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WO2017162362A1 - Dispositif d'entraînement comprenant une machine électrique et un dispositif de refroidissement par aspersion pour refroidir la machine électrique - Google Patents

Dispositif d'entraînement comprenant une machine électrique et un dispositif de refroidissement par aspersion pour refroidir la machine électrique Download PDF

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Publication number
WO2017162362A1
WO2017162362A1 PCT/EP2017/052842 EP2017052842W WO2017162362A1 WO 2017162362 A1 WO2017162362 A1 WO 2017162362A1 EP 2017052842 W EP2017052842 W EP 2017052842W WO 2017162362 A1 WO2017162362 A1 WO 2017162362A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric machine
refrigerant
rotor
housing
stator
Prior art date
Application number
PCT/EP2017/052842
Other languages
German (de)
English (en)
Inventor
Alexander LICHTENBERGER
Jörg REITER-JÄGER
Johannes Winklinger
Original Assignee
Magna powertrain gmbh & co kg
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
Application filed by Magna powertrain gmbh & co kg filed Critical Magna powertrain gmbh & co kg
Publication of WO2017162362A1 publication Critical patent/WO2017162362A1/fr

Links

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
    • H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing

Definitions

  • the present invention relates to a drive assembly for a motor vehicle comprising an electric machine with a stator and a rotor, wherein the stator and the rotor are arranged in an interior of a housing, and a Sprühkühlan whatsoever, wherein by means of the Sprühkühlan whatsoever in a cooling operation of the stator and / or the rotor of the electric machine are at least partially coolable by spraying with a liquid refrigerant, wherein during the cooling operation, the liquid refrigerant at the stator and / or the rotor of the electric machine at least partially evaporated and wherein the gaseous refrigerant and / or the liquid refrigerant over at least a first line from the interior of the housing can be discharged.
  • Drive arrangements of the type mentioned find application in a wide variety of vehicle configurations, with the electric machine of such a drive arrangement being or can only be operated at certain operating temperature limits, depending on the configuration.
  • Electric machines include a fixed stator and a movable rotor, wherein the rotor is mounted in the most common type of electrical machine rotatably within a ring-shaped stator.
  • the stator has a stator core and at least one arranged on the stator core Stator winding on.
  • the rotor may comprise a rotor core and at least one rotor winding arranged on the rotor core.
  • Electric machines generate heat due to the dielectric loss during their operation.
  • the region of the stator winding and / or the rotor winding in particular in the region of the respective winding heads, there is a strong evolution of heat.
  • the result of this strong heating is an increase in the dielectric loss factor - even more electrical energy is converted into heat, which on the one hand causes a deterioration of the efficiency of the electric machine and on the other hand adversely affects a reliable operation of the electrical machine over its lifetime. Therefore, a cooling device is generally provided in drive assemblies with electric machines, which cools the parts to be cooled of the electric machine.
  • Coolant circulates, for example, in a housing of the electric machine or in a rotor shaft designed as a hollow shaft, on which the rotor of the electric machine is arranged. Due to its heat capacity, the liquid coolant absorbs the heat and transports it away.
  • These solutions usually take place at a great distance from the heat source and require heat conduction through the rotor core and / or the stator core in order to dissipate the waste heat into the cooling circuit. By means of this diffuse heat conduction often adjacent parts such as bearings, seals, etc. are heated and thus thermally stressed.
  • cooling devices are also known which effect cooling of surfaces to be cooled of an electrical machine due to the evaporation of a coolant.
  • the coolant is vaporized at the surface to be cooled and then recondensed again.
  • US Pat. No. 7,397,154 B2 discloses a spray-cooled engine system having a motor housing with an interior space and an exterior space, wherein the stator and the rotor are arranged in the interior of the housing.
  • the engine system has a multiplicity of atomizers, which are designed in such a way that at least the stator and the rotor are sprayed by the atomizer.
  • the disclosed engine system includes a coolant pump which communicates with the atomizers and supplies the atomizers with coolant.
  • the coolant is, for example, a dielectric fluid that evaporates on the surfaces to be cooled of the stator and the rotor.
  • the recondensation of the coolant takes place on the housing inner wall of the housing. In this case, however, the heat dissipation by the coolant is severely limited.
  • a drive arrangement for a motor vehicle comprising an electric machine with a stator and a rotor, wherein the stator and the rotor are arranged in an interior of a housing, and a Sprühkühlan whatsoever, wherein by means of the Sprühkühlan whatsoever in a cooling operation of the stator and / or the rotor of the electric machine by spraying with a liquid refrigerant are at least partially coolable, wherein during the cooling operation, the liquid refrigerant at the stator and / or the rotor of the electric machine at least partially evaporated and wherein the gaseous refrigerant and / or the liquid refrigerant be discharged via at least a first line from the interior of the housing, wherein in the first Line a first control valve is arranged, wherein via the first control valve, the vapor pressure in the interior of the housing is adjustable.
  • the electric machine comprises a stator, a rotor and a housing, wherein the stator and the rotor are arranged in an inner space of the housing.
  • the electric machine more precisely the stator and / or the rotor of the electric machine, can be cooled at least partially in a cooling operation of the drive arrangement by means of the spray cooling arrangement.
  • the cooling of the stator and / or rotor takes place by means of at least partial spraying of the surfaces to be cooled of the stator and / or rotor with a liquid refrigerant.
  • the liquid refrigerant evaporates at least partially on the surfaces to be cooled of the stator and / or rotor - it forms a first phase, namely gaseous refrigerant, and / or a second phase, namely liquid refrigerant.
  • the gaseous refrigerant and / or the liquid refrigerant can be discharged from the interior of the housing via at least one first line.
  • a first control valve is arranged, wherein the vapor pressure in the interior of the housing can be regulated via the first control valve.
  • the evaporation of the refrigerant ensures a homogeneous temperature of the surfaces to be cooled.
  • the refrigerant heats up on the surfaces of the electric machine to be cooled until the start of vaporization-dependent evaporation on the surface to be cooled, leading on the one hand to the boiling temperature by means of warming up and another. on the other hand by the latent heat of evaporation heat from the surface to be cooled of the electric machine.
  • the vapor pressure can be adjusted by the first control valve.
  • the surface temperature of the component of the electric machine to be cooled can thus be adjusted via the vapor pressure in the interior of the housing of the electric machine and a performance-optimized operation of the drive arrangement is ensured.
  • the spray cooling arrangement preferably comprises a refrigerant tank for holding the liquid refrigerant, a refrigerant pump, at least one spray unit and a condenser. Via the refrigerant pump, the liquid refrigerant from the refrigerant tank to the spray unit is conveyed.
  • the refrigerant pump is preferably designed as a controllable pump. In this way, it is possible to control the amount of liquid refrigerant to be delivered and thus to positively influence the efficiency of the spray cooling arrangement.
  • the condenser is preferably connectable on the input side via the first line and the first control valve to the interior of the housing of the electric machine such that during the cooling operation gaseous refrigerant and / or liquid refrigerant can flow from the interior of the housing into the condenser.
  • the capacitor is connected on the output side to the refrigerant tank.
  • the refrigerant tank is connectable via a second line and a second valve to the interior of the housing of the electric machine, so that during the cooling operation liquid refrigerant can flow from the interior of the housing directly into the refrigerant tank.
  • the second conduit opens with respect to the installation position of the drive assembly, starting from a deepest portion of the housing in the refrigerant tank.
  • the second line By forming the second line with the second control valve, in particular by the fact that the second line opens with respect to the installation position of the drive assembly of the deepest portion in the refrigerant tank, a particularly reliable outflow of the liquid refrigerant from the interior of the housing is ensured and a Splashing of the stator and / or rotor in the liquid refrigerant and thus a loss of power of the electric machine by splashing losses prevented.
  • the refrigerant is preferably an electrically non-conductive liquid having a boiling point at ambient pressure between 60 ° C and 100 ° C, in particular between 60 ° C and 80 ° C.
  • the drive assembly can be operated optimized performance.
  • the use of the capacitor requires a particularly efficient recondensation of the gaseous refrigerant and an optimized heat dissipation from the interior of the housing.
  • Fig. Shows a schematic representation of an exemplary
  • the exemplary drive arrangement 1 illustrated in FIG. 1 includes an electric machine 2 and a spray cooling arrangement 7.
  • the electric machine 2 has a housing 6, a stator 3 and a rotor 4.
  • the stator 3 and the rotor 4 are arranged in an inner space 5 of the housing 6, wherein the stator 3 is annular and the outer circumference of the rotor 4 surrounds.
  • a reverse arrangement namely an arrangement in which the rotor 4 is annular and surrounding the stator 3 on the outside, is also conceivable.
  • the rotor 4 is fixedly arranged on a rotor shaft 19.
  • the rotor shaft 19 is guided through an opening of the housing 6 from the interior 5 of the housing 6.
  • the stator 3 has a stator core 20 and a stator winding 21.
  • the rotor 4 has a rotor core 22 and a rotor winding 23.
  • the Sprühkühlan extract 7 comprises a refrigerant tank 13 with liquid refrigerant, a refrigerant pump 10, a filter element 17, two spray units 1 1 and a condenser 12.
  • the filter element 17 is disposed between the refrigerant pump 10 and the two spray units 1 1 and prevents the finest impurities in the Refrigerants get to the spray nozzles and clog them.
  • An arrangement of the filter element 17 between the refrigerant tank 13 and the refrigerant pump 10 is also conceivable.
  • the head of the stator winding 21 and the head of the rotor winding 23 are cooled.
  • the cooling is carried out by liquid refrigerant from the refrigerant tank 13 via the refrigerant pump 10 to the two spray units 1 1 is promoted.
  • the spray units 1 like the stator 3 and the rotor 4, are arranged in the interior 5 of the housing 6 of the electric machine 2.
  • the liquid refrigerant is atomized.
  • the spray units 1 1 are designed such that the surfaces to be cooled of the stator 3 and the rotor 4 are sprayed flat with liquid, atomized refrigerant - such a thin refrigerant film is continuously applied to the head of the stator winding 21 and the head of the rotor winding 23.
  • the liquid refrigerant at least partially vaporizes on the surface to be cooled of the stator 3 and on the surface of the rotor 4 to be cooled, and gaseous refrigerant is formed and, depending on the degree of evaporation, liquid refrigerant is also formed.
  • the gaseous refrigerant rises within the interior 5 of the housing 6 of the electric machine 2 substantially in the direction of a highest portion 18 of the housing 6.
  • the non-evaporated, liquid refrigerant drips from the surfaces to be cooled of the stator 3 and the rotor 4 in a deepest portion 16 of the housing 6 of the electric machine. 2
  • the interior 5 of the housing 6 of the electric machine 2 is in the present embodiment via a first line 8 and a first control valve 9 on the input side connected to the capacitor 9.
  • the first line 8 opens in the present example with respect to the installation position of the drive assembly 1, starting from the highest portion 18 of the housing 6 in the condenser 12.
  • About the first line 13 can during the cooling operation gaseous refrigerant from the interior 5 of the housing 6 in to flow the capacitor 12.
  • the interior 5 of the housing 6 of the electric machine 2 via a second line 14 and a second control valve 15 to the refrigerant tank 13 is connectable.
  • the second line 14 opens in relation to the installation position of the drive assembly 1, starting from the deepest portion 16 of the housing 6 in the refrigerant tank 13. Via the second line 14, during the cooling operation, liquid refrigerant can flow from the interior 5 of the housing 6 into the refrigerant tank 13 ,
  • the condenser 9 is connected on the output side to the refrigerant tank 8.

Landscapes

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

Abstract

L'invention concerne un dispositif d'entraînement (1), destiné à un véhicule automobile (2), comprenant une machine électrique équipée d'un stator (3) et d'un rotor (4), le stator (3) et le rotor (4) étant disposés dans l'espace intérieur (5) d'un boîtier (6), et un dispositif de refroidissement par aspersion (7). En mode de refroidissement, le stator (3) et/ou le rotor (4) de la machine électrique (2) sont au moins partiellement refroidis par pulvérisation par un réfrigérant liquide au moyen du dispositif de refroidissement par aspersion (7). Pendant l'opération de refroidissement, le réfrigérant liquide est vaporisé au moins partiellement au niveau du stator (3) et/ou du rotor (4) de la machine électrique (2) et le réfrigérant gazeux et/ou le réfrigérant liquide peuvent être évacués de l'espace intérieur (5) du boîtier (6) par l'intermédiaire d'au moins un premier conduit (8). L'invention est caractérisée en ce qu'une première vanne de régulation (9) est disposée dans le premier conduit (8), la pression de vapeur dans l'espace intérieur (5) du boîtier (6) étant réglable par l'intermédiaire de la première vanne de régulation (9).
PCT/EP2017/052842 2016-03-24 2017-02-09 Dispositif d'entraînement comprenant une machine électrique et un dispositif de refroidissement par aspersion pour refroidir la machine électrique WO2017162362A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016204959.3 2016-03-24
DE102016204959.3A DE102016204959B4 (de) 2016-03-24 2016-03-24 Antriebsanordnung mit einer elektrischen Maschine und einer Sprühkühlanordnung zur Kühlung der elektrischen Maschine

Publications (1)

Publication Number Publication Date
WO2017162362A1 true WO2017162362A1 (fr) 2017-09-28

Family

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Family Applications (1)

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PCT/EP2017/052842 WO2017162362A1 (fr) 2016-03-24 2017-02-09 Dispositif d'entraînement comprenant une machine électrique et un dispositif de refroidissement par aspersion pour refroidir la machine électrique

Country Status (2)

Country Link
DE (1) DE102016204959B4 (fr)
WO (1) WO2017162362A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113446288A (zh) * 2021-06-17 2021-09-28 安徽长江钢铁股份有限公司 一种新型trt用伺服作动器冷却装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017127627B3 (de) 2017-11-22 2018-11-22 Benteler Automobiltechnik Gmbh Kühlanordnung für einen elektrischen Antrieb

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645112A (en) * 1970-07-13 1972-02-29 Carrier Corp Refrigerant cooling system for electric motor
GB1344698A (en) * 1970-05-18 1974-01-23 Allis Louis Co Hermetically sealed electric motors
WO2000022359A1 (fr) * 1998-10-09 2000-04-20 American Standard Inc. Dispositif de refrigeration a liquide sans huile
US20060113851A1 (en) * 2004-11-30 2006-06-01 Nissan Motor Co., Ltd. Motor cooling device and cooling method
US7397154B2 (en) 2000-09-22 2008-07-08 Isothermal Systems Research, Inc. Spray cooled motor system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199389B (de) 1963-09-27 1965-08-26 Siemens Ag Kuehlmittelkreislauf fuer Laeufer elektrischer Maschinen, insbesondere Turbogeneratoren, mit direkt fluessigkeitsgekuehlter Wicklung, bei der ein fluessiges Medium zur Waermeabfuhr in den Hohlleitern zur Verdampfung gebracht wird
US3439203A (en) 1965-08-31 1969-04-15 Tokyo Shibaura Electric Co Rotor of an electrical rotary machine
KR101238209B1 (ko) * 2010-11-29 2013-03-04 엘지전자 주식회사 전동기

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1344698A (en) * 1970-05-18 1974-01-23 Allis Louis Co Hermetically sealed electric motors
US3645112A (en) * 1970-07-13 1972-02-29 Carrier Corp Refrigerant cooling system for electric motor
WO2000022359A1 (fr) * 1998-10-09 2000-04-20 American Standard Inc. Dispositif de refrigeration a liquide sans huile
US7397154B2 (en) 2000-09-22 2008-07-08 Isothermal Systems Research, Inc. Spray cooled motor system
US20060113851A1 (en) * 2004-11-30 2006-06-01 Nissan Motor Co., Ltd. Motor cooling device and cooling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113446288A (zh) * 2021-06-17 2021-09-28 安徽长江钢铁股份有限公司 一种新型trt用伺服作动器冷却装置

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DE102016204959B4 (de) 2018-06-28
DE102016204959A1 (de) 2017-09-28

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