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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
  • H02K7/1807—Rotary generators
  • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
  • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
• • 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
• • 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
  • H02K16/00—Machines with more than one rotor or stator
  • H02K16/04—Machines with one rotor and two stators
• • 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
  • H02K3/00—Details of windings
  • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
  • H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K16/00—Machines with more than one rotor or stator
  • H02K16/02—Machines with one stator and two or more rotors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

• the invention relates to the field of electromagnetic machines called “rotating”, that is to say equipped with a rotor and a stator.
• the subject of the invention is more particularly an electromagnetic machine of new design.
• a stator comprising a plurality of coils each formed of a winding of turns in which a current is induced when the rotor associated with the stator and provided with magnets is rotated.
• the current generated is then a function of the coils used and the magnets used.
• the winding of the coils is made along an axis substantially perpendicular to a polar face of a rotor magnet.
• the coils do not maximize the interaction between a magnet and an associated coil.
• the winding of a coil is long to achieve. Connecting coils together in the context of a miniaturized stator is a tedious step in the context of the realization of the stator.
• the object of the present invention is to propose a solution that overcomes all or part of the disadvantages listed above.
• This aim is particularly attained by the appended claims and more particularly by an electromagnetic machine comprising two first elements, preferably identical, each comprising:
• At least one second electrically conductive track arranged in the form of an annular crenellated line so as to form a second plurality of electromagnetic circuits able to interact with at least one magnetic element of the electromagnetic machine, said second track being formed along said first corresponding track and such that the circuits of the second plurality of electromagnetic circuits are each disposed between two successive circuits of the first plurality of electromagnetic circuits, and in that the first two elements are arranged on either side of a second element along an axis of rotation associated with a relative rotational movement, said second element being provided with at least one magnetic element arranged in such a way interacting with the circuits of at least one of the first two elements during the relative rotational movement between said at least one of the first two elements and the second element.
• said at least one first track comprises a plurality of electrically conductive transverse flanks each extending between a first discontinuous lateral edge of the first track and a second discontinuous lateral edge of the first track, each circuit of the first plurality of electromagnetic circuits having a pair of adjacent transverse flanks of the first track, and, for each first element, said at least one second track has a plurality of electrically conductive transverse flanks each extending between a third discontinuous lateral edge of the second track and a fourth discontinuous lateral edge of the second track, each circuit of the second plurality of electromagnetic circuits having a pair of adjacent transverse flanks of the second track, in particular the third discontinuous lateral edge is located between the first and second the discontinuous lateral edges and the second discontinuous lateral edge is located between the third and fourth discontinuous edges.
• the first discontinuous lateral edge is formed by a plurality of first electrically conductive segments each connecting two transverse flanks of the first track
• the second discontinuous lateral edge is formed by a plurality of second electrically conductive segments each connecting two transverse flanks of the first track
• the third discontinuous lateral edge is formed by a plurality of third electrically conductive segments each connecting two transverse flanks of the second track,
• the fourth discontinuous lateral edge is formed by a plurality of fourth electrically conductive segments each connecting two transverse flanks of the second track, and for each first element, the first and fourth segments each have a length greater than those of each of the second and second segments; third segments.
• each first element comprises a stack of first tracks and a stack of second tracks, in particular extending in parallel directions.
• each magnetic element of the second element is located so as to interact, during a complete revolution of one of the first or second elements around an associated axis of rotation, with each circuit of the second element. said at least one first track and / or each circuit of said at least one second track.
• each magnetic element has, in particular parallel to the conductive tracks, a section such that at all times the relative rotational movement, said magnetic element next to at most two transverse flanks of a couple of first and second tracks.
• the machine may have an overlapping configuration in which each circuit of the first plurality of electromagnetic circuits and the second plurality of electromagnetic circuits is opposite a corresponding magnetic element.
• the machine may comprise two additional elements each comprising: at least one first electrically conductive track in the form of an annular crenellated line so as to form a first plurality of electromagnetic circuits capable of interacting with at least a magnetic element of the electromagnetic machine, - at least a second electrically conductive track arranged in the form of an annular crenellated line so as to form a second plurality of electromagnetic circuits capable of interacting with at least one magnetic element of the electromagnetic machine, said second track being formed along said corresponding first track and such that the circuits of the second plurality of electromagnetic circuits are each disposed between two successive circuits of the first plurality of electromagnetic circuits, and in that said two additional elements radially surround the second element.
• the machine may comprise an operating configuration in which the interaction of each magnetic element with at least one corresponding circuit of the first element allows generation of an electric current within said corresponding circuit.
• the machine may comprise an operating configuration in which the circuits interact with at least one magnetic element (201) in order to generate the relative rotational movement.
• the second element comprises a plurality of magnetic elements arranged so as to present, opposite the first element, alternately a positive pole and a negative pole so that, during the relative rotational movement, when all The first plurality of electromagnetic circuits are each interacting with positive poles, all the circuits of the second plurality of electromagnetic circuits are each interacting with negative poles.
• said at least one magnetic element, or each of the magnetic elements never comes opposite the first, second, third and fourth discontinuous edges.
• the invention also relates to a turbine comprising an electromagnetic machine as described and wherein the second element forms a rotor capable of being rotated by a fluid.
• FIG. 1 is a front view of an electromagnetic machine element according to an embodiment of the invention, in particular intended to be used to recover an axial magnetic flux,
• FIG. 2 is a partial view of FIG. 1 showing a local enlargement of the electromagnetic machine element
• FIG. 3 is a side view of an electromagnetic machine element according to another embodiment of the invention, in particular intended to be used to recover a radial magnetic flux,
• FIG. 4 is a perspective view of an electromagnetic machine according to an embodiment of the invention.
• FIG. 5 illustrates an enlarged view of part of FIG. 4,
• FIG. 6 illustrates an electromagnetic machine forming a turbine
• the element 100 of electromagnetic machine notably forming a stator or rotor, comprises at least a first electrically conductive track 101 in the form of an annular crenellated line so as to form a first plurality of electromagnetic circuits 1 02 capable of interacting with at least one magnetic element (not shown in FIGS. 1 and 2) of the electromagnetic machine.
• the element 100 further comprises at least a second electrically conductive track 103 arranged in the form of an annular crenellated line so as to form a second plurality of electromagnetic circuits 104 capable of interacting with at least one magnetic element of the electromagnetic machine.
• Said second track 103 is formed along said corresponding first track 101 and such that circuits 104 of the second plurality of electromagnetic circuits are each disposed between two successive circuits 102 of the first plurality of electromagnetic circuits.
• the electromagnetic machine may comprise a plurality of magnetic elements.
• Each magnetic element is advantageously a dipolar magnet. That is to say a magnet comprising a north face and a south face, the field lines from the magnetic field of the magnet extending between the north and south poles of said magnet.
• electromagnettic circuit is meant here a circuit behaving similarly to a turn of a coil in the context of its interaction with a magnetic element such as a dipole magnet.
• the circuit may be an armature in which electrical current is generated during the interaction with the magnetic element in the context of an electromagnetic machine operating as an electric power generator.
• the circuit can generate a magnetic field by voluntary application of an electric current passing through said circuit, when interacting with the magnetic element (s), the electromagnetic machine then operates as a motor.
• the electromagnetic machine is typically a rotating machine comprising a stator and a rotor.
• the electromagnetic machine may be of axial magnetic flux type (preferably at least a part of the dipolar magnetic elements is then arranged such that the axis passing through the two magnetic poles of each of the magnetic elements of said at least a part of the elements magnetic is parallel to an axis of rotation A1 of the rotor of the electromagnetic machine and the tracks are arranged so as to face a pole of each magnetic element) and / or radial magnetic flux (preferably at least a portion of the magnetic elements dipoles is then located so that the axis passing through the two magnetic poles of each of the magnetic elements of said at least a portion of the magnetic elements is perpendicular to an axis of rotation A1 of the rotor of the electromagnetic machine and the tracks are arranged so to face a pole of each element ma gnetic, alternatively the axes of the magnetic elements are similar to those of the axial magnetic flux but the tracks will be arranged so as to interact with the field lines
• a pair of tracks comprising a first track and a second track is such that the first and second tracks are advantageously included in the same surface, preferably flat (for example in the plane of FIGS. 1 and 2) in order to exploit a axial magnetic flux, or cylindrical circular section ( Figure 3) to exploit a radial magnetic flux.
• the first element (s) are such that the first plurality of circuits and the second plurality of circuits do not overlap / overlap in a direction normal to the plane including a pair of first and second tracks.
• the first and second tracks are shaped (in whole or in part) in the form of a band having a section, in a plane perpendicular to the elongation at least local of the strip, square or rectangular.
• the strip then has a main face, intended to face one or more magnetic elements, perpendicular to the direction directing the thickness of the strip.
• the transverse dimensions of the main face of the strip according to its elongation at least local, preferably at any point on the track concerned, are greater than the dimension defining the thickness of the strip.
• said at least one first track 101 comprises a plurality of electrically conductive transverse flanks 105 each extending between a first discontinuous lateral edge 106 (shaped along the dotted line in FIG. 2) of the first lane 101 and a second discontinuous lateral edge 107 (shaped along the dotted line l 2 in FIG. 2) of the first lane 101.
• Each circuit 102 of the first plurality of electromagnetic circuits has a pair of adjacent transverse flanks 105 of the first track 101.
• said at least one second track 103 includes a plurality of electrically conductive transverse flanks 108 each extending between a third discontinuous side edge 109 (shaped as the dashed line 3 in Figure 2) of the second track 103 and a fourth batch lateral margin 1 10 (shaped as the dashed line 4 in Figure 2) of the second track 103.
• Each circuit 104 of the second plurality of electromagnetic circuits comprises a pair of transverse sides 108 adjacent to the second track 103
• the discontinuous lateral edges are of course electrically conductive.
• the band described above may comprise an elongation at least local for each discontinuous edge and each transverse side.
• At least the transverse flanks of the first and second tracks 101, 103 have a square or rectangular section in the form of a bar.
• This shape of section makes it possible to maximize the result of the interaction between a circuit and a magnetic element during its passage opposite the circuit.
• the discontinuous lateral edges serving as a simple electrical conductor, their sections may be circular or square or rectangular.
• the first and second tracks 101, 103 are advantageously dimensioned so that each transverse flank is part of only one circuit.
• each circuit is separated from an adjacent circuit of the same track by a distance such that the element (s) magnetic (s) can not be opposite two adjacent transverse flanks of two separate circuits of the same track.
• parasitic effects could reduce or nullify the efficiency of the electromagnetic machine.
• the third discontinuous lateral edge 109 is located between the first and second discontinuous lateral edges 106 and 107, and the second discontinuous lateral edge 107 is located between the third and fourth discontinuous edges 109 and 1 10.
• the first discontinuous lateral edge 106 is formed by a plurality of first electrically conductive segments 1 1 1 each connecting two transverse flanks 105 of the first track 101.
• the second discontinuous lateral edge 107 is formed by a plurality of second electrically conductive segments 1 12 each connecting two transverse flanks 105 of the first track 101.
• the third discontinuous lateral edge 109 is formed by a plurality of third electrically conductive segments 1 13 each connecting two transverse flanks 108 of the second track 103.
• the fourth discontinuous lateral edge 1 10 is formed by a plurality of fourth electrically conductive segments 1 4 connecting each of two transverse flanks 108 of the second track 103.
• the first and fourth segments (1 1 1, 1 14) each have a length greater than that of each of the second and third segments (1 12, 1 13). More generally, this condition on the segment lengths allows adjacent transverse flanks of two adjacent circuits (i.e., directly connected by a first segment within the first track frame or by a fourth segment within the scope of the first segment. third track) not to form an electromagnetic circuit in the sense as defined above. In other words, the magnetic element can not interact with the transverse flanks of two adjacent circuits of the same track. Such an interaction would induce parasitic effects which reduce or cancel the efficiency of the electromagnetic machine.
• first track is conferred by the fact that for each transverse side of the first track, outside the transverse flanks of the ends of the first track, said transverse flank is connected on the one hand to a previous transverse flank by a first segment and secondly to a next transverse flank by a second segment.
• first track, first segment and second segment may be replaced respectively by second track, third segment and fourth segment.
• the element comprises a stack of first tracks and a stack of second tracks.
• the stacks extend in parallel directions.
• two tracks of the same stack are separated by an electrical insulator.
• the stacks referred to above are in accordance with an axis of rotation of the rotor of the electromagnetic machine.
• the stacks referred to above are in a direction perpendicular to an axis of rotation of the rotor of the electromagnetic machine.
• the first, second, third and fourth discontinuous lateral edges of a first track and a second associated track are respectively included along each other.
• Said first, second, third and fourth circles are staggered along the same axis (forming in particular the axis of rotation of the rotor of the electromagnetic machine) and each have a radius of the same length.
• the first, second, third and fourth discontinuous lateral edges of a first track and a second associated track are respectively included along each other.
• Said first, second, third and fourth circles are included in the same plane and have the same center (in particular through which the axis of rotation of the rotor of the electromagnetic machine can pass).
• the radius of the first circle is greater than the radius of the third circle, itself greater than the radius of the second circle, itself greater than the radius of the fourth circle.
• the element referred to above and comprising the first and second tracks is a stator of the electromagnetic machine.
• the invention also relates to an electromagnetic machine, as illustrated in FIGS. 4 and 5, comprising at least a first element 100, in particular a stator, as described previously, and a second element 200, including a rotor, provided with at least one magnetic element 201 arranged to interact with the circuits (the circuits of the first plurality of circuits and the second plurality of electromagnetic circuits) of the first element 100 during a relative rotational movement between the first 100 and second 200 elements.
• relative movement of rotation between the first and second elements 100, 200 is meant that there is an axis of rotation A1 (visible in Figures 1, 3, 4 and 6) around which turns one of said first and second elements then that the other of said first and second elements remains fixed.
• the first element 100 comprises a stack of first tracks 101 and second tracks 103.
• first tracks 101 and second tracks 103 are only a particular example, in fact a single first track 101 and a single second track 103 would have just as well could be used.
• the second element 200 may comprise at least one blade 202 as illustrated in FIG. 6. Therefore, the second element 200 forms a rotor of the electromagnetic machine and the first element 100 forms the stator of the electromagnetic machine.
• a plurality of blades 202 form a helix of the rotor.
• the propellers then extend between the axis of rotation A1 of the rotor and an outer ring of the rotor bearing (or formed by) magnetic elements intended to interact with the circuits of the first element 100.
• a turbine may comprise an electromagnetic machine as described and in which the second element 200 forms a rotor capable of being rotated by a fluid.
• the first element 100 then forms the stator of the electromagnetic machine.
• the turbine can then be a wind turbine (the fluid is then air) or a tidal turbine (the fluid is then a liquid).
• the second element 200 comprises a plurality of magnetic elements 201 advantageously as described above.
• Each magnetic element 201 is then arranged so that during the rotational movement it cooperates with the different circuits of the first element 100.
• each magnetic element 201 of the second element 200 is situated so as to interact, during a complete revolution of one of the first or second elements 100, 200 around a associated rotation (preferably a complete revolution of the second element 200 forming a rotor about its axis of rotation A1), with each circuit 102 of said at least one first track 101 and / or with each circuit 104 of said at least one second track 103 This makes it possible to ensure improved performance both in the engine mode and in the generator mode of the electromagnetic machine.
• the electromagnetic machine is such that each magnetic element 201 has, in particular parallel to the conductive tracks, a section such that at all times the relative rotational movement, said magnetic element 201 does not come opposite to at most two transverse sides of 'a couple of first and second tracks.
• a face of the magnetic element 201 defining a magnetic pole (north or south) of said magnetic element 201 passes next to each circuit of the magnetic element 201.
• first element (this being especially true for each magnetic element), and this face is dimensioned such that it never covers more than two transverse flanks 105, 108 of a pair of first and second tracks of the first element 100.
• the two transverse flanks overlapped by said magnetic element belong to either the first track, the second track or the first and second tracks.
• said at least one magnetic element or each of the magnetic elements 201 never comes opposite the first , second, third and fourth discontinuous edges 106, 107, 109, 1 10.
• the face of the magnetic element defining a magnetic pole (north or south) of said magnetic element 201 goes into look at each circuit of the first element (this being especially true for each magnetic element) without ever being opposite the discontinuous edges of the first and second tracks.
• the first (s) and second (s) tracks are adapted to the shape of the magnetic element (or magnetic elements), in particular to the dimensions of the face of the element.
• the faces of all the magnetic elements arranged opposite the first element all have the same dimensions and are such that they respect the overlapping conditions as described.
• the shape of the face can then be square, rectangular, or trapezoidal.
• the crenellated line form does not imply the presence of transverse flanks parallel to each other.
• the aliasing of the line may be such that the slots have a shape tending towards the omega or the sinus.
• the transverse flanks can each extend along different radii of the same circle.
• the electromagnetic machine has an overlapping configuration in which each circuit 102, 104 of the first plurality of electromagnetic circuits and the second plurality of electromagnetic circuits is opposite a corresponding magnetic element 201.
• each circuit 102, 104 of the first plurality of electromagnetic circuits and the second plurality of electromagnetic circuits is opposite a corresponding magnetic element 201.
• the magnetic elements 201 are arranged as illustrated in FIG. 4, that is to say so as to form a magnetic ring closed.
• the second element 200 may comprise a plurality of magnetic elements 201 staggered, in particular at regular intervals, along an annular line (forming for example a circle) centered on the axis of rotation A1.
• the second element 200 comprises a plurality of magnetic elements 201 arranged so as to present, opposite the first element 100, alternately a positive pole and a negative pole so that, during the relative rotational movement, when all the circuits of the first plurality of electromagnetic circuits are each interacting with positive poles, all the circuits of the second plurality of electromagnetic circuits are each interacting with negative poles.
• the electromagnetic machine can operate in motor or generator mode.
• the electromagnetic machine may comprise an operating configuration in which the interaction of each magnetic element 201 with at least one corresponding circuit of the first element 100 enables generation of an electric current within said corresponding circuit.
• the machine The electromagnetic device may comprise, alternatively or in combination with the current generation mode, an operating configuration in which the circuits (or at least one circuit) interact with at least one magnetic element 201 to generate the relative rotational movement.
• the electromagnetic machine may comprise, as illustrated schematically in FIG. 7, two first elements 100a, 100b, preferably identical, as described and disposed on either side of the second element 200 along an axis of rotation A1 associated with the relative rotational movement.
• the element 200 forms the rotor and the elements 100a, 100b form two stators.
• one of the first two elements is configured to face one of the magnetic poles of a magnetic element during the relative rotational movement while the other of the first two elements is configured to make opposite the other of the magnetic poles of said magnetic element.
• the electromagnetic machine comprises the first two elements 100a, 100b
• said at least one magnetic element 201, and in particular each magnetic element 201 of the second element 200 is arranged so as to interact with the circuits of at least one of the first two elements 100a, 100b and preferably with the circuits of the first two elements 100a, 100b during the relative rotational movement between the first and second elements 200
• the rotational movement is said to be relative between the first two elements 100a and 100b which preferentially form a stator and the second element 200 which preferably forms a rotor.
• each of the first elements cooperates with the same second element in a similar way, notwithstanding the fact that the magnetic polarities for the same magnetic element are reversed.
• all that has been said in the present description with respect to the cooperation between the first element 100 and the second element 200 applies to the first two elements 100a, 100b when they are arranged on either side of the second element 200.
• the electromagnetic machine may also include, in addition to the first two elements 100a, 100b, a two additional elements 100c 100d (FIG. 7) each formed by another electromagnetic machine element as described (that is, i.e. having first and second tracks) and radially surrounding the second member 200.
• one of the additional members 100c is configured to interact with a first magnetic pole of an element.
• the other of the additional elements is configured to interact with a second magnetic pole (opposite the first pole) of said magnetic element.
• the plane P1 is here perpendicular to the axis of rotation A1 of the rotor preferably formed by the element 200. This makes it possible in particular to use the field lines between the two opposite magnetic poles of the same magnetic element in order to generate further more electric power.
• the first element 100 is arranged in such a way that it surrounds the second element 200.
• the first and second elements 100, 200 are included in the same plane P1 which is also the plane in particular rotation of the second element 200 that is to say perpendicular to the axis A1 of rotation.
• each magnetic element has a magnetic pole facing said first element 100, and preferably the other magnetic pole is mounted on a steel ring 220.
• the first and second tracks can be formed of copper. Such tracks can easily be made by stamping, cutting. In addition, the final shape is directly obtained without long and tedious welding steps as in the context of the coils of the prior art.
• each of the transverse flanks of the first and / or second tracks are straight, while the segments connecting two adjacent transverse flanks of the same track are curved.
• each element comprising the first and second crenellated tracks may comprise one or more magnetic cores arranged such that the first and second tracks are arranged between each magnetic element and all or part of the magnetic core or nuclei.
• the masses of magnetic material, or a part of these masses can be arranged between each transverse flank of an electromagnetic circuit. The masses of magnetic material can be arranged in such a way as to reduce the residual magnetic torque.

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• 2013
  • 2013-12-20 FR FR1363313A patent/FR3015794B1/fr not_active Expired - Fee Related
• 2014
  • 2014-12-19 CA CA2934221A patent/CA2934221A1/fr not_active Abandoned
  • 2014-12-19 EP EP14828030.8A patent/EP3084928A2/de not_active Withdrawn
  • 2014-12-19 US US15/105,432 patent/US10128724B2/en active Active
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  • 2014-12-19 WO PCT/EP2014/078698 patent/WO2015091930A2/fr active Application Filing
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