EP3231065A1 - Machine électrique - Google Patents
Machine électriqueInfo
- Publication number
- EP3231065A1 EP3231065A1 EP15821117.7A EP15821117A EP3231065A1 EP 3231065 A1 EP3231065 A1 EP 3231065A1 EP 15821117 A EP15821117 A EP 15821117A EP 3231065 A1 EP3231065 A1 EP 3231065A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- machine
- electric machine
- electrical machine
- compression
- 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- Withdrawn
Links
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 230000000295 complement effect Effects 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/223—Heat bridges
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
- H02K19/103—Motors having windings on the stator and a variable reluctance soft-iron rotor without windings
Definitions
- the present invention relates to the field of electrical machines, and more particularly relates to electric machines for electric compressor, and for example an electric supercharger.
- An electric machine is a machine, also called a motor, which has at least one stator.
- the stator has teeth around which the coils are surrounded.
- the supply of each of the coils allows the creation of a magnetic field in the stator, a rotor oriented along the field lines.
- these electrical machines are for example used in electric compressors.
- these machines are used on the air intake circuit to improve the efficiency of the vehicle, to overcome the latency of the conventional turbocharger at startup, or in the transient phases of the vehicle.
- this type of machine is a source of noise.
- the vibrations of the motor can interfere with the resonance frequency of the machine and generate additional vibrations and thus micro-displacements at high frequency and in the audible range of the human ear.
- the vibrations are transmitted throughout the structure of the machine, and propagate in the air and in the supports of the machine. If the noise from the machine to the support can be reduced by dampers, the noise intrinsic to the machine is more difficult to deal with.
- One solution to this noise is to reduce the effects of radial forces.
- the effects of radial forces are reduced, for example, by providing material recesses on the outer face of the stator, in the extension of the stator teeth.
- Such a solution allows a gain of deformation, to reduce the radial forces on the workpiece in contact with the stator. This gain contributes to the partial reduction of noise, which is still audible by a human ear.
- the present invention therefore aims to overcome one or more of the disadvantages of the machines of the prior art by providing an electrical machine configured to limit noise.
- the present invention proposes an electric machine, comprising at least one stator, and noise reduction means comprising at least acoustic insulation means of the stator relative to the rest of the electrical machine.
- the acoustic insulation means are axial isolation means.
- the axial isolation means are formed by at least two joints arranged at the axial ends 610 of the stator.
- At least a portion of the seal is in compression with the surface of the end of the stator.
- the number of portions in compression is determined as a function of the stator mass.
- the compression portion is made by the joint itself.
- the compression portion is made by a complementary piece which compresses some local areas of the joint.
- the machine comprises radial heat dissipation means are formed by resin covering at least a portion of the outer radial surface of the stator.
- the invention also relates to the use of the electric machine according to the invention in an electric supercharger for a motor vehicle.
- the invention also relates to an electric supercharger equipped with an electric machine according to the invention.
- FIG. 1 is a schematic representation of a cross-sectional view of the device concerned by the present invention
- FIG. 2 is a schematic representation of a longitudinal sectional view of the device according to the invention integrated in an electric compressor
- FIG. 3 is a schematic representation of a detail A of FIG. 3 according to the invention.
- FIG. 4 is a schematic representation of the additional piece according to the invention.
- FIG. 5 is a schematic representation of a variant of an axial sound insulation means according to the invention.
- the present invention relates to an electric machine 1.
- the electric machine 1 comprises at least one stator 2, illustrated in FIGS. 1 and 3.
- the electric machine also comprises a rotor 3 disposed inside the stator 2. More precisely, the rotor 3 is disposed in a space 4 formed in the center of the stator 2.
- the stator is disposed in a recess formed in the body 110 of the electric machine, illustrated in FIG.
- the electrical machine is a continuous or alternating current machine, synchronous, or any type of electric machine of the same type.
- the electrical machine is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).
- the electric machine is a permanent magnet motor.
- the stator 2 is formed of at least one body 21. According to one embodiment of the invention, the stator is in one piece. According to one embodiment of the invention, the stator is formed of several bodies. The stator is also formed of several teeth 22. The teeth 22 are disposed on the internal face 221 of the stator body delimiting the space 4 in which the rotor is located. The stator 2 has n teeth 22, n being greater than or equal to 4, preferably between 4 and 20, preferably between 4 and 12, and very preferably equal to 6. Around each of the teeth 22 is arranged a winding which thus forms the coils 23 of the stator. The supply of each of the coils 23 allows the creation of a magnetic field in the stator 2.
- the rotor 3 comprises rotor teeth 32 oriented along the field lines of the stator 2.
- the number of teeth of the rotor 3 is between 2 and 8, and preferably is equal to 4.
- the noise reduction means comprise acoustic insulation means of the stator relative to the rest of the electrical machine.
- the axial sound insulation means 6, 61 “are formed by at least two seals 6, 61" disposed at the radial ends 610 of the stator 2.
- the axial ends 610 of the stator correspond to both external surfaces of the stator 2 arranged perpendicular to the axis 31 of the stator 2.
- the longitudinal axis 31 of the stator is defined as the axis 31 along which the stator extends, passing through the center of the stator, that is to say the axis 31 around which is disposed the stator and the axis of rotation of the rotor.
- the seals 6, 61 are elastomer seals.
- the seals are of the fluoroelastomer type (FKM, peroxide FKM) hydrogenated nitrile rubbers (HNBR for hydrogenated nitrile butadiene rubber according to English terminology ) or ethylene-propylene-diene monomer (EPDM).
- FKM fluoroelastomer type
- HNBR hydrogenated nitrile rubbers
- EPDM ethylene-propylene-diene monomer
- the joints 61 ', 61 are arranged at the periphery of the surface 610 forming the ends of the stator 2.
- the term compression portion a compression point of the seal against the surface 600 of the end of the stator. That is to say an area whose contact pressure is higher than the other areas of contact of the seal with the surface of the end of the stator.
- the number of portions in compression is determined as a function of the stator mass. That is, the higher the mass, the more points of contact may be required.
- At least six portions of the gasket 6, 61 are in compression with the surface of the end of the stator.
- At least eight portions of the seal 61 ' are provided.
- the compression portion is made by the gasket 6, 61 "itself, that is to say that the gasket has relief elements 611 allowing a greater contact with the surface 160 of the end of the stator 2.
- the raised elements 611 are protuberances which have all forms to ensure contact with the surface of the end of the stator
- the relief elements are shaped hump, cone or plane.
- the compression portion is made by a complementary part 7 which locally compresses certain zones of the gasket 6, 61. More specifically, the complementary piece 7 comes to press the gasket 6, 61 against the end surface 160 of the stator 2. The plating is made more strongly in certain areas, it is the portions of compressions.
- the complementary piece 7 is a circular piece 71 whose diameter is adapted so that the piece cooperates with the seal 61 ',
- the complementary piece 7 comprises raised zones 72. It is these zones 72 which, when the complementary piece 7 is pressed against the gasket 6, 61 ", exerts a complementary pressure on certain zones.
- the areas in relief are for example bumps, cones or plane.
- the complementary piece 7 is made of aluminum.
- the complementary piece 7 is any part making it possible to achieve these points of compression.
- the electric machine 1 comprises heat transfer means 5. More specifically, the heat transfer means 5 are radial heat dissipation means.
- the heat dissipation means 5 are formed by resin covering the outer radial surface of the stator 2.
- the radial surface of the stator is the outer face 222 of the stator 2. This is the face which does not have a tooth 22 and which is disposed outside the stator 2 if we consider the internal face 221 of the stator delimits an area 4 of the stator 2 in which the rotor 3 is placed.
- the resin 5 completely bridges the gap between the radial surface of the stator 2 and the body 110 of the electric machine 1.
- the resin fills a portion of the vacuum between the radial surface of the stator 2 and the body 110 of the electric machine 1. More specifically, one or more portions of the vacuum are filled by the resin.
- the hardness and the damping coefficient of the resin are chosen so that it does not interfere with the radial forces, so as not to increase the noise caused by the machine, but that it allows a sufficient heat transfer. Indeed, it is important that the heat of the electric machine is not stored in the electric machine but is dissipated to the outside. This prevents overheating of the machine, including its electronic system.
- the resin is a flexible resin.
- the resin has a hardness less than or equal to 80 shore A, preferably less than or equal to 60 shore A, very preferably less than or equal to 40 shore A.
- the electric machine when the stator 2 is formed of several parts, the electric machine comprises an aluminum ring 120 disposed between the stator 2 and the resin 5.
- Such an electric machine according to the invention allows a gain of 5 to 15 dB depending on the rotational speed of the engine of the vehicle in which the machine is used.
- the noise emitted by the electric machine is thus no longer considered a noise nuisance for the human ear.
- the invention also relates to the use of such a machine according to the invention in an electric supercharger compressor 10 for a motor vehicle.
- the invention also relates to an electric supercharger compressor 10 equipped with such a machine 1 according to the invention. More specifically, the invention also relates to an electric compressor 10 equipped with a variable reluctance motor according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1462272A FR3029963B1 (fr) | 2014-12-11 | 2014-12-11 | Machine electrique |
PCT/FR2015/053445 WO2016092229A1 (fr) | 2014-12-11 | 2015-12-11 | Machine électrique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3231065A1 true EP3231065A1 (fr) | 2017-10-18 |
Family
ID=52824343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15821117.7A Withdrawn EP3231065A1 (fr) | 2014-12-11 | 2015-12-11 | Machine électrique |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180131249A1 (fr) |
EP (1) | EP3231065A1 (fr) |
CN (1) | CN107210631A (fr) |
FR (1) | FR3029963B1 (fr) |
WO (1) | WO2016092229A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3075498B1 (fr) * | 2017-12-19 | 2020-08-07 | Valeo Systemes De Controle Moteur | Machine electrique |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011104764A1 (fr) * | 2010-02-26 | 2011-09-01 | 三菱電機株式会社 | Machine rotative et procédé de fabrication associé |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3539853A (en) * | 1968-10-30 | 1970-11-10 | Westinghouse Electric Corp | Heat transfer arrangement for magnetic poles in electromagnetic devices |
DE2428905C3 (de) * | 1974-06-14 | 1982-03-25 | Siemens AG, 1000 Berlin und 8000 München | Elektrische Maschine mit körperschallisoliert aufgestellter Haube mit Wellendurchführung und außerhalb der Haube befindlichem Lager |
FR2596930A1 (fr) * | 1986-04-08 | 1987-10-09 | Ducellier & Cie | Machine dynamo-electrique, notamment alternateur de vehicule automobile |
US5945756A (en) * | 1997-10-07 | 1999-08-31 | Siemens Canada Limited | Ultra quiet electric motor for automotive applications |
US5917258A (en) * | 1997-10-08 | 1999-06-29 | Siemens Canada Limited | Bearing assembly for an ultra quiet electric motor |
DE10019914A1 (de) * | 1999-04-30 | 2001-02-01 | Valeo Equip Electr Moteur | Durch ein internes Kühlmittel gekühlter Wechselstromgenerator für Kraftfahrzeuge |
DE19960088A1 (de) * | 1999-12-14 | 2001-03-15 | Daimler Chrysler Ag | Elektrische Maschine mit einem Gehäuse |
DE10018156A1 (de) * | 2000-04-12 | 2001-10-25 | Bosch Gmbh Robert | Elektromotor |
US7061147B2 (en) * | 2001-08-30 | 2006-06-13 | Siemens Aktiengesellschaft | Superconducting electrical machines for use in navy ships |
DE10143713B4 (de) * | 2001-08-30 | 2005-11-03 | Siemens Ag | Elektrische Antriebseinrichtung für ein Schiff |
DE10337915A1 (de) * | 2003-08-18 | 2005-04-14 | Vorwerk & Co. Interholding Gmbh | Reluktanzmotor |
JP2007215380A (ja) * | 2006-02-13 | 2007-08-23 | Asmo Co Ltd | モータ |
FR2980526B1 (fr) * | 2011-09-27 | 2015-01-30 | Valeo Sys Controle Moteur Sas | Moteur suralimente par turbocompresseur equipe de moyens de reduction du temps d'activation du turbocompresseur |
FR2983262B1 (fr) * | 2011-11-30 | 2016-09-02 | Valeo Systemes Thermiques | Support-moteur a manchon de refroidissement amorti et groupe moto-ventilateur integrant un tel support-moteur |
CN203434763U (zh) * | 2013-09-05 | 2014-02-12 | 中国矿业大学 | 一种新型磁阻电机开闭装置 |
-
2014
- 2014-12-11 FR FR1462272A patent/FR3029963B1/fr active Active
-
2015
- 2015-12-11 WO PCT/FR2015/053445 patent/WO2016092229A1/fr active Application Filing
- 2015-12-11 EP EP15821117.7A patent/EP3231065A1/fr not_active Withdrawn
- 2015-12-11 CN CN201580075485.3A patent/CN107210631A/zh active Pending
- 2015-12-11 US US15/534,785 patent/US20180131249A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011104764A1 (fr) * | 2010-02-26 | 2011-09-01 | 三菱電機株式会社 | Machine rotative et procédé de fabrication associé |
Also Published As
Publication number | Publication date |
---|---|
WO2016092229A1 (fr) | 2016-06-16 |
CN107210631A (zh) | 2017-09-26 |
FR3029963B1 (fr) | 2020-01-17 |
US20180131249A1 (en) | 2018-05-10 |
FR3029963A1 (fr) | 2016-06-17 |
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Ipc: F02B 39/10 20060101ALI20231113BHEP Ipc: H02K 19/10 20060101ALI20231113BHEP Ipc: H02K 9/22 20060101ALI20231113BHEP Ipc: H02K 1/18 20060101AFI20231113BHEP |
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Owner name: VALEO ELECTRIFICATION |