WO2015144733A1 - Ensemble formant moteur électrique et véhicule équipé d'un ensemble formant moteur électrique - Google Patents

Ensemble formant moteur électrique et véhicule équipé d'un ensemble formant moteur électrique Download PDF

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Publication number
WO2015144733A1
WO2015144733A1 PCT/EP2015/056311 EP2015056311W WO2015144733A1 WO 2015144733 A1 WO2015144733 A1 WO 2015144733A1 EP 2015056311 W EP2015056311 W EP 2015056311W WO 2015144733 A1 WO2015144733 A1 WO 2015144733A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric motor
motor assembly
channel
cooling
spiral
Prior art date
Application number
PCT/EP2015/056311
Other languages
German (de)
English (en)
Inventor
Holger Fröhlich
Original Assignee
Continental Automotive Gmbh
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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2015144733A1 publication Critical patent/WO2015144733A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics

Definitions

  • Electric motor assembly vehicle with an electric motor assembly
  • the present invention relates to an electric motor assembly. Furthermore, the invention relates to a vehicle with a said electric motor assembly.
  • Modern vehicles in particular hybrid / electric vehicles, are driven by electric motor arrangements which in each case comprise an electric machine for driving the vehicle and a motor vehicle
  • Power electronics for providing phase currents for the electric machine include. Depending on the design, such electric motor arrangements provide powers of over 100 kilowatts, in some vehicle models even more than 300 kilowatts.
  • a high inherent temperature of the electric motor assembly can lead to a loss of power of the electric machine and in extreme cases even to a failure of the power electronics.
  • the object of the present invention is to provide a way to efficiently dissipate the waste heat of the electric motor assembly.
  • This object is solved by subject matters of the independent claims.
  • Advantageous embodiments are the subject of Un ⁇ terrace.
  • a Elektromo ⁇ gate array in particular an electric motor assembly for driving a vehicle, especially an electric vehicle, is provided.
  • the electric motor assembly includes an electric machine as a drive.
  • the Elect ⁇ romotoranssen comprises a first cooling channel for carrying a coolant.
  • the first cooling channel comprises a longitudinal channel section and a spiral channel section for passing the coolant.
  • the longitudinal channel section leads to or through a rotor and / or a stator of the electric machine and thus directs the coolant to or through the rotor and / or the stator of the electric machine during operation of the electric motor arrangement and cools the same.
  • the spiral Ka ⁇ nalabintroductory downstream closed Arrival at the longitudinal channel section and receives the refrigerant from the longitudinal channel section and this results from the electric motor assembly.
  • spiral-shaped channel section means that the channel portion extends along a spiral line, or the channel portion has a helical channel centerline ⁇ .
  • the invention is based on the idea that the waste heat which arises during operation of the electric motor arrangement in the electric machine can be dissipated by a coolant flowing along a cooling channel section which leads to or through the stator and / or rotor of the electric machine, while absorbing the waste heat from the electric machine. Due to pressure differences in the coolant between the two channel ends of the said cooling channel section, it may happen that the coolant, which has absorbed the waste heat from the electric machine, is still in turbulence in said cooling channel section. Although turbulence in the coolant is generally desired for better absorption of the waste heat, turbulence, which arise in the coolant after passing through the electrical machine, lead to a backflow of the coolant. by means of at the channel end of the said cooling channel portion and consequently to the deterioration of the cooling capacity.
  • the coolant In order to avoid the disturbing turbulence in the coolant, the coolant should be discharged immediately after passing through the electric machine, wherein a backflow of the coolant should be prevented to the electric machine as possible.
  • the pressure in the coolant when flowing out of the coolant from the said channel section should not change too much, so that the coolant can flow out of the channel section homogeneously.
  • a spirally shaped cooling duct section satisfies the above-mentioned requirements when it is connected to the cooling duct section downstream, that is to say downstream of the cooling duct section, viewed in the flow direction of the coolant.
  • Such a spirally shaped cooling passage section has a deflection extending homogeneously over the entire passage section, which effectively prevents a backflow of the coolant into said cooling passage section.
  • This homogeneously extending deflection also prevents the coolant from abruptly decelerating as it flows through the spiral cooling channel section and thus forms turbulence.
  • the coolant can be discharged through the helical cooling channel section without any disturbing pressure change and without the formation of disturbing turbulences.
  • spiral-shaped duct section is directly connected to the longitudinal channel section strö ⁇ mung technically.
  • direct fluidic connection means that the longitudinal channel section merges directly into the spiral-shaped channel section without deflections or other channel sections located therebetween, which can lead to severe turbulence or pressure change in the coolant.
  • the electric motor arrangement further comprises a spiral-shaped housing part which delimits or forms the spiral-shaped channel section.
  • the spiral-shaped housing part may be a section of a main housing, in which the electric machine is arranged.
  • the spiral-shaped housing part may be a separate housing part flanged to the main housing.
  • the said housing part can be in various forming processes, such. As continuous casting or injection molding, produce inexpensively as a mass product.
  • the spiral-shaped channel section has a cross-sectional area which increases in the flow direction of the coolant.
  • the electric motor assembly further comprises an activedeffenabrioshim disposed in the spiral channel section is and is designed for actively discharging the coolant from the first cooling channel.
  • thedeffenab fertilmaschine is designed as a fan, esp. A double-flow centrifugal fan.
  • thedeffenab technicallytechnik is rotatably connected to a rotor shaft of the electric machine.
  • thedeffenabtechnologieritt can be driven by the electric machine, which rotates anyway during operation of the electric motor assembly. This eliminates additional drive components for driving thedestoffab Technologyaku.
  • the first cooling channel is connected to a heat exchanger.
  • the waste heat from the electric machine can then be removed from the heat exchanger, e.g. for heating a passenger compartment of the
  • the electric motor assembly further comprises power electronics for providing phase currents for the electric machine, and a second cooling channel for conveying a coolant.
  • the second cooling channel or a channel portion of the second cooling channel along a cooling area of the power electronics ⁇ passes.
  • the aforesaid spiral channel section forms a section of the second cooling channel, which lies downstream of the power electronics or the channel section of the second cooling channel, which passes along the cooling surface of the power electronics.
  • the spiral channel section is arranged spatially between the electric machine and the power electronics.
  • the two channel sections Due to the spatial arrangement of the common spiral channel portion and thus thedeffenabrioshim between the electric machine and the power electronics or between the longitudinal channel portion of the first cooling channel and the leading past the power electronics channel portion of the second cooling channel, which is upstream of the spiral ⁇ shaped channel section are the two channel sections (the longitudinal channel section and the one channel section of the second cooling channel) are fluidly separated from each other by the common spiral channel section.
  • the coolant from each of the two channel sections without fluidic disturbances in the respective other channel section such. B. be discharged due to a pressure loss in the other channel section.
  • a vehicle particularly a hybrid / electric vehicle provided having an electric motor arrangement described above for driving the vehicle and the aforementioned heat exchanger, wherein the first and / or the second cooling channel of the Elektromo ⁇ gate array to the Heat exchanger is connected fluidically.
  • Figure 1 shows an electric motor assembly according to an embodiment of the invention in a schematic cross-sectional view
  • FIG. 2 shows a spiral-shaped housing part of the electric motor assembly is provided in Figure 1 together with ⁇ formed therein a helical channel portion in a schematic cross-sectional view; 3 shows a double-flow centrifugal fan of the electric motor arrangement shown in Figure 1 in a schematic three-dimensional representation.
  • the electric motor assembly EA comprises a housing GH, which comprises a first housing part GT1, a second housing part GT2 and a housing cover GD.
  • the first housing part GT1 is cup-shaped and um ⁇ includes a cylindrical interior.
  • the first housing part GT1 comprises a first cylinder jacket-shaped
  • the first housing bottom GB1 has a number of openings, which form inlet openings ELI of a first cooling channel KK1 for passing a coolant.
  • the first housing base GB1 further has in the circle center a shaft bearing WL for supporting a rotor shaft RW of an electric machine EM to be described below.
  • the first housing side wall GS1 On the side facing away from the interior and at the same time away from the first housing base GB1, the first housing side wall GS1 has an annular disk-shaped projection VS which divides the interior into a first cavity HR1 and a second cavity HR2 which lie one behind the other in the axial direction of the interior ,
  • the housing has a circular GH, kon ⁇ centrally enclosed by the projection VS orifice forming a passage opening DL1 of the first cooling channel CC1.
  • the first cavity HR1 is cylindrical.
  • an electric machine EM is arranged, which is designed as a foreign or permanent-magnet synchronous or asynchronous machine and comprises a stator ST and a rotor RT together with the rotor shaft RW.
  • the stator ST is rotatably fixed to the inside of the first housing side wall GS1 and has a number of longitudinal grooves LN disposed on the outer surface of the stator ST and axially toward the rotational axis DA of the rotor shaft RW from an axial end of the stator ST extending continuously through another axial end of the stator ST.
  • these longitudinal grooves LN form part of a longitudinal channel section LK of the first cooling channel KK1, which extends between the inlet openings ELI and the passage opening DL1 and is designed to pass the coolant.
  • the rotor RT together with the rotor shaft RW, is rotatable relative to the stator ST in the first cavity HR1 and mounted concentrically with the stator ST on the shaft bearing WL.
  • the rotor RT has a number of through holes DB that extend continuously in the direction of the axis of rotation DA of the rotor shaft RW from one axial end of the rotor RT to another axial end of the rotor RT.
  • the through-holes DB also form part of the longitudinal channel section LK of the first cooling channel KK1.
  • the electric machine EM is connected to a drive shaft, not shown in the figure and via the drive shaft with likewise not shown wheels of the electric vehicle and operates in the operation of the
  • the second cavity HR2 is spirally shaped and is bounded by a housing part SG, which comprises a portion of the first housing side wall GS1 in the region of the second cavity HR2 and the projection VS and has a spiral cross section, as shown in detail in Figure 2.
  • the housing part SG In the middle of the cavity HR2, the housing part SG on the above-described passage opening DL1.
  • the housing part SG has a radially projecting into the housing outer opening, which forms an outlet opening AS of the cavity HR2.
  • the cavity HR2 forms a spiral-shaped channel section, which extends radially from the passage opening DL1 to the outlet opening AS and adjoins the longitudinal channel section LK via the passage opening DL1.
  • This spiral channel section SG forms a portion of the first cooling channel KK1 and serves to pass the coolant.
  • the spiral channel section SG is connected via the outlet opening AS and via a flexible hose to a heat exchanger WT of the electric vehicle, wherein the coolant is discharged from the spiral channel section SG to the heat exchanger WT through the hose.
  • the flow direction SR of the coolant spirally extends in the channel section SK from the passage opening DL1 to the outlet opening AS.
  • the spiral channel section SK has a cross-sectional area QF which increases in the flow direction SR. Esp. the channel ⁇ section SK on a form of a logarithmic spiral.
  • a double-flow centrifugal fan RV is arranged concentrically.
  • the structure and shape of the radial fan RV are shown in detail in Figure 3 in a sche ⁇ matic three-dimensional view.
  • the radial fan RV comprises a hub NB, which forms with the rotor shaft RW a rotationally fixed shaft-hub connection between the radial fan RV and the rotor shaft RW.
  • the centrifugal fan RV also includes an annular disk-shaped cutting disc TS formed on the hub NB concentric with the hub NB and radially extending from the axial center of the hub NB.
  • the radial fan RV further comprises a first group of paddle wheels SRI and a second group of paddle wheels SR2, which are each formed on one of the two sides of the cutting disc TS and radially extending from the hub NB.
  • the display field wheels SRI, SR2 in this embodiment are backwards ie in a direction of rotation of the radial fan RV ent ⁇ opposite direction curved and axially limited in each case by a first ring-shaped cover disk DS1 or a second annular disc-shaped cover disk DS2.
  • the radial fan RV has a first annular opening between the hub NB and the first cover disk DS1, which forms a first axial intake opening AO1 in the form of a first air inlet nozzle of the radial fan RV (see FIG. 1). Between the hub NB and the second shroud DS2, the radial fan RV has a second annular opening forming a second axial suction port A02 in the form of a second air inlet nozzle of the centrifugal fan RV.
  • the second housing part GT2 is also cup-shaped and surrounds a cylindrical interior, which forms a third cavity HR3 of the housing GH.
  • the second housing part GT2 comprises a second cylinder jacket-shaped housing side wall GS2 and a second circular disk-shaped housing base GB2. With the second housing base GB2, the second housing part GT2 closes off the interior or the second cavity HR2 of the first housing part GT1 in its axial direction.
  • the second housing bottom GB2 has a number of openings, which form passage openings DL2 of a second cooling channel KK2. In the middle of the circle, the second housing bottom GB2 has a further shaft bearing WL for supporting the rotor shaft RW.
  • the housing cover GD On the second housing part GT2 of the housing cover GD is connected, which is formed in a circular disk and the third cavity HR3 in the axial direction terminates on one side.
  • the housing cover GD has a number of Breakthroughs that form inlet openings EL2 of the second cooling channel KK2.
  • the electric motor assembly EA has a power electronics LE for providing phase currents for the electric machine EM, which is attached to the housing cover GD and has a cooling surface KF.
  • the Leis ⁇ consumer electronics LE is not shown on in the figure, electrical connections with the electric motor EM and in the figure the external electrical components, not shown, such. As a power source, electrically connected.
  • waste heat is generated in the electric machine EM and the power electronics LE.
  • This waste heat is absorbed by the coolant in the form of cooling air and discharged, is circulated during operation of the Elektromo ⁇ gate array EA in a first and a second cooling circuit KL1, KL2.
  • the first cooling circuit KL1 includes the first cooling passage KK1 and extends from the first intake ports ELI through the longitudinal grooves LN to the stator ST and the through-holes DB the rotor RT and thus the longitudinal channel section LK, the first passage opening DL1, the first suction opening AOl on the radial fan RV, the spiral channel section SK and then through the outlet opening AS and on to the heat exchanger WT.
  • the first cooling circuit KL1 is shown in FIG. 1 with dotted lines.
  • the second cooling circuit KL2 comprises the second cooling channel KK2 and extends from the second inlet openings EL2 through the channel section of the second cooling channel KK2 on the cooling surface KF of the power electronics LE, the second passage opening DL2 on the second housing bottom GB2, the second suction port A02 of the centrifugal fan RV and the spiral channel section SK and then through the outlet opening AS and on to the heat exchanger W.
  • the second cooling circuit KL2 is shown in Figure 1 with dashed lines.
  • the two cooling circuits KL1 and KL2 thus form two of ⁇ each other substantially separate Toggle parallel closed cooling circuits, which comprise the spiral channel interface SK as a common portion which is shown in Figure 1 with dashed lines.
  • the radial fan RV rotates with the rotor shaft RW and blows the cooling air located in the spiral-shaped channel cut SK to the heat exchanger W via the outlet opening AS. This results in negative air pressure in the spiral channel cut SK and consequently air pressure differences between the spiral channel cut SK and the longitudinal channel section LK or between the spiral channel cut SK and the channel section of the second cooling channel KK2 in the third cavity HR3.
  • the cooling air which is thermally charged with the waste heat of the electric machine EM and the power electronics LE, from the longitudinal channel section LK and the channel section of the second cooling channel KK2 and thus from the first and the third cavity HR1, HR3 through the through Laßö réelleen DL1, DL2 sucked into the spiral channel section SK.
  • the thermally charged cooling air is then removed from the radial fan RV through the outlet opening AS to the heat exchanger WT.
  • the cooling air discharges the charged waste heat and cools down and is discharged from the heat exchanger WT into the vehicle environment UG.
  • the waste heat is from the heat exchanger ⁇ WT z. B. for heating passenger compartment of the
  • Cavities HR1, HR3 relative to the vehicle environment UG.
  • cold vehicle outside air from the vehicle surroundings UG is sucked into the first and third cavities HR1, HR3 through the first and second intake ports ELI, EL2 and supplied to the first and second circuits KL1, KL2.
  • the vehicle outside air which was the first refrigeration cycle performed KL1 to ⁇ , flows through the longitudinal channel section LK or the longitudinal grooves LN to the stator ST and the through holes DB on the rotor RT.
  • the cooling air absorbs the waste heat from the stator ST and the rotor RT and cools the stator ST and the rotor RT and thus the electric machine EM.
  • the vehicle outside air which was the second cooling circuit out KL2 to ⁇ , flows on the cooling surface KF of Leis ⁇ consumer electronics LE over and takes up the waste heat from the power electronics LE and thus cools the power ⁇ electronics LE.
  • the thermally charged with the waste heat of the electric machine EM and the power electronics LE cooling air then flows through the generated by the radial fan RV Air pressure differences in the spiral channel section SK and is discharged from the centrifugal fan RV to the heat exchanger WT.
  • the cooling arrangement KA has hardly any additional costs.
  • the cooling arrangement KA without additional adjustment of the electrical Machine EM be ⁇ out.

Landscapes

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

Abstract

L'invention concerne un ensemble formant moteur électrique (EA) qui présente les éléments caractéristiques suivants : - une machine électrique (EM) servant d'entraînement, et - un premier conduit de refroidissement (KK1) servant à transporter un fluide de refroidissement et comportant une section de conduit longitudinale (LK) servant au passage du fluide de refroidissement et s'étendant sur ou à travers un rotor (RT) et/ou un stator (ST) de la machine électrique (EM), - le premier conduit de refroidissement (KK1) comportant en outre une section de conduit hélicoïdale (SK) servant au passage du liquide de refroidissement et raccordée en aval à la section de conduit longitudinal (LK).
PCT/EP2015/056311 2014-03-28 2015-03-24 Ensemble formant moteur électrique et véhicule équipé d'un ensemble formant moteur électrique WO2015144733A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014205870.8A DE102014205870A1 (de) 2014-03-28 2014-03-28 Elektromotoranordnung, Fahrzeug mit einer Elektromotoranordnung
DE102014205870.8 2014-03-28

Publications (1)

Publication Number Publication Date
WO2015144733A1 true WO2015144733A1 (fr) 2015-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/056311 WO2015144733A1 (fr) 2014-03-28 2015-03-24 Ensemble formant moteur électrique et véhicule équipé d'un ensemble formant moteur électrique

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DE (1) DE102014205870A1 (fr)
WO (1) WO2015144733A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3474423A1 (fr) * 2017-10-17 2019-04-24 KEB Automation KG Dispositif d'entraînement pour une pompe
EP3245715B1 (fr) * 2015-04-09 2022-04-13 EBM-Papst Mulfingen GmbH&CO. KG Moteur électrique à refroidissement amélioré

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016108233A1 (de) * 2016-05-03 2017-11-09 Ebm-Papst Mulfingen Gmbh & Co. Kg Motoraufnahmevorrichtung

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US2460752A (en) * 1947-09-09 1949-02-01 Gen Electric Dynamoelectric machine
US4961016A (en) * 1989-08-09 1990-10-02 General Motors Corporation Dual-face cooling fan for a dynamoelectric machine
JPH09182372A (ja) * 1995-12-25 1997-07-11 Toyo Electric Mfg Co Ltd 鉄道車両用主電動機
WO2005008860A2 (fr) * 2003-07-10 2005-01-27 Magnetic Applications Inc. Alternateur compact a forte puissance
CN202260858U (zh) * 2011-10-18 2012-05-30 西安盾安电气有限公司 一种电机外冷却装置

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DE2526532A1 (de) * 1975-06-13 1976-12-23 Vyzk Vyvojovy Ustav Elektric Rotierende elektrische maschine mit radialluefter
DE3500069A1 (de) * 1985-01-03 1986-08-14 Daimler-Benz Ag, 7000 Stuttgart Aus einem luftfoerdergeblaese und einer lichtmaschine bestehendes aggregat fuer eine brennkraftmaschine
JP4185654B2 (ja) * 2000-08-04 2008-11-26 カルソニックカンセイ株式会社 遠心式の多翼送風機
DE102004037079A1 (de) * 2004-07-30 2006-03-23 Siemens Ag Elektrischer Kompaktantrieb
FR2935074B1 (fr) * 2008-08-12 2023-04-28 Leroy Somer Moteurs Machine electrique tournante avec un ventilateur de refroidissement a chaque extremite du stator
DE102010001705A1 (de) * 2010-02-09 2011-08-11 Siemens Aktiengesellschaft, 80333 Elektrische Maschine
EP2566015B1 (fr) * 2011-08-29 2019-11-27 Grundfos Management A/S Moteur électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460752A (en) * 1947-09-09 1949-02-01 Gen Electric Dynamoelectric machine
US4961016A (en) * 1989-08-09 1990-10-02 General Motors Corporation Dual-face cooling fan for a dynamoelectric machine
JPH09182372A (ja) * 1995-12-25 1997-07-11 Toyo Electric Mfg Co Ltd 鉄道車両用主電動機
WO2005008860A2 (fr) * 2003-07-10 2005-01-27 Magnetic Applications Inc. Alternateur compact a forte puissance
CN202260858U (zh) * 2011-10-18 2012-05-30 西安盾安电气有限公司 一种电机外冷却装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3245715B1 (fr) * 2015-04-09 2022-04-13 EBM-Papst Mulfingen GmbH&CO. KG Moteur électrique à refroidissement amélioré
EP3474423A1 (fr) * 2017-10-17 2019-04-24 KEB Automation KG Dispositif d'entraînement pour une pompe

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