EP3403314A1 - Stator for an axial flow machine with a stator ring composed of modules - Google Patents

Stator for an axial flow machine with a stator ring composed of modules

Info

Publication number
EP3403314A1
EP3403314A1 EP17702416.3A EP17702416A EP3403314A1 EP 3403314 A1 EP3403314 A1 EP 3403314A1 EP 17702416 A EP17702416 A EP 17702416A EP 3403314 A1 EP3403314 A1 EP 3403314A1
Authority
EP
European Patent Office
Prior art keywords
stator
portions
ring
unitary
support member
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Withdrawn
Application number
EP17702416.3A
Other languages
German (de)
French (fr)
Inventor
Vasile MIHAILA
Serghei SAVIN
Huguette TIEGNA
Vincent PLOIX
Romain RAVAUD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whylot SAS
Original Assignee
Whylot SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Whylot SAS filed Critical Whylot SAS
Publication of EP3403314A1 publication Critical patent/EP3403314A1/en
Withdrawn legal-status Critical Current

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
    • H02K1/18—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
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components

Definitions

  • the present invention relates to a stator for an axial flow electromagnetic machine with unitary portions forming a stator ring.
  • the invention also relates to an axial flow electromagnetic machine and a method of mounting such a stator.
  • An electromagnetic machine comprises at least one stator and at least one rotor, an air gap separating these two elements.
  • the rotor carries at least one permanent magnet, advantageously a series of permanent magnets, while at least one series of winding elements is carried by the stator.
  • each of the winding elements comprises a core or a tooth bearing a coil, the core being framed on each of its sides by a notch, a wire good conductor of electricity being wound around the core to form the coil .
  • the rotor which is secured to the output shaft of the motor is subjected to a torque resulting from the magnetic field, the magnetic flux created being an axial flow for an axial flow electric machine .
  • the reduction of the mass and the size of the motor for an optimal yield, the reduction of the relaxation torque and the variation of the total torque are criteria as important as the ease of realization, the mass production and the gain in manufacturing time.
  • stator for an electromagnetic machine with axial flow, the stator forming a ring having two substantially circular opposite faces, the stator being composed of several unitary portions. defining the two substantially circular opposite faces, each unit portion having a core around which the winding is wound, the portions units forming at least partially the ring being arranged relative to each other concentrically.
  • the support member has notches each surrounding a portion of the periphery of a unit portion.
  • the notches are separated by a wall. It follows that the unitary portions can not be put side by side and that there is always an interval between them. This does not make it possible to obtain a compact stator.
  • US-A-2010/275260 discloses a stator with coils each forming a unit portion.
  • the unitary portions have on their upper face a securing means with a support member.
  • the windings are fixed on seats that separate them from each other and prevent their approximation. These seats also have the disadvantage of increasing the price of the stator by the presence of auxiliary parts as well as the weight of the stator.
  • the problem underlying the present invention is to design a stator for an axial flow electromagnetic machine that is simple to mount by being easily adaptable while allowing the stator to maintain a compact shape while keeping a small distance between the coils.
  • a stator for an electromagnetic machine with axial flow, the stator forming a ring having two substantially circular faces, the stator being composed of several unitary portions defining the two substantially circular opposite sides, each portion unitary unit having a core around which the coil is wound, the unitary portions forming at least partially the ring being arranged relative to each other concentrically, characterized in that the unitary portions continuously define the two substantially circular opposite faces by being arranged concentrically edge-to-edge to each other and each have securing means, with a support member forming part or not of a housing housing the ring, carried by axial faces and side of each unit portion edge to edge with a unitary portion adjacent, or ground means idarization with said support member carried by at least one upper or lower face of each unit portion forming part of a substantially circular face.
  • the faces are said to be substantially circular because these faces can carry fastening means that can protrude axially while keeping most of the planar and circular face, the securing means occupying
  • the technical effect obtained is a simplicity of assembly.
  • the unit portions can be manufactured long before mounting in the stator at another mounting station and are easily individually mounted in the stator. When a winding is deficient, its associated unit portion can also be removed from the stator easily, especially when each unit portion is releasably secured in the stator. It is no longer necessary to wind the coils on a core already positioned on the stator, which provides more room for winding the winding on a unit portion separate from the others than around a core already positioned on the stator.
  • the technical effect is also a great adaptability of the stator. It is for example possible to change the series of windings of the ring by another series of windings without performing unwinding of the windings but replacing the unitary portions of the stator ring by unitary portions carrying another type of winding. These unit portions may be of different size, only the fastening means remaining the same.
  • the stator according to the present invention may therefore comprise unitary portions made in series independently of the ring and comprising means of joining together to improve the process. industrialization of the stator assembly to reduce the time and cost of production.
  • each unitary portion has a body or tooth formed by an assembly of sheets placed against each other radially to the ring. This characteristic is very advantageous since it makes it possible to easily manufacture each unit portion.
  • the support member is an integral part of the housing or is an integral insert of the housing. Such an assembly is therefore more resistant with elements integral with each other and connected to the housing or in one piece with the housing.
  • a free space forming a notch and, where appropriate, an isthmus formed by the edges located on the side intended to form an air gap on a first circular face of the crown, the edges of each portion.
  • a first form in lateral projection being between the edges of the first and second faces of each lateral side of a unitary portion, the adjacent unitary portions being disposed at edge at least by their first forms in lateral projection.
  • This notch allows to slightly space the windings from each other.
  • the first side-projecting shapes of two unitary portions make contact between these two unitary portions and assist in positioning the unit portions against each other. These first protruding shapes may be part of the lateral securing means unit portions individually relative to the stator housing, as will be further specified.
  • the securing means are removable or permanent, the removable securing means being made by screwing or latching elements between the adjacent unit portions and the permanent joining means being made by welding, gluing or by elements of the type rivet.
  • the removable securing means will be preferred when the unit portions are likely to be frequently dismantled.
  • the removable securing means are made by means of screwing, connecting or detent elements on the edges of the adjacent unitary portions of the second face facing each other and disposed adjacent adjacent unit portions.
  • the unitary portions placed edge to edge realize at least one continuous circular face of the stator ring.
  • the permanent securing means are made by welding, gluing or riveting the edges facing each other and arranged edge to edge by the edges of the adjacent unitary portions of the second face and the support member. This makes it possible to directly secure the unit portions together and avoids using an additional support member, which represents an economy of means and a decrease in the weight of the stator.
  • the support member has radial lights to the ring and positioned extending parallel to the edges of the adjacent unit portions.
  • the support member has complementary forms of bonding associated with forms of adjacent unitary portions forming the fastening means carried by each unit portion.
  • the forms of attachment carried by the support member are insertion cleats, each insertion cleat being of constant or variable prismatic shape along the length of the cleat, a vertex of a triangular section of the prismatic shape pointing to the support member and each of the two other vertices of a triangular section of the prismatic shape being housed in a groove of a second respective axial projecting shape carried by an edge facing each of the two portions adjacent units, the first side-projecting shape and the second axially projecting form flanking the insertion tab.
  • the prismatic shape provides a substantial insertion cleat support surface for two adjacent unitary portions. It can also be considered another form than the prismatic shape such as a half-cylinder shape.
  • the forms of fastening carried by the support member are radial lights to the crown passing through the body of the mortise-forming support, opposite the support member of the adjacent unitary portions having a tenon penetrating a respective mortise in the mounted position of the adjacent unitary portions on the crown, the tenon occupying only a minor portion of an upper or lower face of each unit portion.
  • Minor part means that most of the upper and lower face is free of any tenon. This differentiates a pin according to the present invention from the connection according to a state of the art where it was the entire surface of the upper or lower face which formed tenon.
  • a tenon and mortise connection provides a simple and effective blocking of unit portions with respect to the support member. The occupation of a minor portion of the face by the tenon means that most of the upper or lower face of each unit portion does not enter the interior of the mortise. This allows edge-to-edge in a circular configuration the unit portions.
  • each tenon and the associated mortise are welded together. This reinforces this mode of solidarity.
  • an outer ring surrounds the yoke of the ring over its entire periphery.
  • the cores of the unitary portions are made with laminated sheets, sintered magnetic materials or any other magnetic or non-magnetic material.
  • the unit portions are of variable shapes and dimensions for the same ring.
  • the winding of the winding on each unit portion is made without space limit since the unit portions are not adjacent to each other during this winding which represents an easy assembly impossible to obtain for a crown already mounted in the stator for which the space left between two winding elements is very small.
  • the invention also relates to an electromagnetic machine having at least one stator carrying a series of coils and at least one rotor carrying at least one magnet, characterized in that the at least one stator is a stator as previously described.
  • This machine can take various forms as motor, generator or electromagnetic actuator.
  • FIG. 1 is a schematic representation of a perspective view of a first embodiment according to the present invention of a ring of a stator comprising unitary portions each carrying a winding, a support member provided with means for integral with each unit portion, the coils and winding notches between the unit portions being visible in this figure,
  • FIG. 2 is a schematic representation of a perspective view of the first embodiment according to the present invention shown in FIG. 1, the support member provided with cleats being represented in FIG. 2, certain windings having been removed from FIG. this figure,
  • FIG. 3 is a schematic representation of a perspective view of a second embodiment according to the present invention of a ring of a stator comprising unitary portions, the adjacent unitary portions being joined together in this second embodiment. embodiment, the windings being represented in this FIG. 3,
  • FIG. 4 is a schematic representation of a perspective view of the second embodiment according to the present invention shown in FIG. 3, the windings not being represented and the winding slots between the unitary portions being visible in this figure; 4
  • FIG. 5 is a schematic representation of a perspective view of a third embodiment according to the present invention.
  • a ring of a stator comprising unitary portions, the adjacent unitary portions being joined together in this embodiment by means of a support member having lights in this third embodiment,
  • FIG. 6 is a schematic representation of a perspective view of a fourth embodiment according to the present invention of a ring of a stator comprising unitary portions, the adjacent unitary portions being joined to each other in this embodiment of FIG. realization by means of a support member having securing forms cooperating with complementary shapes provided on each unit portion.
  • the present invention relates to a stator for an axial flow electromagnetic machine.
  • the stator forming a ring 1 having two substantially circular opposite faces 1a, 1b. These opposite substantially circular faces 1a, 1b are connected by a thickness or slice of the ring 1, which can form a cylinder head 15.
  • the circular face 1a of the ring 1 may be the face of the ring opposite the rotor thus forming a part of the air gap of the electric machine comprising the stator.
  • the ring 1 has an internal cavity 2 delimited by an inner periphery while the periphery of the ring may be delimited by the yoke 15 at the outer periphery of the ring 1.
  • the stator comprises windings 3 regularly distributed in the ring 1.
  • each unit portion 4 has a core 5 around which a winding 3 is wound, the unitary portions 4 forming at least partially the ring 1 being arranged, some by compared to others concentrically and put aboard.
  • Edge to edge means that there exists only between the outermost outward edges of two adjacent unitary portions 4, for example the edges referenced 4b or 4a or the first lateral projecting shapes 14 in the figures, that a fair game enough for the assembly of the unitary portions 4.
  • a unit winding portion 4 is shown at a distance from the ring 1 of the stator in FIGS. 1, 2 and 6.
  • the set of winding unit portions 4 at least partially forming the ring 1 of the stator with the unit portions 4 disposed adjacent to each other concentrically at the center of the ring 1.
  • the unit portions 4 have upper and lower faces respectively forming the upper face and the lower face of the ring 1 of the stator.
  • the unitary portions 4 each have securing means 11 with a support member 6 which may or may not be part of a casing housing the ring 1, by at least one upper or lower face of each unit portion 4 forming part of a face substantially.
  • the two types of securing means 11, 12, 12a, 14 described above can thus be used in combination or alternatively.
  • the joining is stronger and the problem of maintaining the unit portions 4 on the stator is solved.
  • the elementary windings 3 carried by the unit portions 4 after assembly by forming the stator ring can be interconnected to form windings.
  • the unitary portions 4 forming the ring 1 of the stator can be made with laminated sheets or based on magnetic or nonmagnetic materials.
  • Each unit portion 4 may thus have a body or tooth formed by an assembly of sheets placed against each other radially to the crown to the crown 1. This can be done by different sheets or by one or more sheets folded or wound up several times on themselves. The sheet portions thus created form concentric circular arcs. This is particularly clearly visible in FIGS. 1 to 4. Another arrangement of the sheets can however be implemented.
  • a housing can accommodate the ring 1.
  • the support member 6, if it is present, may be part of the housing or the support member 6 may be an integral insert of the housing, of the same material or material different from the housing.
  • a first lateral projecting shape 14 may be between the edges 4a, 4b of the first and second faces, this on each lateral side of a unitary portion 4.
  • the adjacent unit portions 4 are then disposed edge to edge at least by their first lateral protruding forms 14 abutting. It is the face 1b of the ring 1 intended to be opposite to the gap which can carry a support member 6.
  • the first lateral projecting shapes 14 of two adjacent unitary portions 4 may define, with the end portions near the edges 4b of the unitary portions, a receiving space for a securing element carried by a support member 6, advantageously a cleat 9.
  • the securing means 11, 12, 12a, 14 may be removable or permanent.
  • the securing means 1 1, 12, 12a, 14 removable can be performed by screwing elements, connecting elements or snap between adjacent unit portions 4.
  • the removable fastening means can be made by screwing elements, connection or snap on the edges 4b vis-à-vis the adjacent unit portions 4.
  • the securing means 1, 12, 12a, 14 permanent can be performed by welding, gluing or by elements rivet type.
  • the securing means 11, 12, 12a, 14 permanent can be performed by welding, gluing or riveting the edges 4b vis-à-vis the adjacent unit portions 4.
  • the welding or gluing can be done by points or by cord.
  • the adjacent unitary portions 4 may be welded at the inner and outer peripheries of the ring 1 in order to improve the mechanical strength, this as an alternative or in addition to detachable connection means, the internal periphery delimiting the internal cavity 2 of the crown 1.
  • a support member 6 can be adapted to those of the associated circular face 1b.
  • the support member 6 may be of circular configuration, in particular in the form of a disk, being of a diameter slightly larger than the ring 1 and being concentric with the ring 1.
  • the support member 6 may have passages 8 in the ring 1 and positioned extending parallel to the edges 4b of the adjacent unit portions 4.
  • the support member 6 may have complementary securing means 9, 10 associated with the securing means 11, 12, 12a, 14 carried by the unitary portions 4.
  • the passages 8 may be in the form of radial slots at the ring 1 and positioned in alignment with a respective notch 13 between coils 3 of adjacent unit portions 4, at this figure above each notch 13, this at least during the welding operation. It should be noted that this can also be valid for a gluing operation.
  • the notch 13 can be closed, in which case the edges 4b of the adjacent unit portions 4 partially delimiting the notch 13 are directly in contact.
  • the notch 13 may also be semi-closed in which case a space remains between the edges 4b of the adjacent unit portions 4 delimiting one side of the notch 13, as shown in FIG. 4.
  • the cords or points of welding are advantageously on the edges 4b of the unit portions 4 glued against each other so being aligned with the middle of the notch 13 respectively between two adjacent unit portions 4.
  • Bonding by welding or bonding can be done by points or weld seam or bonding on edges 4b vis-à-vis applied against each other of the two adjacent unit portions 4. This can be advantageously done on a face 1b of the two substantially circular faces 1a, 1b of the ring 1 or on both sides 1a, 1.
  • FIG 5 there is used a support member 6 for a substantially circular faces. Bonding by welding or bonding can be done by points or weld seam or bonding on edges 4b vis-à-vis applied against each other of two adjacent unit portions 4, edges 4b being accessible from the outside of the ring 1 through the lights 8 when a support member 6 is provided.
  • a circular face 1b having no support member of the two substantially circular faces 1a, 1b of the ring 1 may have the edges 4b abutting of two adjacent unit portions 4 welded or glued one against the 'other.
  • a support member 6 it is the unitary portions 4 which are secured together, either permanently, for example by gluing or welding, or removably by connecting elements, screws or technical equivalents.
  • the forms of fastening 9 carried by the support member 6 as complementary securing means may be insertion lugs 9.
  • Each insertion lug 9 may be constant prismatic shape along the length of the cleat.
  • a vertex of a triangular section of the prismatic shape can point towards the support member 6 by being fixed on this support member 6.
  • Each of the two other vertices of a triangular section of the prismatic shape can be housed in a groove 12a of a second respective axially projecting shape 12 carried near an edge 4b facing each of the two adjacent unitary portions 4 flanking the cleat 9.
  • the first form in lateral projection 14 and the second form in axial projection 12 can frame between them the insertion cleat 9 limiting its displacement.
  • the forms of connection carried by the support member 6 may be radial lights to the ring 1 passing right through the support member 6 forming mortises 0.
  • Each face of the unit portions 4 vis-à-vis the support member may then have a pin 1 as securing means carried by each unit portion 4.
  • Each pin 1 1 enters a respective mortise 10 in mounted position adjacent unit portions 4 on the crown 1. It is possible that in addition, each post 11 and the associated mortise 10 are welded together.
  • the tenon 11 can occupy only a minor portion of the upper or lower face of each unit portion 4. This has the major advantage of freeing space, the edges of the mortise 10 being directly above or below each portion 4 and not offset laterally above or below, as would be the case if it were the entire upper or lower face of the unit portion 4 which penetrated into the mortise, as shown in the most recent state of the art. close.
  • mortises 10 it can be provided more mortises 10 than ten studs 11 to provide a freedom of adaptation of a number of different unit portions 4, for example a combination of unit portions 4 of different dimensions, tenons 11 of unitary portions 4 of different dimensions remaining unchanged to fit in the same mortises 10.
  • an outer ring 7 can surround the yoke 15 of the ring 1 over its entire periphery, which allows a radial auxiliary holding unitary portions 4 secured to the ring 1 according to the different embodiments.
  • the present invention also relates to an electromagnetic machine having at least one stator carrying a series of coils 3 and at least one rotor carrying at least one magnet, characterized in that said at least one stator is a stator as previously described.
  • axial flow machine any kind of motors, generators or axial flow electromagnetic actuators.
  • This machine can be both mono-gap or poly-air gaps by having one or more stators and one or more rotors can be superimposed relative to each other being separated by at least one gap on the same shaft.
  • a support member it is preferred not to use a support member as the two substantially circular opposite faces 1a and 1b are located on the side of a respective gap.
  • the unit portions 4 may be of variable shape and size, for example twice as large or have different profiles.
  • the winding of a winding 3 is carried out on a core 5 forming a unitary portion 4 dissociated from the other unitary portions 4. This • can be done separately for each unit portion 4 then dissociated from the other unit portions 4.
  • the unitary portions 4 and individually assembled can be stored as such and for example stored until they are mounted to form the crown 1 of the stator.
  • the solutions proposed by the present invention are well suited for producing a stator with semi-closed cores or teeth and can be applied in the case of open notches.
  • the nuclei can be of variable size.
  • the invention is in no way limited to the described and illustrated embodiments which have been given by way of example only.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The present invention relates to a stator for an electromagnetic axial flow machine, the stator forming a ring (1) having two substantially circular faces (1a, 1b) connected via a thickness comprising windings (3) uniformly distributed in the ring (1). Each winding (3) is carried by a unitary portion (4) having a core (5) about which the winding (3) is wound. The unitary portions (4) are arranged concentrically, edge to edge, and have means (12, 12a, 14) for rigidly connecting same with a support member (6) optionally forming part of a housing accommodating the ring (1), which means are carried either by axial and lateral faces of each edge-to-edge unitary portion (4) or by at least one top or bottom face of each unitary portion forming part of a substantially circular face.

Description

« Stator pour machine électromagnétique à flux axial avec des portions unitaires formant une couronne du stator»  "Stator for axial flow electromagnetic machine with unitary portions forming a stator ring"
La présente invention concerne un stator pour machine électromagnétique à flux axial avec des portions unitaires formant une couronne du stator. L'invention concerne aussi une machine électromagnétique à flux axial et un procédé de montage d'un tel stator. The present invention relates to a stator for an axial flow electromagnetic machine with unitary portions forming a stator ring. The invention also relates to an axial flow electromagnetic machine and a method of mounting such a stator.
Une machine électromagnétique comprend au moins un stator et au moins un rotor, un entrefer séparant ces deux éléments. Le rotor porte au moins un aimant permanent, avantageusement une série d'aimants permanents, tandis qu'au moins une série d'éléments de bobinage est portée par le stator.  An electromagnetic machine comprises at least one stator and at least one rotor, an air gap separating these two elements. The rotor carries at least one permanent magnet, advantageously a series of permanent magnets, while at least one series of winding elements is carried by the stator.
De manière classique, chacun des éléments de bobinage comprend un noyau ou une dent portant une bobine, le noyau étant encadré sur chacun de ses côtés par une encoche, un fil métallique bon conducteur de l'électricité étant enroulé autour du noyau pour former la bobine.  Conventionally, each of the winding elements comprises a core or a tooth bearing a coil, the core being framed on each of its sides by a notch, a wire good conductor of electricity being wound around the core to form the coil .
Quand la série ou les séries de bobinages sont alimentées électriquement, le rotor qui est solidarisé à l'arbre de sortie du moteur est soumis à un couple résultant du champ magnétique, le flux magnétique créé étant un flux axial pour une machine électrique à flux axial.  When the series or series of windings are electrically powered, the rotor which is secured to the output shaft of the motor is subjected to a torque resulting from the magnetic field, the magnetic flux created being an axial flow for an axial flow electric machine .
La demande de machines électriques pouvant délivrer une puissance élevée tout en gardant un poids et un encombrement réduits est actuellement très forte.  The demand for electrical machines that can deliver high power while maintaining a reduced weight and bulk is currently very strong.
De plus, dans les applications industrielles, la réduction de la masse et de l'encombrement du moteur pour un rendement optimal, la réduction du couple de détente et de la variation du couple total sont des critères aussi importants que la facilité de réalisation, la production en série et le gain en temps de fabrication.  Moreover, in industrial applications, the reduction of the mass and the size of the motor for an optimal yield, the reduction of the relaxation torque and the variation of the total torque are criteria as important as the ease of realization, the mass production and the gain in manufacturing time.
Le document EP-A2-1624555 représentant l'état de la technique le plus proche, décrit un stator destiné à une machine électromagnétique à flux axial, le stator formant une couronne présentant deux faces opposées sensiblement circulaires, le stator étant composé de plusieurs portions unitaires définissant les deux faces opposées sensiblement circulaires, chaque portion unitaire présentant un noyau autour duquel est enroulé le bobinage, les portions unitaires formant au moins partiellement la couronne étant disposées les unes par rapport aux autres concentriquement. The document EP-A2-1624555 representing the state of the art closest, describes a stator for an electromagnetic machine with axial flow, the stator forming a ring having two substantially circular opposite faces, the stator being composed of several unitary portions. defining the two substantially circular opposite faces, each unit portion having a core around which the winding is wound, the portions units forming at least partially the ring being arranged relative to each other concentrically.
L'organe de support présente des encoches entourant chacune une portion de la périphérie d'une portion unitaire. Les encoches sont séparées par une paroi. Il s'ensuit que les portions unitaires ne peuvent être mises bord à bord et qu'il reste toujours un intervalle entre elles. Ceci ne permet pas d'obtenir un stator compact.  The support member has notches each surrounding a portion of the periphery of a unit portion. The notches are separated by a wall. It follows that the unitary portions can not be put side by side and that there is always an interval between them. This does not make it possible to obtain a compact stator.
Le document US-A-2010/275260 décrit un stator avec des bobinages formant chacune une portion unitaire. Les portions unitaires présentent à leur face supérieure un moyen de solidarisation avec un organe de support. Les bobinages sont fixés sur des sièges qui les écartent les uns des autres et empêchent leur rapprochement. Ces sièges présentent aussi l'inconvénient d'augmenter le prix du stator par la présence de pièces auxiliaires de même que le poids du stator.  US-A-2010/275260 discloses a stator with coils each forming a unit portion. The unitary portions have on their upper face a securing means with a support member. The windings are fixed on seats that separate them from each other and prevent their approximation. These seats also have the disadvantage of increasing the price of the stator by the presence of auxiliary parts as well as the weight of the stator.
Le problème à la base de la présente invention est de concevoir un stator pour une machine électromagnétique à flux axial qui soit simple de montage en étant facilement adaptable tout en permettant au stator de conserver une forme compacte en gardant une distance réduite entre les bobinages.  The problem underlying the present invention is to design a stator for an axial flow electromagnetic machine that is simple to mount by being easily adaptable while allowing the stator to maintain a compact shape while keeping a small distance between the coils.
A cet effet, on prévoit selon l'invention un stator destiné à une machine électromagnétique à flux axial, le stator formant une couronne présentant deux faces sensiblement circulaires, le stator étant composé de plusieurs portions unitaires définissant les deux faces opposées sensiblement circulaires, chaque portion unitaire présentant un noyau autour duquel est enroulé le bobinage, les portions unitaires formant au moins partiellement la couronne étant disposées les unes par rapport aux autres concentriquement, caractérisé en ce que les portions unitaires définissent en continu les deux faces opposées sensiblement circulaires en étant disposées concentriquement bord à bord les unes aux autres et présentent chacune des moyens de solidarisation, avec un organe de support faisant partie ou non d'un carter logeant la couronne, portés par des faces axiales et latérales de chaque portion unitaire bord à bord avec une portion unitaire adjacente, ou des moyens de solidarisation avec ledit organe de support portés par au moins une face supérieure ou inférieure de chaque portion unitaire faisant partie d'une face sensiblement circulaire. Les faces sont dites sensiblement circulaires car ces faces peuvent porter des moyens de solidarisation pouvant faire saillie axialement en gardant la majeure partie de la face plane et circulaire, les moyens de solidarisation n'occupant qu'une place limitée sur la face circulaire qui leur est associée. For this purpose, according to the invention, a stator is provided for an electromagnetic machine with axial flow, the stator forming a ring having two substantially circular faces, the stator being composed of several unitary portions defining the two substantially circular opposite sides, each portion unitary unit having a core around which the coil is wound, the unitary portions forming at least partially the ring being arranged relative to each other concentrically, characterized in that the unitary portions continuously define the two substantially circular opposite faces by being arranged concentrically edge-to-edge to each other and each have securing means, with a support member forming part or not of a housing housing the ring, carried by axial faces and side of each unit portion edge to edge with a unitary portion adjacent, or ground means idarization with said support member carried by at least one upper or lower face of each unit portion forming part of a substantially circular face. The faces are said to be substantially circular because these faces can carry fastening means that can protrude axially while keeping most of the planar and circular face, the securing means occupying only a limited space on the circular face which is associated.
Quand les portions unitaires sont mises bout à bout, cela signifie que les portions unitaires sont disposées adjacentes tout en formant une configuration en forme de couronne, les bords adjacents des portions unitaires s'étendant radialement. Il reste entre les portions latérales les plus en saillie vers l'extérieur de portions unitaires adjacentes un jeu juste suffisant pour l'assemblage. Il y a donc un gain de place par rapport à l'état de la technique le plus proche pour lequel les portions unitaires sont éloignées les unes des autres. Le stator ainsi réalisé est compact, d'un encombrement réduit et d'un poids allégé.  When the unit portions are placed end to end, this means that the unit portions are disposed adjacent while forming a ring-shaped configuration, the adjacent edges of the unit portions extending radially. There remains between the outermost portions of outwardly adjacent unit portions just enough clearance for assembly. There is therefore a saving of space compared to the state of the art closest to which the unit portions are distant from each other. The stator thus produced is compact, compact and light weight.
L'effet technique obtenu est une simplicité de montage. Les portions unitaires peuvent être fabriquées longtemps avant le montage dans le stator sur un autre poste de montage et sont facilement individuellement montées dans le stator. Quand un bobinage est déficient, sa portion unitaire associée peut aussi être retirée du stator facilement notamment quand chaque portion unitaire est solidarisée de manière amovible dans le stator. Il n'est plus nécessaire d'enrouler les bobinages sur un noyau déjà positionné sur le stator, ce qui procure plus de place pour l'enroulement du bobinage sur une portion unitaire séparée des autres qu'autour d'un noyau déjà positionné sur le stator.  The technical effect obtained is a simplicity of assembly. The unit portions can be manufactured long before mounting in the stator at another mounting station and are easily individually mounted in the stator. When a winding is deficient, its associated unit portion can also be removed from the stator easily, especially when each unit portion is releasably secured in the stator. It is no longer necessary to wind the coils on a core already positioned on the stator, which provides more room for winding the winding on a unit portion separate from the others than around a core already positioned on the stator.
L'effet technique est aussi une grande adaptabilité du stator. Il est par exemple possible de changer la série de bobinages de la couronne par une autre série de bobinages sans effectuer un déroulement des bobinages mais en remplaçant les portions unitaires de la couronne du stator par des portions unitaires portant un autre type de bobinage. Ces portions unitaires peuvent être de taille différente, seules les moyens de solidarisation restant les mêmes.  The technical effect is also a great adaptability of the stator. It is for example possible to change the series of windings of the ring by another series of windings without performing unwinding of the windings but replacing the unitary portions of the stator ring by unitary portions carrying another type of winding. These unit portions may be of different size, only the fastening means remaining the same.
Le stator selon la présente invention peut donc comprendre des portions unitaires faites en série indépendamment de la couronne et comprenant des moyens de solidarisation permettant d'améliorer le processus d'industrialisation du montage du stator permettant de réduire le temps et le coût de production. The stator according to the present invention may therefore comprise unitary portions made in series independently of the ring and comprising means of joining together to improve the process. industrialization of the stator assembly to reduce the time and cost of production.
Avantageusement, chaque portion unitaire présente un corps ou dent formé par un assemblage de tôles mises les unes contre les autres radialement à la couronne. Cette caractéristique est très avantageuse étant donné qu'elle permet de fabriquer de manière simple chaque portion unitaire.  Advantageously, each unitary portion has a body or tooth formed by an assembly of sheets placed against each other radially to the ring. This characteristic is very advantageous since it makes it possible to easily manufacture each unit portion.
Avantageusement, l'organe de support fait partie intégrante du carter ou est une pièce rapportée solidaire du carter. Un tel ensemble est donc plus résistant avec des éléments solidaires les uns des autres et reliés au carter ou d'un seul tenant avec le carter.  Advantageously, the support member is an integral part of the housing or is an integral insert of the housing. Such an assembly is therefore more resistant with elements integral with each other and connected to the housing or in one piece with the housing.
Avantageusement, entre deux noyaux de portions unitaires adjacentes subsiste un espace libre formant une encoche et, le cas échéant, un isthme formé par les bords situé du côté destiné à former un entrefer sur une première face circulaire de la couronne, les bords de chaque portion unitaire d'une seconde face de la couronne opposée à la première face circulaire, une première forme en saillie latérale étant comprise entre les bords des première et seconde faces de chaque côté latéral d'une portion unitaire, les portions unitaires adjacentes étant disposées bord à bord au moins par leurs premières formes en saillie latérale.  Advantageously, between two cores of adjacent unit portions, there remains a free space forming a notch and, where appropriate, an isthmus formed by the edges located on the side intended to form an air gap on a first circular face of the crown, the edges of each portion. unitary of a second face of the ring opposite to the first circular face, a first form in lateral projection being between the edges of the first and second faces of each lateral side of a unitary portion, the adjacent unitary portions being disposed at edge at least by their first forms in lateral projection.
Cette encoche permet d'espacer faiblement les bobinages les uns des autres. Les premières formes en saillie latérale de deux portions unitaires établissent un contact entre ces deux portions unitaires et aident au positionnement des portions unitaires les unes contre les autres. Ces premières formes en saillie peuvent faire partie des moyens de solidarisation latérale des portions unitaires individuellement par rapport au carter du stator, comme il sera ultérieurement précisé.  This notch allows to slightly space the windings from each other. The first side-projecting shapes of two unitary portions make contact between these two unitary portions and assist in positioning the unit portions against each other. These first protruding shapes may be part of the lateral securing means unit portions individually relative to the stator housing, as will be further specified.
Avantageusement, les moyens de solidarisation sont amovibles ou permanents, les moyens de solidarisation amovibles étant effectués par des éléments de vissage ou d'encliquetage entre les portions unitaires adjacentes et les moyens de solidarisation permanents étant effectués par soudage, collage ou par des éléments de type rivet. Les moyens de solidarisation amovibles seront préférés quand les portions unitaires sont susceptibles d'être fréquemment démontées.  Advantageously, the securing means are removable or permanent, the removable securing means being made by screwing or latching elements between the adjacent unit portions and the permanent joining means being made by welding, gluing or by elements of the type rivet. The removable securing means will be preferred when the unit portions are likely to be frequently dismantled.
Avantageusement, les moyens de solidarisation amovibles sont effectués par des éléments de vissage, de liaison ou d'encliquetage sur les bords des portions unitaires adjacentes de la seconde face en vis-à-vis et disposés bord à bord des portions unitaires adjacentes. Ainsi, les portions unitaires mises bord à bord réalisent au moins une face circulaire continue de la couronne du stator. Advantageously, the removable securing means are made by means of screwing, connecting or detent elements on the edges of the adjacent unitary portions of the second face facing each other and disposed adjacent adjacent unit portions. Thus, the unitary portions placed edge to edge realize at least one continuous circular face of the stator ring.
Avantageusement, les moyens de solidarisation permanente sont effectués par soudage, collage ou rivetage des bords en vis-à-vis et disposés bord à bord par les bords des portions unitaires adjacentes de la seconde face et l'organe de support. Ceci permet de solidariser directement les portions unitaires entre elles et évite d'utiliser un organe de support supplémentaire, ce qui représente une économie de moyens et une diminution du poids du stator.  Advantageously, the permanent securing means are made by welding, gluing or riveting the edges facing each other and arranged edge to edge by the edges of the adjacent unitary portions of the second face and the support member. This makes it possible to directly secure the unit portions together and avoids using an additional support member, which represents an economy of means and a decrease in the weight of the stator.
Avantageusement, l'organe de support présente des lumières radiales à la couronne et positionnées en s'étendant parallèlement aux bords des portions unitaires adjacentes.  Advantageously, the support member has radial lights to the ring and positioned extending parallel to the edges of the adjacent unit portions.
Avantageusement, l'organe de support présente des formes de solidarisation complémentaires associées à des formes des portions unitaires adjacentes réalisant les moyens de solidarisation portés par chaque portion unitaire.  Advantageously, the support member has complementary forms of bonding associated with forms of adjacent unitary portions forming the fastening means carried by each unit portion.
Avantageusement, les formes de solidarisation portées par l'organe de support sont des taquets d'insertion, chaque taquet d'insertion étant de forme prismatique constante ou variable sur la longueur du taquet, un sommet d'une section triangulaire de la forme prismatique pointant vers l'organe de support et chacun des deux autres sommets d'une section triangulaire de la forme prismatique se logeant dans une rainure d'une deuxième forme en saillie axiale respective portée par un bord en vis-à-vis de chacune des deux portions unitaires adjacentes, la première forme en saillie latérale et la deuxième forme en saillie axiale encadrant entre elles le taquet d'insertion.  Advantageously, the forms of attachment carried by the support member are insertion cleats, each insertion cleat being of constant or variable prismatic shape along the length of the cleat, a vertex of a triangular section of the prismatic shape pointing to the support member and each of the two other vertices of a triangular section of the prismatic shape being housed in a groove of a second respective axial projecting shape carried by an edge facing each of the two portions adjacent units, the first side-projecting shape and the second axially projecting form flanking the insertion tab.
Ceci permet un maintien axial des portions unitaires ainsi qu'une facilité de positionnement des portions unitaires par coulissement le long du taquet. La forme prismatique offre une surface de support du taquet d'insertion importante pour deux portions unitaires adjacentes. Il peut aussi être envisagé une autre forme que la forme prismatique comme par exemple une forme en demi-cylindre.  This allows axial retention of the unit portions and easy positioning of the unit portions by sliding along the cleat. The prismatic shape provides a substantial insertion cleat support surface for two adjacent unitary portions. It can also be considered another form than the prismatic shape such as a half-cylinder shape.
Avantageusement, les formes de solidarisation portées par l'organe de support sont des lumières radiales à la couronne traversant l'organe de support en formant des mortaises, en vis-à-vis de l'organe de support des portions unitaires adjacentes présentant un tenon pénétrant dans une mortaise respective en position montée des portions unitaires adjacentes sur la couronne, le tenon occupant seulement une partie mineure d'une face supérieure ou inférieure de chaque portion unitaire. Advantageously, the forms of fastening carried by the support member are radial lights to the crown passing through the body of the mortise-forming support, opposite the support member of the adjacent unitary portions having a tenon penetrating a respective mortise in the mounted position of the adjacent unitary portions on the crown, the tenon occupying only a minor portion of an upper or lower face of each unit portion.
Partie mineure signifie que la plus grande partie de la face supérieure et inférieure est libre de tout tenon. Ceci différencie un tenon selon la présente invention de la liaison selon un état de la technique où c'était toute la surface de la face supérieure ou inférieure qui formait tenon. Une liaison tenon et mortaise procure un blocage simple et efficace des portions unitaires par rapport à l'organe de support. L'occupation d'une partie mineure de la face par le tenon signifie que la majeure partie de la face supérieure ou inférieure de chaque portion unitaire n'entre pas à l'intérieur de la mortaise. Cela permet de mettre bord à bord dans une configuration circulaire les portions unitaires.  Minor part means that most of the upper and lower face is free of any tenon. This differentiates a pin according to the present invention from the connection according to a state of the art where it was the entire surface of the upper or lower face which formed tenon. A tenon and mortise connection provides a simple and effective blocking of unit portions with respect to the support member. The occupation of a minor portion of the face by the tenon means that most of the upper or lower face of each unit portion does not enter the interior of the mortise. This allows edge-to-edge in a circular configuration the unit portions.
Avantageusement, chaque tenon et la mortaise associée sont soudés l'un avec l'autre. Ceci renforce ce mode de solidarisation.  Advantageously, each tenon and the associated mortise are welded together. This reinforces this mode of solidarity.
Avantageusement, quand une culasse formant la tranche de la couronne est présente, une bague externe entoure la culasse de la couronne sur toute sa périphérie.  Advantageously, when a yoke forming the edge of the ring is present, an outer ring surrounds the yoke of the ring over its entire periphery.
Il ne peut y avoir de débattement radial des portions unitaires de bobinage hors de la couronne par l'extérieur de la couronne. La bague externe assure par frettage la tenue mécanique des portions unitaires dans la couronne.  There can be no radial deflection of the unitary winding portions out of the ring by the outside of the ring. The outer ring shrinks the mechanical strength of the unitary portions in the crown.
Avantageusement, les noyaux des portions unitaires sont réalisés avec des tôles feuilletées, des matériaux magnétiques frittés ou tout autre matériau magnétique ou amagnétique.  Advantageously, the cores of the unitary portions are made with laminated sheets, sintered magnetic materials or any other magnetic or non-magnetic material.
Avantageusement, les portions unitaires sont de formes et dimensions variables pour une même couronne. Le fait notamment que les moyens de solidarisation sur les faces supérieure ou inférieure de la portion unitaire n'occupent pas la totalité de cette face, permet d'adapter différentes formes et dimensions de portions unitaires à un même organe de support, les moyens de solidarisation restant les mêmes pour des portions unitaires différentes et pouvant s'adapter par exemple dans des mortaises similaires. Il peut être prévu plus de mortaises que de portions unitaires afin d'avoir une liberté d'adaptation de différentes portions unitaires sur le stator. L'enroulement du bobinage sur chaque portion unitaire se fait sans limite d'espace étant donné que les portions unitaires ne se trouvent pas les unes adjacentes aux autres lors de cet enroulement ce qui représente une facilité de montage impossible à obtenir pour une couronne déjà montée dans le stator pour laquelle l'espace laissé disponible entre deux éléments de bobinage est très réduit. Advantageously, the unit portions are of variable shapes and dimensions for the same ring. The fact that the securing means on the upper or lower faces of the unit portion do not occupy the entire of this face, allows different shapes and sizes of unit portions to be adapted to the same support member, the securing means remaining the same for different unit sizes and can be adapted for example in similar mortises. It can be expected more mortises than unitary portions to have a freedom of adaptation of different unitary portions on the stator. The winding of the winding on each unit portion is made without space limit since the unit portions are not adjacent to each other during this winding which represents an easy assembly impossible to obtain for a crown already mounted in the stator for which the space left between two winding elements is very small.
L'invention concerne aussi une machine électromagnétique présentant au moins un stator portant une série de bobinages et au moins un rotor portant au moins un aimant, caractérisée en ce que ledit au moins un stator est un stator tel que précédemment décrit. Cette machine peut revêtir diverses formes comme moteur, génératrice ou actionneur électromagnétique.  The invention also relates to an electromagnetic machine having at least one stator carrying a series of coils and at least one rotor carrying at least one magnet, characterized in that the at least one stator is a stator as previously described. This machine can take various forms as motor, generator or electromagnetic actuator.
D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et au regard des dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels :  Other features, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings given by way of non-limiting examples and in which:
- la figure 1 est une représentation schématique d'une vue en perspective d'un premier mode de réalisation selon la présente invention d'une couronne d'un stator comprenant des portions unitaires portant chacune un bobinage, un organe de support muni de moyens de solidarisation avec chaque portion unitaire, les bobinages et les encoches de bobinage entre les portions unitaires étant visibles à cette figure,  FIG. 1 is a schematic representation of a perspective view of a first embodiment according to the present invention of a ring of a stator comprising unitary portions each carrying a winding, a support member provided with means for integral with each unit portion, the coils and winding notches between the unit portions being visible in this figure,
- la figure 2 est une représentation schématique d'une vue en perspective du premier mode de réalisation selon la présente invention montré à la figure 1 , l'organe de support muni de taquets étant représenté à cette figure 2, certains bobinages ayant été ôtés à cette figure,  FIG. 2 is a schematic representation of a perspective view of the first embodiment according to the present invention shown in FIG. 1, the support member provided with cleats being represented in FIG. 2, certain windings having been removed from FIG. this figure,
- la figure 3 est une représentation schématique d'une vue en perspective d'un deuxième mode de réalisation selon la présente invention d'une couronne d'un stator comprenant des portions unitaires, les portions unitaires adjacentes étant solidarisées entre elles dans ce deuxième mode de réalisation, les bobinages étant représentés à cette figure 3,  FIG. 3 is a schematic representation of a perspective view of a second embodiment according to the present invention of a ring of a stator comprising unitary portions, the adjacent unitary portions being joined together in this second embodiment. embodiment, the windings being represented in this FIG. 3,
- la figure 4 est une représentation schématique d'une vue en perspective du deuxième mode de réalisation selon la présente invention montré à la figure 3, les bobinages n'étant pas représentés et les encoches de bobinage entre les portions unitaires étant visibles à cette figure 4,  FIG. 4 is a schematic representation of a perspective view of the second embodiment according to the present invention shown in FIG. 3, the windings not being represented and the winding slots between the unitary portions being visible in this figure; 4
- la figure 5 est une représentation schématique d'une vue en perspective d'un troisième mode de réalisation selon la présente invention d'une couronne d'un stator comprenant des portions unitaires, les portions unitaires adjacentes étant solidarisées entre elles dans ce mode de réalisation par l'intermédiaire d'un organe de support présentant des lumières dans ce troisième mode de réalisation, FIG. 5 is a schematic representation of a perspective view of a third embodiment according to the present invention; a ring of a stator comprising unitary portions, the adjacent unitary portions being joined together in this embodiment by means of a support member having lights in this third embodiment,
- la figure 6 est une représentation schématique d'une vue en perspective d'un quatrième mode de réalisation selon la présente invention d'une couronne d'un stator comprenant des portions unitaires, les portions unitaires adjacentes étant solidarisées entre elles dans ce mode de réalisation par l'intermédiaire d'un organe de support présentant des formes de solidarisation coopérant avec des formes complémentaires prévues sur chaque portion unitaire.  FIG. 6 is a schematic representation of a perspective view of a fourth embodiment according to the present invention of a ring of a stator comprising unitary portions, the adjacent unitary portions being joined to each other in this embodiment of FIG. realization by means of a support member having securing forms cooperating with complementary shapes provided on each unit portion.
Les figures sont données à titre d'exemples et ne sont pas limitatives de l'invention. Elles constituent des représentations schématiques de principe destinées à faciliter la compréhension de l'invention et ne sont pas nécessairement à l'échelle des applications pratiques. En particulier, les dimensions des différentes pièces ne sont pas représentatives de la réalité.  The figures are given by way of examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily at the scale of practical applications. In particular, the dimensions of the different pieces are not representative of reality.
Dans ce qui va suivre, il est fait référence à toutes les figures prises en combinaison. Quand il est fait référence à une ou des figures spécifiques, ces figures sont à prendre en combinaison avec les autres figures pour la reconnaissance des références numériques désignées.  In what follows, reference is made to all the figures taken in combination. When reference is made to one or more specific figures, these figures are to be taken in combination with the other figures for the recognition of the designated reference numerals.
Pour simplification, quand dans une figure il existe plusieurs éléments du même type comme par exemple des portions unitaires, des mortaises et tenons, des encoches, etc. , il n'est référencé qu'un seul élément par type pour simplification et clarté des figures.  For simplicity, when in a figure there are several elements of the same type such as unitary portions, mortises and tenons, notches, etc. , there is referenced only one element per type for simplicity and clarity of the figures.
En se référant à toutes les figures, la présente invention concerne un stator destiné à une machine électromagnétique à flux axial. Le stator formant une couronne 1 présentant deux faces opposées sensiblement circulaires 1 a, 1 b. Ces faces opposées sensiblement circulaires 1 a, 1 b sont reliées par une épaisseur ou tranche de la couronne 1 , pouvant former une culasse 15. La face circulaire 1a de la couronne 1 peut être la face de la couronne en vis-à- vis du rotor donc formant une partie de l'entrefer de la machine électrique comprenant le stator.  Referring to all the figures, the present invention relates to a stator for an axial flow electromagnetic machine. The stator forming a ring 1 having two substantially circular opposite faces 1a, 1b. These opposite substantially circular faces 1a, 1b are connected by a thickness or slice of the ring 1, which can form a cylinder head 15. The circular face 1a of the ring 1 may be the face of the ring opposite the rotor thus forming a part of the air gap of the electric machine comprising the stator.
La couronne 1 présente une cavité interne 2 délimitée par une périphérie interne tandis que le pourtour de la couronne peut être délimité par la culasse 15 à la périphérie externe de la couronne 1. Le stator comporte des bobinages 3 régulièrement répartis dans la couronne 1. Selon l'invention, chaque portion unitaire 4 présente un noyau 5 autour duquel est enroulé un bobinage 3, les portions unitaires 4 formant au moins partiellement la couronne 1 étant disposées les unes par rapport aux autres concentriquement et mises bord à bord. Bord à bord signifie qu'il n'existe qu'entre les bords latéraux les plus en saillie vers l'extérieur de deux portions unitaires 4 adjacentes, par exemple les bords référencés 4b ou 4a ou les premières formes en saillie latérale 14 aux figures, qu'un jeu juste suffisant pour l'assemblage des portions unitaires 4. The ring 1 has an internal cavity 2 delimited by an inner periphery while the periphery of the ring may be delimited by the yoke 15 at the outer periphery of the ring 1. The stator comprises windings 3 regularly distributed in the ring 1. According to the invention, each unit portion 4 has a core 5 around which a winding 3 is wound, the unitary portions 4 forming at least partially the ring 1 being arranged, some by compared to others concentrically and put aboard. Edge to edge means that there exists only between the outermost outward edges of two adjacent unitary portions 4, for example the edges referenced 4b or 4a or the first lateral projecting shapes 14 in the figures, that a fair game enough for the assembly of the unitary portions 4.
Une portion unitaire 4 de bobinage est montrée à distance de la couronne 1 du stator aux figures 1 , 2 et 6.  A unit winding portion 4 is shown at a distance from the ring 1 of the stator in FIGS. 1, 2 and 6.
L'ensemble des portions unitaires 4 de bobinage formant au moins partiellement la couronne 1 du stator avec les portions unitaires 4 disposées adjacentes les unes aux autres concentriquement au centre de la couronne 1.  The set of winding unit portions 4 at least partially forming the ring 1 of the stator with the unit portions 4 disposed adjacent to each other concentrically at the center of the ring 1.
Les portions unitaires 4 présentent des faces supérieure et inférieure formant respectivement la face supérieure et la face inférieure de la couronne 1 du stator. Les portions unitaires 4 présentent chacune des moyens de solidarisation 11 avec un organe de support 6 faisant partie ou non d'un carter logeant la couronne 1 , par au moins une face supérieure ou inférieure de chaque portion unitaire 4 faisant partie d'une face sensiblement circulaire 1 a, 1 b et/ou des moyens de solidarisation 12, 12a, 14 avec le carter portés par des faces axiales et latérales de chaque portion unitaire 4 bord à bord avec une portion unitaire adjacente.  The unit portions 4 have upper and lower faces respectively forming the upper face and the lower face of the ring 1 of the stator. The unitary portions 4 each have securing means 11 with a support member 6 which may or may not be part of a casing housing the ring 1, by at least one upper or lower face of each unit portion 4 forming part of a face substantially. circular 1a, 1b and / or securing means 12, 12a, 14 with the casing carried by axial and lateral faces of each unit portion 4 edge to edge with an adjacent unitary portion.
Les deux types de moyens de solidarisation 11 , 12, 12a, 14 précédemment décrits peuvent ainsi être utilisés en combinaison ou en alternative. Quand les moyens de solidarisation 11 , 12, 12a, 14 sont utilisés en combinaison, la solidarisation est plus forte et le problème de maintien des portions unitaires 4 sur le stator est résolu.  The two types of securing means 11, 12, 12a, 14 described above can thus be used in combination or alternatively. When the securing means 11, 12, 12a, 14 are used in combination, the joining is stronger and the problem of maintaining the unit portions 4 on the stator is solved.
Les bobinages 3 élémentaires portés par les portions unitaires 4 après assemblage en formant la couronne du stator peuvent être interconnectés pour former des enroulements.  The elementary windings 3 carried by the unit portions 4 after assembly by forming the stator ring can be interconnected to form windings.
Les portions unitaires 4 formant la couronne 1 du stator peuvent être réalisées avec des tôles feuilletées ou à base de matériaux magnétiques ou amagnétiques. Chaque portion unitaire 4 peut présenter ainsi un corps ou dent formé par un assemblage de tôles mises les unes contre les autres radialement à la couronne à la couronne 1. Ceci peut se faire par différentes tôles ou par une ou des tôles repliées ou enroulées plusieurs fois sur elles-mêmes. Les portions de tôle ainsi crées forment des arcs de cercle concentriques. Ceci est particulièrement bien visible aux figures 1 à 4. Une autre disposition des tôles peut cependant être mise en œuvre. The unitary portions 4 forming the ring 1 of the stator can be made with laminated sheets or based on magnetic or nonmagnetic materials. Each unit portion 4 may thus have a body or tooth formed by an assembly of sheets placed against each other radially to the crown to the crown 1. This can be done by different sheets or by one or more sheets folded or wound up several times on themselves. The sheet portions thus created form concentric circular arcs. This is particularly clearly visible in FIGS. 1 to 4. Another arrangement of the sheets can however be implemented.
Un carter, non montré aux figures peut loger la couronne 1. Dans ce cas, l'organe de support 6, si celui-ci est présent, peut faire partie du carter ou l'organe de support 6 peut être une pièce rapportée solidaire du carter, de même matériau ou de matériau différent par rapport au carter.  A housing, not shown in the figures can accommodate the ring 1. In this case, the support member 6, if it is present, may be part of the housing or the support member 6 may be an integral insert of the housing, of the same material or material different from the housing.
Entre deux noyaux 5 de portions unitaires 4 adjacentes subsiste un espace libre formant une encoche 13 et, le cas échéant, un isthme 3a formé par les bords 4a situé du côté destiné à former un entrefer sur une première face circulaire 1a de la couronne 1.  Between two cores 5 of adjacent unit portions 4 there remains a free space forming a notch 13 and, if appropriate, an isthmus 3a formed by the edges 4a located on the side intended to form an air gap on a first circular face 1a of the ring 1.
Une première forme en saillie latérale 14 peut être comprise entre les bords 4a, 4b des première et seconde faces, ceci sur chaque côté latéral d'une portion unitaire 4. Les portions unitaires 4 adjacentes sont alors disposées bord à bord au moins par leurs premières formes en saillie latérale 14 s'abutant. C'est la face 1 b de la couronne 1 destinée à se trouver opposée à l'entrefer qui peut porter un organe de support 6.  A first lateral projecting shape 14 may be between the edges 4a, 4b of the first and second faces, this on each lateral side of a unitary portion 4. The adjacent unit portions 4 are then disposed edge to edge at least by their first lateral protruding forms 14 abutting. It is the face 1b of the ring 1 intended to be opposite to the gap which can carry a support member 6.
Les premières formes en saillie latérale 14 de deux portions unitaires 4 adjacentes peuvent délimiter avec les portions d'extrémité proches des bords 4b des portions unitaires un espace de réception pour un élément de solidarisation porté par un organe de support 6, avantageusement un taquet 9.  The first lateral projecting shapes 14 of two adjacent unitary portions 4 may define, with the end portions near the edges 4b of the unitary portions, a receiving space for a securing element carried by a support member 6, advantageously a cleat 9.
Les moyens de solidarisation 11 , 12, 12a, 14 peuvent être amovibles ou permanents. Dans le premier cas, les moyens de solidarisation 1 1 , 12, 12a, 14 amovible peuvent être effectués par des éléments de vissage, des éléments de liaison ou d'encliquetage entre portions unitaires 4 adjacentes. Par exemple, les moyens de solidarisation amovibles peuvent être effectués par des éléments de vissage, de liaison ou d'encliquetage sur les bords 4b en vis-à-vis des portions unitaires 4 adjacentes.  The securing means 11, 12, 12a, 14 may be removable or permanent. In the first case, the securing means 1 1, 12, 12a, 14 removable can be performed by screwing elements, connecting elements or snap between adjacent unit portions 4. For example, the removable fastening means can be made by screwing elements, connection or snap on the edges 4b vis-à-vis the adjacent unit portions 4.
Dans le second cas, les moyens de solidarisation 1 , 12, 12a, 14 permanente peuvent être effectués par soudage, collage ou par des éléments du type rivet. Par exemple, les moyens de solidarisation 11 , 12, 12a, 14 permanente peuvent être effectués par soudage, collage ou rivetage des bords 4b en vis-à-vis des portions unitaires 4 adjacentes. Le soudage ou le collage peut s'effectuer par points ou par cordon. In the second case, the securing means 1, 12, 12a, 14 permanent can be performed by welding, gluing or by elements rivet type. For example, the securing means 11, 12, 12a, 14 permanent can be performed by welding, gluing or riveting the edges 4b vis-à-vis the adjacent unit portions 4. The welding or gluing can be done by points or by cord.
Par exemple, les portions unitaires 4 adjacentes peuvent être soudées au niveau des périphéries interne et externe de la couronne 1 afin d'améliorer la tenue mécanique, ceci en alternative ou en complément de moyens de solidarisation amovible, la périphérie interne délimitant la cavité interne 2 de la couronne 1.  For example, the adjacent unitary portions 4 may be welded at the inner and outer peripheries of the ring 1 in order to improve the mechanical strength, this as an alternative or in addition to detachable connection means, the internal periphery delimiting the internal cavity 2 of the crown 1.
Les dimensions d'un organe de support 6 peuvent être adaptées à celles de la face circulaire 1 b associée. Par exemple, l'organe de support 6 peut être de configuration circulaire, notamment sous forme d'un disque, en étant d'un diamètre un peu plus grand que la couronne 1 et en étant concentrique à la couronne 1.  The dimensions of a support member 6 can be adapted to those of the associated circular face 1b. For example, the support member 6 may be of circular configuration, in particular in the form of a disk, being of a diameter slightly larger than the ring 1 and being concentric with the ring 1.
L'organe de support 6 peut présenter des passages 8 dans la couronne 1 et positionnées en s'étendant parallèlement aux bords 4b des portions unitaires 4 adjacentes.  The support member 6 may have passages 8 in the ring 1 and positioned extending parallel to the edges 4b of the adjacent unit portions 4.
L'organe de support 6 peut présenter des moyens de solidarisation complémentaires 9, 10 associées aux moyens de solidarisation 11 , 12, 12a, 14 portés par les portions unitaires 4.  The support member 6 may have complementary securing means 9, 10 associated with the securing means 11, 12, 12a, 14 carried by the unitary portions 4.
Comme montré à la figure 5, les passages 8 peuvent être sous la forme de lumières radiales à la couronne 1 et positionnées en étant alignées à une encoche 13 respective entre bobinages 3 de portions unitaires 4 adjacentes, à cette figure au-dessus de chaque encoche 13, ceci au moins lors de l'opération de soudage. Il est à noter que ceci peut aussi être valable pour une opération de collage.  As shown in FIG. 5, the passages 8 may be in the form of radial slots at the ring 1 and positioned in alignment with a respective notch 13 between coils 3 of adjacent unit portions 4, at this figure above each notch 13, this at least during the welding operation. It should be noted that this can also be valid for a gluing operation.
L'encoche 13 peut être fermée, auquel cas les bords 4b des portions unitaires 4 adjacentes délimitant partiellement l'encoche 13 sont directement en contact. L'encoche 13 peut aussi être semi-fermée auquel cas un espace subsiste entre les bords 4b des portions unitaires 4 adjacentes délimitant un côté de l'encoche 13, comme il est montré à la figure 4.  The notch 13 can be closed, in which case the edges 4b of the adjacent unit portions 4 partially delimiting the notch 13 are directly in contact. The notch 13 may also be semi-closed in which case a space remains between the edges 4b of the adjacent unit portions 4 delimiting one side of the notch 13, as shown in FIG. 4.
Les cordons ou points de soudure se font avantageusement sur les bords 4b des portions unitaires 4 collés l'un contre l'autre donc en étant alignés avec le milieu de l'encoche 13 respective entre deux portions unitaires 4 adjacentes. Aux figures 3 et 4, il n'est pas utilisé d'organe support. La solidarisation par soudage ou collage peut se faire par points ou par cordon de soudure ou de collage sur des bords 4b en vis-à-vis appliqués l'un contre l'autre des deux portions unitaires 4 adjacentes. Cela peut se faire avantageusement sur une face 1 b des deux faces sensiblement circulaires 1 a, 1 b de la couronne 1 ou sur les deux faces 1 a, 1 . The cords or points of welding are advantageously on the edges 4b of the unit portions 4 glued against each other so being aligned with the middle of the notch 13 respectively between two adjacent unit portions 4. In Figures 3 and 4, it is not used support member. Bonding by welding or bonding can be done by points or weld seam or bonding on edges 4b vis-à-vis applied against each other of the two adjacent unit portions 4. This can be advantageously done on a face 1b of the two substantially circular faces 1a, 1b of the ring 1 or on both sides 1a, 1.
A la figure 5, il est utilisé un organe de support 6 pour une des faces sensiblement circulaires. La solidarisation par soudage ou collage peut se faire par points ou par cordon de soudure ou de collage sur des bords 4b en vis-à-vis appliqués l'un contre l'autre de deux portions unitaires 4 adjacentes, les bords 4b étant accessibles de l'extérieur de la couronne 1 à travers les lumières 8 quand un organe de support 6 est prévu.  In Figure 5, there is used a support member 6 for a substantially circular faces. Bonding by welding or bonding can be done by points or weld seam or bonding on edges 4b vis-à-vis applied against each other of two adjacent unit portions 4, edges 4b being accessible from the outside of the ring 1 through the lights 8 when a support member 6 is provided.
En alternative, une face circulaire 1 b ne présentant pas d'organe de support des deux faces sensiblement circulaires 1 a, 1 b de la couronne 1 peut présenter les bords 4b aboutant de deux portions unitaires 4 adjacentes soudés ou collés l'un contre l'autre.  Alternatively, a circular face 1b having no support member of the two substantially circular faces 1a, 1b of the ring 1 may have the edges 4b abutting of two adjacent unit portions 4 welded or glued one against the 'other.
Enfin, il est aussi possible de ne pas utiliser d'organe de support 6. Dans ce cas, ce sont les portions unitaires 4 qui sont solidarisées entre elles, soit de manière permanente, par exemple par collage ou soudage, soit de manière amovible par des éléments de liaison, de vissage ou équivalents techniques.  Finally, it is also possible not to use a support member 6. In this case, it is the unitary portions 4 which are secured together, either permanently, for example by gluing or welding, or removably by connecting elements, screws or technical equivalents.
Dans le mode de réalisation montré aux figures 1 et 2, les formes de solidarisation 9 portées par l'organe de support 6 en tant que moyens de solidarisation complémentaires peuvent être des taquets d'insertion 9. Chaque taquet d'insertion 9 peut être de forme prismatique constante sur la longueur du taquet.  In the embodiment shown in FIGS. 1 and 2, the forms of fastening 9 carried by the support member 6 as complementary securing means may be insertion lugs 9. Each insertion lug 9 may be constant prismatic shape along the length of the cleat.
Un sommet d'une section triangulaire de la forme prismatique peut pointer vers l'organe de support 6 en étant fixé sur cet organe de support 6. Chacun des deux autres sommets d'une section triangulaire de la forme prismatique peuvent se loger dans une rainure 12a d'une deuxième forme en saillie axiale 12 respective portée à proximité d'un bord 4b en vis-à-vis de chacune des deux portions unitaires 4 adjacentes encadrant le taquet 9.  A vertex of a triangular section of the prismatic shape can point towards the support member 6 by being fixed on this support member 6. Each of the two other vertices of a triangular section of the prismatic shape can be housed in a groove 12a of a second respective axially projecting shape 12 carried near an edge 4b facing each of the two adjacent unitary portions 4 flanking the cleat 9.
La première forme en saillie latérale 14 et la deuxième forme en saillie axiale 12 peuvent encadrer entre elles le taquet d'insertion 9 en limitant son débattement. Dans le mode de réalisation montré à la figure 6, les formes de solidarisation 10 portées par l'organe de support 6 peuvent être des lumières radiales à la couronne 1 traversant de part en part l'organe de support 6 en formant des mortaises 0. The first form in lateral projection 14 and the second form in axial projection 12 can frame between them the insertion cleat 9 limiting its displacement. In the embodiment shown in FIG. 6, the forms of connection carried by the support member 6 may be radial lights to the ring 1 passing right through the support member 6 forming mortises 0.
Chaque face des portions unitaires 4 en vis-à-vis de l'organe de support peut alors présenter un tenon 1 en tant que moyens de solidarisation portés par chaque portion unitaire 4. Chaque tenon 1 1 pénètre dans une mortaise 10 respective en position montée des portions unitaires 4 adjacentes sur la couronne 1. Il est possible qu'en complément, chaque tenon 11 et la mortaise 10 associée soient soudés l'un avec l'autre.  Each face of the unit portions 4 vis-à-vis the support member may then have a pin 1 as securing means carried by each unit portion 4. Each pin 1 1 enters a respective mortise 10 in mounted position adjacent unit portions 4 on the crown 1. It is possible that in addition, each post 11 and the associated mortise 10 are welded together.
Le tenon 11 peut occuper seulement une partie mineure de la face supérieure ou inférieure de chaque portion unitaire 4. Ceci présente l'avantage majeur de libérer de la place, les bords de la mortaise 10 étant directement au-dessus ou en dessous de chaque portion unitaire 4 et non décalés latéralement au-dessus ou en dessous, comme cela serait le cas si c'était toute la face supérieure ou inférieure de la portion unitaire 4 qui pénétrait dans la mortaise, comme montré dans l'état de la technique le plus proche.  The tenon 11 can occupy only a minor portion of the upper or lower face of each unit portion 4. This has the major advantage of freeing space, the edges of the mortise 10 being directly above or below each portion 4 and not offset laterally above or below, as would be the case if it were the entire upper or lower face of the unit portion 4 which penetrated into the mortise, as shown in the most recent state of the art. close.
Il peut être prévu plus de mortaises 10 que de tenons 11 pour offrir une liberté d'adaptation d'un nombre de portions unitaires 4 différents, par exemple une combinaison de portions unitaires 4 de différentes dimensions, les tenons 11 de portions unitaires 4 de différentes dimensions restant inchangées pour s'adapter dans les mêmes mortaises 10.  It can be provided more mortises 10 than ten studs 11 to provide a freedom of adaptation of a number of different unit portions 4, for example a combination of unit portions 4 of different dimensions, tenons 11 of unitary portions 4 of different dimensions remaining unchanged to fit in the same mortises 10.
Pour ces deux modes de réalisation, il est possible de solidariser les portions unitaires 4 entre elles sur la face circulaire 1 a, 1 b opposée à celle portant des formes de solidarisation 9, 0. Il est même possible de prévoir un organe de support 6 pour cette face circulaire 1 a, 1b opposée. Ceci n'est pas montré aux figures 1 , 2 et 6.  For these two embodiments, it is possible to secure the unit portions 4 to each other on the circular face 1a, 1b opposite to that carrying the forms of attachment 9, 0. It is even possible to provide a support member 6 for this opposite circular face 1 a, 1b. This is not shown in Figures 1, 2 and 6.
Il est à garder à l'esprit que tous les modes de réalisation précédemment détaillés peuvent être combinés les uns aux autres, deux organes de support, un seul organe de support 6 ou aucun organe de support 6 pouvant être utilisés.  It should be borne in mind that all the previously detailed embodiments can be combined with each other, two support members, a single support member 6 or no support members 6 can be used.
Dans certains modes de réalisation, quand une culasse 15 est présente sur la tranche de la couronne 1 , une bague externe 7 peut entourer la culasse 15 de la couronne 1 sur toute sa périphérie, ce qui permet un maintien auxiliaire radial des portions unitaires 4 solidarisées à la couronne 1 selon les différents modes de réalisation. In some embodiments, when a yoke 15 is present on the edge of the ring 1, an outer ring 7 can surround the yoke 15 of the ring 1 over its entire periphery, which allows a radial auxiliary holding unitary portions 4 secured to the ring 1 according to the different embodiments.
La présente invention concerne aussi une machine électromagnétique présentant au moins un stator portant une série de bobinages 3 et au moins un rotor portant au moins un aimant, caractérisée en ce que ledit au moins un stator est un stator tel que précédemment décrit.  The present invention also relates to an electromagnetic machine having at least one stator carrying a series of coils 3 and at least one rotor carrying at least one magnet, characterized in that said at least one stator is a stator as previously described.
Par machine à flux axial électrique il est entendu toute sorte de moteurs, de génératrices ou d'actionneurs électromagnétiques à flux axial. Cette machine peut être aussi bien mono-entrefer que poly-entrefers en présentant un ou plusieurs stators et un ou plusieurs rotors pouvant se superposer les uns par rapport aux autres en étant séparés par au moins un entrefer sur un même arbre. Dans une machine électrique poly-entrefers, il est préféré de ne pas utiliser d'organe de support comme les deux faces opposées sensiblement circulaires 1 a et 1 b sont situés du côté d'un entrefer respectif.  By axial flow machine is meant any kind of motors, generators or axial flow electromagnetic actuators. This machine can be both mono-gap or poly-air gaps by having one or more stators and one or more rotors can be superimposed relative to each other being separated by at least one gap on the same shaft. In a poly-air-electric machine, it is preferred not to use a support member as the two substantially circular opposite faces 1a and 1b are located on the side of a respective gap.
Pour une même couronne 1 , les portions unitaires 4 peuvent être de formes et de dimensions variables, par exemple deux fois plus grandes ou présenter des profils différents.  For the same ring 1, the unit portions 4 may be of variable shape and size, for example twice as large or have different profiles.
Dans un procédé de fabrication d'un tel stator et d'une machine électromagnétique, il est effectué l'enroulement d'un bobinage 3 sur un noyau 5 formant une portion unitaire 4 dissociée des autres portions unitaires 4. Ceci •peut être fait séparément pour chaque portion unitaire 4 alors dissociée des autres portions unitaires 4. In a method for manufacturing such a stator and an electromagnetic machine, the winding of a winding 3 is carried out on a core 5 forming a unitary portion 4 dissociated from the other unitary portions 4. This • can be done separately for each unit portion 4 then dissociated from the other unit portions 4.
Ceci peut être fait dans un autre poste que le poste de montage du stator et pas forcément directement avant le montage du stator. Les portions unitaires 4 ainsi unitairement assemblées peuvent être conservées telles quelles et par exemple stockées en attendant d'être montées pour former la couronne 1 du stator.  This can be done in another position than the stator mounting station and not necessarily directly before mounting the stator. The unitary portions 4 and individually assembled can be stored as such and for example stored until they are mounted to form the crown 1 of the stator.
Il est ensuite effectué la solidarisation des portions unitaires 4 entre elles et/ou au moins à un organe de support 6 pour former la couronne 1 du stator.  It is then carried out the joining of the unit portions 4 between them and / or at least to a support member 6 to form the crown 1 of the stator.
Les solutions que propose la présente invention sont bien adaptées pour la réalisation d'un stator avec des noyaux ou dents semi-fermés et peuvent être appliquées dans le cas d'encoches ouvertes. Les noyaux peuvent être de dimension variable. L'invention n'est nullement limitée aux modes de réalisation décrits et illustrés qui n'ont été donnés qu'à titre d'exemples. The solutions proposed by the present invention are well suited for producing a stator with semi-closed cores or teeth and can be applied in the case of open notches. The nuclei can be of variable size. The invention is in no way limited to the described and illustrated embodiments which have been given by way of example only.

Claims

REVENDICATIONS
1. Stator destiné à une machine électromagnétique à flux axial, le stator formant une couronne (1) présentant deux faces opposées sensiblement circulaires (1a, 1 b), le stator étant composé de plusieurs portions unitaires (4) définissant les deux faces opposées sensiblement circulaires (1 a, 1 b), chaque portion unitaire (4) présentant un noyau (5) autour duquel est enroulé le bobinage (3), les portions unitaires (4) formant au moins partiellement la couronne (1) étant disposées les unes par rapport aux autres concentriquement, caractérisé en ce que les portions unitaires (4) définissent en continu les deux faces opposées sensiblement circulaires (1 a, 1 b) en étant disposées concentriquement bord à bord les unes aux autres et présentent des moyens de solidarisation (12, 12a, 14) avec un organe de support (6) faisant partie ou non d'un carter logeant la couronne (1), portés par des faces axiales et latérales de chaque portion unitaire (4) bord à bord avec une portion unitaire adjacente, ou des moyens de solidarisation (11) avec ledit organe de support (6) portés par au moins une face supérieure ou inférieure de chaque portion unitaire faisant partie d'une face sensiblement circulaire. 1. Stator for an electromagnetic machine with axial flow, the stator forming a ring (1) having two substantially circular opposite faces (1a, 1b), the stator being composed of several unitary portions (4) defining the two opposite faces substantially circular (1 a, 1 b), each unit portion (4) having a core (5) around which is wound the winding (3), the unitary portions (4) forming at least partially the ring (1) being arranged one relative to one another concentrically, characterized in that the unitary portions (4) continuously define the two substantially circular opposite faces (1a, 1b) being arranged concentrically edge-to-edge to each other and have securing means ( 12, 12a, 14) with a support member (6), which may or may not be part of a housing housing the ring gear (1), carried by axial and lateral faces of each unitary portion (4) edge-to-edge with a unitary portion adjacent, or securing means (11) with said support member (6) carried by at least one upper or lower face of each unit portion forming part of a substantially circular face.
2. Stator selon la revendication précédente, dans lequel chaque portion unitaire (4) présente un assemblage de tôles mises les unes contre les autres radialement à la couronne (1). 2. Stator according to the preceding claim, wherein each unit portion (4) has an assembly of plates placed against each other radially to the ring (1).
3. Stator selon l'une quelconque des deux revendications précédentes, dans lequel l'organe de support (6) fait partie intégrante du carter ou est une pièce rapportée solidaire du carter. 3. Stator according to any one of the two preceding claims, wherein the support member (6) is an integral part of the housing or is an integral part of the housing.
4. Stator selon l'une quelconque des trois revendications précédentes, dans lequel entre deux noyaux (5) de portions unitaires (4) adjacentes subsiste un espace libre formant une encoche (13) et, le cas échéant, un isthme (13a) formé par les bords (4a) situé du côté destiné à former un entrefer sur une première face circulaire (1 a) de la couronne (1), les bords (4b) de chaque portion unitaire (4) d'une seconde face (1 b) de la couronne (1) opposée à la première face circulaire (1a), une première forme en saillie latérale (14) étant comprise entre les bords (4a, 4b) des première et seconde faces de chaque côté latéral d'une portion unitaire (4), les portions unitaires (4) adjacentes étant disposées bord à bord au moins par leurs premières formes en saillie latérale (14). 4. Stator according to any one of the three preceding claims, wherein between two cores (5) of adjacent unit portions (4) remains a free space forming a notch (13) and, where appropriate, an isthmus (13a) formed by the edges (4a) located on the side intended to form an air gap on a first circular face (1 a) of the ring (1), the edges (4b) of each unit portion (4) of a second face (1b) of the ring (1) opposite to the first circular face (1a), a first side projecting shape (14) being between the edges (4a, 4b) first and second faces of each lateral side of a unitary portion (4), the adjacent unitary portions (4) being disposed edge to edge at least by their first lateral projecting shapes (14).
5. Stator selon la revendication précédente, dans lequel les moyens de solidarisation (12, 12a, 14) sont amovibles ou permanents, les moyens de solidarisation amovibles (12, 12a, 14) étant effectués par des éléments de vissage ou d'encliquetage entre les portions unitaires (4) adjacentes et les moyens de solidarisation permanents étant effectués par soudage, collage ou par des éléments de type rivet. 5. Stator according to the preceding claim, wherein the securing means (12, 12a, 14) are removable or permanent, the removable fastening means (12, 12a, 14) being made by screwing elements or latching between the unitary portions (4) adjacent and the permanent joining means being made by welding, gluing or rivet-type elements.
6. Stator selon la revendication 5, dans lequel les moyens de solidarisation amovibles effectués par des éléments de vissage, de liaison ou d'encliquetage sont actifs sur les bords (4b) des portions unitaires (4) adjacentes de la seconde face (1b) en vis-à-vis et disposés bout à bout. 6. Stator according to claim 5, wherein the removable fastening means made by screwing elements, connection or latching are active on the edges (4b) of the adjacent unit portions (4) of the second face (1b). vis-à-vis and arranged end to end.
7. Stator selon la revendication 5, dans lequel les moyens de solidarisation permanents sont effectués par soudage, collage ou rivetage des bords en vis-à-vis des portions unitaires (4) adjacentes de la seconde face (1b) et l'organe de support (6). 7. Stator according to claim 5, wherein the permanent fastening means are made by welding, gluing or riveting the edges vis-à-vis the adjacent unitary portions (4) of the second face (1b) and the body of support (6).
8. Stator selon l'une quelconque des revendications 4 à 7, dans lequel l'organe de support (6) présente des lumières (8) radiales à la couronne (1) et positionnées en s'étendant parallèlement aux bords (4b) des portions unitaires (4) adjacentes. 8. Stator according to any one of claims 4 to 7, wherein the support member (6) has lights (8) radial to the ring (1) and positioned extending parallel to the edges (4b) of the unitary portions (4) adjacent.
9. Stator selon la revendication précédente, dans lequel l'organe de support (6) présente des formes de solidarisation complémentaires (9, 9. Stator according to the preceding claim, wherein the support member (6) has complementary forms of attachment (9,
10) associées à des formes (11 , 12, 12a, 14) des portions unitaires (4) adjacentes réalisant les moyens de solidarisation portés par chaque portion unitaire (4). 0. Stator selon la revendication 9, dans lequel les formes de solidarisation portées par l'organe de support (6) sont des taquets d'insertion (9), chaque taquet d'insertion (9) étant de forme prismatique constante ou variable sur la longueur du taquet, un sommet d'une section triangulaire de la forme prismatique pointant vers l'organe de support (6) et chacun des deux autres sommets d'une section triangulaire de la forme prismatique se logeant dans une rainure (12a) d'une deuxième forme en saillie axiale (12) respective portée par un bord en vis-à-vis de chacune des deux portions unitaires (4) adjacentes, la première forme en saillie latérale (14) et la deuxième forme en saillie axiale (12) encadrant entre elles le taquet d'insertion (9). 10) associated with shapes (11, 12, 12a, 14) of unitary portions (4) adjacent providing the fastening means carried by each unit portion (4). 0. Stator according to claim 9, wherein the forms of attachment carried by the support member (6) are insertion cleats (9), each insertion cleat (9) being of constant or variable prismatic shape along the length of the cleat, a vertex of a triangular section of the prismatic shape pointing towards the support member (6) and each of the two other vertices of a triangular section of the prismatic shape housed in a groove (12a) of a second axially projecting respective shape (12) carried by an edge facing each of the two adjacent unitary portions (4), the first form projecting side (14) and the second axially projecting form (12) flanking the insertion tab (9).
11. Stator selon la revendication 9, dans lequel les formes de solidarisation portées par l'organe de support (6) sont des lumières radiales à la couronne (1) traversant l'organe de support (6) en formant des mortaises (10), en vis-à-vis de l'organe de support (6) des portions unitaires (4) adjacentes présentant un tenon (11) pénétrant dans une mortaise (10) respective en position montée des portions unitaires (4) adjacentes sur la couronne, le tenon (11) occupant seulement une partie mineure de la face supérieure ou inférieure de chaque portion unitaire (4). 11. Stator according to claim 9, wherein the forms of attachment carried by the support member (6) are radial lights to the ring (1) passing through the support member (6) forming mortises (10). against the supporting member (6), adjacent unitary portions (4) having a tenon (11) penetrating a respective mortise (10) in the mounted position of the adjacent unitary portions (4) on the crown the tenon (11) occupying only a minor portion of the upper or lower face of each unit portion (4).
12. Stator selon la revendication précédente, dans lequel chaque tenon (1 1 ) et la mortaise (10) associée sont soudés l'un avec l'autre. 12. Stator according to the preceding claim, wherein each pin (1 1) and the mortise (10) associated are welded to each other.
13. Stator selon l'une quelconque des revendications précédentes, dans lequel, quand une culasse (15) formant la tranche de la couronne (1 ) est présente, une bague externe (7) entoure la culasse (15) de la couronne (1) sur toute sa périphérie. 13. Stator according to any one of the preceding claims, wherein, when a yoke (15) forming the edge of the ring (1) is present, an outer ring (7) surrounds the yoke (15) of the ring (1). ) on its entire periphery.
14. Stator selon l'une quelconque des revendications précédentes, dans lequel les noyaux (5) des portions unitaires (4) sont réalisés avec des tôles feuilletées, des matériaux magnétiques frittés ou tout autre matériau magnétique ou amagnétique. 14. Stator according to any one of the preceding claims, wherein the cores (5) of the unit portions (4) are made with laminated sheets, sintered magnetic materials or any other magnetic or non-magnetic material.
15. Stator selon l'une quelconque des revendications précédentes, dans lequel les portions unitaires (4) sont de formes et dimensions variables pour une même couronne (1). 15. Stator according to any one of the preceding claims, wherein the unit portions (4) are of varying shapes and sizes for the same ring (1).
16. Machine électromagnétique présentant au moins un stator portant une série de bobinages (3) et au moins un rotor portant au moins un aimant, caractérisée en ce que ledit au moins un stator est un stator selon l'une quelconque des revendications 1 à 15. An electromagnetic machine having at least one stator carrying a series of coils (3) and at least one rotor carrying at least one magnet, characterized in that said at least one stator is a stator according to any one of claims 1 to 15 .
EP17702416.3A 2016-01-14 2017-01-06 Stator for an axial flow machine with a stator ring composed of modules Withdrawn EP3403314A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1600078A FR3046888B1 (en) 2016-01-14 2016-01-14 STATOR FOR ELECTROMAGNETIC AXIAL FLOW MACHINE WITH UNIT PORTIONS FORMING A STATOR CROWN
PCT/FR2017/000007 WO2017121941A1 (en) 2016-01-14 2017-01-06 Stator for an axial flow machine with a stator ring composed of modules

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EP3403314A1 true EP3403314A1 (en) 2018-11-21

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EP (1) EP3403314A1 (en)
JP (1) JP2019519181A (en)
CN (1) CN108432089B (en)
CA (1) CA3011515A1 (en)
FR (1) FR3046888B1 (en)
WO (1) WO2017121941A1 (en)

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CA3011515A1 (en) 2017-07-20
FR3046888B1 (en) 2021-10-22
CN108432089B (en) 2021-03-26
US20190013707A1 (en) 2019-01-10
FR3046888A1 (en) 2017-07-21
US10971959B2 (en) 2021-04-06
CN108432089A (en) 2018-08-21
WO2017121941A1 (en) 2017-07-20
JP2019519181A (en) 2019-07-04

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