Actuator assembly for a textile machine

Abstract

The invention relates to an actuator assembly for a textile machine, wherein: the actuator assembly comprises a plurality, i.e. n, spools distributed along a depth; the actuator assembly comprises a plurality, i.e. n+1, magnetic plates distributed along the depth; the magnetic plates and the spools alternate along the depth, so that each spool is received between two adjacent magnetic plates; each magnetic plate comprises an upper permanent magnet and a lower permanent magnet having opposite orientations; the upper permanent magnets of all magnetic plates have the same orientation; the lower permanent magnets of all magnetic plates have the same orientation; each spool is movable along a height between an upper position and a lower position, and vice versa, wherein the upper position is comprised between the upper permanent magnets of two adjacent magnetic plates and the lower position is comprised between the lower permanent magnets of two adjacent magnetic plates; and each spool can be powered in two opposite ways. The invention also relates to a textile machine comprising such an actuator assembly.

Description

[0001] The present invention relates to an actuator assembly for a textile machine, and to a textile machine including such an actuator assembly.

[0002] Textile machines are adapted, in a manner well known to themselves, to transform one or more threads into textiles (e.g., fabrics, mesh fabrics, ribbons, etc.). In the following description, reference will be made to a machine for weaving ribbons. This reference should be considered to be exemplary and not restrictive, and as will be readily understood by one of skill, the invention can also be used with other similar machines.

[0003] The operation of a textile machine is known in that the warp yarns move alternately (rising and falling) in the working area, while the weft yarns pass through the openings (shuttles) formed between the warp yarns. In a manner known per se, the warp yarns move through heddles according to a predetermined weaving pattern, while the weft yarns move through weft components, which can take on different forms in different types of textile machines.

[0004] In a ribbon weaving machine, heddles are mounted on a specific frame and moved by an electromechanical actuator assembly, the basic characteristics of which will be briefly described below.

[0005] In a known manner, the actuator assembly includes multiple electromechanical linear actuators, each comprising a spool slidably mounted between two magnetic plates. Each magnetic plate includes a pair of permanent magnets oriented in opposite directions. Furthermore, each spool is mounted on a corresponding leaf spring. In the equilibrium position with the spring undeformed, the spool is positioned between the two pairs of magnets. When the spool is powered in a first manner, the electromagnetic field it generates tends to align with the first pair of magnets, and thus it moves from the equilibrium position, deforming the spring. Then, when the electric power supply to the spool is reversed, the electromagnetic field it generates also reverses, causing it to tend to move to align with the second pair of magnets. During the first portion of the movement, the spring is unloaded, providing a force that occurs simultaneously with the force generated by the electromagnetic field. Conversely, in the second portion of the movement, after passing the equilibrium position, the spring deforms again in the opposite manner. Movement is obtained again by reversing the power supply to the spool once more, and so on.

[0006] For example, this type of solution has been disclosed in patent documents EP 2 069 564 and US2009 / 277529A1, under the name of the same applicant.

[0007] Even though this solution is widely used and understood, it is not without its drawbacks.

[0008] In the above structure, the distance between two adjacent magnetic plates is defined by the depth of the corresponding spring. In fact, considering the physical forces involved, the depth of the spring is greater than the depth of the spool and the associated magnet pair. This is why, in order to limit the overall depth of the actuator assembly as much as possible, and thus limit the depth of the machine's working area, the spools are arranged in an alternating manner, for example, spools at even-numbered positions are arranged above the heddles, and spools at odd-numbered positions are arranged below the heddles (see...). Figure 1 ).

[0009] In this regard, it is also worth noting that, given the given space required for the weft yarn member to move between the warp yarns, the greater the overall depth of the actuator assembly, the greater the vertical stroke of each heald frame must be to avoid any interference between the warp and weft yarn members. This is why it is preferable that the overall depth of the actuator assembly be as small as possible.

[0010] From EP2 069 564 and US 2009 / 277529 A1 Figure 4 As can be seen, the alternating arrangement of the bobbins allows for limiting the overall depth of the actuator assembly, but also significantly increases its height. Naturally, the large overall height of the actuator assembly affects the overall dimensions of the textile machine.

[0011] Therefore, the object of the present invention is to overcome the disadvantages pointed out above regarding the prior art.

[0012] Specifically, the object of the present invention is to provide an actuator assembly for a textile machine having a smaller overall size than known actuator assemblies.

[0013] Finally, the objective of this invention is to provide an actuator assembly for a textile machine that further allows the aforementioned advantages while retaining the functionality of known solutions.

[0014] This objective and these tasks are achieved by the actuator assembly according to the invention and the textile machine according to the invention. Attached Figure Description

[0015] To better understand the present invention and its advantages, some exemplary and non-limiting embodiments of the present invention are disclosed below with reference to the accompanying drawings, wherein:

[0016] - Figure 1 A schematic side view of a ribbon weaving machine according to the prior art is shown;

[0017] - Figure 2 A schematic side view of a ribbon weaving machine according to the present invention is shown;

[0018] - Figure 3 An isometric view of an actuator assembly according to the present invention is shown;

[0019] - Figure 4 It shows along Figure 3 and Figure 6 A cross-sectional view taken by line IV-IV in the diagram;

[0020] - Figures 5a-5c It shows along Figure 4 Three different views of the cross-section cut by line VV in the middle;

[0021] - Figure 6 It shows along Figure 4 A cross-sectional view taken by line VI-VI in the diagram;

[0022] - Figure 7 It shows along Figure 6 A cross-sectional view taken by line VII-VII in the diagram;

[0023] - Figure 8 It shows something similar to Figure 7 A magnified view of the details indicated in VIII; and

[0024] - Figure 9 The possible arrangement of the windings in a bobbin according to the invention is illustrated schematically.

[0025] Within the scope of this specification, certain terminological conventions have been assumed to facilitate easier and smoother reading. These conventions are explained below with reference to the accompanying drawings, in which the textile machine is shown in a suitable orientation for operation.

[0026] Since this invention is used in the presence of gravitational acceleration, it is intended that gravitational acceleration explicitly defines the vertical direction. Similarly, it is intended that, based on gravitational acceleration, terms such as "upper part" or "above" are explicitly defined relative to terms such as "lower part" or "below".

[0027] The vertical direction also defines the horizontal plane. For a properly oriented textile machine, the horizontal plane is called the plane xy, where direction y (also the depth d) is parallel to the main development of the warp yarns and the main development of the textile during processing, while direction x (also the width w) is parallel to the main development of the weft yarns and therefore perpendicular to direction y.

[0028] Again, regarding the textile machine, when it is properly oriented, the vertical direction z (which is also the stated height h) is defined. The directions x, y, and z form the right-handed Cartesian triad.

[0029] As will be readily understood by those skilled in the art, the conventions used herein are merely for the purpose of simplifying writing and making reading more fluent. No changes will occur if different conventions are used in the description of this invention.

[0030] This invention relates to an actuator assembly 20 for a textile machine 22, having a width w, a depth d, and a height h, wherein:

[0031] -Actuator assembly 20 includes a plurality of n spools 24 distributed along depth d;

[0032] -Actuator assembly 20 includes a plurality of, i.e., n+1, magnetic plates 26 distributed along depth d;

[0033] - Magnetic plates 26 and spools 24 alternate along depth d, such that each spool 24 is received between two adjacent magnetic plates 26;

[0034] - Each magnetic plate 26 includes an upper permanent magnet 28 and a lower permanent magnet 30 with opposite orientations;

[0035] -The upper permanent magnets 28 of all magnetic plates 26 have the same orientation;

[0036] -The lower permanent magnets 30 of all magnetic plates 26 have the same orientation;

[0037] - Each spool 24 is movable along a height h between an upper position and a lower position, and is also movable along a height h between a lower position and an upper position, wherein the upper position is at least partially included between the upper permanent magnets 28 of two adjacent magnetic plates 26, and the lower position is at least partially included between the lower permanent magnets 30 of two adjacent magnetic plates 26; and

[0038] - Each spool 24 can be powered in two opposite ways.

[0039] Preferably, the upper part is completely contained between the upper permanent magnets 28 of the two adjacent magnetic plates 26, and the lower part is completely contained between the lower permanent magnets 30 of the two adjacent magnetic plates 26.

[0040] Those skilled in the art will readily understand from the brief description above that the actuator assembly 20 of the present invention includes n linear actuators 32, each linear actuator 32 being formed by a spool 24 and two magnetic plates 26 adjacent to the spool. Of course, except for the first and last magnetic plates 26, each magnetic plate 26 is simultaneously part of two linear actuators 32.

[0041] Advantageously, each magnetic plate 26 typically has a main expanding development in a plane xz and includes a frame structure 34 within which permanent magnets 28, 30 are mounted. Preferably, the frame structure 34 is made of a material that does not interfere with the magnetic field generated by the permanent magnets 28, 30, such as a non-magnetic or paramagnetic material. For example, the frame structure 34 may be made of a polymer, a composite material, or aluminum.

[0042] Advantageously, the permanent magnets 28 and 30 included in the magnetic plate 26 have a predominantly extended portion in the plane xz. More specifically, the width w and height h of the permanent magnets 28 and 30 are significantly greater than their depth d. In this respect, Figure 6 and Figure 7 Because they are drawn to the same scale, they can be compared. Figure 6 In this context, the width w and height h can be understood as the width w and height h of the two permanent magnets (the upper permanent magnet 28 and the lower permanent magnet 30, respectively) of the magnetic plate 26. Figure 7 In this context, depth d can be understood as the depth d of each magnetic plate 26 and each spool 24 that alternates therein. Within the depth d of each magnetic plate 26, there is the depth d of the corresponding permanent magnets 28 and 30.

[0043] Refer again Figure 6 and Figure 7 The orientation of the permanent magnets 28 and 30 is described in more detail. As briefly provided above, in each magnetic plate 26, the upper permanent magnet 28 and the lower permanent magnet 30 have opposite orientations. In other words, referring to... Figure 6 For example, if the visible surface of the upper permanent magnet 28 represents its north pole, then the visible surface of the lower permanent magnet 30 represents its south pole; conversely, if the visible surface of the upper permanent magnet 28 represents its south pole, then the visible surface of the lower permanent magnet 30 represents its north pole. From this fact, it can be concluded that... Figure 6 The magnetic fields generated by the two permanent magnets 28 and 30 visible in the figure are perpendicular to the plane of the attached figure, entering in one instance and leaving in the other instance.

[0044] Furthermore, as briefly provided above, the upper permanent magnets 28 of all magnetic plates 26 have the same orientation, and correspondingly, the lower permanent magnets 30 of all magnetic plates 26 have the same orientation. In other words, regarding Figure 7 For example, if the upper permanent magnet 28 generates a magnetic field oriented from left to right, then the lower permanent magnet 30 generates a magnetic field oriented from right to left; conversely, if the upper permanent magnet 28 generates a magnetic field oriented from right to left, then the lower permanent magnet 30 generates a magnetic field oriented from left to right. Those skilled in the art will readily understand that, although... Figure 7There are no magnetic field lines in the actuator assembly 20, but the magnetic fields generated by the upper permanent magnet 28 and the lower permanent magnet 30 are closed to each other outside the actuator assembly 20.

[0045] Preferably, each magnetic plate 26 includes two metal foils 36 (see details). Figure 8 These elements extend in the plane xz and cover the permanent magnets 28 and 30. In this way, a smooth and wear-resistant surface is obtained. Furthermore, the metal foil 36 allows for effective heat dissipation, the advantages of which will become clear from the description below.

[0046] Reference Figures 5a-5c Each of the n spools 24 includes at least one winding 38, and each winding includes a wire consisting of a plurality of concentric and coplanar loops. Preferably, the wire has a rectangular cross-section to maximize the metal density in the winding 38.

[0047] Preferably, each spool 24 includes two windings 38, which are placed close together along depth d (see...). Figure 8 Specifically, see the following: Figure 9 The schematic diagram shows that the two windings 38 are electrically connected to each other at their respective innermost loops, such that the outer electrical connection portion 39 can be obtained on the opposite side at its periphery along the width w, without any wire portion overlapping the windings 38.

[0048] Each spool 24 has a main unfolded portion in the plane xz. Specifically, the width w and height h of the spool 24 are significantly greater than the depth d. Preferably, the spool 24 has a generally rectangular shape. Therefore, in each ring and in each spool 24, two horizontal segments (mainly arranged along x or width) and two vertical segments (mainly arranged along z or height) can be identified. As mentioned above, each spool 24 can be powered in two opposite ways, i.e., referring again... Figures 5a-5c The spool 24 can be powered so that the current circulates in a clockwise direction (clockwise power) or in a counterclockwise direction (counterclockwise power). It is worth noting that, according to the arrangement disclosed above, by powering the external electrical connection 39 of one spool 24, both of its windings 38 are driven by current in the same direction (clockwise or counterclockwise).

[0049] As is well known to those skilled in the art, when spool 24 is powered in such a manner that current circulates within the spool, the spool generates a magnetic field perpendicular to the plane of the figures. More specifically, when spool 24 is powered clockwise, it generates a magnetic field that enters the plane of the figures due to the right-hand rule. Conversely, when spool 24 is powered counterclockwise, it generates a magnetic field that leaves the plane of the figures due to the right-hand rule.

[0050] Since each spool 24 is received between two adjacent magnetic plates 26, each spool 24 is immersed in the static magnetic field generated by the permanent magnets 28 and 30. When the spool 24 is not powered, it can be in a state of... Figure 5b The equilibrium position is shown. When the spool 24 is powered, for example, clockwise, it tends to move to a position where its own incoming magnetic field is aligned as closely as possible with the incoming magnetic field generated by the permanent magnet, for example, to a position where it moves towards the equilibrium position shown. Figure 5a The upper position is shown. Conversely, when spool 24 is powered in the opposite manner, i.e., counterclockwise, it tends to move to a position where its own exit magnetic field is aligned as closely as possible with the exit magnetic field generated by the permanent magnet. In the example, it moves to... Figure 5c The lower part is shown.

[0051] In this way, a technician can understand that the movement of the spools 24 can be controlled by means of electricity, with each spool being independent of the others. Specifically, the actuator assembly 20 of the present invention preferably includes a circuit for supplying power to each spool 24, wherein all circuits for supplying power to the spools 24 are controlled by an electronic control unit. In this way, the movement of each individual heald frame can be controlled to reproduce a predetermined weaving pattern.

[0052] Preferably, each linear actuator 32 includes a stop that is arranged to stop the movement of the spool 24 before any portion of the spool 24 travels above the upper permanent magnet 28 or below the lower permanent magnet 30.

[0053] Preferably, each spool 24 includes a connecting rod 40 extending along a height h. The connecting rod 40 of each spool 24 is intended to be mechanically connected to its respective heald frame in order to transmit movement of the spool 24 to the healds and warp threads.

[0054] Advantageously, all connecting rods 40 of all spools 24 extend in the same direction, for example, in the embodiment shown in the figures, all connecting rods 40 of all spools 24 extend upward.

[0055] As will be readily understood by those skilled in the art, this particular arrangement of the spool 24 allows for a significant reduction in the overall height of the actuator assembly 20 of the present invention relative to the height of corresponding actuator assemblies in the prior art. In this respect, Figure 1 and Figure 2 They can be compared, although Figure 1 and Figure 2 They are schematic drawings, but they are all drawn to the same scale.

[0056] During the operation of actuator assembly 20, a significant amount of heat is generated in the linear shaft 24, mostly due to Joule heating. Removing and dissipating this heat is necessary to maintain the temperature of permanent magnets 28 and 30 within their operating range. In fact, the characteristics of permanent magnets 28 and 30 are affected by temperature increases, and in some cases there is a threshold temperature above which the permanent magnets will eventually demagnetize.

[0057] In the prior art solution, the alternating arrangement of the spools 24 (half above the heddles and half below) means that the distribution density of the magnetic plates 26 and the spools 24 along depth d is relatively low. In other words, in known solutions that generate relatively low heat per unit volume, the distance between two adjacent magnetic plates 26 ensures that an open gap remains even with the spools 24 present, along which air flows freely. In the prior art solution, the spontaneously generated airflow due to convection is sufficient to remove heat and maintain the magnet at a suitable operating temperature.

[0058] Those skilled in the art will readily understand that the components of the actuator assembly 20 of the present invention are arranged at a very high density because all the spools 24 are arranged at the same height along a certain depth, which is less than or equal to the depth of similar actuator assemblies 20 in the prior art. Therefore, in the present invention, when the open gaps 42 in the actuator assembly 20 are very narrow, more heat is generated per unit volume (see...). Figure 8 This is why spontaneously generated airflow due to convection is insufficient to ensure proper cooling.

[0059] Therefore, the actuator assembly 20 of the present invention preferably includes a cooling circuit, as described below.

[0060] Preferably, the magnetic plate 26 includes a cooling channel 44 adapted to accommodate coolant circulation. Figure 6 An embodiment of the magnetic plate 26 is shown, wherein two cooling channels 44 are obtained in the frame structure 34 and extend primarily along the height h. In this embodiment, the cooling circuit also includes a manifold 46, which... Figure 7 As can be easily seen, the manifold 46 extends primarily along the depth d of the actuator assembly 20. The manifold 46 allows coolant to circulate in all cooling channels 44.

[0061] In addition, the cooling circuit includes other components (not shown) outside the actuator assembly 20. Preferably, the cooling circuit also includes a reservoir, a cooler, supply and return conduits, a circulation pump, and a control unit.

[0062] When the actuator assembly 20 includes a cooling circuit, it is preferable that the frame structure 34 of the magnetic plate 26 is made of a material that ensures good heat transfer. For example, the frame structure 34 may be made of a thermally conductive polymer, a thermally conductive composite material, or aluminum.

[0063] Preferably, each magnetic plate 26 of the present invention is arranged in a manner that maximizes the contact area between the permanent magnets 28, 30 and the frame structure 34. For example, the frame structure 34 may include two rectangular windows in which the permanent magnets 28, 30 are accommodated with slight interference in order to achieve actual contact along the entire periphery of the permanent magnets 28, 30. Alternatively or additionally, thermal paste or thermal adhesive may be used to thermally and mechanically connect the permanent magnets 28, 30 to their respective frame structures 34.

[0064] In this regard, as briefly provided above, the metal foil 36 can also assist in heat dissipation to avoid unwanted temperature spikes.

[0065] The shape and arrangement of the cooling channels 44 in each magnetic plate 26 must be limited in such a way as to optimize heat removal and avoid interfering with the operation of the linear actuator 32.

[0066] according to Figure 6 In the illustrated embodiment, cooling channels 44 of two adjacent magnetic plates 26 are arranged near the vertical section of the spool 24 included therebetween, where a significant amount of heat is generated. In this way, the coolant circulating in the cooling channels 44 allows heat to be removed efficiently before the temperatures of the permanent magnets 28, 30 are undesirably raised.

[0067] According to some embodiments, the cooling channel 44 has a shape designed to maximize its inner surface area in order to optimize heat exchange between the coolant and the walls of the cooling channel 44. For example, the cooling channel 44 may have a meandering shape.

[0068] In some embodiments, in addition to a liquid cooling circuit, actuator assembly 20 may also include a forced ventilation system (not shown in the figures). For example, a fan may be placed below actuator assembly 20 to generate a forced airflow that passes through open gap 42 to remove additional heat. The presence of forced ventilation is also advantageous for removing yarn and fiber debris that inevitably accumulates near the work area after prolonged operation of textile machine 22.

[0069] Proper heat dissipation allows for optimal performance in terms of the speed and frequency of the linear axis 24's movement.

[0070] Based on the foregoing, it can be understood that the spring is not essential for the proper operation of the actuator assembly 20 of the present invention. However, a spring may be added to meet specific needs, similar to what is done in prior art solutions.

[0071] However, a different solution is preferred instead of a spring. Preferably, the circuit for supplying power to each spool 24 includes a capacitor. The capacitor is adapted to form a temporary reservoir for the power to be supplied to the spool 24. Specifically, during steady-state operation (where the spool 24 moves continuously between a lower position and an upper position), the spool 24 passes through an equilibrium position ( Figure 5b When the spool 24 is temporarily stopped, for example, in the upper position (the position), the spool 24 has its maximum kinetic energy. ... Figure 5a When the spool 24 is moved to the lower position (where the kinetic energy is zero), the kinetic energy becomes zero. As the kinetic energy decreases, the capacitor is charged to form a storage device for energy in the form of electricity. Subsequently, when the spool 24 needs to move to the lower position (where the kinetic energy is zero), the kinetic energy becomes zero. Figure 5c When the spool 24 is in the equilibrium position, the capacitor distributes the collected energy to power the spool 24 and convert electrical energy into kinetic energy. In other words, the kinetic energy of the spool 24 reaches its maximum at the equilibrium position and is zero at the upper and lower positions, while the energy collected in the capacitor is zero at the equilibrium position and reaches its maximum at the upper and lower positions.

[0072] In this way, the capacitor performs a function similar to that in the spring, accumulating energy when the spool 24 moves away from the equilibrium position and returning the energy when the spool 24 moves back towards the equilibrium position. It should also be noted that, unlike the spring, each capacitor is only electrically connected to the corresponding spool 24, and therefore can be placed within the textile machine 22 with considerable design freedom. For this reason and their smaller size, using capacitors instead of springs allows for optimized obstruction of the actuator assembly 20 within the textile machine 22.

[0073] The presence of capacitors allows for a reduction in the amount of electrical energy that must be drawn from the grid to operate the linear actuator 32.

[0074] The foregoing description details the technical features that distinguish this invention from the solutions of the prior art. For all other features common to the prior art and this invention, refer to the introduction describing and commenting on the prior art.

[0075] Those skilled in the art will readily understand that the present invention allows for overcoming the disadvantages pointed out above regarding the prior art.

[0076] Specifically, the present invention provides an actuator assembly 20 for a textile machine 22, having an overall size smaller than that of known actuator assemblies. In particular, reducing the depth d of the actuator assembly 20 also allows for a reduction in the vertical stroke of the linear actuator 32 required to form the shuttle. Furthermore, the reduced vertical stroke allows for a reduction in the associated energy loss as heat.

[0077] Finally, the present invention provides an actuator assembly 20 for a textile machine 22 that further allows the above advantages while retaining the functionality of known solutions.

[0078] Obviously, the specific features described are for different embodiments of the invention and are intended to be exemplary and non-limiting. It will be apparent that those skilled in the art will be able to make further modifications and variations to the invention to meet specific or situational needs. For example, technical features described with respect to one embodiment of the invention can be inferred from that embodiment and applied to other embodiments of the invention. Such modifications and variations are in any case within the scope of protection of the invention as defined by the appended claims.

Claims

1. An actuator assembly (20) for a textile machine (22) having a width parallel to the main unfolding portion of the weft yarn of the textile being processed. w The depth of the main development section of the warp yarns parallel to the fabric being processed. d and height h ,in: The actuator assembly (20) includes components along the depth d Multiple distributions, i.e. n One, spools (24); The actuator assembly (20) includes components along the depth d Multiple distributions, i.e. n+1 One, magnetic plate (26); The magnetic plate (26) and the spool (24) are along the depth d Alternating, so that each spool (24) is received between two adjacent magnetic plates (26); Each magnetic plate (26) includes an upper permanent magnet (28) and a lower permanent magnet (30) with opposite orientations. The upper permanent magnets (28) of all magnetic plates (26) have the same orientation; The lower permanent magnets (30) of all magnetic plates (26) have the same orientation; Each spool (24) can move along the height between the upper and lower positions. h Move, and be able to move along the height between the lower position and the upper position. h The upper position is at least partially comprised between the upper permanent magnets (28) of two adjacent magnetic plates (26), and the lower position is at least partially comprised between the lower permanent magnets (30) of two adjacent magnetic plates (26); and Each spool (24) can be powered in two opposite ways.

2. The actuator assembly (20) according to claim 1, wherein, Each magnetic plate (26) includes a frame structure (34) in which the upper permanent magnet (28) and the lower permanent magnet (30) are mounted.

3. The actuator assembly (20) according to claim 2, wherein, The frame structure (34) includes two rectangular windows, in which the upper permanent magnet (28) and the lower permanent magnet (30) are accommodated with slight interference.

4. The actuator assembly (20) according to claim 2 or 3, wherein, The upper permanent magnet (28) and the lower permanent magnet (30) are thermally and mechanically connected to the corresponding frame structure (34) by thermal paste or thermal adhesive.

5. The actuator assembly (20) according to any one of claims 1 to 3, wherein, Each magnetic plate (26) includes two metal foils (36) covering the upper permanent magnet (28) and the lower permanent magnet (30).

6. The actuator assembly (20) according to any one of claims 1 to 3, wherein, Each spool (24) includes a connecting rod (40) along the height h It extends and is designed to be mechanically connected to the corresponding heald frame.

7. The actuator assembly (20) according to claim 6, wherein, All connecting rods (40) of all spools (24) extend in the same direction.

8. The actuator assembly (20) according to any one of claims 1 to 3 and 7, wherein, It also includes a cooling circuit, wherein the magnetic plate (26) includes a cooling channel (44) adapted to accommodate the circulation of coolant.

9. The actuator assembly (20) according to claim 8, wherein, Each spool (24) includes a main section along the height. h Two vertical sections are arranged, and in which, in two adjacent magnetic plates (26), the cooling channel (44) is arranged near the vertical section of the spool (24) included between the two adjacent magnetic plates (26).

10. The actuator assembly (20) according to any one of claims 1 to 3, 7 and 9 further includes a forced ventilation system.

11. The actuator assembly (20) according to any one of claims 1 to 3, 7 and 9, wherein, Each spool (24) includes at least one winding (38), the winding (38) comprising a wire forming a plurality of concentric and coplanar loops.

12. The actuator assembly (20) according to claim 11, wherein, The wire has a rectangular cross-section.

13. The actuator assembly (20) according to claim 11, wherein, Each spool (24) includes two windings (38) along the depth d They were placed close together.

14. The actuator assembly (20) according to claim 13, wherein, The two windings (38) are electrically connected to each other at their respective innermost loops, such that the outer electrical connection (39) can be located on opposite sides along the width of its periphery. w get.

15. The actuator assembly (20) according to any one of claims 1 to 3, 7, 9 and 12 to 14, comprising a power supply circuit for each spool (24), the power supply circuit comprising a capacitor.

16. The actuator assembly (20) according to any one of claims 1 to 3, 7, 9 and 12 to 14, comprising linear actuators (32), each linear actuator comprising one spool of the spools (24) and two magnetic plates (26) adjacent to the one spool, wherein each of the magnetic plates (26) is simultaneously part of both linear actuators (32).

17. The actuator assembly (20) according to any one of claims 1 to 3, 7, 9 and 12 to 14, wherein, Depth of each magnetic plate (26) d The depth including the corresponding upper permanent magnet (28) and the lower permanent magnet (30) d .

18. The actuator assembly (20) according to any one of claims 1 to 3, 7, 9 and 12 to 14, wherein, The magnetic fields generated by the upper permanent magnet (28) and the lower permanent magnet (30) are closed to each other outside the actuator assembly (20).

19. The actuator assembly (20) according to any one of claims 1 to 3, 7, 9 and 12 to 14, wherein, Each magnetic plate (26) has a main expansion portion in the plane xz and includes two metal foils (36) that extend parallel to the plane xz and cover the upper permanent magnet (28) and the lower permanent magnet (30).

20. A textile machine (22) comprising an actuator assembly (20) according to any one of claims 1 to 19.

21. The textile machine (22) according to claim 20, wherein, The textile machine (22) is a ribbon weaving machine.

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