EP4140017A1 - Stator for a housing-free dynamoelectric rotary machine - Google Patents
Stator for a housing-free dynamoelectric rotary machineInfo
- Publication number
- EP4140017A1 EP4140017A1 EP21718050.4A EP21718050A EP4140017A1 EP 4140017 A1 EP4140017 A1 EP 4140017A1 EP 21718050 A EP21718050 A EP 21718050A EP 4140017 A1 EP4140017 A1 EP 4140017A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- rotary machine
- slot wedge
- dynamo
- housingless
- 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
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 16
- 230000008719 thickening Effects 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 108090000623 proteins and genes Proteins 0.000 claims 1
- 238000003475 lamination Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
Definitions
- the invention relates to a stator for a caseless dy namo-electric rotary machine and a caseless dynamo-electric rotary machine.
- the patent specification DE 2037 769 A1 discloses a surface-cooled, housing-less electric motor with end shields that are supported on the laminated stator core consisting of rectangular laminations, with the stator laminations partially or on the entire outer circumference having teeth shaped in such a way that they can be punched from strip material without a grid.
- US 2006/284511 A1 discloses a motor comprising a stator core which is formed from a plurality of stator laminations and which is at least partially a peripheral surface of the motor.
- Each stator liner has a plurality of ribs that extend radially outward. When assembled, the ribs of adjacent laminations together form larger ribs that extend the length of the stator core.
- These fins improve engine cooling by improving engine heat dissipation.
- a central aspect of new environmental guidelines concerns the repairability of products. Electric motors are also affected here.
- the tasks of a housing of an electric motor include, for. B. a cooling of the electric motor.
- a damaged housing is often a reason to dispose of the electric motor, as repairs can sometimes be difficult.
- the object of the invention is to improve an electric motor in terms of repairability.
- a dynamoelectric rotary machine without a housing comprising a stator, the stator having a material layer structure, the material layer structure having a plurality of material layers, the material layers being lined up along an axis of rotation, the material layer structure has a plurality of thickened portions and a plurality of grooves, with one groove being arranged between two thickened portions, with at least one groove being designed in such a way that at least one slot wedge can be accommodated, with at least one thickened portion being designed in such a way that the slot wedge can be fixed, an end element being arranged on at least one axial end of the stator, the end element being connected to the stator by means of at least one connecting element, at least one slot wedge being arranged in at least one slot of the stator, the connecting element having at least one slot wedge ver is bound.
- the material layer structure advantageously has the function of a laminated core and is advantageously designed as a laminated core (also: stator core).
- the material layer has the advantageous Function of a, preferably stamped, single sheet and is advantageously designed as a single sheet.
- the thickenings are at least partially designed as cooling fins.
- This increase in surface area allows heat to be dissipated in a simple manner.
- At least one groove is designed in such a way that at least one slot wedge can be accommodated, with at least one thickened portion being designed in such a way that the slot wedge can be fixed.
- a first thickened portion at a radial end of the first thickened portion has a projection directed in the direction of rotation, with a second thickened portion at a radial end of the second thickened portion having a projection directed counter to the direction of rotation.
- the material layers are materially connected, in particular by means of an adhesive.
- the individual laminations are advantageously linked to one another to form a stator iron packet during a stamping process or after stamping. This works particularly well by gluing the individual sheets over the entire surface.
- Full-surface bonding also offers the advantage that the individual sheets are sealed to one another. In this way, good protection against contact, foreign bodies and water is achieved.
- the stator is coated with a coating.
- the coating advantageously ensures protection against corrosion, in particular on an outer circumference of the stator.
- the coating is suitable for forming an insulating layer between the winding and the material layer, in particular the stator lamination, in an inner region of the slots.
- a galvanic coating a coating by thermal flame spraying or cold gas spraying as well as a coating by a dipping process (e.g. galvanizing).
- only one type of coating is used, which is suitable for the outer area of the stator as well as for the inner area.
- a resin-based coating that is applied, for example, by painting or dipping is particularly well suited for this purpose.
- Electrostatic powder coating e.g. with subsequent thermal treatment is another option.
- the coating advantageously has a thickness of between 20 ⁇ m and 70 ⁇ m, in particular between 30 ⁇ m and 60 ⁇ m.
- a coating is conceivable that has lacquer and/or resin. These can be based on polyester (unsaturated) and/or epoxy. Silicones are also conceivable.
- stator z. B. Due to the coating of the stator z. B. protected against corrosion and thus rusting. This succeeds z. B. by immersion in an anti-rust substrate and / or by painting with the anti-rust substrate.
- electrical insulation can be generated by the coating. This is done, for example, by fillers in the coating. Ceramic fillers are advantageously used here to improve resistance to abrasion, preferably outdoors. Ceramic fillers can also be used to increase insulating ability and heat conduction, particularly in a slot area for the winding.
- Thermally conductive particles e.g. quartz sand, or particles resistant to partial discharges, especially those based on silicon, are also suitable as fillers.
- the housingless dynamoelectric rotary machine can also be referred to as a one-piece stator-housing unit, since a function of the housing is realized in particular on an outer circumference of the stator.
- a conventional housing is dispensed with.
- the housing is integrated into the stator, in which special contours and ribs are punched into the individual sheet metal during the stamping process.
- one end element each is arranged at a front axial end of the stator and at a rear axial end of the stator.
- the end element is designed as a bearing plate.
- the end shield advantageously has a receptacle for a bearing for supporting a shaft of the rotor.
- the caseless dynamoelectric rotary machine has an end shield on an A side and an end shield on a B side.
- the end element has thickenings, in particular designed as cooling ribs.
- Winding heads which are preferably positioned axially below the end element, can thus dissipate their heat loss better. In this way, efficiency can be increased.
- the cooling ribs of the stator and the cooling ribs of the end element are advantageously arranged in alignment.
- the connecting element is a screw element.
- the screw element is preferably a clamping screw.
- At least one slot wedge is arranged in at least one slot of the stator.
- Exactly one slot wedge is advantageously arranged in a slot. However, there can also be several slot wedges per slot.
- the connecting element is connected to at least one slot wedge.
- stator is connected to the end element.
- the end element is advantageously connected to the stator at at least two points. This is advantageously achieved by means of two slot wedges, which are arranged at a distance from an outer circumference of the stator.
- At least one base is connected to at least one slot wedge.
- the stator is connected to the base.
- At least two feet are advantageously connected to the stator. This is advantageously achieved by means of two slot wedges, which are arranged at a distance from an outer circumference of the stator. These are advantageously located on an underside of the stator.
- the feet can z. However, it can also be arranged laterally, for example, in the case of stators to be mounted on a wall.
- a recording of components such as end shields and feet is thus realized by introduced slot wedges.
- the end element has a connection box for supplying electrical energy.
- connection box advantageously has a base and is designed for connection to a terminal box.
- the slot wedge is arranged at a distance from the front axial end of the stator and/or from the rear axial end of the stator.
- a groove base that is free in this way enables the end elements, in particular end shields, to be centered. No further processing is required
- the groove is preferably designed as a keyway.
- the invention offers the advantage that recycling is simplified because there is no housing.
- a winding can e.g. B. removed from the stator core in case of damage and introduced a new winding. It is therefore easy to reuse the stator pack with the integrated housing.
- the invention also offers the advantage that it is not necessary to process the centerings. Slot bases in the stator are used for this. An accuracy of coaxiality is very high due to the punching of the individual sheets. As there is no housing, an annular surface of the wall can also be used on the active part.
- machine can be as short as possible with different, output-related package lengths within one axle height.
- a machine length is not dependent on a housing.
- the end shield is not attached to a housing surface, but directly to the material layer structure, in particular to the laminated core.
- stator it is possible by the invention to increase an outer diameter of the stator.
- a larger stator outside diameter makes it possible to make a rotor outside diameter just as larger and thus to achieve higher performance and higher efficiency.
- the invention allows construction of a compact and efficient motor.
- the invention is suitable for all areas of application of dynamo-electric rotary machines, especially for industrial applications such as pumps, fans, compressor drives and for conveyor systems.
- 3 shows a laminated core
- 4 shows the laminated core with four slot wedge receiving elements
- the machine 1 shows a dynamoelectric rotary machine 1 without a housing.
- the machine 1 comprises a stator 2, a rotor 3 and a shaft 4.
- the stator 2 comprises a material layer structure, in particular a laminated core 8 (also: Statorpa ket).
- a laminated core 8 also: Statorpa ket.
- further thickenings in the form of a slot wedge receiving element 10 are formed on the outer circumference. Lying in between a groove 5 is executed.
- the figure also shows a plurality of slot wedges 12 and a plurality of feet 13.
- An end shield 14 is arranged at a front axial end of the stator 50, and another end shield is preferably also formed at a rear axial end 51 (not shown).
- the figure also shows that the end shield 14 has cooling fins 141 .
- the end shield 14 also includes an attachment terminal box 21.
- the end shield 14 also has a groove wedge receiving element 142. Possible types of attachment of the bearing plate 14 and the feet 13 are explained in more detail in FIGS. 5 and 6, respectively.
- the enveloping dimensions are no larger than for a machine with a housing.
- the invention simplifies recycling and processing of engine components.
- the individual sheet 6 has a specific contour.
- the contour has indentations and bulges on its outer circumference, which are used to form cooling ribs 9 and grooves 7 , as well as further indentations and further bulges, which are used to form the slot wedge receiving elements 10 and grooves 5 .
- the individual sheet 6 is preferably produced by stamping from, preferably rolled, large sheet.
- FIG. 3 shows a plurality of individual sheets 6 which are lined up to form a laminated core 8 .
- the individual sheets are preferably glued together over the entire surface.
- the cooling fins 9 are advantageously provided by stamping Herge. Cooling is thus integrated in the stator 2. The heat transfer from the stator 2 to the cooling fins 9 is therefore optimal.
- FIG. 4 shows the laminated core 8, having four slot wedge receiving elements 10.
- a slot wedge 12 is arranged in each slot wedge receiving element 10 in the figure.
- only one slot wedge 12 is arranged per slot wedge receiving element 10 .
- meh eral slot wedges 12 in a slot wedge receiving element 10 .
- the slot wedge 12 has, as in the Figure shown, at least one bore 121, 122, 123 or on other deepenings. This is used, for example, to attach other components.
- a bore 121 is advantageously formed at one axial end, preferably at both axial ends.
- the figure also shows two bores 122, 123 at the radial end of the slot wedge 12.
- the slot wedge 12 is arranged at a distance from the front axial end of the stator 50 (see FIG. 1) and/or from the rear axial end of the stator 51 .
- a groove base surface 17 that is free in this way enables the end elements, in particular special end shields 14, to be centered. No further processing is required for centering.
- FIG. 5 shows an attachment of an end element, embodied as a bearing plate 14, on the stator 2.
- a slot wedge 12 is arranged in the slot wedge receiving element 10.
- a loading of the end shields 14 by slot wedges 12 is advantageous because the machine 1 can thus be built particularly compact.
- the slot wedges 12 are advantageously shorter than the stator core 8 .
- This enables axial bracing of the end shields 14 on the end faces of the stator core 8.
- the machine 1 is therefore suitable for protection classes IP54 and IP55.
- a foamed seal can also be introduced into the gap 22 .
- 6 shows the machine 1, having feet 13.
- the feet 13 are also fastened by the slot wedges 12. Radial threads in the slot wedge 12 are advantageous for fastening the foot 13 or for receiving a lifting eyelet.
- the machine 1 is safe.
- a foot is advantageously attached to the slot wedges 12.
- the feet 13 are advantageously guided in the slot 5. This means that an embodiment with and without a foot can be easily implemented or retrofitted. Processing is not required due to the accuracy of the stamping process lich.
- the end shield 14 has a plurality of cooling ribs 141 and four slot wedge receiving elements 142.
- the end shield 14 comprises, preferably on an upper side of the end shield 14, a terminal box base 21.
- a sealing of a connection point between the bearing shield 14 and laminated core 8 succeeds, for example by means of an O-ring, which is arranged, for example, on an end face of the laminated core 8.
- FIG. 8 and FIG. 9 show a section of the end shield 14 and a fastening cam 15 from different perspectives.
- the fastening cam 15 is designed, in particular by a notch 18, in such a way that water drainage on the fastening cam 15 in the end shield 14 is optimal.
- the mounting cam 15 protrudes beyond an axial end of the bearing shield 14 addition. When the bearing plate 14 and the stator 2 are joined together, the fastening cam 15 advantageously protrudes into the groove 5 or engages in the groove 5 . This enables centering.
- the 10 shows the machine 1, having a hood 23.
- the machine 1 is preferably self-ventilated and advantageously has a fan (not shown).
- the hood 23 serves to shield the fan.
- 11 shows a snap connection 20.
- the snap connection 20 enables the hood 23 to be attached. Other types of connection are also conceivable.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20186687.8A EP3944465A1 (en) | 2020-07-20 | 2020-07-20 | Stator for a housing-free dynamoelectric rotary machine |
PCT/EP2021/058574 WO2022017653A1 (en) | 2020-07-20 | 2021-04-01 | Stator for a housing-free dynamoelectric rotary machine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4140017A1 true EP4140017A1 (en) | 2023-03-01 |
Family
ID=71728616
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20186687.8A Withdrawn EP3944465A1 (en) | 2020-07-20 | 2020-07-20 | Stator for a housing-free dynamoelectric rotary machine |
EP21718050.4A Pending EP4140017A1 (en) | 2020-07-20 | 2021-04-01 | Stator for a housing-free dynamoelectric rotary machine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20186687.8A Withdrawn EP3944465A1 (en) | 2020-07-20 | 2020-07-20 | Stator for a housing-free dynamoelectric rotary machine |
Country Status (4)
Country | Link |
---|---|
US (1) | US12003138B2 (en) |
EP (2) | EP3944465A1 (en) |
CN (1) | CN116210136A (en) |
WO (1) | WO2022017653A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4307525A1 (en) | 2022-07-13 | 2024-01-17 | Siemens Aktiengesellschaft | Housing-less dynamoelectric rotary machine with connected elements |
EP4307534A1 (en) * | 2022-07-14 | 2024-01-17 | Siemens Aktiengesellschaft | Assembly of a stator with a partially polymeric housing for a dynamoelectric machine and manufacturing method of the same or its use |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2037769C3 (en) * | 1970-07-30 | 1974-08-29 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Stator core with cooling fins for a surface-cooled, housing-less electric motor |
DE7813179U1 (en) * | 1978-04-29 | 1978-09-14 | G. Bauknecht Gmbh, Elektrotechnische Fabriken, 7000 Stuttgart | ENCLOSED ELECTRIC MACHINE |
EP0453618B1 (en) * | 1990-04-27 | 1995-02-08 | Sumitomo Heavy Industries, Ltd | Lifting structure for dynamic electric machine |
ITVI20010247A1 (en) * | 2001-11-26 | 2003-05-26 | Sincro Srl | STATOR FIXING SYSTEM TO THE CASE IN A ROTARY MACHINE |
US20060284511A1 (en) * | 2005-06-21 | 2006-12-21 | Evon Steve T | Enhanced electrical machine cooling |
ITVI20110121A1 (en) * | 2011-05-12 | 2012-11-13 | Lino Soga | LAMIERINO FOR STATOR PACKAGE AND STATOR PACK INCLUDING THIS LAMIERINO |
JP5798470B2 (en) * | 2011-12-13 | 2015-10-21 | 住友重機械工業株式会社 | Motor frame structure |
JP2013132108A (en) * | 2011-12-20 | 2013-07-04 | Sanyo Denki Co Ltd | Stator |
CN104734442B (en) * | 2015-03-17 | 2017-08-11 | 清华大学 | It is a kind of to be applied in short-term the electric excitation synchronous motor of big torque operating mode at a high speed |
DE102016000985A1 (en) * | 2016-01-29 | 2016-09-29 | Daimler Ag | Method for producing an electric machine and electric machine |
WO2017152944A1 (en) * | 2016-03-08 | 2017-09-14 | Arcelik Anonim Sirketi | Electric motor with improved heat dissipation and assemblage |
FR3048924B1 (en) | 2016-03-21 | 2019-03-22 | Valeo Systemes Thermiques | DEBRAYABLE COMPONENT WITH ENDLESS SCREW |
-
2020
- 2020-07-20 EP EP20186687.8A patent/EP3944465A1/en not_active Withdrawn
-
2021
- 2021-04-01 US US18/016,937 patent/US12003138B2/en active Active
- 2021-04-01 CN CN202180060139.3A patent/CN116210136A/en active Pending
- 2021-04-01 EP EP21718050.4A patent/EP4140017A1/en active Pending
- 2021-04-01 WO PCT/EP2021/058574 patent/WO2022017653A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US12003138B2 (en) | 2024-06-04 |
EP3944465A1 (en) | 2022-01-26 |
WO2022017653A1 (en) | 2022-01-27 |
CN116210136A (en) | 2023-06-02 |
US20230275475A1 (en) | 2023-08-31 |
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