WO2005099070A1 - Dispositif de refroidissement destine a une machine electrique pouvant etre refroidie au moyen d'un liquide de refroidissement - Google Patents

Dispositif de refroidissement destine a une machine electrique pouvant etre refroidie au moyen d'un liquide de refroidissement Download PDF

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Publication number
WO2005099070A1
WO2005099070A1 PCT/EP2005/051533 EP2005051533W WO2005099070A1 WO 2005099070 A1 WO2005099070 A1 WO 2005099070A1 EP 2005051533 W EP2005051533 W EP 2005051533W WO 2005099070 A1 WO2005099070 A1 WO 2005099070A1
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WO
WIPO (PCT)
Prior art keywords
rotor
electrical machine
cooling liquid
cooling
cooling device
Prior art date
Application number
PCT/EP2005/051533
Other languages
German (de)
English (en)
Inventor
Nicolai Tarasinski
Joachim Sobotzik
Bernd Kneer
Klaus Hahn
Mattias Lang
Original Assignee
Deere & Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from EP04101458A external-priority patent/EP1466773B1/fr
Priority claimed from DE102004049795A external-priority patent/DE102004049795A1/de
Application filed by Deere & Company filed Critical Deere & Company
Publication of WO2005099070A1 publication Critical patent/WO2005099070A1/fr

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Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Definitions

  • Cooling device for an electrical machine that can be cooled with a coolant
  • the present invention relates to a cooling device for an electrical machine that can be cooled with a cooling liquid.
  • the cooling device comprises a feed device with which coolant can be fed to the electrical machine.
  • the electrical machine has a stator and a rotor having an axis of rotation.
  • the present invention relates to an electrical machine which can be cooled with a cooling liquid.
  • the present invention is therefore based on the object of specifying and developing a cooling device for an electrical machine which can be cooled with a coolant and an electrical machine, by means of which the aforementioned problems are overcome.
  • intensive cooling of the electrical components of the electrical machine should be possible, the measures for cooling not ' substantially reducing the efficiency of the electrical machine or should not be at the expense of the installation space of the electrical machine.
  • a cooling device of the type mentioned at the outset is characterized in that cooling liquid can be conducted to a first region of the rotor of the electrical machine and brought into contact with the rotor with the supply device.
  • cooling liquid can be conducted to a first region of the rotor of the electrical machine and brought into contact with the rotor with the supply device.
  • the coolant passes from the first region of the rotor to a second region of the rotor due to centrifugal forces acting on the coolant.
  • the distance of the second area from the axis of rotation is greater than the distance of the first area from the axis of rotation.
  • the cooling liquid brought into contact with the rotor is thrown outwards due to the rotation of the rotor and the centrifugal forces associated therewith. This results in a defined distribution of the coolant within the electrical machine.
  • the cooling effect results in particular from the fact that the cooling liquid is brought into contact with the heated or heated electrical components or that the cooling liquid acts upon or flows around it. So is on the one hand, the rotor can be cooled in this way, and on the other hand, the stator can also be cooled as a result.
  • a suitable supply of the cooling liquid to a first region of the rotor of the electrical machine is required, the first region being arranged closer to the axis than the second region of the rotor.
  • the cooling liquid - with respect to the axis of rotation - is fed to the rotor further inside, so that due to the centrifugal forces acting, the cooling liquid is flung outwards - to the second area of the rotor and / or beyond the second area of the rotor.
  • the coolant level in the electrical machine may be kept at a level which, in the operating state, is in any case below the outermost region of the rotor. In principle, this could be achieved in that an overpressure is generated within the electrical machine with the aid of a second medium - for example air - which forces the coolant already supplied to the electrical machine through a corresponding coolant return or discharge device from the electrical machine.
  • the electrical machine could have a gas or air supply line through which gas or air can be supplied to the electrical machine at a predeterminable pressure.
  • the feed device could also have a mixing device with which a gas, preferably air, can be mixed with the cooling liquid.
  • a gas preferably air
  • both the cooling liquid for cooling the electrical machine and the gas or air for producing the excess pressure are supplied to the electrical machine using the feed device.
  • the cooling liquid and gas could be mixed according to the principle of the suction jet pump.
  • the mixing device has a feed line which has a nozzle-shaped end.
  • a further cooling liquid line could be arranged opposite this nozzle, which takes up the cooling liquid emerging from the nozzle of the supply line and supplies it to the electrical machine.
  • the mixing device is designed in such a way that, when the cooling liquid passes from the supply line to the cooling liquid line, the cooling liquid also absorbs gas or air from the environment in the mixing device - in accordance with the principle of the suction jet pump - so that with such a mixing device designed the cooling liquid can be easily constructive means a gas can be mixed.
  • the feed device could have a cooling liquid pump.
  • the relationship between the cooling liquid and gas can be set in connection with the mixing device, or, for example at an elevated temperature of one or more components of the electrical machine, the amount of the cooling liquid used to cool these components can be increased if the delivery rate of the coolant is increased per time interval with the coolant pump.
  • the feed device could have a valve arrangement with which the pressurized coolant or from an existing coolant volume flow can vary the quantity of coolant delivered to the electrical machine per time interval.
  • a valve could be provided with which the effective cross section of the cooling liquid flowing through the valve can be varied and / or with which the pressure of the supplied cooling liquid can be set.
  • the location or locations of the electrical machine to which the coolant is to be applied will depend on the specific design of the electrical machine. If, for example, an internal rotor is essentially cylindrical, it could be provided to supply the cooling liquid to at least one end face of the rotor with the supply device. Specifically, the feed device could have, for example, a commercially available hydraulic pipe, possibly with a nozzle-shaped end. As a result, the coolant comes into contact with the end face of the rotor, therefore cools the rotor from the end face and the coolant is thrown outward by the rotating rotor.
  • the rotor could also be designed in such a way that the cooling liquid can be conducted to or into an inner region of the rotor with the feed device, for example by means of a hollow shaft or hollow axis of the rotor. From there, the cooling fluid inside the rotor is thrown outwards due to the centrifugal forces, so that the rotor is practically cooled from the inside.
  • the rotor has at least one passage through which the cooling liquid can be conducted from the first region of the rotor to a second region of the rotor.
  • the passage could be arranged to run essentially in the radial direction.
  • the passage could have a slot, a groove and / or a bore.
  • a plurality of passages are preferably provided on the rotor, which are arranged uniformly distributed along the circumference, as a result of which a uniform cooling effect can be achieved.
  • a passage could have a meandering or curved course.
  • a plurality of passages could have a honeycomb-shaped or an interconnected course. The effective surface area between the rotor and the cooling liquid can thus be increased, so that an optimal cooling effect is possible.
  • the number, size and / or course of the passages are preferably dimensioned and arranged in such a way that the cooling liquid and possibly the gas underneath heat transfer between the rotor and coolant from the first region of the rotor to a second region of the rotor is as high as possible.
  • the number, size and / or course of the passages are dimensioned and arranged in such a way that the cooling effect of the cooling liquid and, if necessary, the gas can be set to a predeterminable ratio of the cooling effect between the rotor and the stator. It could be provided that almost only the stator is cooled by the cooling liquid.
  • the passages could as well be dimensioned or arranged such that the stator and the rotor are cooled in equal proportions.
  • At least one means is provided which is used to guide the cooling liquid from the first region of the rotor to a second region of the rotor.
  • This means is preferably arranged on the rotor.
  • the means could have at least one laterally arranged disc, a collecting ring and / or several blades or blades.
  • blades could be provided on the rotor, with which the cooling liquid can be conducted from the inside to the outside on an outer region of the rotor.
  • corresponding means for guiding the cooling liquid could be provided on the housing of the electrical machine, so that a cooling liquid pump can ultimately be implemented in cooperation with means arranged on the rotor.
  • the rotor can be used to spin cooling liquid in the direction of the stator of the electrical machine.
  • the stator can also be cooled, and this can be done in a very particularly advantageous manner in a targeted manner, in that the passages provided on the rotor and / or the provided means for guiding the cooling liquid are designed such that, for example, winding heads or other components of the stator are specifically provided with cooling liquid are applied, so that mainly the components of the stator can be cooled, in which the greatest heat is generated.
  • the passage and / or the means is designed such that the cooling liquid can be thrown at a predeterminable angle to the tangent of the rotor to the stator.
  • means for guiding the cooling liquid on the rotor could be provided, which are designed to be comparable to those of a centrifugal pump fan with backward-curved blades.
  • the rotor of the electrical machine could be at least partially in the form of a hollow rotor.
  • a gear component for example a mixing gear, could be arranged within the hollow rotor, as is the case, for example, in the European patent application with the application number 04101458.0-1523, the entire disclosure content of which is included here.
  • a discharge device for removing the cooling liquid supplied to the electrical machine.
  • a discharge device could be provided in a lower area of the electrical machine.
  • the coolant discharged by the electrical machine could, for example, be conductive to a coolant cooler, so that a coolant circuit is implemented.
  • the electrical machine could be provided for a tractor, the electrical machine being able to be cooled with the gear oil of a gear of the tractor.
  • the cooling circuit could be designed in such a way that the gear oil first through the electrical machine, then through the gear and then through a gear oil cooler - e.g. pumped by a gear oil pump - is directed.
  • a control or regulating means is provided with which the coolant level in the electrical machine can be adjusted.
  • the coolant level is controlled or regulated in such a way that it is always below or outside the rotor during operation of the electrical machine, so that the rotor is not brought into contact with the coolant arranged in the lower region of the electrical machine.
  • the Control or regulating means could be able to control or regulate both the amount of the coolant supplied to the electrical machine and the amount of coolant discharged from the electrical machine, for example with the aid of one or more coolant pumps.
  • the control or regulating means allows the gas pressure - that is to say a medium other than that of the cooling liquid - to be controlled or regulated within the electrical machine.
  • a gas or air pump could be provided with which the gas pressure within the electrical machine can be set, for example via a separate gas supply.
  • an electrically conductive liquid could be used as the cooling liquid.
  • all of the assemblies of the electrical machine that come into contact with the coolant would have to be designed in an isolated manner.
  • the electrical machine with a cooling device according to the invention can be produced more cost-effectively if the cooling liquid is not electrically conductive. In this case, not all assemblies of the electrical machine that come into contact with the cooling liquid need to be designed to be electrically insulating. Oil is preferably used as the cooling liquid, in particular gear oil, which is not electrically conductive.
  • the Coolant can also be used to lubricate the bearing of the rotor.
  • a coolant must be used that also has lubricating properties, for example gear oil. Accordingly, the coolant is also to be suitably supplied to the bearing.
  • an electrical machine has a stator and a rotor having an axis of rotation.
  • the electrical machine can be cooled with a cooling liquid with the aid of a cooling device according to one of the claims 1 to 20.
  • the electrical machine according to claim 21 includes a feed device with which coolant can be fed to the electrical machine.
  • the cooling liquid can be supplied to a first region of the rotor of the electrical machine with the supply device and can be brought into contact with the rotor. When the rotor rotates, the cooling liquid passes from the first region of the rotor to a second region of the rotor.
  • the distance of the second area from the axis of rotation is greater than the distance of the first area from the axis of rotation.
  • the electrical machine is designed in the form of an asynchronous machine. Accordingly, the rotor has at least one, preferably two short-circuit rings.
  • the electrical machine could be designed such that it can be operated as a motor and / or as a generator and thus provides mechanical torque or electrical energy.
  • the electrical machine very particularly preferably has an internal rotor, so that the cooling liquid brought into contact with the rotor can be thrown outwards, where the stator of the electrical machine is preferably arranged, among other things.
  • FIG. 1 in a cross-sectional view of a first embodiment of the present invention
  • FIG. 1 shows a schematic cross-sectional view of an electrical machine 10 which is designed in the form of an asynchronous machine.
  • the electrical machine 10 comprises a stator 12, which is fixed to the housing 14 of the electrical machine 12.
  • the stator 12 has two winding heads 16, 18 which are spatially separated from one another and which are each arranged in a ring shape in the housing 14 of the electrical machine 10.
  • the electrical machine 10 further comprises a rotor 20, which rotates by one Rotation axis 22 is rotatably mounted.
  • bearings 24, 26 are provided on both sides of the electrical machine 10.
  • the rotor 20 is essentially cylindrical and has a shaft 28 and a left and a right end face 30, 32.
  • Short-circuit rings 34, 36 are provided on the end faces 30, 32 of the rotor 20, each of which is arranged essentially at the same height as the end windings 16, 18 in the axial direction with respect to the axis of rotation 22.
  • the rotor 20 has the short-circuit bars, not shown in FIG. 1, which in the outer region of the rotor 20 each extend from the left short-circuit ring 34 to the right short-circuit ring 36.
  • the electrical machine 10 can be cooled with a cooling liquid 38.
  • a feed device 40, 42 is provided, with which cooling liquid 38 can be conducted to a first region 44, 46 of the rotor 20 of the electrical machine and can be brought into contact with the rotor 20 - specifically with the respective end faces 30, 32.
  • the cooling liquid 38 is conducted from the first area 44, 46 of the rotor 20 to a second area 48, 50 of the rotor 20 due to the centrifugal forces acting on the cooling liquid 38.
  • the feed device 40 or 42 each has a hydraulic tube with which pressurized cooling liquid 38 is sprayed onto the end face 30 or 32 of the rotor 20, respectively.
  • cooling liquid 38 supplied to the first area 44, 46 of the rotor 20 reaches the second area 48, 50 through passages 52, 54 provided on the short-circuit rings 34, 36.
  • the rotor 20 is intensively cooled from its end faces 30, 32 and at the short-circuit rings 34, 36.
  • the cooling liquid 38 which has passed through the passages 52, 54 is thrown outwards by the rotor 20, so that the latter Coolant 38 strikes the end windings 16, 18 directly, whereby the end windings 16, 18 are also intensively cooled.
  • the coolant liquid 38 thrown outwards runs along the inside of the housing 14 of the electrical machine 10 and is collected in a lower area in a coolant sump 56.
  • the coolant sump 56 has a level 58, which is in any case below the rotor 20.
  • a discharge device To discharge the cooling liquid 38, a discharge device is provided, which has a pipeline 60 which, at a lower region of the housing 14 of the electrical machine 10, conducts the cooling liquid 38 to a cooling liquid cooler, not shown in the figures.
  • the electrical machine 10 has an air supply 62, with which pressurized air can be supplied to the electrical machine 10. The air supplied to the electrical machine 10 can be used on the one hand to cool the electrical machine 10.
  • the air supplied to the electrical machine 10 preferably serves to keep the coolant level 58 of the coolant sump 56 at a level which is in any case spaced apart from the lower outer regions 48, 50 of the rotor 20, so that the coolant 38 does not coexist in the coolant sump 56 comes into contact with the rotating rotor 20 and thus no splashing losses occur in the electrical machine 10.
  • a level control of the coolant sump 56 is provided by regulating the amount of coolant supplied to the electrical machine 10 and the air supplied to the electrical machine 10 such that the coolant level 58 does not exceed a predeterminable upper value.
  • a liquid level sensor 64 could be provided, which detects the currently existing coolant level 58 or an exceeding of a predeterminable coolant level and supplies it to a control or regulating device.
  • the cooling liquid 38 could be fed to the rotor 20 through the shaft 28, with bores in the shaft 28, through which, not shown, being provided in a region of the end faces 30, 32 the coolant 38 could exit the shaft near the axis of rotation 22. This would allow a coolant flow to be realized in a manner comparable to that shown in FIG. 1, in which both the end faces 30, 32 and the short-circuit rings 34, 36 of the rotor 20 could be cooled by the coolant 38.
  • FIGS. 2 to 5 each show in a perspective view different embodiments of a component 66 which has the short-circuit ring 34 or which can be mounted on the short-circuit ring 34.
  • the component 66 from FIG. 2 has a bore 68 through which the shaft 28 of the rotor 20 runs.
  • Component 66 further includes short-circuit ring 34 and a disk-shaped region 70, to which short-circuit ring 34 is connected.
  • the inside diameter of the short-circuit ring 34 is larger than the inside diameter of the disk 72 arranged on the end face of the short-circuit ring 34.
  • the disk-shaped area 70 which (also in FIGS.
  • FIG. 3 shows a component 66 which is essentially in the form of an annular disk 74 and which has a recess 76 in its center. The shaft 28 of the rotor 20 runs through this recess 76.
  • Holes 78 are provided near the outer edge of the annular disk 74 at the same distance in each case and are used to fasten the annular disk 74 to the short-circuit ring 34 (not shown in FIG. 3). Also close to the outer edge of the annular disk 74 are recessed areas 80, which each form a groove-shaped and radial passage in the case of an annular disk 74 mounted on the short-circuit ring 34, through which coolant 38 can escape to the outside. Accordingly, the areas in which the bores 78 are provided are arranged higher than the areas 80 in the axial direction.
  • FIG. 4 shows a component 66 that is comparable to FIG. 3, wherein instead of the recessed areas 80, groove-shaped depressions 82 are now provided.
  • the groove-shaped depressions 82 each run from the inside to the outside, the groove-shaped depressions 82 intersecting and thus being connected to one another. They are oriented in such a way that for the two opposite directions of rotation of the rotor 20, the cooling liquid 38 is in each case essentially thrown outward at an angle of approximately 45 degrees, measured to the tangent.
  • the circular ring disks 74 shown in FIGS. 3 and 4 are mounted on the short-circuit ring with the end face visible in each of these figures.
  • FIG. 5 shows a short-circuit ring 34, on which an annular disk 74 is mounted, which has wings 84.
  • These vanes 84 are oriented essentially in the radial direction, protrude from the annular disk 74 in the axial direction and are arranged at the same distance along the circumference on the component 66.
  • Such components are available on the market - ⁇ for air cooling - so that advantageously one inexpensive manufacture is possible.
  • the cooling liquid 38 is sprayed onto the disk-shaped region 70 of the component 66 with the aid of the feed device 40 and is then thrown outwards and between the vanes 84 due to the centrifugal forces during the rotation of the rotor 20.
  • FIG. 6 shows a perspective illustration of the component 66, which has the short-circuit ring 34 with the disk-shaped region 70 and the bore 68 through which the shaft 28 of the rotor runs.
  • Both the short-circuit ring 34 and the circular ring disk 74 each have bores 78 which are aligned with one another and through which the circular ring disk 74 can be fastened to the short-circuit ring 34 using suitable fastening means.
  • FIG. 6 shows the region 74 particularly clearly, in which the cooling liquid 38 thrown radially outwards is first collected before it can pass through the passages not shown in FIG. 6 to the outside.
  • the surface of the disk-shaped region 70 that can be seen in FIG. 6 ultimately forms the end face or an outer surface of the rotor 20.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un dispositif de refroidissement destiné à une machine électrique (10) pouvant être refroidie au moyen d'un liquide de refroidissement. Ledit dispositif de refroidissement comporte un système d'alimentation (40, 42) permettant d'acheminer du liquide de refroidissement (38) vers la machine électrique (10). La machine électrique (10) comporte un stator (12) et un rotor (20) présentant un axe de rotation (22). Le système d'alimentation (40, 42) du dispositif de refroidissement selon l'invention permet de guider du liquide de refroidissement (38) vers une première zone (44, 46) du rotor (20) de la machine électrique (10) et d'amener celui-ci en contact avec le rotor (20). Lors de la rotation du rotor (20), le liquide de refroidissement (38) s'écoule de la première zone (44, 46) du rotor (20) vers une deuxième zone (48, 50) du rotor (20). L'écart entre la deuxième zone (48, 50) et l'axe de rotation (22) est supérieur à l'écart entre la première zone (44, 46) et l'axe de rotation (22). L'invention concerne également une machine électrique (10) pouvant être refroidie au moyen d'un liquide de refroidissement (38).
PCT/EP2005/051533 2004-04-08 2005-04-06 Dispositif de refroidissement destine a une machine electrique pouvant etre refroidie au moyen d'un liquide de refroidissement WO2005099070A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP04101458A EP1466773B1 (fr) 2003-04-08 2004-04-08 Dispositif d'entrainement pour équipements auxiliaires
EP04101458.0 2004-04-08
DE102004049795A DE102004049795A1 (de) 2004-04-08 2004-10-12 Kühlvorrichtung für eine mit einer Kühlflüssigkeit kühlbaren elektrischen Maschine
DE102004049795.8 2004-10-12

Publications (1)

Publication Number Publication Date
WO2005099070A1 true WO2005099070A1 (fr) 2005-10-20

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PCT/EP2005/051533 WO2005099070A1 (fr) 2004-04-08 2005-04-06 Dispositif de refroidissement destine a une machine electrique pouvant etre refroidie au moyen d'un liquide de refroidissement

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007064394A1 (fr) * 2005-11-30 2007-06-07 Caterpillar Inc. Machine electrique equipee d’un rotor refroidi par un liquide
WO2012027278A2 (fr) * 2010-08-23 2012-03-01 Remy Technologies, L.L.C. Pompe centrifuge du style à disque
FR3033098A1 (fr) * 2015-02-19 2016-08-26 Valeo Equip Electr Moteur Machine electrique tournante a refroidissement optimise
EP2518869A3 (fr) * 2011-04-27 2016-10-05 LG Electronics Inc. Moteur électrique et véhicule électrique en comportant un tel moteur
WO2018095842A1 (fr) * 2016-11-25 2018-05-31 Renault Sas Machine électrique synchrone a rotor bobiné
FR3076672A1 (fr) * 2018-01-11 2019-07-12 Renault S.A.S Couronne d'equilibrage de rotor realisee en fonderie
WO2022036517A1 (fr) * 2020-08-17 2022-02-24 华为数字能源技术有限公司 Élément conducteur, structure conductrice refroidie par liquide, moteur et bloc d'alimentation de voiture électrique
US11750059B2 (en) 2020-02-07 2023-09-05 Deere & Company End shield with spray feature
US11780000B2 (en) 2020-04-29 2023-10-10 Deere & Company Method of forming parallel spiral channels in housing to be formed by casting or molding process
US11873826B2 (en) 2021-02-26 2024-01-16 Deere & Company Cooling arrangement for electric machines

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EP1215418A1 (fr) * 2000-12-18 2002-06-19 General Motors Corporation Système de lubrification et de refroidissement pour unités de reception et délivrance de puissance dans une transmission électro-mécanique de véhicule

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007064394A1 (fr) * 2005-11-30 2007-06-07 Caterpillar Inc. Machine electrique equipee d’un rotor refroidi par un liquide
WO2012027278A2 (fr) * 2010-08-23 2012-03-01 Remy Technologies, L.L.C. Pompe centrifuge du style à disque
WO2012027278A3 (fr) * 2010-08-23 2012-05-10 Remy Technologies, L.L.C. Pompe centrifuge du style à disque
US8432074B2 (en) 2010-08-23 2013-04-30 Remy Technologies, L.L.C. Disk style centrifugal pump
EP2518869A3 (fr) * 2011-04-27 2016-10-05 LG Electronics Inc. Moteur électrique et véhicule électrique en comportant un tel moteur
FR3033098A1 (fr) * 2015-02-19 2016-08-26 Valeo Equip Electr Moteur Machine electrique tournante a refroidissement optimise
CN110050404A (zh) * 2016-11-25 2019-07-23 雷诺股份公司 绕线转子同步电机
WO2018095842A1 (fr) * 2016-11-25 2018-05-31 Renault Sas Machine électrique synchrone a rotor bobiné
FR3059487A1 (fr) * 2016-11-25 2018-06-01 Renault S.A.S Machine electrique synchrone a rotor bobine.
RU2713419C1 (ru) * 2016-11-25 2020-02-05 Рено Сас Синхронная электрическая машина с намотанным ротором
FR3076672A1 (fr) * 2018-01-11 2019-07-12 Renault S.A.S Couronne d'equilibrage de rotor realisee en fonderie
WO2019137738A1 (fr) * 2018-01-11 2019-07-18 Renault S.A.S Couronne d'équilibrage de rotor réalisée en fonderie
US11750059B2 (en) 2020-02-07 2023-09-05 Deere & Company End shield with spray feature
US11780000B2 (en) 2020-04-29 2023-10-10 Deere & Company Method of forming parallel spiral channels in housing to be formed by casting or molding process
WO2022036517A1 (fr) * 2020-08-17 2022-02-24 华为数字能源技术有限公司 Élément conducteur, structure conductrice refroidie par liquide, moteur et bloc d'alimentation de voiture électrique
US11873826B2 (en) 2021-02-26 2024-01-16 Deere & Company Cooling arrangement for electric machines

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