SE1951263A1 - An electric machine with an integrated heat exchanger - Google Patents
An electric machine with an integrated heat exchangerInfo
- Publication number
- SE1951263A1 SE1951263A1 SE1951263A SE1951263A SE1951263A1 SE 1951263 A1 SE1951263 A1 SE 1951263A1 SE 1951263 A SE1951263 A SE 1951263A SE 1951263 A SE1951263 A SE 1951263A SE 1951263 A1 SE1951263 A1 SE 1951263A1
- Authority
- SE
- Sweden
- Prior art keywords
- stator
- electric machine
- cooling circuit
- housing
- fluid
- Prior art date
Links
Classifications
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- 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
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- 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
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- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
Abstract
The invention relates to an electric machine (3) with an integrated heat exchanger (12), the electric machine (3) comprising a rotor (16) and a stator (18), which stator (16) at least partly surrounds the rotor (16); and a housing (20), which is configured to circumferentially enclose the stator (18); wherein the heat exchanger (12) comprising a first cooling circuit (22) arranged in the housing (20); a wall (24) of the housing (20) configured to create an interface (26) between the stator (18) and the first cooling circuit (22) in the housing (20); and a second cooling circuit (28) arranged at least partly in the stator (18); wherein the housing (20) is configured to abut against an outer circumference of the stator (18), so that heat from a second fluid (30) in the second cooling circuit (28) is configured to be transferred through the interface (26) between the stator (18) and the housing (20), and further to a first fluid (32) in the first cooling circuit (22). The invention also relates to a vehicle (1) comprising an electric machine (3) with an integrated heat exchanger (12).
Description
An electric machine with an integrated heat exchanger TECHNICAL FIELD The invention relates to an electric machine with an integrated heat exchanger ac-cording to the appended claims. The invention further relates to a vehicle comprisingsuch an electric machine according to the appended claims.
BACKGROUND An electric machine, such as a motor or a generator, generates heat when the ma-chine is working. The increased temperature will reduce the efficiency and the lifespan of the electric machine. Therefore, electric machines usually are provided withan external heat exchanger in order to reduce the temperature and thus maintain orincrease the efficiency and life span. Heated oil from the electric machine is guided tothe external heat exchanger, wherein the temperature of the oil is reduced. Thereaf-ter the oil is returned to the electric machine, which will be cooled by the oil with thereduced temperature.
There are some electric machines, which are provided with a water cooling circuit inthe housing of the electric machine. Generated heat in the housing is transferred tothe cooling water in the water cooling circuit. The heated cooling water is guided toan external water cooler, wherein the temperature of the water is reduced. Thereafter the cooling water is returned to the housing of the electric machine.
Vehicles may be provided with a number of electric machines for different purposes.
Document EP 2760113 A1 discloses an oil and water cooled generator motor. Cool-ing oil is injected in a space comprising armature windings, a stator and a rotor. Thecooling oil will pass the windings and the rotor and be collected in a reservoir situatedin the lowermost part of the motor. A cooling waterway is disposed in the housing onthe outer periphery of the stator. Both the cooling oil and cooling water are cooled in external coolers.
Document JP 2013-162674 A discloses an oil and water cooled generator motor.Cooling oil is circulated in a space comprising armature windings, a stator and a ro-tor. The cooling oil will flow in a channel arranged in a housing, pass the windings,bearings of the rotor and be collected in a reservoir situated in the lowermost part ofthe motor. A cooling watervvay is disposed in the housing outside of the oil channel in the housing. The cooling water is cooled in an external cooler.
SUMMARY The windings in the electric machine generates a significant portion of heat in opera-tion of the machine. The windings are arranged in the stator, and the generated heatis transferred from the windings to the stator. Since the stator of the electric machineis a component of significant weight and mass, heat will be accumulated in stator.The increased temperature in the stator and also in other components of the electricmachine will reduce the efficiency and the life span of the electric machine.
Therefore, it is desired to effectively reduce the temperature of an electric machine to an acceptable or desired operation temperature. ln addition, it is desired to effectively reduce the temperature of a stator in an electric machine.
An object of the invention is therefore to effectively reduce the temperature of an electric machine to an acceptable or desired operation temperature.
A further object of the invention is to effectively reduce the temperature of a stator in an electric machine.
The herein mentioned objects are achieved with an electric machine with an inte-grated heat exchanger according to the appended claims. The herein mentioned ob-jects are also achieved with a vehicle provided with such an electric machine accord- ing to the appended claims.
According to an aspect of the invention, an electric machine with an integrated heatexchanger is provided. The electric machine comprising a rotor and a stator, whichstator at least partly surrounds the rotor; and a housing, which is configured to cir-cumferentially enclose the stator; wherein the heat exchanger comprising a first cool-ing circuit arranged in the housing; a wall of the housing configured to create an inter-face between the stator and the first cooling circuit in the housing; and a second cool-ing circuit arranged at least partly in the stator; wherein the housing is configured toabut against an outer circumference of the stator, so that heat from a second fluid inthe second cooling circuit is configured to be transferred through the interface be-tvveen the stator and the housing, and further to a first fluid in the first cooling circuit.
According to a further aspect of the invention, a vehicle is provided. The vehicle, comprising the electric machine with an integrated heat exchanger disclosed herein.
By such electric machine with an integrated heat exchanger and by such a vehicle,the temperature of the electric machine is effectively reduced to a desired operationtemperature of the electric machine. ln addition, the temperature of the stator in theelectric machine is effectively reduced to reach an operation temperature of the elec-tric machine. Due to the integrated heat exchanger in the electric machine, a mini-mum of external cooling components are used, which will reduce costs and weight ofthe machine. The desired operation temperature of an electric machine may be in thetemperature range of 40°C - 70°C.
Additional objectives, advantages and novel features of the invention will be apparentto one skilled in the art from the following details, and through exercising the invention.While the invention is described below, it should be apparent that the invention maynot be limited to the specifically described details. One skilled in the art, having accessto the teachings herein, will recognize additional applications, modifications and incor-porations in other areas, which are within the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS For fuller understanding of the present disclosure and further objects and advantagesof it, the detailed description set out below should be read together with the accompa-nying drawings, in which the same reference notations denote similar items in the var- ious figures, and in which: Fig. 1 schematically illustrates a side view of a vehicle with an electric machine with an integrated heat exchanger according to an example; Fig. 2 schematically illustrates a section view of an electric machine with an integrated heat exchanger according to an example; and Fig. 3 schematically illustrates a section view in part of stator according to an example.
DETAILED DESCRIPTION An electric machine with an integrated heat exchanger and a vehicle comprising suchan electric machine with an integrated heat exchanger according to the present dis-closure ensures that the temperature of the electric machine is effectively reduced toa desired operation temperature of the electric machine. ln addition, the temperatureof a stator in the electric machine is effectively reduced to reach the desired opera-tion temperature of the electric machine. Due to the integrated heat exchanger in theelectric machine, a minimum of external cooling components are used, which will re-duce costs and weight of the machine. The desired operation temperature of an elec-tric machine may be in the temperature range of 40°C - 70°C, wherein the efficiency and the life span of the electric machine will be optimal.
According to the present disclosure, an electric machine with an integrated heat ex-changer is provided. The electric machine comprising a rotor and a stator, which sta-tor at least partly surrounds the rotor; and a housing, which is configured to circum-ferentially enclose the stator; wherein the heat exchanger comprising a first coolingcircuit arranged in the housing; a wall of the housing configured to create an interface between the stator and the first cooling circuit in the housing; and a second coolingcircuit arranged at least partly in the stator; wherein the housing is configured to abutagainst an outer circumference of the stator, so that heat from a second fluid in thesecond cooling circuit is configured to be transferred through the interface betweenthe stator and the housing, and further to a first fluid in the first cooling circuit.
The electric machine may be an electric motor or an electric generator or a combinedelectric motor and generator. Thus, the electric machine is able to generate rotationalspeed and torque when feeding the electric machine with electric power from anelectric power source, such as an energy storage unit, such as a battery. ln addition,the electric machine is able to generate electric power when torque from an externalsource generates rotational speed of the rotor of the electric machine. As a genera-tor, the electric machine may generate electric power to the energy storage unit, suchas a battery. The electric machine may be any type of electric machine, such as a di-rect current (DC) electric machine or an alternate current (AC) electric machine.
The integrated heat exchanger is primarily arranged within the electric machine andis a part of the components of the electric machine. The heat exchanger is arrangedto transfer heat between the first and second fluid. The first and second fluids are separated from each other in the heat exchanger.
The rotor is rotatable arranged in the electric machine. The rotor is configured to ro-tate about a rotor shaft, which is arranged in bearings in the housing of the electric machine. The rotor has a circular configuration and an axial extension.
The stator is provided with windings in which an electric field is generated during op-eration of the electric machine. The electric field generated in the windings will gener-ate heat in the electric machine. The stator at least partly surrounds the rotor. Thestator has an inner circular configuration with an inner diameter which is larger thanthe outer diameter of the rotor. An outer wall of the stator may have a circular config-uration or another shape. The stator at least partly surrounds the rotor. Thus, the sta- tor may have a shorter axial extension than the axial extension of the rotor.
The housing is configured to circumferentially enclose the stator. The housing maybe an inner housing or an outer housing of the electric machine. The housing mayalso be a combined inner and outer housing. An inner wall of the housing is config-ured to abut the outer wall of the stator. The inner wall of the housing may thus beconfigured to follow the shape of the outer wall of the stator. Thus, the shape of theouter wall of the stator may correspond to the inner shape of the wall of the housing.As mentioned above, the outer wall of the stator may have a circular configuration oranother shape. Therefore, the shape of the inner wall of the housing may have a cir-cular configuration or another shape, depending on the shape of the outer wall of thestator.
The first cooling circuit is at least partly arranged in the housing. The first cooling cir-cuit may comprise channels arranged in the housing. The channels may extend in acircumferentially or in an axially direction in the housing in relation to the axial exten-sion of the electric machine. Alternatively, the channels may extend both circumfer-entially and axially in the housing. The first cooling circuit is a part of the integratedheat exchanger in the electric machine.
The wall of the housing, which is configured to create an interface between the statorand the first cooling circuit in the housing, may be the inner wall of the housing. Thewall of the housing, which is directed towards the stator is configured to abut the wallof the stator. The wall of the housing may thus be configured to follow the shape ofthe wall of the stator, facing the wall of the housing. Thus, the shape of the wall of thestator facing the wall of the housing may correspond to the shape of the wall of thehousing. The area of the wall of the housing that faces the stator comprises the inter-face between the stator and the first cooling circuit in the housing. ln addition, thatarea of the stator, which faces the wall of the housing comprises the interface. Theintegrated heat exchanger in the electric machine comprises the interface betweenthe stator and the first cooling circuit. Thus, in the integrated heat exchanger heat istransferred through the interface.
The second cooling circuit is arranged at least partly in the stator. The second cool-ing circuit may comprise channels arranged in the stator. The channels may extend in a circumferentially or in an axially direction in the stator in relation to the axial ex-tension of the electric machine. Alternatively, the channels may extend both circum-ferentially and axially in the stator. The second cooling circuit is a part of the inte-grated heat exchanger in the electric machine.
The first fluid may be water, which is arranged to flow within the first cooling circuit inthe housing. Other fluids than water are possible to arrange to flow within the firstcooling circuit, such as oil, a powder or any other type of coolant. Also, a combinationof different fluids are possible to arrange to flow within the first cooling circuit.
The second fluid may be oil, which is arranged to flow within the second cooling cir-cuit in the stator. Other fluids than oil are possible to arrange to flow within the sec-ond cooling circuit. Also, a combination ofdifferent fluids are possible to arrange to flow within the second cooling circuit.
Heat generated in the electric machine is transferred to the second fluid. The heat inthe second fluid in the second cooling circuit is configured to be transferred throughthe interface between the stator and the housing, and further to a first fluid in the first cooling circuit.
According to an example, the stator comprises discs arranged to form the secondcooling circuit in the stator.
The discs are arranged beside each other in the axially direction of the electric ma-chine. The axially arranged discs together create a stack of discs and will togethercreate the shape of the stator. The discs may have a similar shape. The discs mayhave apertures between a center axis and the periphery of the disc and/or aperturesin the periphery of the discs. The apertures in the discs may create spaces or chan-nels in the stack of discs, which spaces or channels creates the second cooling cir-cuit in the stator. Some of the discs may be differently arranged in the stack by pivot-ing them some degrees in relation to other discs in the stack. When pivoting some ofthe discs, the apertures in the respective discs creates the shape of the second cool-ing circuit in the stator.
According to an example, the stator comprises at least two sets of discs of differentconfiguration, wherein the at least two sets of discs of different configuration together form the second coo|ing circuit.
Some of the discs may have a different shape than other discs in the stack, so thatthe discs of different shape together create the second coo|ing circuit in the stator.Some of the discs may have apertures between a center axis and the periphery ofthe disc and/or apertures in the periphery of the discs. The apertures in the discsmay create spaces or channels in the stack of discs, which spaces or channels cre-ates the second coo|ing circuit in the stator.
According to an example, the second coo|ing circuit is arranged at least partly in the outer circumference of the stator.
The discs may be provided with apertures in the periphery. The apertures in the pe-riphery of the discs will create spaces or channels in the stack of discs, which spacesor channels creates the second coo|ing circuit in the stator. Arranging the secondcoo|ing circuit at least partly in the outer circumference of the stator will improve thetransfer of heat from the second fluid in the second coo|ing circuit through the inter-face and to the first fluid in the first coo|ing circuit.
According to an example, the part of the second coo|ing circuit, which is arranged inthe outer circumference of the stator extends in a circumferentially direction of thestator.
By arranging the second coo|ing circuit in a circumferentially direction of the stator,the exposed area of the second coo|ing circuit to the interface and the first coo|ingcircuit will be large, which will increase the heat transfer between the coo|ing circuits.
According to an example, the part of the second coo|ing circuit, which is arranged inthe outer circumference of the stator, comprises a plurality of channels extending inparallel.
A parallel configuration of the channels of the second cooling circuit in the stator willcreate a large exposed area of the channels and the second cooling circuit to the in-terface and the first cooling circuit, which will increase the heat transfer between the cooling circuits.
According to an example, the plurality of channels extending in parallel are con-nected with each other, so that the second fluid is allowed to flow from one channel to another channel.
The connection of the channels may be so arranged that the direction of flow of thesecond fluid will be different between the channels of the second cooling circuit. This will increase the heat transfer between the first and second cooling circuits.
According to an example, the interface between the stator and the housing is config-ured to at least partly form a wall portion of the second cooling circuit, so that thesecond fluid in the second cooling circuit is configured to have physical contact withthe interface.
Arranging the second cooling circuit in the outer wall of the stator will create a chan-nels with walls combined of the inner wall of the housing and the outer wall of the sta-tor. Thus, the housing and the stator together will create the shape of the secondcooling circuit. When the second fluid in the second cooling circuit is configured tohave physical contact directly with the interface, the heat transfer between the first and second cooling circuits will increase.
According to an example, the second cooling circuit is arranged at least partly in anaxial direction of the stator.
The second cooling circuit comprises channels that may extend at least partly in anaxial direction of the stator and thus the axial direction of electric machine. Such axialextending channels may guide the second fluid to other parts of the second coolingcircuit, such as the part of the second cooling circuit that extend in a circumferentiallydirection of the stator.
According to an example, turbulating elements are arranged in the second coolingcircuit, which turbulating elements are configured for creating a turbulent flow of the second fluid in the second cooling circuit.
The turbulating elements may be a separate component arranged in the second cool-ing circuit. The turbulating elements may have the shape of a circular pin or piece ofa flat panel. The turbulating elements disturb the laminate flow of the second fluid.The turbulent flow of the second fluid in the second cooling circuit, which is createdby the turbulating elements, increases the heat transfer between the first and secondcooling circuits According to an example, the turbulating elements are configured by a portion of atleast one disc of the stator.
Alternatively, or in combination with separate component arranged in the secondcooling circuit, the turbulating elements may be configured by the discs of the stator.The turbulent flow of the second fluid in the second cooling circuit, which is createdby the turbulating elements, increase the heat transfer between the first and secondcooling circuits According to the present disclosure, a vehicle is provided. The vehicle, comprisingthe electric machine with an integrated heat exchanger disclosed herein.
A vehicle provided with such an electric machine with an integrated heat exchangerwill benefit from the high efficiency and long life span of the electric machine. Theelectric machine may be a propulsion unit in the vehicle. The electric machine maybe connected to a power source in the vehicle, such as energy storage unit. Duringsome driving conditions of the vehicle, the electric machine may generate electricpower to the energy storage unit. The vehicle may also be provided with a range ex-tender. Such a range extender may be a small internal combustion engine, which isconnected to a generator in order to charge energy storage units, such as batteries. 11 The first cooling circuit may be connected to a first fluid pump for creating a flowwithin the first cooling circuit. The first cooling circuit may also be connected to an ex-ternal coo|er for reducing the temperature of the first fluid. The second cooling circuitmay be connected to a second fluid pump for creating a flow within the second cool- ing circuit.
The present disclosure will now, according to an example, be further illustrated with reference to the appended figures.
Fig. 1 schematically illustrates a side view of a vehicle 1 with an electric machine 3with an integrated heat exchanger 12 according to an example. The electric machine3 is arranged in a powertrain 2 of the vehicle 1. The powertrain 2 also comprises aninternal combustion engine 4, a transmission 6 connected to the electric machine 4and to a propeller shaft 8. The propeller shaft 8 extends between the transmission 6and drive wheels 10 of the vehicle 1. The electric machine 4 and the internal com-bustion engine 4 are propulsion units in the powertrain 2. However, the vehicle 1 maybe provided only with electric machines 3 as propulsion units. An energy storage unit14 is arranged in the powertrain 2. The energy storage unit 14 is connected to theelectric machine 3.
Fig. 2 schematically illustrates a section view of an electric machine 3 with an inte-grated heat exchanger 12 according to an example. The electric machine 3 com-prises a rotor 16 and a stator 18, which stator 18 surrounds the rotor 16. The rotor 16is rotatably arranged on a rotor shaft 19. A housing 20 is configured to circumferen-tially enclose the stator 18. The heat exchanger 12 comprising a first cooling circuit22 arranged in the housing 20. A wall 24 of the housing 20 is configured to create aninterface 26 between the stator 18 and the first cooling circuit 22 in the housing 20. Asecond cooling circuit 28 is partly arranged in the stator 18. The housing 20 is config-ured to abut against an outer circumference of the stator 18, so that heat from a sec-ond fluid 30 in the second cooling circuit 28 is configured to be transferred throughthe interface 26 between the stator 18 and the housing 20, and further to a first fluid32 in the first cooling circuit 22. The interface 26 between the stator 18 and the hous-ing 20 is configured to at least partly form a wall portion 38 of the second cooling cir-cuit 28, so that the second fluid 30 in the second cooling circuit 28 is configured to 12 have physical contact with the interface 26. The first cooling circuit 22 is connected toa first fluid pump 44 for creating a fluid flow within the first cooling circuit 22. The firstcooling circuit 22 may also be connected to an external cooler 46 for reducing thetemperature of the first fluid 32. The second cooling circuit 28 may be connected to asecond fluid pump 48 for creating a flow within the second cooling circuit 28. The flowpath and flow directions of the first and second fluids are indicated with arrows in fig.2.
Fig. 3 schematically illustrates a section view in part of stator 18 according to an ex-ample. The stator 18 comprises discs 34 arranged to form the second cooling circuit28 in the stator 18. The discs 34 may have a similar shape. Some of the discs 34 maybe differently arranged in relation to each other. By pivoting the discs 34 some degreesin relation to one other, apertures in the respective discs 34 creates the shape of thesecond cooling circuit 28 in the stator 18. The stator 18 may comprise at least two setsof discs 34 of different configuration, wherein the at least two sets of discs 34 of differ-ent configuration together form the second cooling circuit 28. The second cooling cir-cuit 28 is partly arranged in the outer circumference of the stator 18, wherein the partof the second cooling circuit 28, which is arranged in the outer circumference of thestator 18 extends in a circumferentially direction of the stator 18. The part of the secondcooling circuit 28, which is arranged in the outer circumference of the stator 18, com-prises a plurality of channels 36 extending in parallel. The plurality of channels 36 ex-tending in parallel are connected with each other, so that the second fluid 30 is allowedto flow from one channel 36 to another channel 36. The second cooling circuit 28 isalso arranged at least partly in an axial direction of the stator 18. Turbulating elements40 are arranged in the second cooling circuit 28, which turbulating elements 40 areconfigured for creating a turbulent flow of the second fluid 30 (fig. 2) in the secondcooling circuit 28. The turbulating elements 40 are configured by a portion 42 of at leastone disc 34 of the stator 18.
The foregoing description of the examples has been furnished for illustrative and de-scriptive purposes. lt is not intended to be exhaustive, or to limit the examples to thevariants described. Many modifications and variations will obviously be apparent toone skilled in the art. The examples have been chosen and described in order to bestexplicate principles and practical applications, and to thereby enable one skilled in 13 the art to understand the examples in terms of its various examples and with the vari-ous modifications that are applicable to its intended use. The components and fea-tures specified above may, within the framework of the examples, be combined be-tvveen different examples specified.
Claims (12)
1. An electric machine (3) with an integrated heat exchanger (12), the electric ma-chine (3) comprising a rotor (16) and a stator (18), which stator (16) at least partly surrounds the ro-tor (16); and a housing (20), which is configured to circumferentially enclose the stator (18);wherein the heat exchanger (12) comprising a first cooling circuit (22) arranged in thehousing (20); a wall (24) of the housing (20) configured to create an interface (26) betweenthe stator (18) and the first cooling circuit (22) in the housing (20); and a second cooling circuit (28) arranged at least partly in the stator (18); wherein the housing (20) is configured to abut against an outer circumferenceof the stator (18), so that heat from a second fluid (30) in the second cooling circuit(28) is configured to be transferred through the interface (26) between the stator (18)and the housing (20), and further to a first fluid (32) in the first cooling circuit (22).
2. The electric machine (3) according to claim 1, wherein the stator (18) comprisesdiscs (34) arranged to form the second cooling circuit (28) in the stator (18).
3. The electric machine (3) according to any one of claims 1 and 2, wherein the stator(4) comprises at least two sets of discs (18) of different configuration, wherein the atleast two sets of discs (18) of different configuration together form the second coolingcircuit (28).
4. The electric machine (3) according to any one of the preceding claims, wherein thesecond cooling circuit (28) is arranged at least partly in the outer circumference of thestator (18).
5. The electric machine (3) according to claim 4, wherein the part of the second cool-ing circuit (28), which is arranged in the outer circumference of the stator (18) ex-tends in a circumferentially direction of the stator (18).
6. The electric machine (3) according to any one of claims 4 and 5, wherein the partof the second cooling circuit (22), which is arranged in the outer circumference of the stator (18), comprises a plurality of channels (36) extending in parallel.
7. The electric machine (3) according to claim 6, wherein the plurality of channels(36) extending in parallel are connected with each other, so that the second fluid (30)is allowed to flow from one channel (36) to another channel (36).
8. The electric machine (3) according to any one of the preceding claims, wherein theinterface (26) between the stator (18) and the housing (20) is configured to at leastpartly form a wall portion (38) of the second cooling circuit (22), so that the secondfluid (30) in the second cooling circuit (22) is configured to have physical contact withthe interface (26).
9. The electric machine (3) according to any one of the preceding claims, wherein thesecond cooling circuit (22) is arranged at least partly in an axial direction of the stator(18).
10. The electric machine (3) according to any one of the preceding claims, whereinturbulating elements (40) are arranged in the second cooling circuit (22), which turbu-lating elements (40) are configured for creating a turbulent flow of the second fluid(30) in the second cooling circuit (22).
11. The electric machine (3) according to claim 10, wherein the turbulating elements(40) are configured by a portion (42) of at least one disc (34) of the stator (18).
12. A vehicle (1), comprising an electric machine (3) with an integrated heat ex- changer (12) according to any one of the preceding claims.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1951263A SE544011C2 (en) | 2019-11-05 | 2019-11-05 | An electric machine with an integrated heat exchanger |
| PCT/SE2020/051035 WO2021091452A1 (en) | 2019-11-05 | 2020-10-27 | An electric machine with an integrated heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1951263A SE544011C2 (en) | 2019-11-05 | 2019-11-05 | An electric machine with an integrated heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1951263A1 true SE1951263A1 (en) | 2021-05-06 |
| SE544011C2 SE544011C2 (en) | 2021-11-02 |
Family
ID=73040219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1951263A SE544011C2 (en) | 2019-11-05 | 2019-11-05 | An electric machine with an integrated heat exchanger |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE544011C2 (en) |
| WO (1) | WO2021091452A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023214190A1 (en) * | 2022-05-06 | 2023-11-09 | Safran Aircraft Engines | Electric machine heat exchanger |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003324901A (en) * | 2002-04-26 | 2003-11-14 | Nippon Soken Inc | Motor |
| US20120080965A1 (en) * | 2010-10-04 | 2012-04-05 | Bradfield Michael D | Coolant Channels for Electric Machine Stator |
| US20150145356A1 (en) * | 2013-11-27 | 2015-05-28 | Skf Magnetic Mechatronics | Versatile cooling housing for an electrical motor |
| EP2897259A2 (en) * | 2014-01-20 | 2015-07-22 | Hitachi Ltd. | Rotating electric machine |
| EP3109977A1 (en) * | 2015-06-25 | 2016-12-28 | Hitachi, Ltd. | Rotating electrical machine and cooling system of rotating electrical machine |
| WO2018131197A1 (en) * | 2017-01-10 | 2018-07-19 | Dmg森精機株式会社 | Motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006006839B4 (en) * | 2006-02-14 | 2007-12-27 | Siemens Ag | Electric machine (generator or motor) |
| DE102007036032A1 (en) * | 2007-08-01 | 2009-02-19 | Ritz Pumpenfabrik Gmbh & Co Kg | Submersible motor with heat exchanger |
| US8395287B2 (en) * | 2010-10-04 | 2013-03-12 | Remy Technologies, Llc | Coolant channels for electric machine stator |
| JP5706793B2 (en) | 2011-09-20 | 2015-04-22 | 日立建機株式会社 | Generator motor and electric vehicle using the same |
| JP5908741B2 (en) | 2012-02-07 | 2016-04-26 | 東芝産業機器システム株式会社 | Rotating electric machine |
| DE102012022451B4 (en) * | 2012-11-09 | 2016-08-18 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Ring channel device, electric machine and drive train |
-
2019
- 2019-11-05 SE SE1951263A patent/SE544011C2/en unknown
-
2020
- 2020-10-27 WO PCT/SE2020/051035 patent/WO2021091452A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003324901A (en) * | 2002-04-26 | 2003-11-14 | Nippon Soken Inc | Motor |
| US20120080965A1 (en) * | 2010-10-04 | 2012-04-05 | Bradfield Michael D | Coolant Channels for Electric Machine Stator |
| US20150145356A1 (en) * | 2013-11-27 | 2015-05-28 | Skf Magnetic Mechatronics | Versatile cooling housing for an electrical motor |
| EP2897259A2 (en) * | 2014-01-20 | 2015-07-22 | Hitachi Ltd. | Rotating electric machine |
| EP3109977A1 (en) * | 2015-06-25 | 2016-12-28 | Hitachi, Ltd. | Rotating electrical machine and cooling system of rotating electrical machine |
| WO2018131197A1 (en) * | 2017-01-10 | 2018-07-19 | Dmg森精機株式会社 | Motor |
Also Published As
| Publication number | Publication date |
|---|---|
| SE544011C2 (en) | 2021-11-02 |
| WO2021091452A1 (en) | 2021-05-14 |
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