WO2024153501A1 - Elektrische maschine - Google Patents
Elektrische maschine Download PDFInfo
- Publication number
- WO2024153501A1 WO2024153501A1 PCT/EP2024/050418 EP2024050418W WO2024153501A1 WO 2024153501 A1 WO2024153501 A1 WO 2024153501A1 EP 2024050418 W EP2024050418 W EP 2024050418W WO 2024153501 A1 WO2024153501 A1 WO 2024153501A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- heat exchange
- exchange element
- electrical machine
- heat
- 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.)
- Ceased
Links
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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/527—Fastening salient pole windings or connections thereto applicable to rotors only
Definitions
- the invention relates to an electrical machine with a rotor that is rotatably mounted relative to a stator, having at least one heat exchange element arranged between two adjacent windings of the rotor, which is designed to dissipate heat generated during operation of the electrical machine.
- Electric machines can be used as working machines for electrically powered motor vehicles, for example electric and hybrid vehicles. Electric machines of various types can be used here, with an electric machine typically having a stator that is fixed in position or rotationally fixed and a rotor that is movably mounted relative to the stator.
- active components have magnetic field-generating systems, for example in the form of energizable windings, which are held by an iron core to generate a magnetic flux.
- Such windings can heat up during operation of the electrical machine, which can lead to local hot spots, for example due to an inhomogeneous temperature distribution in the winding. Since heating of the electrical machine can have a negative impact on efficiency and continuous performance, solutions for cooling the electrical machine are known in which the rotor can be cooled with a cooling fluid, for example by means of rotor hollow shaft cooling and/or on one end face by means of end face cooling.
- an electrical machine is specified with a rotor that is mounted so as to be rotatable relative to a stator, having at least one heat exchange element arranged between two adjacent windings of the rotor, which is designed to conduct heat generated during operation of the electrical machine to at least one end face of the rotor.
- the heat exchange element is designed in particular to transport the waste heat absorbed in the region of the windings in the direction of one or both end faces of the rotor or the electrical machine and to release it there to a heat sink of the rotor or the electrical machine to dissipate the waste heat. This can bring about cooling or improved heat distribution in the rotor, so that the efficiency and/or continuous output of the electrical machine can be increased.
- the electrical machine can be used, for example, as an electrical traction machine for an electrically operated motor vehicle.
- the electrical machine is designed in particular as a current-excited synchronous machine (SSM) or an asynchronous machine (ASM) and can have a stationary stator and a rotor that is movably mounted, in particular rotatably, with respect to the stator.
- SSM current-excited synchronous machine
- ASM asynchronous machine
- the rotor typically has a rotor iron arranged on a rotor shaft, which can be formed, for example, by a rotor laminated core made of axially stacked laminations.
- the rotor has electrically conductive windings, which are designed to generate or excite a magnetic flux for conducting current.
- a winding in a current-excited synchronous machine can be designed as an excitation coil that can be energized.
- the excitation coil can, for example, comprise rod-shaped conductors or shaped rods, which are arranged in grooves in the rotor iron or on its circumferential surface. are arranged or the coil may comprise winding wires which are wound around poles of the rotor iron.
- the rotor shaft can be designed to allow fluid to flow through and a cooling medium to flow through.
- the cooling medium can be taken from a coolant circuit or a lubricant circuit, for example, and introduced into the rotor shaft by means of a hollow lance.
- the rotor shaft can have at least one outlet or outlet opening designed to deliver coolant from the hollow rotor shaft to an end face of the rotor and/or an end element arranged there. Distribution of this fluid or cooling medium to the end face(s) or the end element(s) can occur or be promoted by centrifugal forces prevailing during rotor operation. This can enable an even distribution of cooling fluid on the end face of the rotor, which in turn can be used to dissipate heat from the end face.
- the at least one heat exchange element is arranged on a slot lining element arranged between two windings of the rotor.
- a slot lining element is designed in particular as a sealing component for the potting material of the rotor and/or can be, for example, a plastic element which is arranged or can be arranged between two adjacent windings for insulation and/or spacing between them. Because the heat exchange element is arranged on such a slot lining element, the heat exchange element can be arranged in a simple manner between the two adjacent windings or in the space formed by them, in order to enable sufficient spacing of the heat exchange element from the windings and to be able to ensure electrical insulation of the heat exchange element from the windings.
- the heat exchange element is molded onto the groove lining element.
- the heat exchange element can be molded onto the groove lining element in particular by means of an injection molding process, an injection molding process or a casting process. connected or the slot lining element can be injection molded or cast onto the heat exchange element, which has been provided in particular beforehand. This makes it possible to provide a combination of two rotor components, whereby the heat exchange element can be placed between the windings in a simple manner by means of the slot lining element in order to reduce assembly time.
- the heat exchange element can have at least one profile in order to enable or promote a positive connection between the heat exchange element and the slot lining element.
- the invention is based, among other things, on the idea of avoiding overheating or exceeding a predetermined maximum temperature limit value in particular by providing at least one heat exchange element which is designed to dissipate (waste) heat which arises during operation of the rotor or the windings from the windings, which are arranged in particular adjacent to the heat exchange element, and to direct it to at least one end face of the rotor as a heat sink.
- a heat exchange element which is designed for use in an electrical machine described herein.
- the heat exchange element is in particular solid and can be rod-shaped and/or translaterally invariant, or have geometric modifications, such as at least one thickening and/or tapering and/or a wave-shaped or meandering course, in particular in its longitudinal extension.
- the heat exchange element can, for example, have at least one profiling or profile geometry and/or have a thermally conductive material or be made of such a material in order to enable favorable heat transfer or transport.
- the heat exchange element can have a high thermal conductivity so that a temperature distribution in the rotor can be homogenized and/or local hotspots can be avoided.
- the thermal connection created by the heat exchange element between the winding and at least one end face of the rotor allows heat generated during operation to be dissipated and removed from the rotor system. This allows the core temperature of the rotor or the electrical machine to be reduced and thus the achievable continuous torque of the electrical machine to be increased.
- the at least one heat exchange element is connected to at least one end element of the rotor in a heat-conducting manner.
- the rotor has an at least substantially disk-shaped end element on each of its end faces, which can rest on the winding heads of the rotor windings and/or be thermally connected to them.
- a cooling medium can flow over one or both end faces or end elements of the rotor in order to dissipate heat from the end faces or end elements.
- the cooling medium can be taken from a coolant circuit or a lubricant circuit, for example, in order to enable a structurally or manufacturing-technically simple but effective heat dissipation from the rotor end faces into the coolant circuit.
- the at least one heat exchange element is accommodated in sections in the front element.
- the front element can have at least one recess or bore in which the at least one heat exchange element can be accommodated in sections, in particular in a form-fitting manner, in order to promote heat transfer between the heat exchange element and the front element.
- one or both end regions of the heat exchange element are accommodated in the front element so that the heat exchange element does not protrude beyond the front element, in order to avoid in particular coolant-related eddy current losses during rotor rotation.
- the at least one heat exchange element is flush with an outer surface of the front element.
- End faces of the heat exchange element are designed to be adapted to a geometry of the end element in order to form a surface of the end element that can be flowed over as homogeneously as possible and thus promote heat removal by means of the coolant.
- heat transfer from waste heat to the coolant can take place directly at the end faces of the heat exchange element.
- this can provide a surface, in particular a uniform one, for the end element, which can enable a uniform liquid flow for the coolant over the surface of the end element in order to enable homogeneous heat removal.
- the at least one heat exchange element extends between two end elements of the electrical machine. This allows heat to be transported away from the rotor windings to the end faces or end elements evenly in the axial direction. Since hot spots typically occur in an axial center region of the windings or the rotor, efficient heat dissipation in the direction of both end faces of the rotor can thus be made possible in order to enable a reduction in the internal temperature of the rotor and thus increase the service life of the rotor.
- the at least one heat exchange element is cast together with the slot lining element in a rotor of the electric machine.
- the at least one heat exchange element is placed between two adjacent rotor windings, in particular by means of the slot lining element, or such a slot lining element with heat exchange element is arranged in particular in each intermediate space between adjacent rotor windings, before the rotor or the rotor iron is cast, in particular by means of a plastic or casting material.
- the casting material can enable permanent electrical insulation of the heat exchange element from the electrically conductive components of the rotor.
- the heat exchange element can be arranged as such or without a slot lining element in the intermediate space and cast there.
- the heat exchange element is arranged at a uniform distance from the adjacent windings by means of the slot lining element, in particular over its entire axial extent. This makes it possible to dissipate heat from both adjacent windings in a particularly axially uniform manner and also to ensure that the heat exchange element is sufficiently spaced from both windings in order to ensure electrical insulation of the heat exchange element.
- the heat exchange element comprises aluminum and/or another suitable material with high thermal conductivity.
- the at least one heat exchange element can in particular comprise or be made of a material that provides good thermal conduction properties in order to enable heat transfer from a particularly axially central region to the front-side cooling surfaces or front elements in order to reduce the core temperature of the rotor.
- a motor vehicle with at least one electrical machine described herein is proposed.
- the described embodiments and advantages apply accordingly to a motor vehicle having such an electrical machine.
- Fig. 1 shows a view of an electrical machine according to an exemplary embodiment of the invention in a schematic sectional view
- Fig. 2 shows a section of an electrical machine according to an exemplary embodiment of the invention in a three-dimensional schematic partial view.
- Fig. 1 shows a representation of an electric machine 50 according to an exemplary embodiment in a section along an axis of rotation 51 of the electric machine 50 in a schematic view.
- the electric machine 50 has a rotor 10 that is rotatably mounted relative to a stator 40 (shown only symbolically), the rotor 10 having a rotor shaft 11 through which fluid flows and a rotor iron 12 that is arranged in a rotationally fixed manner around the rotor shaft 11.
- An energizable winding 13, here in the form of an excitation coil, is shown on the rotor iron 12, with a plurality of windings 13 being arranged evenly spaced from one another in a circumferential direction of the rotor 10.
- a front element 15 is arranged on each of the front sides 14 of the rotor 10, which closes off a rotor interior from an interior 17 of the electric machine 10.
- At least one heat exchange element 16 is arranged, which is designed to conduct heat generated during operation of the electrical machine 10, in particular in the windings 13, to at least one end face 14 of the rotor 10.
- the heat exchange element 16 is arranged on a slot lining element 18 arranged in the gap.
- the heat exchange element 16 extends between the two end faces 15 of the rotor 10 and is connected to the end faces 15 in a heat-conducting manner, in particular by means of a positive connection.
- the heat exchange element 16 is accommodated in sections in the end face element 15 at one of its end face areas and is flush with an outer surface of the end face element 15 facing the interior 17 of the electric machine 50. This makes it possible to reduce eddy current losses on the outer surface of the rotor 10 or the end face element 15.
- FIG. 2 a partial view of the inventive electrical machine 50 of Fig. 1 or its rotor 10 is shown in a three-dimensional schematic sectional view. Shown is a section of the rotor iron 12 of the rotor 10 of the electrical machine 50 with windings 13a and 13b arranged thereon.
- a slot lining element 18 is arranged in the space formed between the windings 13a and 13b, which can serve as a sealing component for the casting material of the rotor 10.
- the heat exchange element 16 is molded onto this slot lining element 18, or the heat exchange element 16 is at least partially surrounded by the slot lining element 18. This can be achieved, for example, by overmolding or casting the heat exchange element 16 with the geometry of the slot lining element 18.
- the heat exchange element 16 is essentially rod-shaped and in the embodiment shown has profiles 21 on opposite sides, which serve to enable a connection between the heat exchange element 16 and the groove lining element 18 which at least partially surrounds it.
- the groove lining element 18 is attached to the Heat exchange element 16 is arranged in particular on a radially outer and inner side with respect to the rotor 10, whereby areas of the heat exchange element 16 which face the windings 13 remain free in order to promote heat transfer between the windings 13 and the heat exchange element 16.
- the at least one heat exchange element 16 is cast together with the slot lining element 18 in the rotor of the electric machine or is connected in particular permanently to the rotor 10 or rotor iron 12 by means of a casting material (not shown here), whereby an electrical insulation of the heat exchange element 16 from electrically conductive components of the rotor 10 can be made possible.
- the slot lining element 18 has two engagement wings 19 on its radially outer end, by means of which it can be positioned on the rotor iron 12.
- a central region 20 of the slot lining element 18, on which the heat exchange element 16 is arranged can be arranged at a uniform distance from the adjacent windings 13a and 13b.
- the uniform spacing of the heat exchange element 16 from the windings 13a, 13b, in particular over the axial extent of the heat exchange element 16, enables a uniform removal of heat from the windings 13 to the end faces 14 or the end elements 15.
- a core temperature of the rotor 10 can be reduced, whereby a continuous torque to be achieved by the electrical machine 50 can be increased.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480005111.3A CN120303860A (zh) | 2023-01-17 | 2024-01-10 | 电机 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023101007.7A DE102023101007A1 (de) | 2023-01-17 | 2023-01-17 | Elektrische Maschine |
| DE102023101007.7 | 2023-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024153501A1 true WO2024153501A1 (de) | 2024-07-25 |
Family
ID=89618864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/050418 Ceased WO2024153501A1 (de) | 2023-01-17 | 2024-01-10 | Elektrische maschine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN120303860A (de) |
| DE (1) | DE102023101007A1 (de) |
| WO (1) | WO2024153501A1 (de) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59179454U (ja) * | 1983-05-16 | 1984-11-30 | 西芝電機株式会社 | 突極同期機の回転子 |
| US5140204A (en) * | 1991-07-05 | 1992-08-18 | Westinghouse Electric Corp. | Heat pipes for cooling pole windings of salient pole machines |
| US20050231058A1 (en) * | 2003-01-13 | 2005-10-20 | Down Edward M | Generator with composite rotor coil retention components |
| US20120007453A1 (en) * | 2009-03-05 | 2012-01-12 | Heinz Leiber | Dual-rotor motor |
| US20150155753A1 (en) * | 2012-09-06 | 2015-06-04 | Toyota Jidosha Kabushiki Kaisha | Rotor for rotating electrical device |
| US20160043613A1 (en) * | 2014-08-11 | 2016-02-11 | Hamilton Sundstrand Corporation | Thermally conductive rotor wedges |
| US20210328471A1 (en) * | 2020-04-20 | 2021-10-21 | Audi Ag | Electric machine and motor vehicle |
| US20220216773A1 (en) * | 2021-01-05 | 2022-07-07 | Hamilton Sundstrand Corporation | Composites and methods of making composite materials |
| DE102021111321A1 (de) * | 2021-05-03 | 2022-11-03 | Bayerische Motoren Werke Aktiengesellschaft | Rotoreinrichtung für eine elektrische Maschine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007060011A1 (de) * | 2007-12-13 | 2009-07-02 | Siemens Ag | Sekundärteil einer permanenterregten elektrischen Maschine und Verfahren zu dessen Herstellung |
| US8749103B2 (en) * | 2010-09-15 | 2014-06-10 | Remy Technologies, L.L.C. | Permanent magnet rotor for electric machine |
| KR101836297B1 (ko) * | 2016-10-17 | 2018-03-08 | 현대자동차 주식회사 | 구동모터 |
| DE102016222847B4 (de) * | 2016-11-21 | 2018-12-06 | Audi Ag | Elektrische Maschine |
| DE102018202945A1 (de) * | 2018-02-27 | 2019-08-29 | Bayerische Motoren Werke Aktiengesellschaft | Elektrische Maschine und Fahrzeug mit einer solchen |
-
2023
- 2023-01-17 DE DE102023101007.7A patent/DE102023101007A1/de active Pending
-
2024
- 2024-01-10 WO PCT/EP2024/050418 patent/WO2024153501A1/de not_active Ceased
- 2024-01-10 CN CN202480005111.3A patent/CN120303860A/zh active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59179454U (ja) * | 1983-05-16 | 1984-11-30 | 西芝電機株式会社 | 突極同期機の回転子 |
| US5140204A (en) * | 1991-07-05 | 1992-08-18 | Westinghouse Electric Corp. | Heat pipes for cooling pole windings of salient pole machines |
| US20050231058A1 (en) * | 2003-01-13 | 2005-10-20 | Down Edward M | Generator with composite rotor coil retention components |
| US20120007453A1 (en) * | 2009-03-05 | 2012-01-12 | Heinz Leiber | Dual-rotor motor |
| US20150155753A1 (en) * | 2012-09-06 | 2015-06-04 | Toyota Jidosha Kabushiki Kaisha | Rotor for rotating electrical device |
| US20160043613A1 (en) * | 2014-08-11 | 2016-02-11 | Hamilton Sundstrand Corporation | Thermally conductive rotor wedges |
| US20210328471A1 (en) * | 2020-04-20 | 2021-10-21 | Audi Ag | Electric machine and motor vehicle |
| US20220216773A1 (en) * | 2021-01-05 | 2022-07-07 | Hamilton Sundstrand Corporation | Composites and methods of making composite materials |
| DE102021111321A1 (de) * | 2021-05-03 | 2022-11-03 | Bayerische Motoren Werke Aktiengesellschaft | Rotoreinrichtung für eine elektrische Maschine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023101007A1 (de) | 2024-07-18 |
| CN120303860A (zh) | 2025-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102011082353B4 (de) | Stator für einen Elektromotor | |
| EP3476024B1 (de) | Stator für eine elektrische rotierende maschine | |
| DE102016200186B4 (de) | Elektrische Maschine | |
| EP4320709A1 (de) | Stator einer elektrischen axialflussmaschine und axialflussmaschine | |
| DE102014018223A1 (de) | Elektrische Maschine, insbesondere Asynchronmaschine | |
| DE102020114683A1 (de) | Hohlwellenwicklung mit integrierter Kühlkanalgeometrie für elektrische Maschinen | |
| WO2019110275A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
| WO2023217471A1 (de) | Rotor für eine elektrische traktionsmaschine eines kraftfahrzeugs sowie elektrische traktionsmaschine | |
| DE102017215835A1 (de) | Fluidgekühlte elektrische Maschine | |
| EP4320708A1 (de) | Stator einer elektrischen axialflussmaschine und axialflussmaschine | |
| DE102015215667A1 (de) | Flüssigkeitskühlung einer elektrischen Maschine | |
| DE102010003686A1 (de) | Elektrische Maschine mit Wickelkopf | |
| EP3652839B1 (de) | Stator für eine elektrische rotierende maschine | |
| WO2023117389A1 (de) | Strömungselement und elektrische maschine mit strömungselement | |
| WO2019101397A1 (de) | Kühlkappe für einen stator einer elektrischen maschine eines kraftfahrzeugs, stator sowie kraftfahrzeug | |
| DE102023101007A1 (de) | Elektrische Maschine | |
| DE102023105537B4 (de) | Rotoranordnung | |
| DE102013104117A1 (de) | Anordnung zur Kühlung einer elektrischen Maschine | |
| DE102021133858A1 (de) | Rotor für eine elektrische Maschine | |
| DE102021127499A1 (de) | Rotor für eine elektrische Maschine | |
| WO2024046664A1 (de) | Elektrische maschine | |
| DE102023121222B4 (de) | Rotoranordnung | |
| WO2025008220A1 (de) | Elektrische maschine | |
| DE102024107304A1 (de) | Elektrische Maschine | |
| DE102024124900A1 (de) | Elektrische Maschine mit einem Doppelrotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24700273 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: CN2024800051113 Country of ref document: CN Ref document number: 202480005111.3 Country of ref document: CN |
|
| WWP | Wipo information: published in national office |
Ref document number: 202480005111.3 Country of ref document: CN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 24700273 Country of ref document: EP Kind code of ref document: A1 |