Apparatus and method for liquid cooling of an electric motor

专利摘要:
SUMMARY The present invention relates to a device for liquid cooling of a single motor (1) with a rotor (10) and a stator (20). The device comprises at least one coolant applicator (40) arranged to apply coolant to said stator (20). Said coolant applicator (40) is movably arranged relative to said stator (20) so that the coolant (L) is applied to different areas of said stator (20) by means of coolant applicator movement. The present invention also relates to a method for liquid cooling of an electric motor. The present invention also relates to a platform. (Fig. 2)
公开号:SE1550409A1
申请号:SE1550409
申请日:2015-04-02
公开日:2016-10-03
发明作者:Lassila Viktor
申请人:BAE Systems Hägglunds AB；
IPC主号:

专利说明:

This problem is usually solved by applying instead of applying the coolant in the form of a substantially striking jet which strikes the same surface to the stator winding, applying the coolant in the form of a spray (aerosol particles) which is sprayed over the stator winding and in particular its end faces at the stator winding. end portions.
Such a solution is described, for example, in US2648085 where coolant is sprayed on the stator winding.
A problem with spray cooling is that a certain flow is required for the spray / mist to be created. If the flow is too low, the desired spraying is not achieved and the cooling suffers. In this case, there is a risk of creating so-called local hot spots.
OBJECT OF THE INVENTION An object of the present invention is to provide an apparatus and method for liquid cooling of an electric motor which solves or at least alleviates one or more of the above-mentioned problems associated with cooling devices according to the prior art.
A particular object of the present invention is to provide an apparatus and method for liquid cooling of an electric motor which results in simple and efficient cooling of the electric motor.
SUMMARY OF THE INVENTION These and other objects, which appear from the following description, are achieved by means of a device and a method of initially stated kind and which further have the features stated in the characterizing part of appended independent claims 1 and 12. Furthermore, the objects are achieved by a platform according to Preferred embodiments of the device, method and platform are defined in appended dependent claims 2-10, 12-17 and 18.
According to the invention, the objects are achieved with a device for liquid cooling of an electric motor with a rotor and a stator, comprising at least one coolant applicator arranged to apply coolant to said stator, characterized in that said coolant applicator is movably arranged relative to said stator so that the coolant different areas of said stator.
By arranging said coolant applicator so that it moves relative to the stator when applying coolant, the coolant can be applied in the form of one or more jets which due to the movement of the coolant applicator hit different areas of the end portion of the stator, whereby erosion problems of the above can be avoided or at least greatly reduced. . Consequently, the problem which arises if spray function ceases with the consequence of a directed jet is solved in that the coolant applicator is thus arranged movably. This makes it possible to use coolant applicator without spray function / spray nozzles in that good distribution of coolant is made possible thanks to the movement of the coolant applicator, but also coolant applicator with spray function / spray nozzle which, when functioning spraying, distributes the coolant further. distribution of the coolant.
Consequently, this enables efficient and simple cooling of the electric motor.
According to an embodiment of the device, said coolant applicator comprises a nozzle for dispensing said coolant and a holder for supporting said nozzle. This makes it possible to allow movement of the nozzle relative to the holder. Each coolant applicator may include one or more nozzles. A nozzle may have one or more outlets for dispensing coolant. According to an embodiment of the device, said nozzle is movably arranged relative to said holder. This achieves an efficient way of distributing the coolant through the movement of the nozzle.
According to an embodiment of the device, said nozzle comprises an eccentrically arranged outlet so that the nozzle is allowed to move relative to the holder by means of a force generated by liquid delivery. An efficient coolant applicator is provided. method to move only by force from the liquid delivery According to an embodiment of the device, said holder is movably arranged relative to said stator. This provides an alternative way of effecting movement of the coolant applicator for efficient distribution of the coolant.
According to a variant, the holder is arranged in a movable manner.
According to an embodiment of the device, said movement of the coolant applicator is arranged to take place by means of a force generated by liquid delivery. This enables automatic movement of the coolant applicator by the force of the liquid delivery and consequently efficient and simple cooling of the electric motor.
According to an embodiment of the device, said coolant applicator is supported by means of a housing accommodating an electric motor.
According to an embodiment of the device, the coolant applicator is supported by means of a gable portion of said housing.
According to an embodiment of the device, the coolant applicator is supported by means of the rotor shaft of said rotor.
According to an embodiment of the device, the coolant applicator is arranged to apply coolant at least to an end portion of said stator. In this case, coolant is applied to the part where cooling is most required. According to the invention, the objects are achieved with a method for liquid cooling of an electric motor with a rotor and a stator, comprising the steps of: applying coolant to said stator by means of at least one coolant applicator, characterized in that during said application of the coolant causing said coolant applicator to move relative to said stator so that the coolant is applied to different areas of said stator by the movement of the coolant applicator.
As a result, the coolant can be applied in the form of one or more jets which, thanks to the movement of the coolant applicator, hit different areas of the end portion of the stator, whereby erosion problems of the above kind can be avoided or if spraying ceases with the result of a directed jet. consequently, the problem of the coolant applicator is thus movably arranged. This makes it possible to use coolant applicator without spray function / spray nozzles in that good distribution of coolant is made possible thanks to the movement of the coolant applicator, but also coolant applicator with spray function / spray nozzle which, when functioning spraying, distributes the coolant further. distribution of the coolant.
Consequently, this enables efficient and simple cooling of the electric motor.
According to one embodiment, the method comprises the step of dispensing said coolant by means of a nozzle supported by a holder for said nozzle. This makes it possible to allow movement of the nozzle relative to the holder. Each coolant applicator may include one or more nozzles. A nozzle may have one or more outlets for dispensing coolant.
According to one embodiment, the method comprises the step of dispensing liquid by means of said nozzle for effecting movement of the nozzle relative to said holder. This achieves an efficient way of distributing the coolant through the movement of the nozzle. According to an embodiment of the method, the step of dispensing liquid takes place by means of an eccentrically arranged outlet of the nozzle so that the nozzle is allowed to move relative to the holder by means of a force generated by liquid dispensing.
This provides an efficient way for the liquid delivery to touch the coolant applicator. According to one embodiment, the method comprises the step of causing said holder to move relative to said stator during said application of the coolant. This provides an alternative way of effecting movement of the coolant applicator for efficient distribution of the coolant. According to a variant, the holder is arranged in a movable manner.
According to one embodiment, the method comprises the step of generating a force generated by liquid delivery for effecting said movement of the coolant applicator. This enables automatic movement of the coolant applicator by the force of the liquid delivery and consequently efficient and simple cooling of the electric motor.
According to an embodiment of the method, the step of applying coolant to said stator comprises applying coolant to at least one end portion of said stator. In this case, coolant is applied to the part where cooling is most required.
DESCRIPTION OF THE DRAWINGS The present invention will be better understood with reference to the following detailed description read in conjunction with the accompanying drawings, in which like reference numerals refer to like parts throughout the many views, and in which: Fig. 1 schematically illustrates a platform according to an embodiment of the present invention; invention; Fig. 2 schematically illustrates a cross-sectional view of an electric motor with a device for liquid cooling of the electric motor according to an embodiment of the present invention; Fig. 3a schematically illustrates a coolant applicator according to an embodiment of the present invention; Fig. 3b schematically illustrates a coolant applicator according to an embodiment of the present invention; Fig. 3c schematically illustrates a coolant applicator according to an embodiment of the present invention; Fig. 4 schematically illustrates a block diagram of a method for liquid cooling of an electric motor according to an embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS Referring to Fig. 1, there is shown a platform P, where the platform P is included in a group comprising motor vehicles such as military vehicles, work vehicles, passenger cars, boats, helicopters or the like, a power station, any electrically powered machine or similar device where the device includes an electric motor for operating the same. The platform P comprises at least one electric motor 1 comprising a device I for liquid cooling of the electric motor 1 according to the present invention.
In an embodiment in which the electric motor 1 is included in a motor vehicle, the electric motor 1 is configured for operation of said motor vehicle, which thus constitutes an electric motor vehicle. The liquid cooling device I can be designed in accordance with any of the embodiments described below. Fig. 2 schematically illustrates a cross-sectional view of an electric motor 1 with a device I for liquid cooling of the electric motor according to an embodiment of the present invention, Fig. 3 a side view of the fig. Fig. 2 shows the electric motor 1 with device I, and Fig. 4 shows an axial cross-section of the device shown in fig. 2 shows the electric motor 1 with device 1.
The electric motor 1 is of the inner rotor type comprising a rotor 10 and a winding stator 20. By electric motor 1 of inner rotor type is meant an electric motor 1 where the stator 20 is arranged to enclose the rotor 10. The outer surface of the rotor 10 is arranged adjacent and separated from the inner surface of the stator 20. The rotor 10 is according to a variant built up of rotor plates stacked on top of each other, not shown. The rotor 10 is arranged concentrically relative to the stator 20.
In one embodiment, according to one embodiment, the center axis of the rotor 10 and the stator 20 substantially coincides with a center axis X of the electric motor 1. According to an alternative embodiment, the center axis of the rotor 10 and the stator 20 may be eccentrically arranged relative to the center axis of the electric motor 1.
Said rotor 10 is intended to be connected to a drive shaft (not shown) and is thus arranged to rotate the drive shaft or to be rotated by the drive shaft.
The rotor 10 has opposite end portions in the form of rotor ends 10a, 10b.
The rotor ends 10a, 10b form end surfaces of the cylindrical rotor 10.
The rotor 10 has a jacket surface 12 which faces the stator 20 and forms what is referred to herein as the outer surface of the rotor. The electric motor 1 further comprises a rotor shaft 14 which is coupled to the rotor 10 and projects axially from at least one rotor end 10a, 10b. The rotor shaft 14 is usually also the cylindrical and concentrically arranged with the rotor 10 and the stator 20 so that its center axis coincides with the above-mentioned center axis X of the electric motor 1. The rotor shaft 14 may be a one-sided rotor shaft projecting from a single side of the electric motor 1 or so it can, as illustrated in Fig. 2, be a double-sided rotor shaft projecting from both sides of the electric motor 1. During operation of the electric motor 1, the rotor 10 and thus the rotor shaft 14 are caused to rotate, the rotor shaft 14 being arranged to outside the electric motor 1 transmits a driving torque to a driving device (not shown), for example for propelling an electrically driven motor vehicle. Alternatively, the electric motor can be driven by the vehicle, where the electric motor brakes by creating a negative torque, whereby the electric motor consequently acts as a generator.
The stator 20 is according to a variant built up of stator plates stacked on top of each other (not shown). The stator 20 comprises a stator winding 22. According to a variant, the stator winding comprises a set of electrically conductive wires / conductors, preferably copper wires, through which a current is arranged to be conducted for driving the electric motor 1. Said conductors may be of different thicknesses. Said stator winding 22 is arranged to run axially so that the winding is adjacent adjacent to the rotor 10. The stator winding 22 is arranged to project axially from end portions 20a, 20b of the stator 20, facing outside the end portions 20a, 20b and re-inserted through the end portions, said projecting portion 22 of the stator winding 22 forms a so-called end face 22b.
The electrically conductive wires of the stator 20 are according to a variant arranged to run axially in compartments or recesses of said stator plates, the different tree lengths being arranged to be led out of the end portions 20a, 20b of the stator 20 from a compartment or recess in the stator plates and back into in another compartment or recess in the stator plates.
The stator 20 also has a mantle surface 24a. The stator 20 then forms a cylindrical shell which surrounds the rotor 10 so that the mantle surface 12a of the rotor is completely enclosed by an inner surface or inner surface 24b of the stator 20 in the radial direction of the rotor 10. The outer surface as well as the mantle surface 12 of the rotor 10 is arranged adjacent and separated from said inner surface 24b of the stator 20, an air gap being formed between the rotor 10 and the stator 20. The stator winding 22 of the stator 20 is arranged according to the present invention run along and axially project from and turn outside the mantle surface of the stator 20.
The electric motor 1 further comprises a motor housing 30 enclosing the components included in the electric motor 1, including the rotor 10 and the stator 20. The motor housing 30 comprises wall portions 30a, 30b enclosing the rotor / stator package in its axial directions, which wall portions will hereinafter be referred to as the motor housing end portions 30a , 30b, and wall portions 30c which enclose the rotor / stator package in its radial directions and hereafter will be referred to as the casing walls 30c of the motor housing. The motor housing 30 may have a substantially arbitrary shape but is typically cylindrical in which the casing walls 30c of the motor housing form a casing surface in the form of a cylindrical shell enclosing the casing surface 24a of the stator 20, and the motor housing end portions 30a, 30b being substantially circular end portions of said cylindrical externally and encloses the end portions 10a, 10b, 20a, 20b of the rotor and stator.
The cooling device I comprises at least one coolant applicator 40 arranged to apply coolant L to said stator 20. Said coolant applicator 40 is movably arranged relative to said stator 20 so that the coolant L through the movement of the coolant applicator is applied to different areas of said stator 20. Coolant is applied applying coolant at least to the end portions 20a, 20b of said stator 22 and thereby the end faces 22a, 22b of the stator winding 22.
The coolant applicator 40 may be arranged and supported in any suitable manner at any suitable location adjacent to the stator 20 for cooling the same.
According to one embodiment, the coolant applicator 40 is arranged to be supported by means of said housing 30. The device I according to Fig. 2 illustrates a number of variants the coolant applicator could be supported. on how to illustrate coolant applicators 40 supported by the end portion 40 of said housing 30.
Furthermore, a coolant applicator 40 is shown supported by the rotor shaft of said rotor.
In addition, a coolant applicator 40 is shown supported by the jacket wall 30c of the housing 30.
Said coolant applicator 40 comprises at least one nozzle 42 for dispensing said coolant and a holder 44 for supporting said nozzle.
According to one embodiment, the nozzle 44 is movably arranged relative to said holder 44.
According to an embodiment, said nozzle 42 comprises an eccentrically arranged outlet so that the nozzle is allowed by means of a force generated by liquid discharge coolant applicator is illustrated in Fig. 3a. According to one embodiment, said holder 44 is movably arranged relative to said stator 20. According to one embodiment, said holder 44 is movably arranged relative to the point of attachment, i.e. movably arranged relative to the place where it is supported, for example end portion 30a, 30b of the housing 30, jacket wall of the housing 30 or the rotor shaft 14, so that the coolant L is distributed over different areas of the stator 20.
Said movement of the coolant applicator 40 is according to an embodiment arranged to take place by means of a force generated by liquid delivery. Referring to Fig. 2, the cooling device I according to the invention further comprises a coolant circuit comprising a pump unit 50 arranged to supply pressurized coolant to the coolant applicators 40 via lines C1, C2, C3, C4 by means of a pump included in the pump unit.
In some embodiments, the pump of the pump unit 50 is arranged to generate a substantially constant pressure on the coolant L and thus a substantially constant outflow on the coolant L which is emitted from the moving coolant applicators 40 towards the end portions 20a, 20b of the stator.
In other embodiments, the device I may comprise a control unit that controls the pump of the pump unit 50 to adjust the outflow of the coolant L based on different control parameters. For example, the control unit may be arranged to control the outflow of coolant from the coolant applicators 40 based on one or more control parameters including the speed of the electric motor and / or at least one temperature indication indicative of the temperature of the electric motor or components contained therein.
According to one embodiment, the control unit is included in the pump unit 50.
The control unit for controlling the pump of the pump unit 50 may be an external pump unit.
The device I is furthermore according to a variant arranged for reuse of the coolant which has been flushed onto the components of the electric motor by means of the coolant applicators 40 in order to cool them. In this case, the device I may comprise a coolant bin or other collecting device for collecting the coolant which has been flushed on the engine components, and a coolant line for the coolant L back to the coolant applicators 40 to be flushed back on the electric motor components. To transport via the pump unit 50 For efficient cooling of the coolant L and the components on which it is flushed, the cooling device advantageously comprises a cooler arranged to cool the coolant L before it is reused, i.e. after it has been collected after being thrown out against the engine components from coolant applicators 40 and 10 before being returned to the coolant applicators to be ejected again.
The radiator is as a rule arranged outside the motor housing 30 and can in certain embodiments be included in the pump unit 50 in order to thereby constitute a combined pump and cooling component which can be installed in a space-saving manner along the coolant line. Coolant for cooling coolant is well known in the art and the cooler may be configured and designed to cool the coolant L according to any of the known principles of liquid cooling.
Figs. 3a-c schematically illustrate a coolant applicator 140; 240; 340 according to embodiments of the present invention. Coolant Applicator 140; 240; 340 has been illustrated as supported by the housing 30 of the electric motor.
Coolant Applicator 140; 240; 340 may be supported by any suitable means.
The coolant applicator 140; 240; 340 is movably arranged relative to the stator so that the coolant is applied to different areas of said stator by the movement of the coolant applicator. Coolant Applicator 140; 240; 340 is movably disposed relative to the housing 30. The coolant applicator 140; 240; 340 is movably arranged relative to its attachment.
The coolant applicator 140; 240; 340 includes a nozzle 142; 242; 342 for dispensing said coolant L and a pourer 144; 244; 344 for supporting said nozzle.
Fig. 3a schematically illustrates 140 according to an embodiment of the present invention. The coolant applicator 140 comprises a nozzle 142 and a holder 144. a coolant applicator The nozzle 142 is movably arranged relative to said holder 144. The nozzle 142 is spherical. The nozzle 142 has a spherical body 142b. The holder 144 may have any suitable shape. The holder 144 has an outlet side 144a and a substantially opposite fastening side 144b. The nozzle 142 is arranged adjacent to the outlet side 144a. The fastening side 144b is intended to be fastened in connection with the housing 30, the rotor shaft or the like of the electric motor. According to this embodiment, the holder 144 is fixedly attached to the housing 30, for example the end portion of the housing.
The holder comprises a space 144c arranged in connection with the outlet side in which the nozzle is movably arranged. The space 144c is consequently slightly larger than the spherical body 142b of the nozzle 142.
The holder 144 has a conduit 144d running from the attachment side to the nozzle for transporting pressurized coolant L supplied from the pump unit via the housing 30 to the nozzle 142. The nozzle 144 is connected to the conduit 144d.
The nozzle 142 comprises an eccentrically arranged outlet 142a so that the nozzle 142 is allowed to move relative to the holder 144 by means of a liquid dispensing force. The body 142b of the nozzle moves in the space 144c when conduit pressurized coolant L from the conduit 144d through the nozzle 142 142a so that the outlet 142a moves by the force thereby obtained so that the delivered coolant is distributed over different areas of the stator.
Fig. 3b schematically illustrates a coolant applicator 240 according to an embodiment of the present invention. The coolant applicator 240 includes a nozzle 242 and a holder 244.
According to this embodiment, the holder 244 is movably arranged relative to said stator. According to this embodiment, the holder 244 is movably attached to the housing 30.
In this case, the entire holder 244 is allowed to move relative to the housing 30. According to a variant, the nozzle 242 is fixedly connected to the holder 244. According to this embodiment, the entire coolant applicator 240, i.e. the nozzle 242 moves together with the holder 244.
During movement of the holder 244, the coolant L is distributed in different areas of the stator for cooling. Fig. 3c schematically illustrates a coolant applicator according to an embodiment of the present invention. The coolant applicator 340 includes a nozzle 342 and a holder 344.
The nozzle 342 is according to this embodiment movably arranged relative to said stator. According to this embodiment, the holder 344 is fixedly attached to the housing 30.
In this case, the nozzle 342 is allowed to move relative to the housing 30. The nozzle 342 is movably connected to the holder 344. According to this embodiment, the entire nozzle moves relative to the holder 344. The embodiment in Fig. 3a shows a variant thereof.
During movement of the holder nozzle, the coolant L is distributed in different areas of the stator for cooling.
Fig. 4 schematically illustrates a block diagram of a method for liquid cooling of an electric motor with a rotor and a stator.
According to one embodiment, the method for liquid cooling of such an electric motor comprises a method step S1. In this step, coolant is applied to said stator by means of at least one coolant applicator.
According to one embodiment, the method for liquid cooling of such an electric motor comprises a method step S2. In this step, during said application of the coolant L, said coolant applicator is caused to move relative to said stator so that the coolant L is applied to different areas of said stator by the movement of the coolant applicator.
According to one embodiment, the method comprises the step of dispensing said coolant by means of a nozzle supported by a holder for said nozzle.
According to one embodiment, the method comprises the step of dispensing liquid by means of said nozzle for effecting movement of the nozzle relative to said holder. According to an embodiment of the method, the step of dispensing liquid takes place by means of an eccentrically arranged outlet of the nozzle so that the nozzle is allowed to move relative to the holder by means of a force generated by liquid dispensing.
According to one embodiment, the method comprises the step of causing said holder to move relative to said stator during said application of the coolant L.
According to one embodiment, the method comprises the step of generating a force generated by liquid delivery for effecting said movement of the coolant applicator.
According to one embodiment of the method, the step of applying coolant to said stator comprises applying coolant to at least one end portion of said stator.
The above description of the preferred embodiments of the present invention has been provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the invention to the variations described. Obviously, many modifications and variations will occur to those skilled in the art. The embodiments have been selected and described to best explain the principles of the invention and its practical applications, thereby enabling one skilled in the art to understand the invention for various embodiments and with the various modifications appropriate to the intended use.

权利要求:
Claims (19)
[1]
Device for liquid cooling of an electric motor (1) with a rotor (10) and a stator (20), comprising at least one coolant applicator (40; 140; 240; 340) arranged to apply coolant to said stator (20), characterized by that said coolant applicator (40; 140; 240; 340) is movably arranged relative to said stator (20) so that the coolant (L) is applied to different areas of said stator (20) by the movement of the coolant applicator.
[2]
The device of claim 1, wherein said coolant applicator (40; 140; 240; 340) comprises a nozzle (42; 142; 242; 342) for dispensing said coolant and a holder (44; 144; 244; 344) for supporting said nozzle.
[3]
The device of claim 2, wherein said nozzle (42; 142; 342) is movably disposed relative to said holder (44; 144; 344).
[4]
Device according to claim 3, wherein said nozzle (142) comprises an eccentrically arranged outlet (142a) so that the nozzle is allowed to move relative to the holder (144) by means of a force generated by liquid delivery.
[5]
The device of claim 2, wherein said holder (244) is movably disposed relative to said stator.
[6]
Device according to any one of the preceding claims, wherein said movement of the coolant applicator (40; 140; 240; 340) is arranged to take place by means of a force generated by liquid delivery.
[7]
Device according to any one of the preceding claims, wherein said coolant applicator (40; 140; 240; 340) is supported by a housing (30) accommodating an electric motor.
[8]
The device of claim 7, wherein the coolant applicator (40) is supported by a gable portion (30a, 30b) of said housing (30). 10 15 20 25 18
[9]
Device according to any one of claims 1-6, wherein the coolant applicator (40) is supported by the rotor shaft (14) of said rotor (10).
[10]
Device according to any one of the preceding claims, wherein the coolant applicator is arranged to apply coolant at least to an end portion (22a, 22b) of said stator (20).
[11]
A method of liquid cooling an electric motor (1) with a rotor (10) and a stator (20), comprising the steps of: applying coolant to said stator (20) by means of at least one coolant applicator (40; 140; 240; 340), characterized in that during said application of the coolant (L) causing said coolant applicator (40; 140; 240; 340) to move relative to said stator (20) so that the coolant (L) is applied to different areas of said stator (20) by the movement of the coolant applicator ).
[12]
The method of claim 11, comprising the step of dispensing said coolant by means of a nozzle (42; 142; 242; 342) supported by a holder (44; 144; 244; 344) for said nozzle.
[13]
A method according to claim 12, comprising the step of dispensing liquid by means of said nozzle for effecting movement of the nozzle relative to said holder.
[14]
A method according to claim 13, wherein the step of dispensing liquid takes place by means of an eccentrically arranged outlet (142a) of the nozzle (142) so that the nozzle is allowed to move relative to the holder (144) by means of a force generated by liquid dispensing.
[15]
A method according to claim 12, comprising the step of causing said holder (244) to move relative to said stator during said application of the coolant (L).
[16]
A method according to any one of claims 11-15, comprising the step of generating a force generated by liquid delivery to effect said movement of the coolant applicator. 19
[17]
A method according to any one of claims 11-16, wherein the step of applying coolant to said stator (20) comprises applying coolant to at least one end portion (20a, 20b) of said stator.
[18]
Platform (P) comprising a device (I) according to any one of claims 1-10.
[19]
A platform according to claim 18, comprising a vehicle.

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JP2014023297A|2012-07-19|2014-02-03|Toyota Motor Corp|Structure for cooling rotary electric machine|

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JP5920308B2|2013-10-18|2016-05-18|株式会社デンソー|Rotating electric machine|JP2018511295A|2015-04-10|2018-04-19|ジーイー・アビエイション・システムズ・エルエルシー|Wet cavity electric machine|

法律状态:
2019-12-03| NUG| Patent has lapsed|

优先权:

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申请号 | 申请日 | 专利标题

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SE1550409A|SE538816C2|2015-04-02|2015-04-02|Apparatus and method for liquid cooling of an electric motor|SE1550409A| SE538816C2|2015-04-02|2015-04-02|Apparatus and method for liquid cooling of an electric motor|

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US15/559,740| US20180048215A1|2015-04-02|2016-03-24|Device and method for liquid cooling of an electric motor|

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AU2016241234A| AU2016241234A1|2015-04-02|2016-03-24|Device and method for liquid cooling of an electric motor|

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PCT/SE2016/050254| WO2016159862A1|2015-04-02|2016-03-24|Device and method for liquid cooling of an electric motor|

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EP16773569.5A| EP3278429A4|2015-04-02|2016-03-24|Device and method for liquid cooling of an electric motor|