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WO2017178748A1 - Electric compressor with moulded cooling circuit - Google Patents

Electric compressor with moulded cooling circuit Download PDF

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Publication number
WO2017178748A1
WO2017178748A1 PCT/FR2017/050865 FR2017050865W WO2017178748A1 WO 2017178748 A1 WO2017178748 A1 WO 2017178748A1 FR 2017050865 W FR2017050865 W FR 2017050865W WO 2017178748 A1 WO2017178748 A1 WO 2017178748A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
cooling circuit
electric
electric compressor
cooling
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.)
Ceased
Application number
PCT/FR2017/050865
Other languages
French (fr)
Inventor
Yannick SOHIER
Anthony LUCY
Amrid MAMMERI
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.)
Valeo Electrification SAS
Original Assignee
Valeo Systemes de Controle Moteur SAS
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 Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of WO2017178748A1 publication Critical patent/WO2017178748A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/12—Turbo charger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

Definitions

  • the present invention relates to the field of electric compressors, and more particularly to an electric supercharger for a motor vehicle with a cooling circuit.
  • an electric compressor is a device used to supercharge a heat engine, operating with an electric motor driving a compressor wheel and having an electronic assembly.
  • the electric compressor is placed on the air intake line of an internal combustion engine, in addition for example a turbocharger.
  • the electric compressor plays the same role as the turbocharger, namely increase the intake pressure of the fresh gases in the engine, but is used in particular during transient phases to overcome turbocharger response time problems. In such devices, it is necessary to cool the electric motor as well as the electronic assembly.
  • the present invention proposes an electric compressor comprising at least one compressor wheel driven by an electric motor controlled by an electronic assembly, and comprising a cooling circuit, characterized in that the cooling circuit is formed by a molding process, for example under pressure.
  • the cooling circuit comprises at least two parts.
  • a first portion of the cooling circuit is disposed around the electric motor, parallel to an axis of the electric compressor, and a second portion of the cooling circuit is disposed at the rear face of the electronic assembly, perpendicular to the axis of the electric compressor.
  • the advantage of such a solution is to be able to make a water circuit that can cool the electric motor while cooling elements perpendicular or remote from the electric motor.
  • the two parts of the cooling circuit form a single cooling duct.
  • the cooling circuit comprises at least two openings towards the outside of the compressor. According to one embodiment of the invention, the cooling circuit is closed by at least one additional cover.
  • the two openings of the cooling circuit are each closed by an additional cover.
  • the electric motor is a permanent magnet or variable reluctance motor.
  • the invention also relates to a method of manufacturing the cooling circuit of the electric compressor according to the invention comprising a pressure molding step of the cooling circuit.
  • the invention also relates to the use of the electric compressor according to the invention in an internal combustion engine or fuel cell.
  • FIG. 1 is a schematic representation of a sectional view of a compressor according to the invention
  • FIG. 2 is a schematic representation of an external view of a part of a compressor according to the invention
  • FIG. 3 is a schematic representation of a sectional view of a portion of a compressor according to the invention.
  • the present invention relates to an electric compressor 1.
  • the term electric compressor 1 an air compressor, volumetric or not and for example centrifugal or radial, driven by an electric motor, for the purpose of supercharging a heat engine.
  • the electric motor is a DC or AC motor, or any type of electric motor of the same type.
  • the electric motor is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).
  • the motor is a permanent magnet motor.
  • FIG. 1 illustrates an example of an electric compressor 1.
  • the electric compressor 1 comprises at least one electric motor 5, and a compressor wheel 3.
  • the electric motor 5 is disposed in a housing 4 or envelope 4 engine.
  • the electric motor 5 comprises at least one rotor and a stator.
  • the electric motor 5 allows the rotation of a shaft 6 of the electric compressor via bearings.
  • the shaft 6 thus rotates the wheel 3 of the compressor 1. More precisely one end of the shaft 6 is rotated by the electric motor 5, and another end of the shaft 6 rotates the wheel 3 of the compressor.
  • the assembly is disposed in a compressor body 8.
  • the compressor 1 conventionally comprises a volute 12 allowing the passage of air from the compressor 1.
  • the wheel 3 of the compressor is disposed in the volute 12.
  • the wheel of the compressor 1 is a paddle wheel.
  • the compressor 1 comprises an electronic assembly 9 for controlling the electric compressor 1.
  • electronic assembly 9 refers to the power and / or control electronics.
  • the electronic assembly is composed of at least one electronic control card, and / or a power module, and / or at least one filtering capacitor, and or at least one inductor, and / or at least one sensor.
  • the electronic assembly 9 is composed of the electronic control card, the power module, at least two filtering capacitors, at least two inductors.
  • the electronic assembly 9 is disposed at the rear 31 of the wheel 3 of the compressor 1.
  • the electronic assembly 9 is disposed at the rear 31 of the wheel 3 and co-axially with respect to the shaft 6 of the compressor 1.
  • the electronic assembly 9 is disposed between the wheel 3 of the compressor 1 and the engine 5.
  • the electric compressor 1 comprises a cooling circuit 10, illustrated in FIGS. Figures 1 and 3.
  • the cooling circuit 10 comprises at least two parts 101, 102.
  • a first portion 101 is disposed around the electric motor 5, parallel to the axis X of the electric compressor 1.
  • a second portion 102 of the cooling circuit 10 is disposed at the rear face 109 of the electronic assembly 9, perpendicular to the axis X of the electric compressor 1.
  • the rear face is defined with respect to the position of the wheel and the shaft. More specifically, the term rear face 902 of the electronic assembly 9, the part located opposite the wheel 3 relative to the longitudinal axis X of the shaft 6.
  • the two parts 101, 102 of the cooling circuit 10 form a single cooling duct.
  • the two parts 101, 102 of the cooling circuit 10 are formed by a molding process.
  • the molding method used is a high pressure die casting (or HPDC) method.
  • the molding method used is a low-pressure molding process.
  • the body 8 of the electric compressor 1 is made from a molding process under low or high pressure.
  • the body of the electric compressor 1 is thus formed of a single part forming the cooling circuit.
  • the body of the electric compressor 1 thus contains a demoldable cavity in at least two directions. As illustrated in FIG. 2, a first direction 11 is parallel to the axis X of the compressor 1 and a second direction 12 is perpendicular to the axis X of the compressor 1. It is this cavity that forms the cooling circuit 10 of the compressor 1 electric. It is thus possible to form the cavity with or without undercut, thus giving the possibility of having a demoldable body without destructive nuclei.
  • the compressor thus comprises a cooling circuit 10 comprising at least two openings 121, 122 towards the outside of the These two openings 121, 122 are the result of the pressure molding in two directions 11, 12. Specifically, each of the two parts 101, 102 of the cooling circuit 10 has an opening 121, 122.
  • a first opening 121 is disposed at the end of the compressor body 8 opposite that in which the wheel 3 of the compressor is located, in the X axis of the compressor, and a second opening 122 is disposed perpendicularly to the axis X of the compressor, on one side of the compressor at the assembly 9 electronic.
  • the cooling circuit 10 is closed by at least one additional cover. More precisely, according to one embodiment of the invention, the two openings 121, 122 of the cooling circuit 10 are each closed by an additional cover. These covers are made of plastic or any other material compatible with the cooling fluid circulating in the cooling circuit.
  • the advantage of a circuit according to the invention is to be able to cool the electric motor while cooling elements perpendicular or remote from the electric motor.
  • the cooling circuit 10 is traversed by a fluid which may be a gas or a liquid. Whatever the configuration of the cooling circuit 10, the latter comprises an inlet of the cooling fluid and an outlet of the cooling fluid.
  • the invention also relates to a method of manufacturing the cooling circuit 10 of the electric compressor 1.
  • the method comprises a step of molding the cooling circuit 10 under pressure.
  • An electric compressor 1 comprising a cooling circuit 10 according to the invention is used in a combustion engine, and for example an internal combustion engine or fuel cell.
  • the scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claimed invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The present invention relates to an electric compressor (1) comprising at least one compressor wheel (3) driven by an electric motor (5) controlled by an electronic assembly (9), and also comprising a cooling circuit (10), characterised in that the cooling circuit (10) is formed by a moulding process, e.g. pressure moulding.

Description

COMPRESSEUR ÉLECTRIQUE AVEC CIRCUIT DE REFROIDISSEMENT MOULÉ  ELECTRIC COMPRESSOR WITH MOLDED COOLING CIRCUIT

La présente invention concerne le domaine des compresseurs électriques, et plus particulièrement un compresseur électrique de suralimentation pour véhicule automobile avec un circuit de refroidissement. The present invention relates to the field of electric compressors, and more particularly to an electric supercharger for a motor vehicle with a cooling circuit.

Dans le cadre de l'invention, un compresseur électrique est un dispositif, utilisé pour suralimenter un moteur thermique, fonctionnant avec un moteur électrique entraînant une roue de compresseur et comportant un ensemble électronique. In the context of the invention, an electric compressor is a device used to supercharge a heat engine, operating with an electric motor driving a compressor wheel and having an electronic assembly.

Le compresseur électrique est placé sur la ligne d'admission d'air d'un moteur à combustion interne, en complément par exemple d'un turbocompresseur. Le compresseur électrique joue le même rôle que le turbocompresseur, à savoir augmenter la pression d'admission des gaz frais dans le moteur, mais est utilisé notamment lors des phases transitoires pour palier aux problèmes de temps de réponse du turbocompresseur. Dans de tels dispositifs, il est nécessaire de refroidir le moteur électrique ainsi que l'ensemble électronique. The electric compressor is placed on the air intake line of an internal combustion engine, in addition for example a turbocharger. The electric compressor plays the same role as the turbocharger, namely increase the intake pressure of the fresh gases in the engine, but is used in particular during transient phases to overcome turbocharger response time problems. In such devices, it is necessary to cool the electric motor as well as the electronic assembly.

Un des inconvénients des dispositifs actuels, provient du fait la fabrication et le montage d'une pièce comportant un circuit de refroidissement efficace est difficile. One of the drawbacks of the current devices, comes from the fact that the manufacture and assembly of a part comprising an efficient cooling circuit is difficult.

La présente invention a donc pour objet de pallier un ou plusieurs des inconvénients des dispositifs de l'art antérieur en proposant un compresseur électrique The present invention therefore aims to overcome one or more of the disadvantages of the devices of the prior art by proposing an electric compressor

Pour cela la présente invention propose un compresseur électrique comprenant au moins une roue de compresseur entraînée par un moteur électrique commandé par un ensemble électronique, et comportant un circuit de refroidissement, caractérisé en ce que le circuit de refroidissement est formé par un procédé de moulage, par exemple sous pression. For this purpose, the present invention proposes an electric compressor comprising at least one compressor wheel driven by an electric motor controlled by an electronic assembly, and comprising a cooling circuit, characterized in that the cooling circuit is formed by a molding process, for example under pressure.

Un tel mode de réalisation facilite la fabrication, et améliore l'étanchéité du circuit. Selon un mode de réalisation de l'invention, le circuit de refroidissement comprend au moins deux parties. Such an embodiment facilitates the manufacture, and improves the sealing of the circuit. According to one embodiment of the invention, the cooling circuit comprises at least two parts.

Selon un mode de réalisation de l'invention, une première partie du circuit de refroidissement est disposée autour du moteur électrique, parallèlement à un axe du compresseur électrique, et une deuxième partie du circuit de refroidissement est disposée au niveau de la face arrière de l'ensemble électronique, perpendiculairement à l'axe du compresseur électrique. According to one embodiment of the invention, a first portion of the cooling circuit is disposed around the electric motor, parallel to an axis of the electric compressor, and a second portion of the cooling circuit is disposed at the rear face of the electronic assembly, perpendicular to the axis of the electric compressor.

L'avantage d'une telle solution est de pouvoir faire un circuit d'eau pouvant refroidir le moteur électrique tout en refroidissant des éléments perpendiculaires ou éloigné du moteur électrique. The advantage of such a solution is to be able to make a water circuit that can cool the electric motor while cooling elements perpendicular or remote from the electric motor.

Selon un mode de réalisation de l'invention, les deux parties du circuit de refroidissement forment un seul conduit de refroidissement. According to one embodiment of the invention, the two parts of the cooling circuit form a single cooling duct.

Selon un mode de réalisation de l'invention, le circuit de refroidissement comporte au moins deux ouvertures vers l'extérieur du compresseur. Selon un mode de réalisation de l'invention, le circuit de refroidissement est fermé par au moins un capot additionnel. According to one embodiment of the invention, the cooling circuit comprises at least two openings towards the outside of the compressor. According to one embodiment of the invention, the cooling circuit is closed by at least one additional cover.

Selon un mode de réalisation de l'invention, les deux ouvertures du circuit de refroidissement sont fermées chacune par un capot additionnel. According to one embodiment of the invention, the two openings of the cooling circuit are each closed by an additional cover.

Selon un mode de réalisation de l'invention, le moteur électrique est un moteur à aimant permanent ou à reluctance variable. According to one embodiment of the invention, the electric motor is a permanent magnet or variable reluctance motor.

L'invention concerne également un procédé de fabrication du circuit de refroidissement du compresseur électrique selon l'invention comportant une étape de moulage sous pression du circuit de refroidissement. The invention also relates to a method of manufacturing the cooling circuit of the electric compressor according to the invention comprising a pressure molding step of the cooling circuit.

L'invention concerne également l'utilisation du compresseur électrique selon l'invention dans un moteur à combustion interne ou à pile à combustible. D'autres buts, caractéristiques et avantages de l'invention seront mieux compris et apparaîtront plus clairement à la lecture de la description faite, ci-après, en se référant aux figures annexées, données à titre d'exemple et dans lesquelles: The invention also relates to the use of the electric compressor according to the invention in an internal combustion engine or fuel cell. Other objects, features and advantages of the invention will be better understood and will appear more clearly on reading the description given hereinafter with reference to the appended figures given by way of example and in which:

- La figure 1 est une représentation schématique d'une vue en coupe d'un compresseur selon l'invention,  FIG. 1 is a schematic representation of a sectional view of a compressor according to the invention,

- La figure 2 est une représentation schématique d'une vue extérieure d'une partie d'un compresseur selon l'invention,  FIG. 2 is a schematic representation of an external view of a part of a compressor according to the invention,

- La figure 3 est une représentation schématique d'une vue en coupe d'une partie d'un compresseur selon l'invention.  - Figure 3 is a schematic representation of a sectional view of a portion of a compressor according to the invention.

La présente invention concerne un compresseur électrique 1. The present invention relates to an electric compressor 1.

Dans le cadre de l'invention, on entend par compresseur électrique 1, un compresseur d'air, volumétrique ou non et par exemple centrifuge ou radial, entraîné par un moteur électrique, dans le but de suralimenter un moteur thermique. Selon un mode de réalisation de l'invention, le moteur électrique est un moteur à courant continue ou alternatif, ou tout type de moteur électrique du même type. In the context of the invention, the term electric compressor 1, an air compressor, volumetric or not and for example centrifugal or radial, driven by an electric motor, for the purpose of supercharging a heat engine. According to one embodiment of the invention, the electric motor is a DC or AC motor, or any type of electric motor of the same type.

Selon un mode de réalisation de l'invention, le moteur électrique est un moteur à reluctance variable (également appelée machine SRM pour Switched Reluctance Motor selon la terminologie anglaise). Selon un autre mode de réalisation de l'invention, le moteur est un moteur à aimant permanent. According to one embodiment of the invention, the electric motor is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology). According to another embodiment of the invention, the motor is a permanent magnet motor.

La figure 1 illustre un exemple de compresseur 1 électrique. Le compresseur électrique 1 comprend au moins un moteur électrique 5, et une roue 3 de compresseur. Le moteur électrique 5 est disposé dans un logement 4 ou enveloppe 4 moteur. Le moteur électrique 5 comporte au moins un rotor et un stator. Le moteur électrique 5 permet la mise en rotation d'un arbre 6 du compresseur électrique via des roulements. L'arbre 6 entraine ainsi en rotation la roue 3 du compresseur 1. Plus précisément une extrémité de l'arbre 6 est entraînée en rotation par le moteur 5 électrique, et une autre extrémité de l'arbre 6 entraine en rotation la roue 3 du compresseur. L'ensemble est disposé dans un corps 8 de compresseur. Figure 1 illustrates an example of an electric compressor 1. The electric compressor 1 comprises at least one electric motor 5, and a compressor wheel 3. The electric motor 5 is disposed in a housing 4 or envelope 4 engine. The electric motor 5 comprises at least one rotor and a stator. The electric motor 5 allows the rotation of a shaft 6 of the electric compressor via bearings. The shaft 6 thus rotates the wheel 3 of the compressor 1. More precisely one end of the shaft 6 is rotated by the electric motor 5, and another end of the shaft 6 rotates the wheel 3 of the compressor. The assembly is disposed in a compressor body 8.

Selon un mode de réalisation de l'invention, le compresseur 1 comporte de manière classique une volute 12 permettant le passage de l'air du compresseur 1. La roue 3 du compresseur est disposée dans la volute 12. According to one embodiment of the invention, the compressor 1 conventionally comprises a volute 12 allowing the passage of air from the compressor 1. The wheel 3 of the compressor is disposed in the volute 12.

Selon un mode de réalisation de l'invention, la roue du compresseur 1 est une roue à aubes. According to one embodiment of the invention, the wheel of the compressor 1 is a paddle wheel.

Selon un mode de réalisation de l'invention, le compresseur 1 comporte un ensemble électronique 9 permettant de commander le compresseur 1 électrique. Dans le cadre de l'invention, on entend par ensemble électronique 9, l'électronique de puissance et/ou de contrôle. According to one embodiment of the invention, the compressor 1 comprises an electronic assembly 9 for controlling the electric compressor 1. In the context of the invention, the term "electronic assembly 9" refers to the power and / or control electronics.

Selon un mode de réalisation de l'invention, l'ensemble électronique est composé d'au moins une la carte de contrôle électronique, et/ou d'un module de puissance, et/ou d'au moins une capacité de filtrage, et/ou d'au moins une inductance, et/ou d'au moins un capteur. According to one embodiment of the invention, the electronic assembly is composed of at least one electronic control card, and / or a power module, and / or at least one filtering capacitor, and or at least one inductor, and / or at least one sensor.

Selon un mode de réalisation de l'invention, l'ensemble électronique 9 est composé de la carte de contrôle électronique, du module de puissance, d'au moins deux capacités de filtrage, d'au moins deux inductances. According to one embodiment of the invention, the electronic assembly 9 is composed of the electronic control card, the power module, at least two filtering capacitors, at least two inductors.

Selon un mode de réalisation, de l'invention, l'ensemble électronique 9 est disposé à l'arrière 31 de la roue 3 du compresseur 1. According to one embodiment of the invention, the electronic assembly 9 is disposed at the rear 31 of the wheel 3 of the compressor 1.

Selon un mode de réalisation de l'invention l'ensemble électronique 9 est disposé à l'arrière 31 de la roue 3 et co-axialement par rapport à l'arbre 6 du compresseur 1. According to one embodiment of the invention, the electronic assembly 9 is disposed at the rear 31 of the wheel 3 and co-axially with respect to the shaft 6 of the compressor 1.

Selon un mode de réalisation de l'invention, l'ensemble électronique 9 est disposé entre la roue 3 du compresseur 1 et le moteur 5. Dans le cadre de l'invention le compresseur électrique 1 comporte un circuit 10 de refroidissement, illustré sur les figures 1 et 3. Le circuit 10 de refroidissement comprend au moins deux parties 101, 102. Une première partie 101 est disposée autour du moteur électrique 5, parallèlement à l'axe X du compresseur électrique 1. Une deuxième partie 102 du circuit 10 de refroidissement est disposée au niveau de la face arrière 109 de l'ensemble électronique 9, perpendiculairement à l'axe X du compresseur électrique 1. According to one embodiment of the invention, the electronic assembly 9 is disposed between the wheel 3 of the compressor 1 and the engine 5. In the context of the invention, the electric compressor 1 comprises a cooling circuit 10, illustrated in FIGS. Figures 1 and 3. The cooling circuit 10 comprises at least two parts 101, 102. A first portion 101 is disposed around the electric motor 5, parallel to the axis X of the electric compressor 1. A second portion 102 of the cooling circuit 10 is disposed at the rear face 109 of the electronic assembly 9, perpendicular to the axis X of the electric compressor 1.

Dans le cadre de l'invention, la face arrière est définie par rapport à la position de la roue et l'arbre. Plus précisément, on entend par face arrière 902 de l'ensemble électronique 9, la partie située à l'opposé de la roue 3 par rapport à l'axe X longitudinal de l'arbre 6. In the context of the invention, the rear face is defined with respect to the position of the wheel and the shaft. More specifically, the term rear face 902 of the electronic assembly 9, the part located opposite the wheel 3 relative to the longitudinal axis X of the shaft 6.

Selon un mode de réalisation de l'invention, les deux parties 101, 102 du circuit 10 de refroidissement forment un seul conduit de refroidissement. Dans le cadre de l'invention, les deux parties 101, 102 du circuit 10 de refroidissement sont formées par un procédé de moulage. According to one embodiment of the invention, the two parts 101, 102 of the cooling circuit 10 form a single cooling duct. In the context of the invention, the two parts 101, 102 of the cooling circuit 10 are formed by a molding process.

Selon un mode de réalisation de l'invention, le procédé de moulage utilisé est un procédé de moulage sous haute pression (ou HPDC pour High Pressure Die Casting selon la terminologie anglaise). Selon un autre mode de réalisation de l'invention, le procédé de moulage utilisé est un procédé de moulage sous basse pression. According to one embodiment of the invention, the molding method used is a high pressure die casting (or HPDC) method. According to another embodiment of the invention, the molding method used is a low-pressure molding process.

Plus précisément, le corps 8 du compresseur électrique 1 est réalisé à partir d'un procédé de moulage sous basse ou haute pression. Le corps du compresseur 1 électrique est ainsi formé d'une seule partie formant le circuit 10 de refroidissement. Le corps du compresseur 1 électrique contient ainsi une cavité démoulable dans au moins deux directions. Comme illustré figure 2, une première 11 direction est parallèle à l'axe X du compresseur 1 et une deuxième 12 direction est perpendiculaire à l'axe X du compresseur 1. C'est cette cavité qui forme le circuit 10 de refroidissement du compresseur 1 électrique. II est ainsi possible de former la cavité avec ou sans contre dépouille, donnant ainsi la possibilité d'avoir un corps démoulable sans noyaux destructif. More specifically, the body 8 of the electric compressor 1 is made from a molding process under low or high pressure. The body of the electric compressor 1 is thus formed of a single part forming the cooling circuit. The body of the electric compressor 1 thus contains a demoldable cavity in at least two directions. As illustrated in FIG. 2, a first direction 11 is parallel to the axis X of the compressor 1 and a second direction 12 is perpendicular to the axis X of the compressor 1. It is this cavity that forms the cooling circuit 10 of the compressor 1 electric. It is thus possible to form the cavity with or without undercut, thus giving the possibility of having a demoldable body without destructive nuclei.

Comme illustré sur les figures 1 et 2, le compresseur comporte ainsi un circuit 10 de refroidissement comportant au moins deux ouvertures 121, 122 vers l'extérieur du compresseur 1. Ces deux ouvertures 121, 122 sont le résultat du moulage sous pression dans deux directions 11, 12. Plus précisément, chacune des deux parties 101, 102 du circuit 10 de refroidissement comporte une ouverture 121, 122. As illustrated in FIGS. 1 and 2, the compressor thus comprises a cooling circuit 10 comprising at least two openings 121, 122 towards the outside of the These two openings 121, 122 are the result of the pressure molding in two directions 11, 12. Specifically, each of the two parts 101, 102 of the cooling circuit 10 has an opening 121, 122.

Selon un mode de réalisation de l'invention, une première ouverture 121 est disposé à l'extrémité du corps 8 de compresseur opposée à celle où se trouve la roue 3 du compresseur, dans l'axe X du compresseur, et une deuxième ouverture 122 est disposée perpendiculairement à l'axe X du compresseur, sur un coté du compresseur au niveau de l'ensemble 9 électronique. According to one embodiment of the invention, a first opening 121 is disposed at the end of the compressor body 8 opposite that in which the wheel 3 of the compressor is located, in the X axis of the compressor, and a second opening 122 is disposed perpendicularly to the axis X of the compressor, on one side of the compressor at the assembly 9 electronic.

Selon un mode de réalisation de l'invention, le circuit 10 de refroidissement est fermé par au moins un capot additionnel. Plus précisément, selon un mode de réalisation de l'invention, les deux ouvertures 121, 122 du circuit 10 de refroidissement sont fermées chacune par un capot additionnel. Ces capots sont en plastique ou tout autre matière compatible avec le fluide de refroidissement circulant dans le circuit 10 de refroidissement L'avantage d'un circuit selon l'invention, est de pouvoir refroidir le moteur électrique tout en refroidissant des éléments perpendiculaires ou éloignés du moteur électrique. According to one embodiment of the invention, the cooling circuit 10 is closed by at least one additional cover. More precisely, according to one embodiment of the invention, the two openings 121, 122 of the cooling circuit 10 are each closed by an additional cover. These covers are made of plastic or any other material compatible with the cooling fluid circulating in the cooling circuit. The advantage of a circuit according to the invention is to be able to cool the electric motor while cooling elements perpendicular or remote from the electric motor.

Le circuit 10 de refroidissement est parcouru par un fluide qui peut être un gaz ou un liquide. Quelque soit la configuration du circuit 10 de refroidissement, ce dernier comporte une entrée du fluide refroidissement et une sortie du fluide de refroidissement. The cooling circuit 10 is traversed by a fluid which may be a gas or a liquid. Whatever the configuration of the cooling circuit 10, the latter comprises an inlet of the cooling fluid and an outlet of the cooling fluid.

L'invention concerne également un procédé de fabrication du circuit 10 de refroidissement du compresseur 1 électrique. Selon un mode de réalisation, le procédé comporte une étape de moulage sous pression du circuit 10 de refroidissement. Un compresseur 1 électrique comportant un circuit 10 de refroidissement selon l'invention est utilisé dans un moteur à combustion, et par exemple un moteur à combustion interne ou à pile à combustible. La portée de la présente invention ne se limite pas aux détails donnés ci-dessus et permet des modes de réalisation sous de nombreuses autres formes spécifiques sans s'éloigner du domaine d'application de l'invention. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration, et peuvent être modifiés sans toutefois sortir de la portée définie par l'invention revendiquée. The invention also relates to a method of manufacturing the cooling circuit 10 of the electric compressor 1. According to one embodiment, the method comprises a step of molding the cooling circuit 10 under pressure. An electric compressor 1 comprising a cooling circuit 10 according to the invention is used in a combustion engine, and for example an internal combustion engine or fuel cell. The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claimed invention.

Claims

REVENDICATIONS 1. Compresseur électrique (1) comprenant au moins une roue (3) de compresseur entraînée par un moteur électrique (5) commandé par un ensemble électronique (9), et comportant un circuit (10) de refroidissement, caractérisé en ce que le circuit (10) de refroidissement est formé par un procédé de moulage, par exemple sous pression. Electric compressor (1) comprising at least one compressor wheel (3) driven by an electric motor (5) controlled by an electronic assembly (9), and having a cooling circuit (10), characterized in that the circuit (10) is formed by a molding method, for example under pressure. 2. Compresseur électrique (1) selon la revendication 1, dans lequel le circuit (10) de refroidissement comprend au moins deux parties (101, 102). The electric compressor (1) according to claim 1, wherein the cooling circuit (10) comprises at least two parts (101, 102). 3. Compresseur électrique (1) selon la revendication 2, dans lequel une première partie (101) du circuit (10) de refroidissement est disposée autour du moteur électriqueAn electric compressor (1) according to claim 2, wherein a first portion (101) of the cooling circuit (10) is disposed around the electric motor (5), parallèlement à un axe X du compresseur électrique (1), et une deuxième partie (102) du circuit (10) de refroidissement est disposée au niveau de la face arrière (902) de l'ensemble électronique 9, perpendiculairement à l'axe X du compresseur électrique 1. (5), parallel to an axis X of the electric compressor (1), and a second portion (102) of the cooling circuit (10) is disposed at the rear face (902) of the electronic assembly 9, perpendicular to the X axis of the electric compressor 1. 4. Compresseur électrique (1) selon une des revendications 2 ou 3, dans lequel les deux parties (101, 102) du circuit (10) de refroidissement forment un seul conduit de refroidissement. 4. Electric compressor (1) according to one of claims 2 or 3, wherein the two parts (101, 102) of the cooling circuit (10) form a single cooling duct. 5. Compresseur électrique (1) selon une des revendications 1 à 4, dans lequel le circuit (10) de refroidissement comporte au moins deux ouvertures (121, 122) vers l'extérieur du compresseur (1). 5. Electric compressor (1) according to one of claims 1 to 4, wherein the cooling circuit (10) comprises at least two openings (121, 122) to the outside of the compressor (1). 6. Compresseur électrique (1) selon une des revendications 1 à 5, dans lequel le circuit (10) de refroidissement est fermé par au moins un capot (221, 222) additionnel. 6. Electric compressor (1) according to one of claims 1 to 5, wherein the cooling circuit (10) is closed by at least one cover (221, 222) additional. 7. Compresseur électrique (1) selon la revendication 5, dans lequel les deux ouvertures (121, 122) du circuit (10) de refroidissement sont fermées chacune par un capot (221, 222) additionnel. Electric compressor (1) according to claim 5, wherein the two openings (121, 122) of the cooling circuit (10) are each closed by an additional cover (221, 222). 8. Compresseur électrique (1) selon une des revendications 1 à 7, dans lequel le moteur électrique (5) est un moteur à aimant permanent ou à reluctance variable. 8. Electric compressor (1) according to one of claims 1 to 7, wherein the electric motor (5) is a permanent magnet motor or variable reluctance. 9. Procédé de fabrication du circuit (10) de refroidissement du compresseur (1) électrique selon une des revendications 1 à 8 comportant une étape de moulage sous pression du circuit (10) de refroidissement. 9. A method of manufacturing the circuit (10) for cooling the compressor (1) electric according to one of claims 1 to 8 comprising a pressure molding step of the circuit (10) cooling. 10. Utilisation du compresseur électrique (1) selon une des revendications précédentes dans un moteur à combustion interne ou à pile à combustible. 10. Use of the electric compressor (1) according to one of the preceding claims in an internal combustion engine or fuel cell.
PCT/FR2017/050865 2016-04-11 2017-04-11 Electric compressor with moulded cooling circuit Ceased WO2017178748A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1653160 2016-04-11
FR1653160A FR3049994A1 (en) 2016-04-11 2016-04-11 ELECTRIC COMPRESSOR WITH COOLING CIRCUIT

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WO2017178748A1 true WO2017178748A1 (en) 2017-10-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014209870A1 (en) * 2013-06-28 2014-12-31 Borgwarner Inc. Supercharger for a combustion engine
WO2015017362A1 (en) * 2013-08-02 2015-02-05 Borgwarner Inc. Coil for a compressor which can be electrically driven, and corresponding production method
WO2016000930A1 (en) * 2014-07-02 2016-01-07 Pierburg Gmbh Electrical compressor for an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014209870A1 (en) * 2013-06-28 2014-12-31 Borgwarner Inc. Supercharger for a combustion engine
WO2015017362A1 (en) * 2013-08-02 2015-02-05 Borgwarner Inc. Coil for a compressor which can be electrically driven, and corresponding production method
WO2016000930A1 (en) * 2014-07-02 2016-01-07 Pierburg Gmbh Electrical compressor for an internal combustion engine

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