EP3202018A1 - Machine électrique à refroidissement - Google Patents

Machine électrique à refroidissement

Info

Publication number
EP3202018A1
EP3202018A1 EP15744943.0A EP15744943A EP3202018A1 EP 3202018 A1 EP3202018 A1 EP 3202018A1 EP 15744943 A EP15744943 A EP 15744943A EP 3202018 A1 EP3202018 A1 EP 3202018A1
Authority
EP
European Patent Office
Prior art keywords
housing
stator
coolant
separating element
face
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP15744943.0A
Other languages
German (de)
English (en)
Inventor
Uwe Knappenberger
Denis Kern
Daniel Kuehbacher
Armin Elser
Michael Schwiderski
Ralph Peter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3202018A1 publication Critical patent/EP3202018A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to electrical machines, in particular rotary electric machines with liquid cooling.
  • cooling fins can be arranged on an outer side of the housing.
  • Water jacket cooling in which one or more cooling channels are provided in the housing of the electric machine, which are flowed through by a cooling fluid, usually water, and the most favorable by their geometry
  • oil-cooled electrical machines which have an oil-flowed shaft or direct wetting or flow of the windings. or provide the windings with the cooling medium.
  • Oil as a cooling medium has the advantage that, in contrast to water, no separation between the current-carrying parts is necessary because oil does not conduct electricity and thus serves as an insulator.
  • the document US 2012/0074739 A1 discloses an electric machine with a housing and a stator with a stator winding. Between the housing and the stator a plurality of cooling channels are formed. The cooling channels extend in the axial direction and communicate with the interior of the housing, wherein the winding heads of the stator winding can be overflowed by a cooling medium.
  • a rotary electric machine comprising: a housing having an interior space;
  • stator body at least partially abutting an inner wall of the housing
  • one or more coolant channels disposed between the stator assembly and the housing and / or in the stator body and fluidly interconnecting first and second faces of the stator body;
  • a manifold region for receiving coolant and for distributing the coolant through the one or more coolant channels.
  • Stator body provided so that there a liquid cooling medium is supplied and flows from there through the axially extending coolant channels in the direction of the second end face.
  • the distributor area can be separated by an isolating element in the housing, in particular from an interior and thus to the first
  • the separating element may extend in the form of an annular ring in the axial direction between the first end face of the stator arrangement and an inner surface of a housing wall of the housing and in particular be formed integrally with the housing or a housing part.
  • the distributor region is formed by the housing, the stator body and the annular separator, the z. B. coaxial between the first
  • Front side of the stator and an inner wall of the housing arranged can be.
  • the distributor area is delimited with respect to the remaining interior of the housing. This represents a particularly simple embodiment of the distributor area, which can be produced by simple means.
  • the separating element can have one or more through-openings which are adjacent to one another in the circumferential direction of the separating element, in order to discharge coolant from the distributor region onto a winding head of a stator winding of the stator arrangement.
  • a coolant flow from the distributor region can additionally be provided via the winding head on the first end side of the stator by additional outlet openings in the separating element in order to achieve cooling of the winding head on the first end side.
  • the separating element may have a length in the axial direction in order to form a leakage gap between an end of the separating element facing the first end side and the first end side of the stator arrangement, so that coolant from the distributor area is applied to a winding head of a stator
  • Stator winding of the stator assembly is omitted, in particular, the leakage gap is provided only at a particular upper portion of the distributor region.
  • the separating element can be formed by a potting structure for a winding winding of a stator winding in the stator body on the first end face, wherein the potting structure covers the winding head and extends up to a
  • Housing wall of the housing extends.
  • a collecting region can be separated from the interior, into which the openings of the coolant channels at the second end face of the
  • the collecting area is separated by a further separating element from the interior, wherein the further separating element is annular between the second end face of the stator assembly and a Inner surface of a housing wall of the housing extends and in particular is formed integrally with the housing or a housing part.
  • the stator body may comprise stacked laminations and the one or more coolant channels may be formed by grooves on the stator body at its outer surface associated with the housing wall.
  • one or more of the coolant channels in a first, in particular lower region of the electric machine has a higher flow resistance than one or more of the coolant channels in a second, in particular upper region of the electric machine.
  • Figure 1 is a schematic cross-sectional view through a
  • Figures 2a and 2b are sectional views through Stator Theory transverse to the axial
  • Figure 3 is a schematic cross-sectional view through a
  • Figure 4 is a schematic cross-sectional view through a
  • the electric machine 1 shows a schematic cross-sectional view through an electric machine 1 along a rotation axis D.
  • the electric machine 1 comprises a, in the present case in two parts, housing 2 with a housing pot 21 and a housing cover 22 as housing parts.
  • the housing cover 22 is applied to the opening of the housing pot 21, so as to form a closed interior space 23.
  • a stator assembly 3 is arranged, which is cylindrical.
  • the stator assembly 3 has a stator body 31, which may be formed of stacked laminations.
  • the stator assembly 3 defines an inner recess 4 in which a rotor 5 is rotatably mounted on a rotor shaft 6.
  • the rotor shaft 6 is rotatably mounted on bearings 7 which are provided in the housing 2.
  • a bearing may be arranged on the bottom of the housing pot 21 and another bearing on the housing cover 22 designed as a bearing plate.
  • the bearing of the rotor shaft 6 is preferably formed liquid-tight.
  • the electric machine 1 comprising the stator arrangement 3 and the rotor 5 is designed as an electronically commutated electric machine and therefore has a stator winding 33 which comprises a plurality of stator coils which are wound around in each case one or more stator teeth 32.
  • the stator teeth 32 essentially project in the radial direction from a cylindrical stator yoke 34.
  • the rotor 5 has a rotor body 51, in which permanent magnets 52 are embedded for providing a field magnetic field.
  • the permanent magnets 52 may be placed on the rotor poles or arranged as spoke magnets.
  • coolant channels 8 are provided, which has a region in the interior 23 of the housing 2 at a first end face 35 of the stator 3 with a region in the interior 23 of the housing 2 at a second Fluidly connect end face 36 of stator 3.
  • the corresponding configuration of the stator body 31 is shown as a detail in the cross-sectional view of Figure 2a.
  • the coolant channels 8 may also be integrated into the stator body 31 and penetrate the stator body 31 from the first end face 35 to the second end face 36.
  • the corresponding laminar section can have the positions of the grooves or recesses for forming the coolant channels 8 that can be taken from FIGS. 2 a and 2 b.
  • a distributor region 9 is provided in the region of the first end face 35 of the stator 3, which is adapted to the arrangement of the openings of the coolant channels 8.
  • the distributor region 9 represents a volume for the cooling liquid, which communicates with the openings of the coolant channels 8 in the region of the first end face 35 of the stator 3.
  • the volume of the distributor region 9 is formed by the first end face 35 of the stator body 31, a portion of the inner wall of the housing pot 21 and a portion of the housing cover 22, so that the volume is substantially annularly distributed in the housing 2.
  • a separating element 10 is provided, which separates the volume of the distributor region 9 from the volume of the remaining interior 23 of the housing 2.
  • the separating element 10 is essentially cylindrical and extends between the inner surface of the housing cover 22 and the first end face 35 of the stator 3.
  • the separating element 10 can completely seal off the volume of the distributor region 9 from the remaining interior 23.
  • the separating element 10 may also be formed in one piece with the housing cover 22 or the housing 2.
  • a seal (not shown) may be provided which prevents leakage of the liquid coolant into the remaining interior 23 of the housing 2 from the volume of the distributor region 9.
  • a winding head of the stator winding 33 on the first end face 35 of the stator 3 can also be cast with a potting structure 16, so that the winding head potting forms the separation of the manifold region 9 from the interior 23 of the housing 2
  • the housing cover 22 may be provided with a coolant supply port 24 which opens into the volume of the manifold region 9 to supply coolant.
  • the coolant supplied there then distributes in the circumferential direction and flows through the coolant channels 8 in the direction of the second end face 36. During the flow of the coolant through the coolant channels 8, this operating heat can be absorbed by the stator body 31.
  • a coolant outlet opening 25 can be provided, through which the coolant collecting in the housing 2 can flow or be pumped out.
  • a plurality of coolant outlet openings 25 may be provided, in particular, these may be at axial positions in the region of the first and the second end face of the electric machine 1 may be provided.
  • the arrangement of the coolant outlet openings 25 can be made dependent on, for example, at which points within the electrical machine the coolant enters the interior (eg through gaps, openings or free outflow).
  • a further separating element 12 is provided, which essentially separates the openings of the coolant channels 8 at the second end face 36 from the interior 23 of the housing 2.
  • the further separating element 12 forms a circumferentially circumferential annular volume of a collecting area 13, in which the heated coolant is collected and discharged via the coolant outlet opening 25.
  • the further separating element 12 may be formed separately or integrally with the housing 2.
  • FIG. 5 shows a further electric machine 1, in which the separating element 10 is provided with circumferentially distributed through-going outlet openings 14 to the interior 23, which discharge part of the introduced coolant into the interior 23.
  • the coolant can flow out of the volume of the distributor region 9 via the winding heads of the stator winding 33 on the first end face 35 of the stator 3 and cause additional cooling there.
  • the gap dimensions of the separating element 10 can be provided so that a targeted leakage flow for the coolant via the winding head of the stator winding 33 at the first end face 35 is achieved. It forms a leakage gap between the stator 3 facing the end of the separator element 10 and the first end face 35 of the stator 3.
  • the leakage gaps are usefully provided only in an angular range on the upper side of the electric machine 1 (fixed installation position provided), eg between +/- 10 ° to +/- 70 ° starting from a radially upward direction, since the coolant (at low pressure) would otherwise flow out completely into the interior 23 even in a lower region of the leakage gap.
  • the provision of the further separating element 12 and the outlet openings 14 of the separating element 10 in the region of the winding head of the stator winding 33 on the first end face 35 can also be combined. In the case of providing the further separating elements 12 for forming the
  • the coolant channels 8 must be designed so that the pressure drop in the coolant channels 8 at the design point is sufficiently high so that the coolant can accumulate in the manifold area 9 over the entire height and the coolant is still present in the upper region with a sufficient pressure, the can cause the flow in the upper coolant channels 8.
  • the above electrical machines 1 enable efficient and space-saving jacket cooling and thus an increased continuous power density.
  • the arrangement of the coolant channels 8 directly on the laminations of the stator body 31 causes a shortening of the internal path compared to a coolant channel 8 in the housing 2, in which additional contact resistances are present.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne une machine électrique rotative (1) comprenant : un carter (2) pourvu d'un espace interne (23) ; un ensemble stator (3) disposé dans l'espace interne (23) du carter (2) et présentant un corps statorique (31) qui est en contact au moins en partie avec la paroi interne du carter (2) ; au moins un canal de refroidissement (8) qui est disposé entre l'ensemble stator (3) et le carter (2) et/ou qui est disposé dans le corps statorique (31), et relie une première et une deuxième face frontale (35, 36) du corps statorique (31) ; une zone de répartition (9) destinée à recevoir un réfrigérant et à répartir le réfrigérant dans le ou les canaux à réfrigérant (8).
EP15744943.0A 2014-09-29 2015-08-03 Machine électrique à refroidissement Withdrawn EP3202018A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219724.4A DE102014219724A1 (de) 2014-09-29 2014-09-29 Elektrische Maschine mit Kühlung
PCT/EP2015/067810 WO2016050387A1 (fr) 2014-09-29 2015-08-03 Machine électrique à refroidissement

Publications (1)

Publication Number Publication Date
EP3202018A1 true EP3202018A1 (fr) 2017-08-09

Family

ID=53765221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15744943.0A Withdrawn EP3202018A1 (fr) 2014-09-29 2015-08-03 Machine électrique à refroidissement

Country Status (4)

Country Link
EP (1) EP3202018A1 (fr)
CN (1) CN106716794B (fr)
DE (1) DE102014219724A1 (fr)
WO (1) WO2016050387A1 (fr)

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DE102016209752A1 (de) * 2016-06-03 2017-12-07 Continental Automotive Gmbh Kühlung einer elektrischen Maschine
DE102016211593A1 (de) * 2016-06-28 2017-12-28 Robert Bosch Gmbh Elektrische Maschine
CN106385122A (zh) * 2016-09-20 2017-02-08 北京交通大学 电机的蜂巢式密闭通风冷却装置
DE102017216066B4 (de) 2017-09-12 2020-12-17 Audi Ag Elektromotor mit mindestens einem Kühlmittelkanal
JP2019103201A (ja) * 2017-11-30 2019-06-24 日立グローバルライフソリューションズ株式会社 スロットレス型電動機及び、それを用いた電動送風機や電気掃除機
DE102017221803A1 (de) * 2017-12-04 2019-06-06 Mahle International Gmbh Elektrische Maschine, insbesondere für ein Fahrzeug
DE102017221799A1 (de) * 2017-12-04 2019-06-06 Mahle International Gmbh Elektrische Maschine, insbesondere für ein Fahrzeug
DE102017221836A1 (de) * 2017-12-04 2019-06-06 Mahle International Gmbh Elektrische Maschine, insbesondere für ein Fahrzeug
AT521060A1 (de) * 2018-03-27 2019-10-15 Miba Ag Stator
CN113454878A (zh) * 2019-01-16 2021-09-28 博格华纳公司 集成式定子冷却护套系统
DE102019103007A1 (de) * 2019-02-07 2020-08-13 Schaeffler Technologies AG & Co. KG Elektrische Maschine mit einem mehrfunktionalen Scheibenelement für einen Rotor
DE102019207323A1 (de) * 2019-05-20 2020-11-26 Zf Friedrichshafen Ag Elektrische Maschine eines Fahrzeuges
DE102020200134A1 (de) 2020-01-08 2021-07-08 Zf Friedrichshafen Ag Stator einer elektrischen Maschine mit einer Fluidkanalanordnung zum Führen eines Kühlfluids und elektrische Maschine
CN111416464B (zh) * 2020-03-16 2021-03-16 清华大学 油水双循环冷却电机机壳
DE102020214044A1 (de) 2020-11-09 2022-05-12 Valeo Siemens Eautomotive Germany Gmbh Elektrische Maschine mit umfangsseitigem Kühlmantel
US12088149B2 (en) 2021-12-02 2024-09-10 Borgwarner Inc. Cooling system for an electric machine
US12034336B2 (en) 2021-12-02 2024-07-09 Borgwarner Inc. Cooling system for an electric machine having a wound field rotor
DE102022119764A1 (de) 2022-08-05 2024-02-08 Bayerische Motoren Werke Aktiengesellschaft Kühlung einer elektrischen Antriebsmaschine eines Kraftfahrzeugs

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Also Published As

Publication number Publication date
WO2016050387A1 (fr) 2016-04-07
DE102014219724A1 (de) 2016-03-31
CN106716794B (zh) 2019-07-16
CN106716794A (zh) 2017-05-24

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