Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K19/00—Synchronous motors or generators
  • H02K19/02—Synchronous motors
  • H02K19/10—Synchronous motors for multi-phase current
  • H02K19/103—Motors having windings on the stator and a variable reluctance soft-iron rotor without windings
• • 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
  • H02K1/17—Stator cores with permanent magnets
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/14—Stator cores with salient poles
  • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
  • H02K1/148—Sectional cores
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/16—Stator cores with slots for windings
• • 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
  • H02K21/02—Details
  • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
  • H02K21/046—Windings on magnets for additional excitation ; Windings and magnets for additional excitation with rotating permanent magnets and stationary field winding
• • 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
  • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
  • H02K21/40—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with flux distributors rotating around the magnets and within the armatures
• • 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
  • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
  • H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
  • H02K41/02—Linear motors; Sectional motors
  • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
  • H02K41/02—Linear motors; Sectional motors
  • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
  • H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
  • H02K41/033—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type with armature and magnets on one member, the other member being a flux distributor
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
  • H02K2201/15—Sectional machines
• • 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
  • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
  • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

• the invention relates generally to electrical machines. It relates in particular to a flow-switched electrical machine.
• the invention particularly relates to a so-called single excitation machine, that is to say comprising only one magnetic excitation source, namely excitation windings, the machine being devoid of magnets.
• Electrical machines are used in a variety of applications, in particular as alternators, for example for motor vehicles or for aircraft.
• the rotating switching machines comprise a rotor and a stator, the stator carrying all the electrically or magnetically active means of the machine, that is to say all the magnets and / or excitation coils. or armature coils.
• Similar linear machines exist, in which the rotor is replaced by a member movable in translation relative to the stator.
• the rotor - or moving element - is itself devoid of magnet or winding, and is made of a ferromagnetic material for the circulation of a magnetic field.
• flux-commutated machines are freed from the need to use rubbing contacts (brushes), they have a greater mechanical strength and are more reliable in use.
• the rotor of a flow-switching machine is simpler and therefore less expensive to produce.
• a flux switching machine is known from EP 2,002,529.
• This machine comprises a rotor, devoid of active electrical or magnetic means, and a stator.
• the stator is subdivided into a set of elementary cells such that each cell comprises a permanent magnet as well as notches housing an armature winding and at least a portion of an excitation winding.
• This machine has already rendered great services in that it allows in particular to control the value of the induced voltage.
• this machine has the particularity of being a double excitation machine, that is to say that it comprises both excitation coils and permanent magnets.
• One of the aims of the invention is to propose an electric machine whose size and production cost are reduced compared to the prior art.
• an object of the invention is to provide an electric machine that can operate without a permanent magnet, and without crossing windings.
• the subject of the invention is a flow switching device comprising:
• a movable member comprising a plurality of flux switching teeth
• stator comprising a plurality of teeth, excitation coils and armature coils
• each half-notch housing at least partly an armature coil, so that two successive elementary cells share a common lateral notch.
• the machine according to the invention may further comprise at least one of the following features: in which the central tooth of an elementary cell of the stator may comprise a vertex having an angular aperture 9 C of between 0.6 * 9 and 0.75 * 9, where 9 is the angular aperture of the mean difference between two consecutive teeth of the stator, defined by
• N is the number of stator teeth.
• each lateral tooth of an elementary cell of the stator may comprise a vertex having an angular opening 9
• N is the number of stator teeth.
• the lateral teeth of an elementary cell of the stator can be separated from the central tooth by a difference of between 9 and 1.15 * 9, where 9 is the opening angle of the mean difference between two consecutive teeth of the stator, defined by
• N is the number of stator teeth.
• the teeth of an elementary cell of the stator may have a width at their base greater than the width at their apex.
• the armature windings can be distributed in a number Q of armature phases greater than or equal to 1, and the stator comprises a number N of teeth such that
• n is the number, greater than or equal to 1, of windings per armature phase.
• the machine being of rotating machine type and the moving element being a rotor
• N is even and the number of teeth of the rotor is even.
• each armature winding can be received in the two lateral notches of an elementary cell and wound around the three teeth of the cell.
• the armature windings can be arranged in such a way that there is no crossing between them.
• each elementary cell may comprise an armature winding wound around its three teeth and the armature windings may be divided into three phases A, B, and C arranged so that:
• the coils of the same phase are wound around the teeth of adjacent cells, or
• the lateral notches of at least one elementary cell can accommodate different armature winding parts.
• each elementary cell of the stator may further comprise at least one permanent magnet.
• each elementary cell may comprise a permanent magnet housed in the central tooth or two permanent magnets received respectively in the central notches.
• the machine comprises an axial stack of stators and moving elements, and only a fraction of the stator length comprises permanent magnets.
• the proposed electrical machine comprises a succession of elementary cells comprising three teeth delimiting two central notches in which an excitation coil is housed, and lateral notches that can accommodate at least a portion of at least one armature coil.
• This machine is a flux switching machine in which the rotor or the movable element is devoid of electrically or magnetically active elements such as permanent magnets or coils.
• the stator may also be devoid of permanent magnets, so that the machine can operate with only exciting excitation coils. The production cost of this machine is reduced compared to a machine comprising permanent magnets.
• the configuration of the cells notably allows a configuration in which the lateral notches of a cell house an armature winding surrounding the excitation winding.
• This type of configuration has a reduced size and cost due to the absence of crossover between the excitation winding and the winding or coils of armatures.
• the machine is also simpler to produce and more efficient because the required winding lengths are reduced compared to cross windings.
• this machine is of the rotary machine type, it advantageously allows configurations in which the number of rotor teeth and the number of armature coils per phase is even, which allows a balancing of the magnetic forces involved. on the circumference of the machine and avoids a magnetic unbalance that would degrade the performance and / or the life of the machine.
• FIG. 1 schematically represents a machine according to one embodiment of the invention
• FIGS. 2a and 2b illustrate an elementary cell of a machine according to one embodiment of the invention and the passage of the flow in this cell according to two relative positions of the rotor teeth with respect to the cell
• FIGS. 3a and 3b represent the distribution of the field lines in a machine according to two relative positions of the rotor and the stator
• FIGS. 4a to 4e show possible configurations of the armature windings in a machine according to one embodiment of the invention
• FIG. 5a represents notation conventions concerning the geometry of the stator teeth
• FIGS. 5b to 5d show embodiments of teeth of the stator
• FIG. 6 represents the performances obtained by different machines, including those of FIGS. 4a to 4e.
• FIG. 7a to 7e show alternative embodiments of a machine comprising permanent magnets.
• Figures 8a and 8b respectively show rotor and stator laminations of a prototype machine. DETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT OF THE INVENTION
• FIG. 1 there is shown schematically an electrical machine 1 flux switching according to one embodiment of the invention.
• the machine shown in Figure 1 is a rotating machine having a stator 10 and a rotor 20.
• the stator and the rotor extend coaxially around each other.
• the stator 10 is fixed and the rotor 20 is rotatable about the common axis of the stator and the rotor.
• the stator 10 extends around the rotor 20.
• the opposite can also be implemented, in which the rotor extends around the stator.
• the machine 1 could also be a linear machine in which the stator 10 extends rectilinearly and the rotor 20 is replaced by a movable element in translation relative to the stator. This case is shown in Figures 2a and 2b.
• the movable element 20 is devoid of any active electrical or magnetic means, and in particular it is devoid of any winding and any magnet.
• the rotor is made of a ferromagnetic material adapted to allow the circulation of a magnetic field.
• the movable element 20 may be made of iron-silicon or iron-cobalt alloy or steel.
• the movable member 20 comprises a base, for example in the form of a ring 21 in the case where it is the rotor of a rotating machine and a set of teeth 22 extending from the base 21 to the stator.
• the teeth 22 extend substantially radially from the ring 21. If, as in FIG. 1, the rotor is inside the stator, the teeth 22 extend radially outwards through report to the crown.
• the stator 10 is also made of a ferromagnetic material, for example iron or steel. It comprises a base, for example in the form of a ring 11 in the case of a rotating machine and a plurality of teeth 12 extending from the base 1 1 to the mobile element 20, the teeth 12 being separated by notches 14 .
• the stator 10 is organized in a succession of elementary cells 13, each cell cooperating with one or more teeth of the movable element 20 to form therewith a magnetic field loop of variable direction depending on the displacement of the movable element .
• this result is achieved when the difference between two successive teeth of the movable element corresponds to the difference between two stator teeth spaced apart by a third tooth.
• each elementary cell 13 has three teeth 12 successive, including a central tooth 120 and two lateral teeth 121 located on either side of the central tooth 120.
• Each elementary cell 13 also comprises two central notches 140, which are the spaces formed between the central tooth 120 and each of the two lateral teeth 121; and two lateral half-notches 141 extending on either side of the lateral teeth 121.
• the stator 10 also comprises a magnetic excitation source, in the form of excitation coils 15.
• the stator 10 comprises a plurality of excitation coils 15, in number equal to the number of elementary cells, each elementary cell 13 comprising an excitation coil 15 wound in the central notches 140 so as to surround the central tooth 120, as visible in Figures 2a and 2b.
• the excitation windings 15 of the stator are the only source of magnetic excitation of the machine 1.
• the stator does not include in this case any permanent magnet.
• the rotor - or moving element - does not include a magnetic excitation source: neither excitation winding nor permanent magnet.
• the machine 1 is a so-called flux switching machine said simple excitation.
• the machine 1 is double excitation and include permanent magnets, to ensure the machine an electromotive force even without excitation current.
• the stator 10 may comprise permanent magnets 17.
• each magnet 17 is housed in a central tooth 120 of an elementary cell 13, either in a cavity provided for this purpose, as in FIG. 7a, or at the top of the central tooth 120 as in Figure 7b.
• the central tooth 120 is truncated so that the cumulative height of the central tooth 120 and the magnet 17 relative to the base is strictly less than the distance between the base and a opposite tooth of the movable element.
• the machine is linear, and in Figure 7b, it is rotatable.
• this is non-limiting and the linear or rotary type of the machine can be combined with any permanent magnet implementation.
• each elementary cell 13 can receive two permanent magnets 17 housed in the central notches 140 of the cell.
• each central notch 140 receives a portion of an excitation coil 15 and a magnet 17.
• the portion of the excitation coil 15 received in a notch 140 is arranged against the bottom of the notch , so as to be interposed between the base 10 of the stator and the magnet 17.
• the permanent magnet 17 could be positioned between the bottom of the notch 140 and the excitation coil 15.
• electrical machines whether they are rotating or linear, can be formed by stacks of stators 10 and moving elements 20.
• the stack is made in the axis of rotation of the rotor 20.
• the stack is made along an axis orthogonal to an axis of displacement of the mobile element.
• the machine 1 is made according to this type of stack and includes magnets 17, it is advantageous that the magnets 17 are only on the stators 10 at the ends of the stack.
• the stators provided with magnets are advantageously those comprised between 0 and 20% of L on the one hand and between 80 and 100% of L on the other hand. part, preferably between 0 and 10% of L on the one hand, and between 90 and 100% of L on the other hand.
• the permanent magnets 17 since the permanent magnets 17 generate a magnetic field which disturbs the field generated by the excitation windings 15, the fact of confining these magnets at the ends of the machine makes it possible to limit the disturbances while limiting the number of magnets and so the cost of the machine.
• the stator 10 comprises a plurality of armature coils 16. As described in more detail below, the armature windings 16 may be divided into one or more phases, depending on whether the machine 1 is single phase or polyphase.
• the armature windings are distributed in a number of phases Q greater than or equal to 1, and the stator 10 comprises a number N of teeth 12 such that
• n is the number, greater than or equal to 1, of windings per armature phase.
• N is even and the number of teeth 22 of the rotor is even.
• the rotor comprises 10 teeth
• the stator comprises 6 elementary cells comprising three teeth each, ie 18 teeth.
• the rotor comprises an excitation coil 15 per cell, ie 6 coils.
• the number of phases is advantageously greater than or equal to 3, or even greater than or equal to 5, if this is permitted by the number of teeth of the stator.
• the number of phases is equal to 3, in FIGS. 4a and 4b a single winding per phase (so-called single-layer winding), ie three armature windings in total, and in FIGS. at 4th, 2 armature windings per phase (so-called double-layer winding), ie 6 armature windings in total.
• the set of armature and excitation windings 15, 16 is made of an electrically conductive material, preferably copper or a copper-based alloy.
• Each lateral half-notch 141 of an elementary cell 13 houses a portion of at least one armature winding 16.
• each armature winding 16 is wound in the lateral half-notches 141 of an elementary cell 13, around the lateral teeth 121, so as to also surround the excitation winding 15 in the central notches without surrounding a neighboring cell.
• This mode makes it possible to avoid any crossover between the windings, including between the armature windings, and thus to further simplify the manufacture of the machine 1, to limit the overall size of the machine, and to further reduce the cost by decreasing the length of the windings necessary.
• FIGS. 2a and 2b As well as to FIGS. 3a and 3b, illustrating the field lines in the machine 1 as a function of the different relative positions of the rotor or mobile element 20 and of the stator 10. This operation is identical, whether the machine is linear or rotating.
• a tooth 22 of the mobile element 20 is opposite the central tooth 120 of an elementary cell 13 of the stator.
• a loop of magnetic field is formed then, passing successively:
• each armature winding is subjected to an alternating magnetic field, inducing an alternating voltage in said armature winding.
• the same configurations can be transposed to the case of a linear machine.
• the armature winding may be called "single-layer", that is to say that each common notch formed by two adjacent half-notches 141 receives only one armature winding 16.
• the stator comprises alternately:
• FIG. 4a This case is represented in the nonlimiting example of FIG. 4a which has three elementary cells 13 * and three elementary cells 13 each comprising a coil respectively corresponding to each of the phases A, B and C.
• the armature windings can also be arranged to allow a winding crossover.
• the machine 1 may comprise one or more armature coils wound around each of the three teeth of a single elementary cell, and one or more armature coils wound around two or more elementary cells. adjacent.
• An elementary cell comprises a phase A armature winding wound around its three teeth 12, and the phase B and C armature coils are crossed by being each wound around the teeth forming two successive elementary cells 13. There remain two cells 13 * in which the excitation coil is not surrounded by armature winding.
• the armature winding can be called "double layer".
• a lateral notch formed of two adjacent half-notches may receive a portion of two different armature coils.
• the two armature coils can be arranged in different ways in the notch.
• the notch can be "divided" by a median axis extending equidistant from the teeth bordering the notch, so that each lateral half-slot 141 of an elementary cell 13 receives part of a respective winding. This is the case shown in Figures 4c to 4e.
• the notch could also be "divided" by an axis orthogonal to the median axis indicated above, extending between the teeth bordering the notch.
• This axis defines a first portion of the notch, common to the two half-notches, located for example in the bottom of the notch, and which receives a part of a first winding, and a second portion of the notch, located between the first winding and the edge of the notch, and which receives the other winding.
• the armature windings are arranged so that there is no winding crossover.
• the distribution of the windings then varies according to the number of phases and their arrangement.
• the machine 1 comprises two windings per armature phase, and each armature winding is wound around the teeth of an elementary cell, the two windings of each phase being wound around two adjacent cells. It can be seen that in this configuration in which the windings of each phase are wound around respective adjacent elementary cells, the machine does not include any winding crossover.
• n successive cells of the stator comprise windings of n different armature phases.
• each elementary cell comprises an armature winding wound around its three teeth, and the armature coils of three consecutive cells belong to the three phases A, B and C.
• FIG. 4c represents another example of a configuration in which the coils of one phase are grouped together to surround the adjacent cell teeth (phase A) and the coils of the other phases are separated to alternately surround the teeth of adjacent cells (phases B and B). VS).
• the armature windings can also be distributed so as to cross each other. Arrangement of the stator teeth
• all the central teeth of the stator have the same shape and the same dimensions
• all the lateral teeth also have the same shape and the same dimensions.
• the central teeth may be different from the lateral teeth.
• ⁇ - the angular aperture of the mean gap between the stator teeth, N being the number of stator teeth.
• the teeth 120 forming the central teeth of the elementary cells may have a width different from those forming the lateral teeth 121.
• the teeth 120 may have a constant width (measured in the tangential direction relative to the stator axis).
• the teeth of the stator may have a trapezoidal shape, preferably having a width at their base 122 greater than the width at their apex 123.
• the apex 123 denotes the side of the tooth facing the rotor teeth, and the base 122 the opposite side, through which the tooth extends from the crown 11 of the stator.
• This form may be advantageous for decreasing the concentration of magnetic flux at the base of the tooth in order to prevent the ferromagnetic material from saturating.
• the angular aperture 9 C of the central teeth is defined at the top 123 of the tooth.
• the angular aperture is replaced by the width of the tooth at its apex.
• ⁇ is a parameter characterizing the opening of the tooth, chosen preferably between 0.5 and 0.8, advantageously between 0.6 and 0.75.
• the teeth 22 of the rotor have a width equal to the width of the central teeth 120.
• the angular aperture of the lateral teeth 121 of elementary cells of the stator is also defined. As before, this opening is defined for the top 123 of a tooth. As previously, in the case of a linear machine, the angular aperture is replaced by the width of the tooth at its apex.
• ⁇ is a parameter characterizing the opening of the lateral tooth, chosen preferably less than ⁇ , for example, ⁇ may be between 0.4 and 0.7.
• ⁇ is preferably chosen to be smaller than ⁇ 0 so that the lateral teeth are narrower than the central tooth for the same cell.
• the central tooth and the lateral teeth alternately form the passage of the magnetic flux. Increasing the relative width of the central tooth relative to the lateral teeth balances the sections for the passage of the magnetic flux.
• the parameter a translating a spacing of the relative positions of the lateral teeth 121 and of the central tooth of a cell relative to the average distance between two teeth of the stator 10 is also defined.
• the average deviation has an angular aperture ⁇ already defined above.
• the distance between a lateral tooth 121 and the central tooth 120 of the same cell is advantageously equal to ⁇ (1 + a), where a is preferably between 0 and 0.15.
• Spreading the lateral teeth relative to the central tooth also reduces the torque ripples and thus smooths the torque generated by the machine.
• the proposed machine is more economical than the machines of the prior art since it has no permanent magnet and it allows to distribute the windings without any crossover. It is also less bulky and easier to manufacture.
• the "ABC-SC winding" curve corresponds to the single-layer winding without crossing of FIG. 4a,
• the "overlapping ABC winding SC" curve corresponds to the single-layer winding with crossing of FIG. 4b,
• winding AABCBC corresponds to the double-layer winding of Figure 4c
• the "winding AABBCC” curve corresponds to the winding of FIG. 4d
• the "winding ABCABC” curve corresponds to the winding of FIG. 4e.
• This prototype made it possible to obtain an average torque of 8.1 Nm against a theoretical value of 8.5 Nm for an excitation current density of 15 A / mm 2 .

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Electromagnetism (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Windings For Motors And Generators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54329650

Family Applications (1)

Country Status (4)

Family Cites Families (5)

• 2015
  • 2015-06-09 FR FR1555264A patent/FR3037450B1/fr not_active Expired - Fee Related
• 2016
  • 2016-06-08 WO PCT/EP2016/062962 patent/WO2016198422A1/fr active Application Filing
  • 2016-06-08 EP EP16729235.8A patent/EP3308452A1/de not_active Withdrawn
  • 2016-06-08 US US15/735,124 patent/US20200036242A1/en not_active Abandoned

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