EP3857683A1 - Elektromotor mit wärmeableitung für das motorwellenlager - Google Patents
Elektromotor mit wärmeableitung für das motorwellenlagerInfo
- Publication number
- EP3857683A1 EP3857683A1 EP19798025.3A EP19798025A EP3857683A1 EP 3857683 A1 EP3857683 A1 EP 3857683A1 EP 19798025 A EP19798025 A EP 19798025A EP 3857683 A1 EP3857683 A1 EP 3857683A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ball bearing
- motor
- electric motor
- containment shell
- housing cover
- 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.)
- Pending
Links
- 230000017525 heat dissipation Effects 0.000 title description 9
- 238000004804 winding Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/02—Casings or enclosures characterised by the material thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/15—Mounting arrangements for bearing-shields or end plates
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- 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
- 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
- H02K9/227—Heat sinks
Definitions
- the invention relates to an electric motor in a compact design with heat dissipation for the motor shaft bearing.
- the object of the invention is therefore to provide improved heat dissipation for the ball bearing supporting the motor shaft in an electric motor.
- an electric motor with a motor housing which has a shaft section for receiving a motor shaft and a motor section for receiving motor electronics and motor windings.
- the shaft section and the motor section are separated from one another in a sealed manner by a split case arranged in the motor housing, a metallic ball bearing pot being arranged in the split pot, in which a ball bearing for mounting the motor shaft is fastened.
- the ball bearing pot adjoins with a gap between the gap on the housing cover, which forms part of the motor housing, with a gap in between, so that the
- Housing cover acts as a heat sink and a heat generated by the ball bearing during operation is dissipated to the housing cover and the external environment via the ball bearing pot and the containment shell.
- the containment can is used to separate the shaft section and the motor section and to prevent gas exchange between the crankcase and the electronics or motor windings.
- the containment shell with the ball bearing pot arranged therein leads to a structure in which the ball bearing must be packed in a very central manner and can dissipate little of its heat generated during operation.
- the heat is dissipated according to the invention by connecting the containment shell and ball bearing pot with the ball bearing accommodated therein to the housing cover of the motor housing.
- the gap between the housing cover 3 and the containment shell 7 has a gap dimension of zero.
- the housing cover is therefore directly against the containment can.
- the in turn in the can be sensitive ball bearing pot is thus also in direct connection to the housing cover, so that the heat is dissipated from the ball bearing pot through the can on the housing cover to the outside environment.
- the gap between the housing cover and the containment shell has a small gap dimension, which is up to a size of 1/20 of the maximum outer diameter of the ball bearing.
- the small gap hardly affects the heat dissipation from the ball bearing top to the housing cover, but enables a relative arrangement of the components without contact.
- the containment shell is formed in one piece by the motor housing around an axis of rotation of the motor shaft.
- the motor housing forms a circumferential outer wall, to which an axial wall adjoins on an axial side, into which the containment shell is sunk.
- the containment shell is preferably hollow cylindrical with sections of different diameters, with the ball bearing pot being arranged in the axially most protruding section into the motor housing.
- an embodiment is favorable in which the containment shell and the ball bearing pot are of identical shape in the section of the split case in which the ball bearing pot is arranged.
- the spherical pot and the containment shell determine the same outer contours.
- a thermal paste or a thermal adhesive is provided between the containment shell and the housing cover.
- the thermal paste preferably forms an intermediate layer and enables a thermal connection of the housing cover to the containment shell without the components touching. Vibrations of the individual components thus remain decoupled from one another.
- the bonded connection of the housing cover to the containment shell can also take place.
- the housing cover is releasably attached to the Motorge housing in one embodiment and is placed on an axial side of the rest of the motor housing.
- the housing cover thus forms the section of the motor housing which is indirectly connected to the ball bearing pot and thus the ball bearing via the containment shell.
- the containment shell is formed in one piece with the motor housing, the components of the electric motor can be mounted on the side axially opposite the containment shell, on which the housing cover is removably positioned.
- the solution offers with one
- Housing cover as a heat sink the large area for heat dissipation to the outside environment.
- the performance of heat dissipation is further improved in the electric motor in a variant in which the housing cover has a cooling element projecting axially in the direction of the outside, which locally increases the cooling surface of the housing cover.
- the housing cover has a cooling element projecting axially in the direction of the outside, which locally increases the cooling surface of the housing cover.
- Housing cover designed as a cooling element a plurality of cooling fins arranged distributed over the housing cover.
- the cooling fins can in particular be integrally formed on the housing cover or, alternatively, be integrally attached to it. It is also advantageous if several of the cooling fins, seen in axial projection, extend over the ball bearing pot, so that the locally occurring heat at the ball bearing pot is conducted particularly quickly and effectively to the outside environment.
- the heat dissipation is also favored by the fact that the housing cover is made of metal or thermally conductive plastic.
- the ball bearing cup forms a ball bearing seat into which the ball bearing is pressed.
- a variant of the electric motor is characterized in that the ball bearing pot has a free space between the ball bearing and the section of the motor housing that is connected to the external environment.
- the ball bearing can thus immediately transfer heat to the air in the free space. give and is not in direct contact with the axial surface of the Kugella gertopfes, which rests on the containment shell and the heat sink.
- the containment shell extends axially through the motor housing to the housing cover.
- the containment shell thus determines in the axial direction, i. H. along the axis of rotation of the motor shaft, a significant part of the motor housing located centrally around the axis of rotation.
- the gap pot preferably extends in the axial direction over 60-95%, more preferably over 70-95%, still further preferably over 80-90% of the total axial extent of the motor housing.
- motor housing and the containment shell are formed from plastic and the metallic ball bearing cup is extrusion-coated directly with the plastic.
- the windings enclose the containment shell in the circumferential direction.
- the windings are arranged axially spaced from the ball bearing.
- the heat development of the motor windings thus remains separate from that of the ball bearing.
- the motor electronics are arranged on a printed circuit board which has a central opening and a cooling element protruding from the housing cover extends through the central opening.
- the containment shell extends through the central opening.
- Figure 1 is a side sectional view through an electric motor of an embodiment. 2 shows a detailed view from FIG. 1
- an embodiment of an electric motor 1 according to the invention is shown in a side sectional view or detailed view.
- the electric motor 1 comprises the one-piece motor housing 2 with the
- Housing cover 3 which is axially attachable to the motor housing 2 and forms part of the motor housing in the fastened state.
- the motor housing 2 forms in one piece the can 7 which extends axially into the interior of the motor housing 2.
- the motor section Between the inner wall of the motor housing 2 and the outer jacket of the containment shell 7 is the motor section in which the motor windings 6 and the motor electronics 5 attached to the printed circuit board 14 are taken up.
- the containment shell 7 is delimited sealingly within the containment shell 7 of the shaft section in which the motor shaft 4 runs along its axis of rotation.
- the containment shell 7 extends in the axial direction essentially Lichen through the entire motor housing 2 to the housing cover 3rd
- the motor housing 2 with the can 7 is injection molded from plastic in an injection molding process around the ball bearing pot 8, so that the can 7 and the ball bearing pot 8 have the same shape or inner and outer contours and abut one another directly.
- the ball bearing cup 8 determines the bearing seat for the pressed-in ball bearing 9, in which the motor shaft 4 is mounted.
- the free space 13 is formed, into which the motor shaft 4 extends with its free end.
- a cooling element 11 protruding axially in the direction of the ball bearing cup 8 in the form of a cylinder made of solid material is integrally formed on the housing cover 3 around the axis of rotation. Axially between the cooling element 11 and the axial outer wall surface of the containment shell 7 is the gap 121 with a maximum gap of 1/20 of the outer diameter of the ball bearing.
- a layer of the thermal paste 10 is provided in the gap 121, which layer can also be replaced by thermal adhesive.
- the heat dissipation of the heat generated by the ball bearing 9 during operation takes place from the ball bearing 9 to the ball bearing pot 8, further to the containment shell 7 and in the axial direction via the thermal paste 10 to the cooling element 11 of the housing cover 3 of the motor housing 2 the heat is released to the outside environment.
- the motor housing and in particular its housing cover 3 thus function as a heat sink.
- the thermal paste 10 is dispensed and the cooling element 11 makes direct contact with the can 7.
- the gap 121 then has a gap dimension of zero.
- the can 7 is hollow cylindrical and divided into three axial sections, each with different inner diameters. In the area of the least
- the diameter is the free space 13, in the middle area the bearing seat with the ball bearing 9 and in the area of the largest inside diameter the motor windings 6 are arranged radially around the containment shell 7.
- the ball bearing 9 is thus free of overlap with respect to the motor windings 5 as seen in the axial direction.
- the circuit board 14 determines about the axis of rotation of the motor shaft 4, the central opening 15 through which extends axially from the housing cover 3 axially projecting cooling element 11 through to the containment shell 7.
- the area of the smallest diameter of the can 7 extends through the opening 15 or at least into the opening 15, so that the contact between the can 7 and the cooling element 11 at the level of the circuit board 14 or axially above the circuit board 14.
- the housing cover 3 be formed without a cooling element 11 and the containment shell 7 immediately or via the thermal paste 10 or the thermal adhesive to the axial Bring the inner wall of the housing cover 3 to the system.
- the housing cover 3 forms a plurality of cooling fins 111 arranged distributed over its surface facing the external environment, which are partly in the center, i.e. seen in axial projection over the ball bearing pot 8 he stretch. As a result, the heat accumulating in the area of the ball bearing cup 8 is conducted more quickly to the outside environment.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019102365.3A DE102019102365A1 (de) | 2019-01-30 | 2019-01-30 | Elektromotor mit Wärmeableitung für das Motorwellenlager |
PCT/EP2019/079556 WO2020156696A1 (de) | 2019-01-30 | 2019-10-29 | Elektromotor mit wärmeableitung für das motorwellenlager |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3857683A1 true EP3857683A1 (de) | 2021-08-04 |
Family
ID=68461763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19798025.3A Pending EP3857683A1 (de) | 2019-01-30 | 2019-10-29 | Elektromotor mit wärmeableitung für das motorwellenlager |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220094237A1 (de) |
EP (1) | EP3857683A1 (de) |
KR (1) | KR20210120985A (de) |
CN (1) | CN113169618A (de) |
DE (1) | DE102019102365A1 (de) |
WO (1) | WO2020156696A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20240037699A (ko) | 2022-09-15 | 2024-03-22 | 엘지전자 주식회사 | 팬 모터 |
KR20240047795A (ko) | 2022-10-05 | 2024-04-12 | 엘지전자 주식회사 | 팬 모터 |
KR20240080911A (ko) | 2022-11-30 | 2024-06-07 | 엘지전자 주식회사 | 팬 모터 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
YU33595B (en) * | 1970-05-22 | 1977-08-31 | Skf Ind Trading & Dev | Bearing support for electric machines |
DE3545665A1 (de) * | 1985-12-21 | 1987-07-02 | Kaercher Gmbh & Co Alfred | Fluessigkeitsgekuehlter elektromotor |
JP2646512B2 (ja) * | 1991-12-25 | 1997-08-27 | アスモ株式会社 | 小型モータの樹脂注入軸受 |
DE19816766A1 (de) * | 1998-01-20 | 1999-07-22 | Itt Mfg Enterprises Inc | Drucksteuergerät |
FR2789529B1 (fr) * | 1999-02-05 | 2001-06-08 | Valeo Systemes Dessuyage | Perfectionnements aux moteurs electriques a courant continu, notamment pour actionneur de vehicule automobile |
DE19949755A1 (de) * | 1999-10-15 | 2001-04-26 | Bosch Gmbh Robert | Handwerkzeugmaschine |
EP1427089A3 (de) * | 2000-01-12 | 2004-09-15 | NeoDrive LLC | Aussenläufermotor |
DE102010029769A1 (de) * | 2010-06-08 | 2011-12-08 | Robert Bosch Gmbh | Elektromotor |
US10033242B2 (en) * | 2013-02-01 | 2018-07-24 | Regal Beloit America, Inc. | Electrical machines and methods of assembling the same |
JP6160576B2 (ja) * | 2014-07-31 | 2017-07-12 | 株式会社デンソー | 駆動装置、および、これを用いた電動パワーステアリング装置 |
DE102015218620A1 (de) * | 2015-09-28 | 2017-03-30 | Robert Bosch Gmbh | Gehäuse für eine elektrische Maschine |
DE202018105137U1 (de) * | 2018-09-07 | 2018-09-17 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Elektromotor mit einer Wärmeableitung für das Motorwellenlager |
-
2019
- 2019-01-30 DE DE102019102365.3A patent/DE102019102365A1/de active Pending
- 2019-10-29 US US17/423,456 patent/US20220094237A1/en not_active Abandoned
- 2019-10-29 WO PCT/EP2019/079556 patent/WO2020156696A1/de unknown
- 2019-10-29 CN CN201980079320.1A patent/CN113169618A/zh active Pending
- 2019-10-29 KR KR1020217015527A patent/KR20210120985A/ko not_active Application Discontinuation
- 2019-10-29 EP EP19798025.3A patent/EP3857683A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102019102365A1 (de) | 2020-07-30 |
CN113169618A (zh) | 2021-07-23 |
KR20210120985A (ko) | 2021-10-07 |
US20220094237A1 (en) | 2022-03-24 |
WO2020156696A1 (de) | 2020-08-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3857683A1 (de) | Elektromotor mit wärmeableitung für das motorwellenlager | |
DE202018105137U1 (de) | Elektromotor mit einer Wärmeableitung für das Motorwellenlager | |
EP0906652B1 (de) | Elektromotor | |
EP2398132B1 (de) | Pumpenaggregat | |
DE102005041136B4 (de) | Umrichtermotor und Verfahren | |
DE20204729U1 (de) | Gebläse mit eingebauten Selbstkühleigenschaften | |
DE102011100980A1 (de) | Elektromotor | |
DE102005032968A1 (de) | Umrichtermotor | |
WO2013092917A1 (de) | Elektromotor | |
DE102015105377A1 (de) | Elektromotor mit verbesserter Kühlung | |
EP3123039B1 (de) | Kühlhülse für ein lager und lager mit kühlhülse | |
DE102014211672A1 (de) | Elektrische Maschine | |
EP2607708B1 (de) | Elektromotor | |
EP3776816B1 (de) | Elektromotor mit einer wärmeableitung für das motorwellenlager | |
DE20121314U1 (de) | Kühler für den Motor eines Luftkompressors | |
DE102005032970B3 (de) | Umrichtermotor | |
EP3871317A1 (de) | Elektromotor zum antrieb von arbeitsmaschinen mit medientrennung | |
DE202015105163U1 (de) | Kompakte Kühlvorrichtung mit auf einem Kühlkörper aufgeklebtem Radiallüfter | |
DE202019100551U1 (de) | Elektromotor mit Wärmeableitung für das Motorwellenlager | |
WO2020193607A1 (de) | Lüftergehäuse mit integrierter motorelektronik | |
DE29914614U1 (de) | Lagerstütze | |
DE202019100555U1 (de) | Elektromotor zum Antrieb von Arbeitsmaschinen mit Medientrennung | |
EP3593078B1 (de) | Kühlvorrichtung | |
DE102015000637A1 (de) | Lüfter mit Lüftergehäuse | |
DE202015103889U1 (de) | Ventilator mit Außenelektronik |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210428 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20240416 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HENGST SE |