EP4158754A1 - Rotor pour moteur électrique muni d'un circuit de refroidissement - Google Patents
Rotor pour moteur électrique muni d'un circuit de refroidissementInfo
- Publication number
- EP4158754A1 EP4158754A1 EP21733499.4A EP21733499A EP4158754A1 EP 4158754 A1 EP4158754 A1 EP 4158754A1 EP 21733499 A EP21733499 A EP 21733499A EP 4158754 A1 EP4158754 A1 EP 4158754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- shaft
- flange
- face
- channel
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims description 7
- 239000012809 cooling fluid Substances 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- 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
- H02K7/003—Couplings; Details of shafts
-
- 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
Definitions
- the invention relates to a rotor for an electric motor arranged to allow better removal of the heat generated during its operation.
- the invention also relates to an electric motor comprising such a rotor.
- current electric motors include a rotor integral with a shaft and a stator which surrounds the rotor.
- the stator is mounted in a housing which has bearings for the rotational mounting of the shaft.
- the rotor comprises a body formed by a stack of sheets or pole wheels (claw pole) held in the form of a package by means of a suitable fixing system.
- the rotor body has internal cavities housing permanent magnets.
- the stator comprises a body formed by a stack of sheets forming a ring, the inner face of which is provided with teeth delimiting in pairs a plurality of notches open towards the interior of the stator body and intended to receive phase windings.
- phase windings pass through the notches of the stator body and form buns projecting on either side of the stator body.
- the phase windings can for example consist of a plurality of U-shaped conductor segments, the free ends of two adjacent segments being connected together by welding.
- the pack of sheets is clamped axially between a front flange and a rear flange mounted coaxially with the shaft.
- Each flange has the overall shape of a disc extending in a radial plane perpendicular to the axis of the shaft.
- Each flange comprises a central orifice for coaxial mounting on the shaft and several through holes intended to receive fixing screws axially passing through the entire package of sheets, said screws being secured to the flanges by means of nuts.
- the front and rear flanges are generally formed from a non-magnetic material which conducts heat, for example a metal.
- the housing generally has front and rear bearings assembled together.
- the bearings define an internal cavity in which the rotor and the stator are housed.
- Each of the bearings centrally carries a ball bearing for the rotational mounting of the rotor shaft.
- the invention therefore aims to provide a rotor and an electric motor comprising such a rotor arranged to allow better removal of the heat generated during its operation and which does not have the drawbacks of the existing solutions described above.
- This invention also makes it possible to use the same cooling circuit to cool both the permanent magnets of the stator and the chignons of the stator of this electric motor.
- the invention relates to a rotor for an electric motor comprising:
- a pack of sheets mounted coaxially on the rotor shaft, said pack of sheets extending between a front side face and a rear side face and comprising first internal cavities;
- a front flange and a rear flange in the form of a disc mounted coaxially on the rotor shaft and arranged axially on either side of the pack of sheets so as to be contiguous respectively to the front and rear side faces of the pack of sheets ; characterized in that the shaft is provided with at least one internal channel for circulating a cooling fluid, called the inlet channel, and in that the front flange, respectively the rear flange, is configured to form with the front side face, respectively the rear side face, of the sheet bundle at least one front outlet channel, respectively at least one rear outlet channel, inside which a cooling fluid can circulate, said at least one flow channel front outlet, respectively rear, being in fluid communication with the inlet channel, and opening out at at least one outlet opening situated at the outer periphery of said front flange, respectively of said rear flange.
- the shaft is provided with at least one internal channel for circulating a cooling fluid, called the inlet channel
- the front flange, respectively the rear flange is configured to form with the
- the rotor of the invention will make it possible to better evacuate the heat generated during its use, due to the passage of a cooling fluid in the front and rear outlet channels formed inside the front and rear flanges and which are contiguous to the sheet metal pack and to the permanent magnets. Furthermore, said output channels opening out at the level of the outer periphery of each of the flanges, the cooling fluid can then be directed towards the stator chignons by adequately positioning the outlet openings provided at this level in each of the flanges. An additional heat dissipation can thus be obtained. In addition, the fact of circulating the coolant through the end flanges generates little change in the general structure of the electric motor and, therefore, offers a relatively inexpensive solution to the problem of evacuation. of heat in electric motors.
- the shaft comprises a hollow front end portion and a solid rear end portion separated from the front end portion by a hollow central portion, the front end portion and the central portion being crossed by a central cavity cylindrical in shape, said central cavity forming the inlet channel of the shaft, and in that at least one hole oriented radially with respect to the axis of the shaft is formed inside the portion of front end, respectively of the central portion, so as to open out, on one side, into the inlet channel and, on the other side, into said at least one front outlet channel, respectively said at least one outlet channel rear exit.
- the shaft comprises a main body provided with a blind hole aligned along the axis of the shaft, said blind hole comprising two contiguous sections of different internal diameters, namely a first section having a first internal diameter and a second section having a second internal diameter, the inlet channel of the shaft being jointly defined by the first section and by the second section of the blind hole.
- each of the front and rear flanges has an internal face in contact with a lateral face of the pack of sheets, said internal face being provided with at least one groove extending radially from a recessed central zone of said flange, at the level of which said groove is in fluid communication with the inlet channel of the shaft, up to a peripheral face of said flange, said at least one groove forming with the corresponding lateral face of the pack of sheets the front or rear outlet channel.
- Said at least one groove has a specific profile allowing it to optimize the contact surfaces between the front outlet channel, respectively rear, and the permanent magnets housed in the stack of sheets.
- At least one groove is formed by a succession of contiguous radial and orthoradial segments, said segments defining a baffle profile intended to increase the path to be covered by the cooling fluid during its circulation in the front outlet channel, respectively rear, with respect to a path which would be radially direct between the central zone and the peripheral face of said front, respectively rear flange.
- the internal face of the front flange, respectively rear, is provided with a plurality of grooves extending radially from a recessed central zone of said front flange, respectively rear, at which said grooves are in fluid communication with the channel of entry of the shaft, up to a peripheral face of said front, respectively rear flange, said grooves forming with the corresponding lateral face of the pack of sheets a plurality of front outlet channels, respectively rear.
- each of said grooves faces a radial hole formed through the shaft, said radial hole emerging, on one side, on the inlet channel of the shaft and, on the other side, on the peripheral wall of the tree.
- - permanent magnets are made of ferrite.
- - permanent magnets are made of rare earth.
- At least one of the front and rear flanges is made of plastic.
- the invention also relates to an electric motor comprising a rotor as defined above and an annular stator which surrounds the rotor coaxially with the shaft, chumbles projecting axially on either side of the stator, characterized by the causes that the outlet opening, respectively each of the outlet openings, through which the cooling fluid of the front and rear flanges exits, is axially aligned with the chignons so as to allow cooling of said chignons by means of said cooling fluid cooling.
- FIG. 1 is a longitudinal sectional view of a rotor according to a first embodiment of the invention
- FIG. 2 is a longitudinal sectional view of an electric motor incorporating the rotor according to FIG. 1
- FIG. 3 is a perspective view of the shaft used in the rotor of FIG. 1
- FIG. 4 is a longitudinal sectional view of the shaft of FIG. 3,
- FIG. 5 is a rear axial view of the rotor according to FIG. 1, the rear flange having been removed,
- FIG. 6 is a perspective view of the internal face of the front flange used in the rotor of FIG. 1,
- FIG. 7 is an axial view of the internal face of the flange of FIG. 6,
- FIG. 8 is a rear axial view of a rotor according to a second embodiment of the invention, the rear flange having been removed,
- FIG. 9 is an axial view of the internal face of the front flange used in the rotor of FIG. 8.
- an axial orientation refers to an orientation parallel to the axis of rotation of the rotor and a radial orientation refers to an orientation perpendicular to the axis of rotation of the rotor.
- An orthoradial orientation refers to an orientation perpendicular to a radial orientation in a plane perpendicular to the axis of rotation of the rotor.
- front and rear refer to separate positions along the axis of rotation of the rotor.
- the "front" end of the rotor shaft corresponds to the end of the shaft on which can be fixed a pulley, a pinion, a spline intended (e) to transmit the rotational movement.
- rotor to any other similar device for transmitting movements.
- FIG. 1 represents a rotor 10 according to a first embodiment of the invention.
- the rotor 10 comprises a substantially cylindrical body formed by a bundle of sheets 14 made of a ferromagnetic material, in particular steel, said body being integral in rotation with a shaft 12 mounted to rotate about an axis X.
- the rotor 10 further comprises a plurality of permanent magnets 15 intended to be housed in a plurality of internal cavities 141 formed inside the bundle of sheets 14, each of the internal cavities 141 accommodating at least one permanent magnet 15.
- the magnets 15 could be made of ferrite, for example.
- the cavities 141 extend in a radial direction relative to the X axis and are axially traversing.
- the magnets 15 are orthoradial magnetization, that is to say that the two end faces of each magnet 15 which are adjacent to each other in the orthoradial direction are magnetized so as to be able to generate a magnetic flux in an orthoradial orientation with respect to the X axis.
- the packet of sheets 14 is formed from an axial stack of sheets which extend in a radial plane perpendicular to the X axis of the shaft 12 or from a sheet wound on itself (Slinky sheet).
- the pack of sheets 14 is mounted coaxially on the shaft 12.
- the shaft 12 can be force-fitted inside a central opening of the pack of sheets 14 so as to rotate the body of the rotor with the. shaft 12.
- a plurality of fixing holes 11 are made in the pack of sheets 14 to allow the passage of fastening screws 13 intended to fix end flanges 17, 19 on the pack of sheets 14.
- a first end of the screws bears against the outer face of a rear end flange 19, while the other end of the screws projects from the outer face of a front end flange 17 and is threaded so as to receive a nut which, once screwed, exerts pressure against said outer face.
- the packet of sheets 14 is clamped axially between the front end flange 17 and the rear end flange 19.
- These flanges 17, 19 may advantageously make it possible to ensure balancing of the rotor 10 while allowing good maintenance of the rotor. magnets 15 inside the internal cavities 141.
- These flanges can be balanced by adding or removing material. The material removal can be carried out by machining, while the addition of material can be carried out by implanting elements in openings provided for this purpose and distributed along the circumference of the flange 17, 19.
- an electric motor 30 equipped with the rotor 10 of Figure 1.
- This electric motor 30 comprises in particular a two-part housing housing the rotor 10 and an annular stator 36 which surrounds the rotor 10 so coaxial with the shaft 12.
- the housing comprises in particular a front bearing 32 and a rear bearing 34 connected to each other by means of fixing screws 31.
- the bearings 32, 34 are of hollow shape and each centrally carry a ball bearings, 33 and 35 respectively, for mounting the shaft 12 in rotation.
- Chignons 37 project axially on either side of the stator body 36 and are housed in the intermediate space separating the stator 36 from the Respective bearings 32, 34.
- the front and rear bearings 32, 34 will advantageously be made of metal.
- This shaft 12 comprises a main body formed of a front end portion 121 and a rear end portion 123. , said end portions 121, 123 being separated by a central portion 122.
- the main body is provided with a blind hole 128 aligned along the X axis of the shaft 12.
- This blind hole 128 comprises two contiguous sections of diameters different internal ones, namely a first section 128a having an internal diameter DI and a second section 128b having an internal diameter D2.
- the shaft 12 has an internal channel 124, said inlet channel, through which can be conveyed a cooling fluid intended to cool the rotor 10.
- the inlet channel 124 is formed jointly by the first section 128a and by the second section 128b of the blind hole 128. Furthermore, the shaft 12 is provided with several holes 125 oriented radially with respect to the X axis of the shaft 12, said holes 125 being formed inside the portion front end 121 so as to open out, on one side, into the inlet channel 124 and, on the other side, at the level of the peripheral wall of the shaft. Similarly, several holes 127 oriented radially with respect to the X axis of the shaft 12 are formed inside the central portion 122 so as to open out, on one side, into the inlet channel 124 and , on the other side, at the level of the peripheral wall of the shaft.
- FIG. 6 and 7 there is shown the front flange 17 fitted to the rotor 10 of Figure 1.
- the rear flange 19 having a structure substantially identical to the front flange 17, the technical details given below will apply so similar to the rear flange 19.
- the front flange 17 is substantially in the form of a disc comprising in particular an external face (not shown) and an internal face 173.
- the internal face 173 is in contact with the front lateral face 143 of the pack of sheets 14 (the face on the other hand, the internal side 193 of the rear flange 19 is in contact with the rear lateral face 144 of the packet of sheets 14).
- the internal face 173 is provided with a groove 176 extending radially from a recessed central zone 172 of said flange to a peripheral face 177 of said flange.
- the groove 176 is configured to form with the corresponding side face 143 of the sheet metal pack 14 a circulation channel for the cooling fluid, called the front outlet channel 175.
- a similar groove allows the same. how to define a rear output channel 195.
- the central area 172 of the flange has a profile complementary to the shaft 12 such that the shaft 12 is housed without play in said central area 172.
- the groove 176 extends from a proximal end. 176i of annular shape, on which the radial holes 125 of the shaft 12 open, up to several distal ends 176j, forming openings 178 through the peripheral face 177 of the flange 17. In the mounted position of the electric motor 30 shown in FIG. FIG. 2, these distal ends 176j face the buns 37.
- the groove 176 is moreover formed of a succession of radial segments 176a and of contiguous orthoradial segments 176b.
- These segments 176a, 176b advantageously define a baffle profile which makes it possible to increase the path to be traveled by the cooling fluid during its circulation in the front outlet channel 175 relative to a path which would be radially direct between the central zone 172 and the peripheral face 177 of said flange. As illustrated in FIG. 6, this profile also makes it possible to optimize the contact surfaces between the front outlet channel 175 and the permanent magnets 15 housed in the pack of sheets 14.
- the rotor 10 and the motor 30 can be cooled by a cooling fluid, such as oil for example, said cooling fluid circulating in the rotor successively through the inlet channel 124, then between the front flanges. and rear 17, 19 and the front and rear side faces 143, 144 of the sheet metal bundle 14 respectively through the front and rear outlet channels 175, 195, to finally be expelled out of the rotor 10 through the openings 178.
- a cooling fluid such as oil for example
- FIG. 8 is a rear axial view of a rotor 10 according to a second embodiment of the invention.
- This second embodiment differs mainly from the first embodiment described above by the profile of the groove 176 formed in each of the front and rear flanges 17 and 19, as well as by the nature and the arrangement of the permanent magnets 15 in the pack of sheets 14.
- the permanent magnets 15 have a parallelepipedal shape with a rectangular section and are substantially aligned in two planes perpendicular to the X axis of the shaft 12, each of said planes being aligned with one of the front and rear side faces 143, 144 of the sheet metal bundle 14.
- the magnets 15 are distributed uniformly around the X axis and are arranged to form a star pattern with several branches.
- the magnets 15 could be made of rare earth, for example.
- the package of sheets 14 may in particular include a plurality of second internal cavities 142 axially traversing and extending along a radial direction with respect to the X axis. These second internal cavities 142 will be able to accommodate acoustic absorption elements inside the package of sheets. In the embodiment shown, these second internal cavities 142 are four in number and each have a section in the form of a ring portion. They are distributed uniformly around the X axis so as to avoid creating an unbalance in the rotor.
- FIG. 9 there is shown the front flange 17 fitted to the rotor 10 of Figure 8.
- the rear flange 19 having a structure substantially identical to the front flange 17, the technical details given below will apply in a similar manner. to the rear flange 19.
- the internal face 173 of the front flange 17 is provided with a groove 176 which extends from a proximal end 176i, on which the radial holes 125 of the shaft 12 open, up to several ends.
- distal 176j forming the openings 178 through the peripheral face 177 of the flange 17 through which the cooling fluid can be expelled.
- these distal ends 176j face the buns 37.
- the groove 176 is formed of a succession of radial segments 176a and of contiguous orthoradial segments 176b.
- These segments 176a, 176b advantageously define a baffle profile which makes it possible to lengthen the path to be traveled by the cooling fluid during its circulation in the front outlet channel 175 relative to a path which would be radially direct between the central zone 172 and the peripheral face 177 of said flange. As illustrated in FIG. 8, this profile also makes it possible to circulate more cooling fluid in the zones of the front flange 17 which directly face the permanent magnets 15 housed in the pack of sheets 14.
- the flanges 17, 19 may also be provided with several grooves 176 separated from each other so that the cooling fluid cannot circulate between the grooves through the flanges.
- Each of the grooves 176 may advantageously extend radially from the recessed central zone of the flanges, at the level of which each of the grooves will be in fluid communication with the inlet channel 124, up to the peripheral face of said flanges at the level of a single exit opening.
- This outlet opening will advantageously be axially aligned with the chignons 37 of the stator 36 so as to allow cooling of said chignons 37 by means of the cooling fluid expelled from the rotor through said outlet opening.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2005689A FR3111029B1 (fr) | 2020-05-29 | 2020-05-29 | Rotor pour moteur électrique muni d’un circuit de refroidissement |
| PCT/FR2021/050922 WO2021240101A1 (fr) | 2020-05-29 | 2021-05-20 | Rotor pour moteur électrique muni d'un circuit de refroidissement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4158754A1 true EP4158754A1 (fr) | 2023-04-05 |
Family
ID=72356133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21733499.4A Pending EP4158754A1 (fr) | 2020-05-29 | 2021-05-20 | Rotor pour moteur électrique muni d'un circuit de refroidissement |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12362615B2 (fr) |
| EP (1) | EP4158754A1 (fr) |
| CN (1) | CN115668695A (fr) |
| FR (1) | FR3111029B1 (fr) |
| WO (1) | WO2021240101A1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759706B (zh) * | 2022-03-17 | 2023-02-10 | 华为电动技术有限公司 | 一种转子、电机和电动车 |
| DE102022122183A1 (de) * | 2022-09-01 | 2024-03-07 | Bayerische Motoren Werke Aktiengesellschaft | Elektrische Maschine |
| WO2024146697A1 (fr) * | 2023-01-06 | 2024-07-11 | Gkn Automotive Limited | Machine électrique |
| DE112023005702T5 (de) * | 2023-01-30 | 2025-11-13 | Gkn Automotive Limited | Elektrische Maschine mit Ölkühlung |
| EP4597798A1 (fr) * | 2024-02-02 | 2025-08-06 | Polestar Performance AB | Agencement de support |
| DE102024123063A1 (de) * | 2024-08-13 | 2026-02-19 | Bayerische Motoren Werke Aktiengesellschaft | Stirnseitiges Abdeckelement für einen Rotor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4483948B2 (ja) * | 2008-01-17 | 2010-06-16 | トヨタ自動車株式会社 | 回転電機 |
| JP5392101B2 (ja) * | 2010-01-08 | 2014-01-22 | トヨタ自動車株式会社 | 電動機の冷却構造 |
| JP5772544B2 (ja) * | 2011-11-25 | 2015-09-02 | トヨタ自動車株式会社 | 回転電機の冷却構造 |
| FR3064839A1 (fr) * | 2017-03-28 | 2018-10-05 | Valeo Equipements Electriques Moteur | Machine electrique tournante a refroidissement optimise |
| JP6815510B2 (ja) | 2017-07-05 | 2021-01-20 | 三菱電機株式会社 | 回転電機 |
-
2020
- 2020-05-29 FR FR2005689A patent/FR3111029B1/fr active Active
-
2021
- 2021-05-20 WO PCT/FR2021/050922 patent/WO2021240101A1/fr not_active Ceased
- 2021-05-20 US US17/928,469 patent/US12362615B2/en active Active
- 2021-05-20 EP EP21733499.4A patent/EP4158754A1/fr active Pending
- 2021-05-20 CN CN202180039155.4A patent/CN115668695A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021240101A1 (fr) | 2021-12-02 |
| US20230223807A1 (en) | 2023-07-13 |
| US12362615B2 (en) | 2025-07-15 |
| FR3111029A1 (fr) | 2021-12-03 |
| FR3111029B1 (fr) | 2023-06-30 |
| CN115668695A (zh) | 2023-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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