | |
CN112840526B (en) | Rotary electric machine | |
US20240048014A1 (en) | Insulation system and method of insulating |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FORD MOTOR COMPANY, A DELAWARE CORPORATION, MICHIG Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIANG, FENG;MILLER, JOHN M.;REEL/FRAME:011480/0141;SIGNING DATES FROM 20001208 TO 20010109 Owner name: FORD GLOBAL TECHNOLOGIES, INC. A MICHIGAN CORPORAT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FORD MOTOR COMPANY A DELAWARE CORPORATION;REEL/FRAME:011480/0221 Effective date: 20010109 |
|
AS | Assignment |
Owner name: BALLARD POWER SYSTEMS CORPORATION, MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FORD GLOBAL TECHNOLOGIES, INC.;REEL/FRAME:013897/0598 Effective date: 20021217 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: SIEMENS VDO AUTOMOTIVE CORPORATION,MICHIGAN Free format text: CHANGE OF NAME;ASSIGNOR:BALLARD POWER SYSTEMS CORPORATION;REEL/FRAME:019077/0840 Effective date: 20070215 Owner name: SIEMENS VDO AUTOMOTIVE CORPORATION, MICHIGAN Free format text: CHANGE OF NAME;ASSIGNOR:BALLARD POWER SYSTEMS CORPORATION;REEL/FRAME:019077/0840 Effective date: 20070215 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20100903 |