WO2022128449A1 - Corps de stator pour machine electrique a flux axial et procede de fabrication d'un tel corps de stator - Google Patents
Corps de stator pour machine electrique a flux axial et procede de fabrication d'un tel corps de stator Download PDFInfo
- Publication number
- WO2022128449A1 WO2022128449A1 PCT/EP2021/083578 EP2021083578W WO2022128449A1 WO 2022128449 A1 WO2022128449 A1 WO 2022128449A1 EP 2021083578 W EP2021083578 W EP 2021083578W WO 2022128449 A1 WO2022128449 A1 WO 2022128449A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- base
- layers
- angular portion
- stator body
- longitudinal axis
- Prior art date
Links
- 230000004907 flux Effects 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 8
- 239000002184 metal Substances 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 35
- 238000004804 winding Methods 0.000 claims description 28
- 238000005452 bending Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010409 thin film 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
- H02K1/12—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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
- H02K15/026—Wound 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—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
Definitions
- the present invention generally relates to electrical machines with axial flux.
- stator body for an axial flux electrical machine comprising:
- a base comprising layers of sheet metal which are wound around a longitudinal axis, the base having an end face substantially orthogonal to the longitudinal axis, and
- the invention finds a particularly advantageous application in electric motors for electric or hybrid motor vehicles.
- a conventional stator of an axial flux electric machine comprises a body with a generally annular base and teeth distributed circumferentially on one of the end faces of the base.
- a stator also includes coils of conductive wire arranged around the teeth. Under the effect of electric currents, the coils generate magnetic fields allowing the stator to set the rotor in motion.
- the body of the stator is made by winding a metal sheet around a longitudinal axis.
- This metal sheet winding makes it possible to limit the eddy currents flowing through the stator when the latter is in operation and, consequently, to reduce the energy losses by heating.
- the originally planar metal sheet is deformed: it is curved so as to form the annular base of the body of the stator.
- bending a metal sheet that is to say applying a bending stress to it, degrades its magnetic properties, in particular its magnetic conductivity. The more the sheets are bent, the more their magnetic properties are degraded. This degradation of the magnetic properties is even more marked when the sheets have an oriented grain.
- a known technique for partially restoring the magnetic properties of a curved sheet consists of heating the body of the stator to a very high temperature, typically between 700°C and 800°C. Such heating nevertheless has the undesirable effect of deteriorating or thinning the insulating layer present on the surface of the metal sheet. Deterioration, or thinning, of the insulating layer contributes to increased eddy current losses when the stator is in operation. The restoration of the magnetic properties of the stator by this technique is therefore limited.
- heating the body of the stator to high temperature is costly in terms of energy and not very suitable for mass production.
- the present invention proposes a stator body having layers of flat sheet metal.
- the invention proposes a stator body as defined in the introduction, in which it is provided that the base comprises several angular portions distributed around the longitudinal axis, each angular portion comprising at least a flat layer, said flat layer being attached to a layer of an adjacent angular portion by a fold located at the level of the attachment of one of said teeth to the base.
- stator body With the stator body according to the invention, at least a part of the metal sheet layers is planar in the angular portions. This means that no bending stress is imposed on these planar layers with respect to the shape original plane of the sheet.
- the magnetic properties of the flat metal sheets are preserved in the angular portions, that is to say in the regions where the circulation of the flux is maximum and therefore in the regions where the stator is most susceptible to iron loss.
- the magnetic performance of the stator comprising such a body is therefore improved.
- stator body according to the invention makes it possible to limit the degradation by curvature of the magnetic properties of the metal sheets to folds located at the level of the fixing of the teeth on the end face, therefore to parts of the base contributing by construction little to iron losses.
- stator according to the invention does not need to be heated to high temperature in order to present satisfactory magnetic performance.
- stator body according to the invention taken individually or in all technically possible combinations, are as follows:
- each angular portion comprises at least one other layer which is planar and substantially parallel to said planar layer;
- each angular portion comprises at least one other layer which is curved around an axis parallel to the longitudinal axis;
- the base comprises, on its end face, at least one recessed relief, at least one of said teeth has a shape, part of which is complementary to that of the recessed relief and is fitted into the recessed relief;
- each angular portion comprises at least two layers attached by at least two folds to at least two layers of an adjacent angular portion, said at least two folds having increasingly large radii of curvature as they move away from the axis longitudinal;
- each angular portion comprises at least two layers attached by at least two folds to at least two layers of an adjacent angular portion, said at least two folds having substantially constant radii of curvature;
- said flat layer extends in a plane parallel to the longitudinal axis
- each angular portion comprises at least two layers of sheet metal, two adjacent layers being separated by an electrically insulating layer.
- the invention also proposes a method for manufacturing a stator body as described above comprising the following steps: e1) winding the layers around a support; e2) during rolling, bending of the metal sheet so as to form the bends e3) manufacturing of the teeth and fixing of the teeth on the end face.
- FIG. 1 is a schematic perspective view of a stator body according to a first embodiment of the invention
- FIG. 2 is a schematic top view of the base of the stator body of FIG. 1;
- FIG. 3 is a schematic top view of part of the base of a stator body according to a second embodiment of the invention.
- FIG. 4 is a schematic top view of part of the base of a stator body according to a third embodiment of the invention.
- FIG. 5 is a schematic sectional view of an example of fixing a tooth to the base of the stator body of FIG. 1;
- FIG. 6 illustrates a sequence of steps in a method of manufacturing the base of the stator body of Figure 1;
- FIG. 7 schematically illustrates the winding and folding steps of the process of Figure 6.
- stator body 1 comprising a base 2 and teeth 4.
- the base 2 has a generally annular shape around an axis longitudinal A1, with a radial section (in a half-plane starting from the longitudinal axis A1) of rectangular shape.
- the longitudinal axis A1 corresponds to an axis of rotation of a rotor with which the stator is intended to cooperate.
- This base 2 thus has an internal face 30 which delimits a central recess, an external face 31 and two end faces substantially perpendicular to the longitudinal axis A1.
- the teeth 4 are fixed on one of these two end faces 3. They are regularly distributed around the longitudinal axis A1.
- Each tooth generally has the shape of a right prism, of trapezoidal section (in a plane orthogonal to the longitudinal axis A1).
- the side faces opposite the neighboring teeth are here parallel to each other.
- the thickness of the base 2 that is to say its dimension along the longitudinal axis A1, is for example between 5 mm and 30 mm.
- the diameter of the base 2 is preferably between 10 cm and 50 cm.
- the teeth 4 are here attached to the base 2. They are here each made from a stack of flat sections of a metal sheet identical to that used to make the base 2, that is to say here of the same thickness and made of the same material. The layers are superimposed in a radial direction with respect to the longitudinal axis A1. The teeth 4 are fixed to the base 2, for example by gluing, welding, screwing or bolting.
- the base 2 comprises layers 10 of a magnetically conductive metal sheet.
- the metal sheet is for example made of steel.
- the thickness of the metal sheet is for example between 0.2 mm and 0.5 mm.
- a sheet is spirally wound around the longitudinal axis A1 so as to form all the layers 10 of the base 2.
- the layers could be formed by a concentric assembly of a plurality of metal sheets.
- the sheet metal winding forming the base 2 does not have a radius of curvature which varies linearly.
- the winding is formed of a plurality of flat parts separated two by two by fold lines. At each layer, the fold lines are located at the level of the fold lines of the previous layer.
- the base 2 thus comprises a plurality of angular portions 11 separated from each other by these stacks of fold lines.
- the base 2 is more specifically formed of eighteen angular portions 11, therefore extending over eighteen angular sectors around the longitudinal axis A1, each angular sector having an opening angle of 20 degrees.
- An angular portion 11 is here defined as a section of the base 2 extending over the entire thickness of the base 2, that is to say along the longitudinal axis A1, and from the internal face 30 to the face external 31 of the base 2.
- Each angular portion 11 therefore comprises a plurality of layers 10 of sheet metal.
- three layers 10 belonging to the same angular portion 11 are referenced.
- An angular portion 11 comprises for example between 80 and 400 layers 10.
- the layers 10 are stacked in a substantially radial direction A2, that is to say here perpendicular to the longitudinal axis A1.
- an electrically insulating material is placed between the various neighboring layers.
- Neighboring layers 10 are here successive layers 10 in the stack forming an angular portion 11.
- the electrically insulating material consists for example of a thin film deposited on the metal sheet before winding.
- the film is for example an inorganic film 2 ⁇ m to 5 ⁇ m thick which vitrifies when the stator is heated to very high temperature. It reduces eddy currents in the stator during operation.
- each layer 10 of each angular portion 11 is connected by a fold line 20 to a layer 10 of an adjacent angular portion 11.
- Two adjacent angular portions 11 are here two angular portions 11 located side by side. With the exception of the two layers 10 located at the two ends of the winding, each layer 10 of each angular portion 11 is connected by two fold lines 20 to two layers 10 each located in one of the two adjacent angular portions 11.
- a fold line 20 is here a section of sheet metal which extends parallel to the longitudinal axis A1 and which is curved around an axis parallel to this axis A1, that is to say which has a non-zero curvature in a plane orthogonal to the longitudinal axis A1.
- each fold 20 thus has substantially the shape of an arc of a circle around an axis parallel to the longitudinal axis A1 and located between the longitudinal axis A1 and the fold 20.
- the set of fold lines 20 located between two adjacent angular portions 11 forms a fold zone 21 which extends along a radial plane.
- three fold lines 20 belonging to the same fold zone 21 are referenced.
- the fold lines 20 are specifically located at the level of the attachments of the teeth 4 on the end face 3 of the base 2.
- the fold lines 20 between the two angular portions 11 face the same tooth 4, or are even in contact with the latter.
- the base 41 of the tooth 4 is located opposite the bend zone 21. More precisely, each tooth 4 is centered on a distinct bend zone 21.
- each angular portion is planar. Since the layers 10 extend along the longitudinal axis A1, each flat layer 10 therefore extends in a plane parallel to the longitudinal axis A1.
- all the layers 10 of each angular portion 11 are flat. Moreover, as shown in Figure 2, all the layers 10 of each angular portion 11 are substantially parallel to each other. Substantially parallel means here that the planes in which two neighboring layers extend are either strictly parallel or very slightly inclined with respect to each other by an angle less than 1 degree.
- a flat layer 10 is from the longitudinal axis A1, the greater its length.
- the length of a flat layer 10 is defined between the two fold lines 20 to which it is attached, that is to say here defined as its dimension in a substantially orthoradial direction.
- all the fold lines 20 of a fold zone 21 have a substantially constant curvature. This means that in a plane perpendicular to the longitudinal axis A1 and passing through the base 2, the fold lines 20 of the same fold zone 21 have a substantially identical profile.
- Each fold zone 21 has, in an orthoradial direction specific to it, a constant width.
- the width here is the dimension of the fold zone 21 in the associated orthoradial direction.
- the base 2 here generally has the shape of an octadecagon whose vertices are rounded.
- the base 2 generally has the shape of a polygon with a number of sides equal to the number of angular portions 11 .
- Two flat layers 10 interconnected by the same fold line 20 extend in two planes inclined relative to each other.
- each angular portion 11 comprises plane layers 10 and curved layers 15.
- the curved layers 15 are here curved inwards around an axis parallel to the axis longitudinal A1.
- each curved layer 15 thus has substantially the shape of an arc of a circle around an axis parallel to the longitudinal axis A1 and located between the longitudinal axis A1 and the curved layer.
- the curved layers 15 have a strictly positive curvature over the entire angular portion 11 .
- each angular portion 11 comprises an inner half 12, close to the longitudinal axis A1, which comprises flat layers 10 and an outer half 13, distant from the longitudinal axis A1, which includes 15 curved layers.
- the inner half 12 is in the form, for example, of a base 2 according to the first embodiment.
- the outer half 13 is for example in the form of a conventional cylindrical base according to the current state of the art.
- the curved layers 15 simplify the manufacture of the base 2, the outer half 13 being able to be manufactured in a conventional manner, without bending. Moreover, the curved layers 15 being located on the periphery of the base, the bending stress on the metal sheet is moderate and the loss in terms of magnetic performance is acceptable.
- the inner half 12 and the outer half 13 define between them a channel 5.
- the channel 5 runs through the entire circumference of the globally annular base 2.
- the channel 5 is a free space which can for example be used to circulate a coolant.
- the channel 5 can also be used to insert fixing means, for example to fix the teeth 4 to the base 2 or to fix the stator body 1 to a protective casing.
- the lines of fold 20 are less and less curved away from the longitudinal axis A1. This means that the radius of curvature of the fold lines 20, in a plane perpendicular to the longitudinal axis A1 and passing through the base 2, increases with the distance from the longitudinal axis A1.
- each angular portion 11 all the layers 10 are flat.
- Each fold zone 21 has, in its own orthoradial direction, a width which increases with the distance from the longitudinal axis A1.
- the length of the flat layers 10 of the same angular portion 11 is here substantially constant.
- this third embodiment reduces the number of folding steps and therefore simplifies the manufacture of the base 2.
- the fold areas 20 are certainly wider but located mainly at the level of the periphery of the base 2, where the bending stress on the metal sheet is moderate and the loss in terms of magnetic performance is acceptable.
- the base comprises an inner half close to the longitudinal axis and an outer half remote from the longitudinal axis.
- the folds are less and less curved.
- the bend curve decreases from an identical predetermined curvature for both halves.
- the two halves here also make it possible to delimit a channel.
- recessed reliefs 6 are provided on the end face 3 of the base 2. Each recessed relief 6 forms a recess in the base 2 with respect to the end face 3. In other words, a recessed relief 6 defines a local decrease in the thickness of the base 2.
- all the recessed reliefs 6 are identical.
- the shape of the recessed reliefs could vary from one relief to another.
- the recessed reliefs 6 may have a surface with edges, as in the example of FIG. 5, or even a smooth surface.
- the recessed reliefs 6 are here located at the level of the fixing of the teeth 4 on the base 2.
- the stator body 1 here has a recessed relief 6 per tooth 4.
- Each recessed relief is associated with a tooth 4
- each tooth 4 has a base 41 of complementary shape designed to engage, partially or until it comes into contact with the base 2, in its associated recessed relief 6.
- the hollow relief here has a flat bottom which extends orthogonally to the longitudinal axis A1, from the internal face 30 to the external face 31 of the body 2, and which is flanked by two edges inclined at 45 degrees.
- the tooth 4 is positioned at a distance from the base 2.
- the free space between the base 41 of the tooth and the base 2 is here filled with an adhesive material 7, by example a thermosetting inorganic adhesive or an epoxy-type adhesive.
- each recessed relief 6 covers the fold area 21 in full. This means that the recessed relief 6 is wider than the fold zone 21 . Alternatively, the recessed relief could be located entirely within the fold area.
- the recessed reliefs 6 make it possible to improve the attachment of the teeth 4 to the base 2, for example by increasing the bonding surface.
- the recessed reliefs 6 also make it possible to improve the circulation of the magnetic flux at the level of the teeth on the one hand because they reduce the volume of the fold zone 21 .
- the metal sheet here has anisotropic crystalline microstructures.
- the sheet is then said to be “grain oriented”.
- These microstructures which can for example be grooves obtained by specific rolling, make it possible to reduce the resistance to magnetic flux of the sheet in a given direction.
- each flat layer 10 has a grain oriented substantially parallel to the end face 3 and to the plane in which this flat layer 10 extends.
- the grain is here oriented parallel to the end face 3 and tangentially to the layer 10 or to the fold line 20. This means that the grain of the layers 10 is therefore oriented in a substantially orthoradial direction.
- the magnetic conductivity is greatly improved in the direction of the grains. Consequently the base 2 here has a high magnetic conductivity tangentially to the winding of the sheet, that is to say in substantially orthoradial directions.
- the teeth 4 also include a stack of grain-oriented sheet metal.
- the method comprises three main steps:
- step e3 of manufacturing and fixing the teeth at the bends.
- the support (not shown) is a polygon, extending along an axis of rotation corresponding to the longitudinal axis A1, having as many sides as the number of angular portions 11 of the base 2.
- the sheet originally substantially flat (in practice either perfectly flat or slightly curved because it is wound around large coils with very large radii of curvature), is rolled around the rotating support.
- step e2) during winding, the sheet is bent at determined positions. These determined positions are calculated before winding so as to arrange the fold lines 20 formed in contact with each other, for example so that the fold lines 20 of the same fold zone 21 are radially aligned. The bending is thus carried out at intervals of length of sheet which lengthen progressively during the winding.
- Step e2) is here performed during winding, that is to say during step e1).
- Step 2) begins here at approximately the same time as the winding.
- the determined positions also make it possible to stamp and cut or machine the sheet before rolling it up to form the recessed reliefs 6.
- Notches can for example be made on a lateral side of the sheet. These notches can more specifically be made on the side of the sheet which generates the end face 3 during winding. Thus, during winding, the notches are arranged in contact with each other so as to form the recessed reliefs 6. Alternatively, the recessed reliefs could be machined on the end face after rolling the sheet.
- the folding is done over the entire width of the sheet along the longitudinal axis A1.
- the bending is done here by taking the sheet in vices for example by means of a set 8 comprising a die and a punch.
- This matrix can also be used to form the recessed reliefs 6, for example by stamping the sheet when the latter is bent.
- the sheet is bent throughout the winding.
- the sheet is here bent with a substantially constant bend angle P.
- the bend angle is here defined as the angle given to the bend which faces the longitudinal axis A1 .
- the bend angle here is equal to 360 degrees divided by the number of teeth 4.
- a base 2 it is possible to manufacture, initially, the inner half 12 of the base 2 and, secondly, the outer half 13 of the base 2.
- the sheet is bent throughout the winding.
- another sheet can conventionally be wound on a cylindrical support without making any folds during the winding.
- the inner half 12 is nested in the outer half 13.
- the outer half 13 can also be manufactured by stopping the folding during the winding of the sheet.
- two bases 2 according to the third embodiment can be manufactured and then nested one inside the other.
- the teeth 4 are made by stacking sections of a flat sheet and are then attached to the base 2.
- the teeth 4 are specifically fixed at the level of the fold lines 20.
- the teeth could be made in one piece with the base, for example by cutting notches on the metal sheets before rolling it up.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21823832.7A EP4264807A1 (fr) | 2020-12-18 | 2021-11-30 | Corps de stator pour machine electrique a flux axial et procede de fabrication d'un tel corps de stator |
US18/258,166 US20240055912A1 (en) | 2020-12-18 | 2021-11-30 | Stator body for an axial flux electric machine and method for manufacturing such a stator body |
CN202180089404.0A CN116802968A (zh) | 2020-12-18 | 2021-11-30 | 用于轴向通量电机的定子本体以及用于制造这种定子本体的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2013596A FR3118348B1 (fr) | 2020-12-18 | 2020-12-18 | Corps de stator pour machine électrique à flux axial et procédé de fabrication d’un tel corps de stator |
FRFR2013596 | 2020-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022128449A1 true WO2022128449A1 (fr) | 2022-06-23 |
Family
ID=74669076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/083578 WO2022128449A1 (fr) | 2020-12-18 | 2021-11-30 | Corps de stator pour machine electrique a flux axial et procede de fabrication d'un tel corps de stator |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240055912A1 (fr) |
EP (1) | EP4264807A1 (fr) |
CN (1) | CN116802968A (fr) |
FR (1) | FR3118348B1 (fr) |
WO (1) | WO2022128449A1 (fr) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2382123A1 (fr) * | 1977-02-24 | 1978-09-22 | Novikov German | Procede de fabrication d'un circuit magnetique enroule pour machine electrique |
WO1992019035A1 (fr) * | 1991-04-12 | 1992-10-29 | Hisey Bradner L | Machines dynamo-electriques comprenant des structures de stator efficaces au niveau energetique et procede de fabrication |
CN108900057A (zh) * | 2018-08-31 | 2018-11-27 | 沈阳工业大学 | 一种定子齿外侧连线正多边形的轴向磁通永磁电机 |
US20200021174A1 (en) * | 2018-07-10 | 2020-01-16 | Nawootec Co., Ltd. | Axial motor for traction machine and apparatus for fabricating stator core thereof |
-
2020
- 2020-12-18 FR FR2013596A patent/FR3118348B1/fr active Active
-
2021
- 2021-11-30 CN CN202180089404.0A patent/CN116802968A/zh active Pending
- 2021-11-30 WO PCT/EP2021/083578 patent/WO2022128449A1/fr active Application Filing
- 2021-11-30 EP EP21823832.7A patent/EP4264807A1/fr active Pending
- 2021-11-30 US US18/258,166 patent/US20240055912A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2382123A1 (fr) * | 1977-02-24 | 1978-09-22 | Novikov German | Procede de fabrication d'un circuit magnetique enroule pour machine electrique |
WO1992019035A1 (fr) * | 1991-04-12 | 1992-10-29 | Hisey Bradner L | Machines dynamo-electriques comprenant des structures de stator efficaces au niveau energetique et procede de fabrication |
US20200021174A1 (en) * | 2018-07-10 | 2020-01-16 | Nawootec Co., Ltd. | Axial motor for traction machine and apparatus for fabricating stator core thereof |
CN108900057A (zh) * | 2018-08-31 | 2018-11-27 | 沈阳工业大学 | 一种定子齿外侧连线正多边形的轴向磁通永磁电机 |
Also Published As
Publication number | Publication date |
---|---|
CN116802968A (zh) | 2023-09-22 |
US20240055912A1 (en) | 2024-02-15 |
FR3118348A1 (fr) | 2022-06-24 |
EP4264807A1 (fr) | 2023-10-25 |
FR3118348B1 (fr) | 2023-07-28 |
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