EP2939331A2 - Machine électrique avec refroidissement direct du stator - Google Patents

Machine électrique avec refroidissement direct du stator

Info

Publication number
EP2939331A2
EP2939331A2 EP14706486.9A EP14706486A EP2939331A2 EP 2939331 A2 EP2939331 A2 EP 2939331A2 EP 14706486 A EP14706486 A EP 14706486A EP 2939331 A2 EP2939331 A2 EP 2939331A2
Authority
EP
European Patent Office
Prior art keywords
electromechanical transducer
shaft
stator
cooling
rotor
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Withdrawn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
EP14706486.9A
Other languages
German (de)
English (en)
Inventor
Olaf KÖRNER
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.)
Rolls Royce Deutschland Ltd and Co KG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2939331A2 publication Critical patent/EP2939331A2/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Withdrawn legal-status Critical Current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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating 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
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors

Definitions

  • the invention relates to an electromechanical transducer with a stator direct cooling.
  • Electromechanical transducers are be ⁇ known for quite some time. In the course of the shortage of fossil fuels, which are used to drive different vehicles, electromechanical transducers have found a large application in this area. Due to their robustness, their simple construction and high efficiency, electrome ⁇ chanic converters are nowadays also in vehicles - Hybridfahr ⁇ witness - or built aircraft. Depending on requirements, the electromechanical transducers are used as generators or motors. Especially in vehicles with electric drive or partially electric drive - hybrid vehicles - they are used both as a vehicle drive as well as a generator - for recuperation of electrical energy, for example when braking a vehicle.
  • electromechanical transducers In order to minimize the consumption of the energy of the vehicles, it is endeavored to design electromechanical transducers which have the highest possible efficiency. For this purpose, the power losses during operation of the electromechanical converter must be minimized.
  • Highly utilized electromechanical converters such as a PM machine with a tooth coil winding, require high current densities to achieve high torque and power densities.
  • the copper losses increase quadratically with the assumed torque.
  • an electromechanical transducer having at least one arranged on a shaft rotor, which is arranged in a sealed stator, the laminated core and winding are surrounded with an insulating cooling fluid, wherein the cooling fluid via radially to the shaft in the stator ⁇ center arranged first Cooling channels can be introduced and via second cooling channels in the winding head region at each axial end of the stator radially to the shaft is deflected or vice versa.
  • the electromechanical transducer is mounted in a support structure, a wall of at least one is used in the stand center is ⁇ associated with the first cooling channels to a storage of the electromechanical transducer to the surrounding support structure. This space is conserved while avoiding Moegli ⁇ che vibrations by a stable structure of the electromechanical converter ⁇ Africa.
  • the rotor is designed to be split on the shaft. Characterized in ⁇ radially geför center of the rotor cooling air can be changed particularly easily, which then flows through an air gap of the machine axially in both directions.
  • a gleichmä ⁇ ssige cooling of the rotor is possible.
  • a wall of at least one of the first cooling channels arranged in the middle of the stator is used to mount the shaft of the rotor on the stator. In this way it is mög ⁇ Lich to support the rotor relative to the stator in addition. This allows a stable construction of the electromechanical transducer.
  • the radial first and / or second cooling channels are made of fiber composite materials. Fiber composites are particularly light and at the same time very resistant.
  • the first and second cooling channels are made of non-magnetic and / or electrically conductive materials. Such materials minimize the power loss caused by electromagnetic influences.
  • the rotor In order to effectively cool the rotor of the electromechanical transducer 1, the rotor has parallel and / or radially running to the shaft cooling channels. Through these cooling channels air can be passed through for cooling.
  • the shaft of the electromechanical transducer is formed in an expedient embodiment as a drive shaft connected to an internal combustion engine.
  • FIG. 1 shows a quarter circular sector of a longitudinal section through an electromechanical transducer according to an embodiment of the invention
  • FIG. 2 shows a half cross section through an electromechanical ⁇ African converter according to an embodiment of the invention.
  • FIG. 1 shows a quarter section of a longitudinal section of the rotationally symmetrical electromechanical transducer 1 in parallel through its shaft 2.
  • FIG. 2 shows a half section of the cross section of the rotationally symmetrical electromechanical transducer 1 perpendicular to a shaft 2.
  • the broad arrows in FIG. 1 and FIG a course of an insulating cooling fluid 12 through a stator 6 and narrow arrows indicate a possible course of a cooling gas, generally air, through a rotor 4 of the electromechanical transducer 1.
  • the same reference numbers are used to designate the same elements in the respective figures.
  • FIG 1 a stand 6 is shown, which is mounted in a support structure 18 of the electromechanical transducer 1 - for example, a housing of the electromechanical transducer 1.
  • the support structure 18 is indicated in FIG 1 only as a concentric outer circle. Because of the high electrical power losses occurring in the stator 6, considerable heating of the stator 6 occurs. Hysteresis losses and eddy current losses in laminated cores 8 as well as resistance losses through windings 10 essentially contribute to this. Since the resulting temperatures can rise so high that it can lead to the destruction of the insulation and thus the entire stator 6, a cooling of the stator is essential. In addition, cooling automatically also reduces the power loss of the electro-mechanical converter 1.
  • the cooling fluid 12 is an insulating fluid. This not only a di ⁇ rect and intense cooling of the stator 6 is made possible, son ⁇ countries also reached a high reliability of a winding insulation against errors - not shown here.
  • a particular advantage is the fact that a winding circuit can be avoided with PM machines. Furthermore, a main insulation can be reduced or completely eliminated; except at locations where sub-conductor of the winding 10 abut an electrically conductive laminated core 8.
  • the insulating cooling fluid 12 is introduced on both sides in the winding head region at each axial end of the stator 6 radially to the shaft 2, wherein it flows through the winding 10 and is guided along the winding 10 and it cools down, in order subsequently to be discharged again in a stator center through a radial, circulating cooling channel 14.
  • the flow direction takes place in the opposite direction.
  • cooling channels 34 for air within the stator 6 can be provided, which run parallel to the shaft 2.
  • a rotor 4 is shown in FIG 2, which has a shaft 2, on which via ribs 24, an active part 26 of the rotor 4 is arranged.
  • the rotor 4 is designed in two parts, so that in the rotor center cooling air can be promoted radially to the shaft 2, which is the rotor 4 via parallel to the shaft 2 extending cooling channels 22 is supplied.
  • the air can then escape axially in both Richtun ⁇ gene.
  • the ribs 24 of the rotor 4 are so ge ⁇ staltet that they achieve a radial fan effect.
  • a power electronics 32 of the electromechanical converter 1 can optionally also be cooled by the insulating cooling fluid 12 is also passed to the power electronics 32 past or the power electronics 32 - which is located in an extra housing - itself lapped.
  • a wall of the radial central cooling channel 14 can also be designed for mounting 20 of the shaft 2 of the rotor 6, and since ⁇ are used by the support 6 for supporting the shaft 2 of the rotor 4.
  • the electromechanical transducer 1 can be stably constructed and is capable of receiving high torques.
  • a Läuferannon release space which can optionally be used for space and weight-saving arrangement of the above-mentioned storage 20.
  • the embodiment of the electromechanical transducer 1 shown in FIG 1 and FIG 2 can also be mounted as a bearingless generator directly to an internal combustion engine who ⁇ .
  • a stator housing-supporting structure 18- can be fastened directly to a flywheel housing of the internal combustion engine.
  • the rotor 4 is mounted directly on a flywheel / crankshaft of the Verbrennungskraftma ⁇ machine - not shown here.
  • electromechanical transducers are particularly suitable for vehicles or aircraft, if they are designed for a Maximalleis ⁇ tion up to 1 MW. This makes it possible to provide a compact and robust electromechanical transducer 1, which is suitable due to its lightweight construction with high torque density for use, for example, in aircraft or other vehicles in which lightweight, compact and thus high-performance machines are in demand.
  • the intensive and direct cooling by means of the insulating Cooling fluid 12 also provides an increased effect ⁇ degree safe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un convertisseur électromécanique (1) comprenant au moins un rotor (4) disposé sur un arbre (2), qui est disposé dans un stator (6) encapsulé (30), dont l'empilage de tôles (8) et l'enroulement (10) sont entourés d'un fluide de refroidissement isolant (12), le fluide de refroidissement (12) pouvant être introduit radialement par rapport à l'arbre (2) à travers des premiers canaux de refroidissement (14) disposés au milieu du stator, et être évacué radialement par rapport à l'arbre (2) à travers des deuxièmes canaux de refroidissement (16) dans la zone de tête de l'enroulement à chaque extrémité axiale du stator (6), ou inversement. De la sorte, il est possible de réaliser un convertisseur électromécanique (1) compact et robuste qui, par suite de son exécution allégée avec une haute densité de couple, convient par exemple à une utilisation dans des aéronefs ou d'autres véhicules.
EP14706486.9A 2013-02-04 2014-01-17 Machine électrique avec refroidissement direct du stator Withdrawn EP2939331A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310201778 DE102013201778A1 (de) 2013-02-04 2013-02-04 Elektrische Maschine mit Ständerdirektkühlung
PCT/EP2014/050893 WO2014118020A2 (fr) 2013-02-04 2014-01-17 Machine électrique avec refroidissement direct du stator

Publications (1)

Publication Number Publication Date
EP2939331A2 true EP2939331A2 (fr) 2015-11-04

Family

ID=50179555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14706486.9A Withdrawn EP2939331A2 (fr) 2013-02-04 2014-01-17 Machine électrique avec refroidissement direct du stator

Country Status (7)

Country Link
US (1) US20150372568A1 (fr)
EP (1) EP2939331A2 (fr)
CN (1) CN104969453A (fr)
BR (1) BR112015018340A2 (fr)
CA (1) CA2899980A1 (fr)
DE (1) DE102013201778A1 (fr)
WO (1) WO2014118020A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2914826B1 (fr) * 2012-11-05 2019-10-30 BC New Energy (Tianjin) Co., Ltd. Appareil à volant d'inertie refroidi
DE102016001838A1 (de) * 2016-02-17 2017-08-17 Audi Ag Elektrische Maschine für ein Kraftfahrzeug, Spulenträger für eine elektrische Maschine und Kraftfahrzeug
US10910916B2 (en) * 2017-11-30 2021-02-02 General Electric Company Fluid cooled and fluid insulated electric machine
US11444522B2 (en) * 2018-04-17 2022-09-13 Safran Electrical & Power Synchronous electrical machine with rotor having angularly shifted portions
DE102018113319B4 (de) 2018-06-05 2021-08-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Elektromotor mit flüssigkeitsgekühltem Stator und luftgekühltem Rotor
GB2574827A (en) * 2018-06-19 2019-12-25 Rolls Royce Plc Generating electric power
GB2574826A (en) * 2018-06-19 2019-12-25 Rolls Royce Plc Generating thrust
US11685543B1 (en) 2022-03-24 2023-06-27 Toyota Motor Engineering & Manufacturing North America, Inc. Vibrating actuator based hybrid cooling systems for electric machines

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US2285960A (en) * 1940-08-02 1942-06-09 Carl J Fechheimer Dynamoelectric machine
US2917644A (en) * 1957-03-21 1959-12-15 Westinghouse Electric Corp Innercooled turbine generators
US3136905A (en) * 1959-08-25 1964-06-09 Licentia Gmbh Bore hole drilling motor
US3506861A (en) * 1966-08-22 1970-04-14 Borg Warner Bearing arrangement for electric motors
US3675056A (en) * 1971-01-04 1972-07-04 Gen Electric Hermetically sealed dynamoelectric machine
US4039872A (en) * 1976-06-01 1977-08-02 General Electric Company Guide vane assembly for reverse flow cooled dynamoelectric machine
US5172784A (en) * 1991-04-19 1992-12-22 Varela Jr Arthur A Hybrid electric propulsion system
US20020130565A1 (en) * 2000-09-22 2002-09-19 Tilton Charles L. Spray cooled motor system
US6655484B2 (en) * 2000-12-02 2003-12-02 Ford Motor Company Hybrid powertrain having rotary electric machine, including engine-disconnect clutch, between internal combustion engine and transmission
JP3806303B2 (ja) * 2000-12-11 2006-08-09 三菱重工業株式会社 発電機における冷却構造
US20030052564A1 (en) * 2001-07-09 2003-03-20 Doris Wilsdorf Bipolar machines-a new class of homopolar motor/generator
EP1280257A1 (fr) * 2001-07-23 2003-01-29 ALSTOM (Switzerland) Ltd Générateur de haute tension
US8030818B2 (en) * 2004-06-15 2011-10-04 Siemens Energy, Inc. Stator coil with improved heat dissipation
CN2852507Y (zh) * 2005-07-27 2006-12-27 沈阳工业大学 一种采用永磁体的变频调速电动机
US7633194B2 (en) * 2006-10-26 2009-12-15 Gm Global Technology Operations, Inc. Apparatus for cooling stator lamination stacks of electrical machines
WO2011019334A1 (fr) * 2009-08-11 2011-02-17 General Electric Company Moteur à aimant permanent pour entraînement de pompe sous-marine
DE102010038529A1 (de) * 2010-07-28 2012-02-02 Siemens Aktiengesellschaft Fluidgekühlte elektrische Maschine

Non-Patent Citations (1)

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None *

Also Published As

Publication number Publication date
BR112015018340A2 (pt) 2017-07-18
WO2014118020A2 (fr) 2014-08-07
WO2014118020A3 (fr) 2015-06-18
DE102013201778A1 (de) 2014-08-07
CN104969453A (zh) 2015-10-07
US20150372568A1 (en) 2015-12-24
CA2899980A1 (fr) 2014-08-07

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