WO2024094545A1 - Procédé d'assemblage des dents d'un stator à un carter - Google Patents
Procédé d'assemblage des dents d'un stator à un carter Download PDFInfo
- Publication number
- WO2024094545A1 WO2024094545A1 PCT/EP2023/080010 EP2023080010W WO2024094545A1 WO 2024094545 A1 WO2024094545 A1 WO 2024094545A1 EP 2023080010 W EP2023080010 W EP 2023080010W WO 2024094545 A1 WO2024094545 A1 WO 2024094545A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- assembly face
- ribs
- electrical machine
- casing
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- 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
- H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/021—Magnetic cores
- H02K15/022—Magnetic cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
Definitions
- the invention relates to an architecture of stator teeth or a casing in a rotating electrical machine with axial flux, in particular of the permanent magnet type, with a view to their assembly.
- rotating electrical machines comprise a stator, secured to a casing, and a rotor, secured to a shaft.
- the rotor may be integral with a driving and/or driven shaft and may belong to a rotating electric machine in the form of an alternator or an electric motor.
- the casing is configured to rotate the rotor shaft, for example via bearings.
- the rotor is provided with poles formed for example by permanent magnets while the stator comprises phase windings, typically constituted by coils closed on themselves which are wound around teeth.
- stator and rotor are arranged so that the electromagnetic flux circulates parallel to the rotor shaft.
- Most axial flux electrical machines include several stators and/or rotors each having a disc shape, these elements being separated, in the axial direction of the rotor shaft, by gaps called air gaps.
- two stators are arranged on either side of a rotor in the axial direction of the rotor shaft.
- Each stator can then only consist of the teeth and their windings, which are fixed to the casing.
- the invention relates more particularly to this type of configuration.
- the assembly of the stator teeth on the casing greatly influences the efficiency of the electric machine.
- this assembly makes it possible to control the air gap between the stator and the rotor.
- the air gap responds in particular to very precise distance constraints so that the magnetic field formed by the stator can drive the rotor in motor mode.
- the assembly must withstand the stresses suffered by the electrical machine (vibrations, temperature, etc.).
- this assembly also influences the cooling of the member which is done, in certain configurations, by cooling circuits arranged on the external faces of the casings.
- a second solution consists of gluing the teeth of the stator to the casing. But using glue between two flat surfaces can cause several problematic. Indeed, if the quantity of glue is not uniform then the tooth will be poorly positioned on the casing, the air gap would then not be controlled. In addition, air bubbles may be created during assembly which would result in a reduction in the bonding surface and therefore in the strength of the tooth as well as a reduction in the efficiency of the cooling circuit since the heat exchange would be less optimal.
- the present invention proposes an electric machine element which has a flat assembly face intended to be assembled by gluing to a flat assembly face of another element of an electric machine.
- Said element comprises at least two ribs arranged projecting from its flat assembly face and having over their entire length the same height measured perpendicular to said flat assembly face.
- the use of the technique of gluing two elements of an electrical machine has the advantage of fixing them without adding parts.
- the presence of ribs ensures a sufficient glue reserve while minimizing air bubbles to ensure total and optimal bonding of the two elements.
- the ribs being all the same height, they make it possible to maintain an identical spacing between the two assembled elements after gluing.
- the glue reserve is determined by the height of the ribs which, preferably, can be from 0.2 millimeters to 0.8 millimeters.
- the proposed solution is also easy to implement industrially, particularly when the ribs are made by punching.
- the assembly face can be defined by a plurality of edges and the at least two ribs can extend from one edge to another edge of the assembly face.
- An advantage is being able to control the quantity of glue in reserve over a larger surface area since the at least two ribs extend from one edge to another of the assembly face.
- a rib can be arranged along one edge of the assembly face and the at least one other rib can be arranged along an opposite edge of the assembly face. assembly.
- An advantage is also to control a larger surface area for the quantity of glue which is framed by the at least two ribs and to facilitate the production of the element, particularly when it is a stator tooth. .
- the at least two ribs can be parallel to each other.
- the at least two ribs can have a cross section of identical shape over their entire length. length.
- the ribs can have a cross section of identical shape but of variable dimensions along their length. This can make it possible to maintain, for example, facing edges of the ribs parallel to each other.
- the ribs may have a cross section of identical shape and dimensions over their entire length.
- each rib can have at least one of the following characteristics:
- a cross section in the shape of a quadrilateral of which at least two angles, or even all the angles, are rounded allows the glue present between the top of the rib and the assembly face of the other element to be evacuated onto the sides of each rib when the two elements are put under pressure to achieve bonding and thus ensure direct contact without a layer of glue between the top of the rib and the assembly face of the other electrical machine element .
- This evacuation can be favored by a cross section of trapezoidal shape, the large base of which is integral with the assembly face and of which at least the angles between the small base and the lateral sides are rounded.
- the electric machine element can be chosen from a stator tooth and a casing.
- Another object of the invention is a member of a rotating electrical machine, in particular an axial flux electrical machine, comprising a plurality of first elements each defining a stator tooth and a second element defining a casing.
- Each first element having a flat assembly face assembled by a layer of glue to a flat assembly face of the second element, and each of the first elements or the second element is an element as described previously.
- At least two ribs then extend between the assembly face of each first element and the assembly face of the second element, and the glue layer extends from an assembly face of each first element to the face assembly of the second element, each rib of the assembly face of an element being in direct contact with the face assembly of the facing element.
- each first element defining a stator tooth can be formed from a stack of sheets following a stacking direction, each sheet extending perpendicular to the assembly face of the casing.
- the at least two ribs can then advantageously extend parallel to a direction of stacking of the sheets.
- the invention also relates to a rotating electrical machine, in particular with axial flux, comprising a rotor comprising a rotor disk and a shaft, and two members as described above, in which the rotor disk is integral in rotation with the The shaft and the two members are mounted on either side of the rotor disk, the assembly face of the casing of each member being directed towards the rotor disc and the casing of each member being mounted on the shaft via bearings, the two housings being assembled to one another.
- the invention may in particular relate to a motor vehicle equipped with the rotating electric machine described above.
- FIG. 1 is a sectional view of a rotating axial flux electrical machine.
- FIG. 2 is a perspective view of a stator tooth according to an implementation of the invention.
- FIG. 3 is a perspective view of a stator tooth according to another implementation of the invention.
- FIG. 4 is a sectional view of a member of a rotating electrical machine according to one mode of implementation of the invention.
- FIG. 5 is a sectional view of a rib of a member of a rotating electric machine according to one mode of implementation of the invention.
- FIG. 6 is a sectional view of a rib of a member of a rotating electric machine according to another mode of implementation of the invention.
- the invention relates to an electrical machine 1 rotating with axial flux in a motor vehicle.
- the rotating electrical machine 1 with axial flux comprises a rotor comprising a rotor disk 2 integral in rotation with an output shaft 3.
- the axis of rotation of this shaft 3 extends perpendicular to the rotor disk 2 and passes through the center of the latter.
- the electric machine 1 also comprises a member 4 comprising a plurality of first elements each defining a stator tooth 5 assembled to a second element defining a casing 6. This member 4 is separated from the disc of rotor 2 by a predetermined fixed distance called air gap 7.
- the two bodies 4 are similar and have the same elements.
- the elements of only one of the organs have been designated by references and in the remainder of the description, only one of the organs 4 is described in detail, the structure of the other organ 4 being identical or similar.
- the metal casing 6 of the member 4 has an internal face 8 and an external face 9 opposite the internal face 8. These faces 8, 9 are the faces of a wall 14 of the casing.
- the casing can be made of any metal or alloy usually used to manufacture casings, such as aluminum.
- the housing 6 is also mounted on the shaft 3 via bearings 10.
- the casing 6 has the shape of a half-shell thus covering the stator 5 and, in part, the rotor disk 2. It thus has a substantially flat wall 14 defining the internal 8 and external 9 faces and which is extends parallel to the rotor disk 2, this wall 14 being provided with an external side wall 15 forming a face dedicated to coupling with the other casing and with an internal side wall 16 comprising a bearing housing.
- the two cards of the organs 4, located on either side of the rotor disk 2 are thus assembled to one another by their external side walls 15.
- the internal face 8, also called the flat assembly face 8, is thus defined (delimited) by a plurality of edges. This flat assembly face 8 of each casing is thus facing one face of the rotor disk 2.
- the bearings 10 are received in the bearing housings of the internal side walls 16 of the members 4 and the corresponding housings of the shaft 3.
- the teeth 5 of the stator are here arranged so as to form a disc, or more precisely a ring, the center of which defines a cylindrical passage for the shaft 3. They are therefore placed radially with respect to this cylindrical passage, equidistant from the latter.
- the teeth 5 are typically manufactured from a stack of metal sheets 12, each sheet extending perpendicular to the internal face 8 of the casing 6 after assembly.
- the metal sheets 12 can be formed from any metal or alloy usually used for stators, such as for example an alloy composed of iron and silicon.
- the teeth 5 of the stator are surrounded by metal wires 13 thus forming the coil.
- the metal wires 13 can be manufactured with metals or alloys suitable for forming a coil, such as copper for example.
- the teeth 5 of the stator also comprise a flat assembly face 11 defined (delimited) by a plurality of edges and intended to be secured by bonding to the internal face 8 of the casing 6, which is also a flat face of assembly 8.
- the flat assembly face 11 has the shape of a quadrilateral, here a trapezoid and is thus delimited by four edges l ia, 11b, 11c, 1 Id.
- the invention is not however not limited to a flat face shape assembly. The latter depends in particular on the type of tooth used.
- the teeth 5 of a member 4 are assembled to the associated casing 6 by glue.
- the glue used is typically an epoxy or two-component glue.
- At least two ribs 17 are arranged projecting from one of the flat assembly faces 8, 11. These ribs 17 thus make it possible to separate the flat assembly faces, forming a space free which can be filled with glue.
- the number of ribs is two but a higher number can be considered depending on the architecture of the element to be glued.
- These ribs 17 extend from the assembly face of the element of which they are integral with the assembly face of the other element. Thus, when elements 5 and 6 of member 4 are assembled, the tops of the ribs are in contact with an assembly face.
- the ribs 17 have the same height over their entire length measured perpendicular to the assembly face to which they are integral. They are thus arranged in such a way as to create one or more free spaces each forming a reserve 18 of glue of the same height as them. These reserves are formed between the ribs and/or between the ribs and the edges of the assembly face.
- the height of the ribs 17 can thus be chosen according to the quantity of glue to be applied for optimum assembly, it is typically chosen between 0.2 mm and 0.8 mm and preferably between 0.4 and 0.6 mm (terminals included), for example 0.5 mm.
- the glue reserves 18 make it possible to ensure total bonding of the tooth to the casing as well as to reduce the risk of creating air bubbles because the space formed between the two assembly faces makes it possible to eliminate the bubbles. air when applying the glue.
- the quantity of air bubbles likely to form is reduced, the heat exchange between the stator teeth 5 and the casing 6 is optimized.
- the ribs 17 can be arranged either on each assembly face 11 of the plurality of first elements each defining a tooth 5, or on the assembly face 8 of the casing 6.
- the ribs 17 are arranged on each teeth 5 of the stator as shown in Figures 2 to 4.
- the ribs 17 are typically made of the same material as that used to form the assembly face of the teeth or the assembly face of the casing. Thus, they can for example be made of metal sheet. When made on a tooth, ribs can be made by punching.
- Figure 2 represents a stator tooth 5 whose assembly face 11 has two projecting ribs 17, the tooth 5 being intended to be assembled to the assembly face 8 of the casing 6, as shown in Figure 4
- the ribs are parallel and extend from one edge 11c of the assembly face 11 to the opposite edge l ia, at a distance from the other edges, which makes it possible to.
- These ribs 17 are identical and here have a section of identical shape and dimensions over their entire length.
- the configuration of the ribs is not limited to this example.
- the ribs 17 can extend from one edge of one of the assembly faces 8, 11 to another edge of one of these assembly faces 8, 11.
- the ribs 17 do not necessarily extend between two opposite edges and can therefore connect two other edges, in particular contiguous edges.
- the two ribs 17 are arranged along two opposite edges 11b, l ld of the assembly face.
- the arrangement of the ribs 17 is not limited to this example. Only one of the ribs can be placed along an edge for example.
- the ribs 17 have a cross section of identical shape over their entire length but whose dimensions gradually increase from one edge 1 le of the assembly face to the other edge l ia.
- the ribs 17 are here identical but arranged symmetrically on either side of the tooth.
- a single glue reserve 18 is thus formed between the ribs, this glue reserve being here of rectangular shape.
- the invention is of course not limited to a specific shape of the glue reserve, the important thing being that the height of the glue reserve is constant.
- the ribs 17 extend preferably parallel to the direction of stacking of the sheets as shown in Figures 2 and 3.
- the cross section of the ribs 17 can be of rectangular shape, one side 19 of which is integral with the assembly face 11.
- the ribs 17 also have rounded angles between the side opposite 20 to the side 19 and the lateral sides 21.
- the cross section of the ribs 17 is not limited to this shape. More generally, the cross section can be in the shape of a quadrilateral, a first side 19 of which is integral with the assembly face 11 and the angles between a second side 20 opposite the first side 19 and the lateral sides 21 are rounded.
- the cross section of the ribs 17 can be of trapezoidal shape of which a first side 19, forming the large base, is integral with the assembly face 11.
- the ribs 17 also have rounded angles between a second side 20, forming the small base, opposite the large base 19 and the lateral sides 21.
- the teeth can be assembled to the casing by depositing the glue on the assembly face which does not have the ribs. Then by joining the two assembly faces 8 and 11 together. During this step, we can press for a long time on the element with the ribs until the glue is distributed in the reserves 18 and it takes effect. By pressing on the element having the ribs the glue present at the level of the second side 20 of the rib, the glue will be expelled from this part towards the lateral edges of the ribs. In particular, rounded corners help promote the expulsion of the glue, which will flow more efficiently and more quickly than if the angles are straight, which also promotes the evacuation of any air bubbles that may be present.
- the ribs are integral with the assembly face of the stator teeth.
- these ribs could be made projecting from the assembly face 8 of the casing, for example by a foundry process or by machining.
- the ribs are arranged on the assembly face 8 of the casing, it is not necessary that they extend over the entire length of the casing. They can nevertheless advantageously extend from one edge to another of the assembly face 11 of the facing tooth 5.
- the invention has been described with reference to a rotating electric machine with axial flux having a rotor and two stators. It can nevertheless be applied to the assembly of stator teeth to a casing or to another tooth support element of a rotating electrical machine with axial flux of different structure or even of a rotating electrical machine with radial flux.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380081828.1A CN120283345A (zh) | 2022-11-03 | 2023-10-26 | 用于将定子的齿附连至壳体的方法 |
| KR1020257018217A KR20250103721A (ko) | 2022-11-03 | 2023-10-26 | 고정자의 톱니를 케이싱에 부착하는 방법 |
| EP23793902.0A EP4612777A1 (fr) | 2022-11-03 | 2023-10-26 | Procédé d'assemblage des dents d'un stator à un carter |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2211424 | 2022-11-03 | ||
| FR2211424A FR3141822B1 (fr) | 2022-11-03 | 2022-11-03 | Procédé d’assemblage des dents d’un stator à un carter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024094545A1 true WO2024094545A1 (fr) | 2024-05-10 |
Family
ID=84569519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/080010 Ceased WO2024094545A1 (fr) | 2022-11-03 | 2023-10-26 | Procédé d'assemblage des dents d'un stator à un carter |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4612777A1 (fr) |
| KR (1) | KR20250103721A (fr) |
| CN (1) | CN120283345A (fr) |
| FR (1) | FR3141822B1 (fr) |
| WO (1) | WO2024094545A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2606561B1 (fr) * | 2010-08-19 | 2014-10-15 | Yasa Motors Limited | Machine électrique - construction avec surmoulage |
| US10069385B2 (en) * | 2013-09-13 | 2018-09-04 | Yasa Limited | Pole-piece bonding |
| IT201800003952A1 (it) * | 2018-03-27 | 2019-09-27 | Mario Burigo | Configurazione innovativa per macchine elettriche a flusso assiale con statore senza giogo |
| US20210091647A1 (en) * | 2019-09-20 | 2021-03-25 | Seiko Epson Corporation | Axial gap motor |
-
2022
- 2022-11-03 FR FR2211424A patent/FR3141822B1/fr active Active
-
2023
- 2023-10-26 EP EP23793902.0A patent/EP4612777A1/fr active Pending
- 2023-10-26 WO PCT/EP2023/080010 patent/WO2024094545A1/fr not_active Ceased
- 2023-10-26 KR KR1020257018217A patent/KR20250103721A/ko active Pending
- 2023-10-26 CN CN202380081828.1A patent/CN120283345A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2606561B1 (fr) * | 2010-08-19 | 2014-10-15 | Yasa Motors Limited | Machine électrique - construction avec surmoulage |
| US10069385B2 (en) * | 2013-09-13 | 2018-09-04 | Yasa Limited | Pole-piece bonding |
| IT201800003952A1 (it) * | 2018-03-27 | 2019-09-27 | Mario Burigo | Configurazione innovativa per macchine elettriche a flusso assiale con statore senza giogo |
| US20210091647A1 (en) * | 2019-09-20 | 2021-03-25 | Seiko Epson Corporation | Axial gap motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120283345A (zh) | 2025-07-08 |
| FR3141822B1 (fr) | 2025-02-28 |
| KR20250103721A (ko) | 2025-07-07 |
| FR3141822A1 (fr) | 2024-05-10 |
| EP4612777A1 (fr) | 2025-09-10 |
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