• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:FR3017753A1
    申请号:FR1451245
    申请日:2014-02-17
    公开日:2015-08-21
    发明作者:Thierry Tollance；Pierre-Emmanuel Cavarec
    申请人:Somfy SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an electromechanical actuator comprising a motor with a motor stator provided with a profile adapted to cooperate with at least two rotors. , a home automation closure or sun protection system comprising such an actuator, a range of at least two such actuators and a method of manufacturing such an actuator.
    [0002] In general, the present invention relates to the field of occultation devices comprising a motorized drive device moving a screen between at least a first position and a second position. A motorized drive device comprises an electromechanical actuator of a movable closure, concealment or sun protection element such as a shutter, a door, a grating, a blind, or any other equivalent material, hereafter called screen. The screens fitted to the buildings have various dimensions and the choice of materials used has a considerable impact on the mass and inertia of the moving parts and, consequently, on the torque required for the operation of the latter. Manufacturers of actuators for the automatic operation of such screens are generally faced with the need to provide a range of actuators with different torque characteristics, dimensions or different power supplies, in order to be in adequacy with the characteristics of the screens or facilities including these screens. The invention relates in particular to so-called tubular actuators used in home automation installations. The motors generally used in this type of actuators are asynchronous motors, which can be powered directly from the AC mains. Other motors used are DC motors, with brushes and collectors, which are fed from the AC network by means of a continuous AC converter or directly from an energy storage device, such as 'a battery. Alternatively, electronically commutated brushless electric motors are regularly used in other applications, such as pumps, fans or electrical tools. Actuators comprising a motor are already known. The motor comprises a rotor and a stator positioned coaxially about an axis of rotation. The rotor comprises a rotor body provided with magnetic elements surrounded by the stator. Magnetic elements are pairs of poles. The stator is formed by a stator core comprising polar elements distributed on the periphery of the stator. The tubular actuators generally have an elongated casing for threading into a winding tube on which the screen winds to release access, such as for example a through door or a window. The motors included in such electric actuators are therefore designed to have a diameter that is restricted in relation to their length. To increase the torque produced by the actuator, it is known to provide a larger actuator diameter. The motor can thus have a larger output torque, which goes hand in hand with the increase in the winding diameter of the screen. To increase the torque produced by the actuator, it can also be provided a longer actuator length. The motor can thus have a larger output torque, which can possibly go hand in hand with the increase in the winding length of the screen.
    [0003] In this field of electric motors and actuators, it is known to use, depending on the torque to be delivered, engines of similar construction but whose diameters are different. However, these actuators have the disadvantage, depending on the torque to be delivered, not to include elements constituting the electric motor having a common construction of an actuator to another, such as the stator and the rotor. Consequently, this results in high development and industrialization costs for the actuator manufacturer, since each motor requires a specific design and industrial tool, thus increasing the unit price of the parts used, that is to say rotors and stators and more generally motors and actuators. In addition, it is known that, depending on the type of electric motor desired, that is to say a synchronous or asynchronous or DC motor, the components used for their manufacture, in particular the stators and rotors used, are different. Moreover, the change of the magnetic elements of the rotor of an electric motor requires modifying the construction of the rotor, the stator and the polar elements so as to maintain the electromagnetic behavior of the motor. The object of the present invention is to solve the aforementioned drawbacks and to propose an electromechanical actuator, a range of at least two actuators, as well as a method for manufacturing such an actuator, making it possible to standardize the construction of the components between several actuator references each comprising an electric motor delivering a specific torque, while minimizing the manufacturing costs of the motors of a range of actuators. For this purpose, the present invention aims, in a first aspect, an electromechanical actuator comprising an electric motor, the motor comprising a rotor and a stator coaxially positioned about an axis of rotation, the rotor comprising a rotor body provided with magnetic elements surrounded by the stator, these magnetic elements constituting pairs of poles, the stator being formed by a stator core comprising polar elements distributed on the outer periphery of the stator. According to the invention, the polar elements have an angular polar opening width smaller than the angular width of the magnetic elements of the rotor. Thus, an actuator comprising an electric motor provided with a stator in which the polar elements have an angular polar opening width smaller than the angular width of the magnetic elements of a first rotor is able to cooperate with this first rotor so as to deliver a first torque value. The stator is also able to cooperate with a second rotor, so as to deliver a second torque value, in particular a second torque value greater than the first torque value when the angular width of the magnetic elements of the second rotor is less than the angular width of the magnetic elements of the first rotor. In this way, an actuator comprising an electric motor provided with a stator having polar elements of a dimension smaller than the angular width of the magnetic elements of a first rotor, has a stator profile capable of cooperating with several rotors, of so that a manufacturer can produce at least two different electric motors comprising a stator having an identical profile, and wherein each electric motor delivers a different torque.
    [0004] Therefore, such a construction of an electric actuator motor can reduce the costs of development and industrialization of the actuators, using a common design and industrial tool, and reduce the manufacturing cost of the actuators of an actuator. range respectively comprising a common construction stator.
    [0005] Preferably, the angular polar opening width of the polar elements is at least two times smaller than the angular width of the magnetic elements of the first rotor. According to a preferred characteristic of the invention, the polar elements have an angular polar opening width defined by the following relationship: A <360 '4 4X pl where pl corresponds to the number of pairs of poles of the first rotor of the electric motor. In a preferred embodiment, a particular arrangement of the polar elements is adopted, according to which the number of pairs of poles of the first rotor is two, the polar opening width of the polar elements is in a range extending between 20 ° and 40 ° and the number of polar elements is six. Advantageously, the stator has a common multipurpose profile and an arrangement of polar elements configured to cooperate with different types of rotor.
    [0006] Advantageously, the stator core comprises magnetic short-circuit connectors connecting two polar elements to each other. The magnetic short circuits of the stator core correspond to mechanical connections between two polar elements. According to a preferred characteristic of the invention, the profile of the stator is configured to cooperate at least with the first rotor comprising a first number of pairs of poles and with a second rotor comprising a second number of pairs of poles, where the second number of The pairs of poles are different from the first number of pole pairs, and the polar polar opening width of the polar elements is configured to cooperate with the first rotor and the second rotor.
    [0007] Thus, the stator has a multipurpose profile, and this stator profile makes it possible to produce at least two electric motors, where each electric motor makes it possible to deliver a specific torque value, by means of a single polar element arrangement making it possible to guarantee satisfactory operation of each of the electric motors differentiated by the rotor associated with the stator having a common multi-purpose profile. Preferably, the electric motor is of the DC brushless direct current type. According to a second aspect, the invention relates to a home automation system for closing or solar protection which comprises a windable screen on a winding tube rotated by an electromechanical actuator as mentioned above. The present invention aims, according to a third aspect, a range of at least two actuators comprising: - a first actuator, the first actuator comprising a first electric motor, the first electric motor comprising a first rotor and a first stator positioned coaxially around an axis of rotation, the first rotor comprising a first rotor body provided with magnetic elements surrounded by the first stator, the first stator being formed by a stator core comprising polar elements distributed on the outer periphery of the first stator , and a second actuator, the second actuator comprising a second electric motor, the second electric motor comprising a second rotor and a second stator positioned coaxially about an axis of rotation, the second rotor comprising a second rotor body provided with magnetic elements surrounded by the second stator, the second stator is formed by a stator core comprising pole elements distributed on the outer periphery of the second stator, wherein the first and second stators of the first and second electric motors have a common multi-purpose profile configured to cooperate with at least the first rotor so as to delivering a first torque value and with the second rotor so as to output a second torque value, wherein the first torque value is less than the second torque value, and the polar elements have an angular polar opening width less than the angular width of the magnetic elements of the first rotor. Thus, a set of actuators respectively comprises an electric motor provided with a stator having a common multipurpose profile configured to cooperate on the one hand with a first rotor so as to deliver a first torque value and on the other hand with a second rotor so as to deliver a second torque value. In this way, first and second actuators respectively comprise an electric motor provided with a stator having the same profile so that a manufacturer can produce at least two different electric motors comprising a stator of similar construction, and where each electric motor deliver a different couple. Preferably, the polar elements have an angular polar opening width substantially equal to the angular width of the magnetic elements of a second rotor.
    [0008] Advantageously, at least a portion of the rotor body of the first rotor and at least a portion of the rotor body of the second rotor are made of a different material. In practice, the rotor body of the first rotor comprises ferrite magnetic elements, and the rotor body of the second rotor comprises magnetic elements made of neodymium boron iron. According to another preferred characteristic of the invention, the number of pairs of poles of the first rotor is smaller than the number of pairs of poles of the second rotor. Thus, the number of pairs of poles of each of the rotors is adapted according to the electric motor so as to guarantee satisfactory operation for all the motors of the range using a stator having a common multipurpose profile. According to another preferred characteristic of the invention, the size of the magnetic elements of the first rotor is greater than the size of the magnetic elements of the second rotor. Thus, in the case where the magnetic elements are powerful, in particular because of their material, the size of the magnetic elements is reduced so as to use the stator having the common multipurpose profile, without having to make any modifications to this profile. Advantageously, the magnetic elements are arranged on the outer circumference of the rotor body. The present invention aims, according to a fourth aspect, a method of manufacturing an electromechanical actuator, said actuator comprising an electric motor, the motor comprising a rotor and a stator coaxially positioned around an axis of rotation, the rotor comprising a rotor body provided with magnetic elements surrounded by the stator, said magnetic elements constituting pairs of poles, the stator being formed by a stator core comprising polar elements distributed on the outer periphery of the stator. According to the invention, said method comprises a step of assembling a stator with at least: either a first rotor, the stator of the motor having a common multi-purpose profile cooperating with the first rotor, or a second rotor, the multi-purpose common profile of the stator being configured to cooperate with the second rotor, wherein the pole elements have an angular polar opening width smaller than the angular width of the magnetic elements of the first rotor. This method of manufacturing an actuator has characteristics and advantages similar to those described above in relation to the actuator and the range of at least two actuators according to the invention. Other features and advantages of the invention will become apparent in the description below. In the accompanying drawings, given by way of nonlimiting examples: FIG. 1 is a diagrammatic sectional view of a home automation installation according to one embodiment of the invention; Figure 2 is a schematic perspective view of the home automation system of Figure 1; FIG. 3 is a diagrammatic representation of an actuator of the installation of FIGS. 1 and 2, this actuator comprising an electronically commutated DC brushless electric motor and being in accordance with one embodiment of the invention; Figure 4 is an axial section of the electric motor of the actuator of Figure 3; Figure 5 is a section along line V-V in Figure 4; and FIG. 6 is a cross-section similar to FIG. 5 of a second brushless dc-type electric motor with electronic commutation of a second actuator, this second motor comprising a second rotor.
    [0009] We will first describe, with reference to FIGS. 1 and 2, a home automation installation in accordance with the invention and installed in a building comprising an opening 1, window or door, equipped with a screen 2 belonging to a device. occultation 3, in particular a motorized roller shutter. The concealment device 3 may be a rolling shutter, a fabric blind or with adjustable blades, or a rolling gate. Of course, the present invention applies to all types of occulting device. With reference to FIGS. 1 and 2, a shutter according to one embodiment of the invention will be described. The screen 2 of the occulting device 3 is wound on a winding tube 4 driven by a motorized drive device 5 and movable between a wound position, particularly high, and a unwound position, particularly low. In known manner, a shutter 3 comprises an apron comprising horizontal blades articulated to each other, forming the screen 2 of the shutter 3, and guided by two lateral rails 6. These blades are contiguous when the apron 2 of the shutter 3 reaches its low position unrolled.
    [0010] In the case of a shutter, the wound up position corresponds to the support of a final L-shaped end plate 8 of the deck 2 of the shutter 3 against an edge of a box 9 of the shutter 3, and the low position unrolled corresponds to the support of the final end blade 8 of the deck 2 of the shutter 3 against a threshold 7 of the opening 1. The first blade of the shutter 3, opposite to the blade end, is connected to the winding tube 4 by means of at least one joint 10. The winding tube 4 is disposed inside the trunk 9 of the shutter 3. The apron 2 of the shutter 3 s it winds and unwinds around the winding tube 4 and is housed at least partly inside the trunk 9. The motorized drive device 5 is controlled by a not shown control unit. The control unit may be for example a local control unit, where the local control unit can be connected in a wired or non-wired connection with a central control unit. The central control unit controls the local control unit, as well as other similar local control units distributed throughout the building. The central control unit can be in communication with a remote weather station outside the building, including in particular one or more sensors that can be configured to determine for example a temperature, a brightness, or a wind speed. A remote control, not shown and provided with a control keyboard, which includes selection and display means, further allows a user to intervene on the local control unit and / or the central control unit . The motorized drive device 5 and the local control unit are preferably configured to execute the unwinding or winding commands of the screen 2 of the occulting device 3, which can be acquired in particular by the remote control. The motorized drive device 5 comprises an electromechanical actuator 11, in particular of the tubular type, making it possible to rotate the winding tube 4 so as to unroll or wind up the screen 2 of the concealment device 3. occultation 3 comprises the winding tube 4 for winding the screen 2, where, in the mounted state, the electromechanical actuator 11 is inserted into the winding tube 4. The electromechanical actuator 11 comprises an electric motor, a torque support, and further including a gear reduction device and an output shaft. The electromechanical actuator 11 also comprises a housing 31, preferably of cylindrical shape. We will now describe, with reference to FIGS. 3 to 5, an electromechanical actuator according to the invention. In Figure 3, an actuator 11 is shown, this actuator being part of a range of actuators. The actuators 11 of the range are supplied with electrical energy by the power supply network of the sector represented by the phase P and neutral N wires. They make it possible to move the screen 2 of a concealment device 3.
    [0011] The movable screen 2 of the concealment device 3 is a closure, concealment and / or sun protection screen, winding on the winding tube 4 whose inner diameter is substantially equivalent to the outer diameter of the actuator 11, so that the actuator 11 can be inserted into the winding tube 4 during assembly of the occulting device 3.
    [0012] In another embodiment, the actuator 11 is intended to be placed in a U-shaped profile rail. The actuator 11 comprises an electric motor 12. The motor 12 comprises a rotor 13 and a stator 14 positioned coaxially around the An axis of rotation X. The rotor 13 comprises a rotor body 15 provided with magnetic elements 16 surrounded by the stator 14. The magnetic elements 16 constitute pairs of poles. Advantageously, the magnetic elements 16 are arranged on the outer circumference of the rotor body 15. The magnetic elements 16 of the rotor 13 constitute a permanent magnet. Thus, the permanent magnet formed by the magnetic elements 16 surrounds the body of the rotor 15. The permanent magnet is separated from the stator 14 by an air gap 25, radial with respect to the axis of rotation X. The magnetic elements 16 separate constituent the permanent magnet can be reported on the outer circumference of the rotor body 15 by gluing, overmolding or any other known technique. The stator 14 is formed by a stator core 17 comprising polar elements 28 distributed on the periphery of the stator 14, preferably on the outer periphery of the stator 14. The rotor body 15 is integrally connected in rotation to a rotor shaft 24. The rotor shaft 24 is centered on the axis of rotation X and protrudes on either side of the rotor body 15. Thus, the rotor shaft 24 comprises a first and a second end 24a, 24b projecting from relative to the rotor body 15.
    [0013] The electric motor 12 of the actuator range 11 is of the brushless dc type with electronic commutation. Each actuator 11 in the range comprises a continuous alternating converter 19. The continuous AC converter 19 has the same electronic structure for all the actuators 11 of the range, the sizing of certain components being different from one actuator 11 to the other. In one embodiment, the continuous AC converter 19 is of the switching type, according to the PWM (Pulse Width Modulation) technique.
    [0014] In another embodiment, the continuous AC converter 19 is of transformer and rectifier type. The continuous AC converter 19 comprises a rectifier 20 of the mains voltage, a capacitor 21, a transistor 22 and a control circuit 23, which are adapted to the power range that can be delivered by the motor 12.
    [0015] For each actuator 11 in the range, the mains voltage is rectified by the rectifier 20 and is used to charge the capacitor 21 disposed between the output terminals of the continuous AC converter 19. The capacitor 21 is controlled by the transistor 22, itself controlled by the control circuit 23.
    [0016] Advantageously, the rotor body 15 is formed from a sheet stack. In another embodiment, the rotor body 15 is made of a solid shaft. The stator 14 defines a cylindrical inner space E with a circular section in which the rotor 13, including in particular the elements 16, is positioned and inside which the rotor 13 is rotated when the motor 12 operates. The diameter D1 of the cylindrical space E is such that this space E receives the rotor 13 as well as the magnetic elements 16. The magnetic or magnetized part of the rotor 13 located inside the cylindrical space E inside the stator 14 , the rotor 13 is called internal rotor.
    [0017] The cylindrical space E also receives a first bearing 26 and a second bearing 27 for rotating support of the rotor shaft 24. Thus, the rotor shaft 24 is rotatably mounted at its two ends 24a and 24b by through the two bearings 26, 27.
    [0018] Here, the first end 24a of the rotor shaft 24 is in contact with the first bearing 26, while the second end 24b of the rotor shaft 24 is in contact with the second bearing 27. In one embodiment, at least one of the bearings 26, 27 is a ball bearing. The first and second bearings 26, 27 are thus positioned on either side of the rotor body 15 along the axis of rotation X. In another embodiment, the motor 12 comprises a single bearing supporting the rotor shaft. 24.
    [0019] A central core is here formed by the stator core 17 belonging to the stator 14. The stator core 17 is made of magnetizable material and more specifically of ferromagnetic material. It is generally formed by a stack of sheets and provided with insulating fittings. The stator core 17 comprises polar elements 28 distributed over the outer periphery of the stator 14. The polar elements 28 of the core 17 project outwardly from the electric motor 12. Windings 29 are positioned around the polar elements 28 of the magnet. stator 14. More specifically, each polar element 28 is surrounded by a winding 29 which is specific to it. The coils 29 are connected so that when they are traversed by a current, they produce a rotating magnetic field which rotates the rotor 13. The coils 29 are isolated from the stator core 17. The stator 14 comprises, on its circumference A cylinder head 30 surrounds the stator 14, that is to say the central core 17, which is adapted to receive it, and is centered on the axis of rotation X. This cylinder head 30 allows the circulation magnetic flux. The angular polar opening width of a polar element 28 of the stator 14 is defined as the angle at the apex of an angular sector centered on the axis of rotation X and delimited by two straight lines passing respectively through the two ends of a part of this element which defines the gap 25, this angle being defined in a plane radial to the axis X and containing this polar element 28. This angular polar opening width is sometimes called "polar expansion". The angular width a of a magnetic element 16 of the rotor 13 is defined as the angle at the apex of an angular sector of minimum area, centered on the axis of rotation X in radial section of the motor 12 and which includes this element. magnetic 16.
    [0020] As illustrated in FIG. 5, the polar elements 28 have an angular polar opening width A less than the angular width al of the magnetic elements 16 of the first rotor 13 which belongs to the motor 12. Thus, an actuator 11 comprising an electric motor 12 provided with a stator 14 whose polar elements 28 have an angular polar opening width A smaller than the angular width al of the magnetic elements 16 of a first rotor 13 is adapted to cooperate with at least with a first rotor 13 so delivering a first torque value. As can be seen in FIG. 6, this stator 14 is also able to cooperate with a second rotor 13, so as to deliver a second torque value, whereas the first torque value is less than the second torque value and the width angular al magnetic elements 16 of the first rotor 13 is greater than the angular width a2 of the magnetic elements 16 of the second rotor 13. In this way, an actuator 11 comprising an electric motor 12 provided with a stator 14 having polar elements 28 d An angular polar opening width A smaller than the angular width al of the magnetic elements of a first rotor, has a stator profile 14 adapted to cooperate with a plurality of rotors 13, so that a manufacturer can produce at least two different electric motors 12 comprising a stator 14 having an identical profile, and wherein each electric motor 12 delivers a different torque. Consequently, such a construction of an electric motor 12 of actuator 11 makes it possible to reduce the development and industrialization costs of the actuators 11, by using a common design and industrial tool, and to reduce the manufacturing cost of the actuators. 11 of a range respectively comprising a stator 14 of common construction. Preferably, the angular polar opening width A of the polar elements 28 is at least two times smaller than the angular width al of the magnetic elements 16 of the first rotor 13. By way of non-limiting example, as illustrated in FIG. 5, the angular polar opening width A of the polar elements 28 is of the order of 24 ° and the angular width of the magnetic elements 16 of the first rotor 13 is of the order of 85 °. In addition, the polar elements 28 have an angular polar opening width A substantially equal to the angular width a2 of the magnetic elements 16 of the second rotor 13.
    [0021] By way of non-limiting example, and as illustrated in FIG. 6, the angular polar opening width A of the polar elements 28 is of the order of 24 ° and the angular width a2 of the magnetic elements 16 of the first rotor 13 is of the order of 22 °. In one embodiment, the pole elements 28 have an angular polar opening width A defined by the following relation: 360 'A <4 X p1, where p1 is the number of pole pairs of the first rotor 13 of the electric motor 12 Here, and as illustrated in FIG. 5, the number of pole pairs of the first rotor 13 is two.
    [0022] In the embodiment as illustrated in FIGS. 5 and 6, the angular polar opening width A of polar elements 28 is in the range of 20 ° to 40 °, and the number of polar elements 28 is six. Preferably, the angular polar opening width A of the polar elements 28 is of the order of 30 °.
    [0023] Advantageously, the stator 14 has a common multipurpose profile and an arrangement of the polar elements 28 configured to cooperate with different types of rotor 13. Thus, an actuator 11 comprising an electric motor 12 provided with a stator 14, where the stator 14 has a common multipurpose profile, is adapted to cooperate with at least one first rotor 13, so as to deliver a first torque value, and with a second rotor 13, so as to deliver a second torque value, in particular where the first torque value is lower than the second torque value. Advantageously, the stator core 17 comprises magnetic short-circuit connectors 18 connecting two polar elements 28 to each other. The magnetic short circuits 18 of the stator core 17 correspond to mechanical links between two polar elements 28. The magnetic short circuits 18 of the stator core 17 channel a portion of the magnetic flux generated by the electric motor 12 inside the stator core 17. Thus, the magnetic short circuits 18 of the stator core 17 limit the magnetic flux passing through the coils 29 positioned around the pole elements 28. Preferably, the profile of the stator 14 is configured to cooperate at least with the first rotor 13 comprising a first number of pole pairs and with a second rotor 13 comprising a second number of pole pairs, wherein the second number of pole pairs is different from the first number of pole pairs and the angular polar opening width. A polar element 28 is configured to cooperate with the first rotor 13 and the second rotor 13. Thus, the stator 14 p a common multipurpose profile is presented, and this stator profile 14 makes it possible to produce a range of at least two electric motors 12, in which each electric motor 12 makes it possible to deliver a specific torque value, by means of a single arrangement of the polar elements 28 to ensure satisfactory operation of each of the electric motors 12 differentiated by the rotor 13 associated with the stator 14 having a common multipurpose profile. The profile of the stator 14 of the electric motor 12 corresponds to the section, in other words to the geometric shape, of the stator 14 defined by a sectional plane VV orthogonal to the axis of rotation X of the stator 14, like those of FIGS. 5 and 6. A stator 14 of an electric motor 12 having a profile common to a range of actuators 11 may have a different stator length 14 depending on the motors. The length of the stator 14 is in no way limiting. The stator 14 can thus be of identical or different length, for each of the actuators 11 of a range. Here, the first rotor 13 and the second rotor 13 are internal rotors, that is to say rotors 13 disposed within the stator 14 having a common multi-purpose profile. In this embodiment, the first rotor 13 and the second rotor 13 are non-wound rotors. In particular, the coils 29 are positioned around the pole elements 28 of the stator 14 having a common multipurpose profile. An electric motor stator 14 having a profile common to a range of actuators 11 may have coils 29 having a different number of turns for each actuator. Here, the number of turns of the coils 29 is in no way limiting. The coils 29 may thus comprise a number of turns, identical or different for each of the actuators 11 of a range. In a particular embodiment, the stator 14 of the motor 12 is a multipurpose common stator, the stator 14 being configured to cooperate at least with a first rotor 13 so as to deliver a first torque value and with a second rotor 13 so as to output a second torque value, wherein the first torque value is less than the second torque value. Thus, an actuator 11 comprises an electric motor 12 provided with a common multipurpose stator 14 and configured to cooperate on the one hand with a first rotor 13 so as to deliver a first torque value and on the other hand with a second rotor 13 so as to deliver a second torque value. In this way, a first and a second actuator 11 respectively comprise an electric motor 12 provided with the same stator 14 so that a manufacturer can produce at least two different electric motors 12 comprising an identical stator 14, and where each electric motor 12 delivers a different couple. Consequently, such an electric motor 12 of actuator 11 makes it possible to reduce the manufacturing costs of the actuators 11 and to reduce the number of engine references 12 and actuators 11 for the manufacturer. In such a case, the coils 29 positioned around the pole elements 28 of the stator 14 may be identical for a range of actuators 11. In addition, the length of the stator 14 is identical for a range of actuators 11. Advantageously, at least a part of the rotor body 15 of the first rotor 13 and at least a part of the rotor body 15 of the second rotor 13 are made of a different material.
    [0024] Thus, the change of material for the rotor body 15 of the first and second rotors 13 makes it possible to modify the torque value delivered by an electric motor 12, so as to reduce the cost of the various references of actuators 11 by using a stator 14. having a common multipurpose profile. In this way, the change of material for the rotor body 15 of the first and second rotors 13 can make it possible to optimize the cost of an electric motor 12 by using a more or less expensive material making it possible to obtain a desired torque value. for an actuator reference 11. In addition, the change of material for the rotor body 15 of the first and second rotor types 13 can be used to supply an actuator manufacturer in the event that one of the materials is in contact with the rotor. break. In practice, the rotor body 15 of the first rotor 13 comprises magnetic elements 16 made of ferrite, and the rotor body 15 of the second rotor 13 comprises magnetic elements 16 made of neodymium boron iron. Thus, a first actuator 11, as illustrated in FIG. 5, comprising a first electric motor 12, where the first electric motor 12 comprises a first stator 14 having a common multi-purpose profile and a first rotor 13, and where the The rotor body 15 of the first rotor 13 comprises ferrite magnetic elements 16, which provides a low torque. And a second actuator 11, as shown in FIG. 6, comprising a second electric motor 12, where the second electric motor 12 comprises a second stator 14 having the common multipurpose profile and a second rotor 13, and where the body rotor 15 of the second rotor 13 comprises magnetic elements 16 in neodymium boron iron, delivers a high torque. In this way, a range of actuators 11 comprising electric motors 12 provided respectively with a stator 14 having a common multipurpose profile makes it possible to propose different torque values for each of the actuators 11 while minimizing the cost of obtaining them. In addition, the second actuator 11 may be of identical length to the first actuator 11 and can deliver a higher torque, and possibly achieve a better performance.
    [0025] The stator 14 having a common multi-purpose profile comprises an arrangement of the pole elements 28 configured to cooperate with the first rotor 13 and with the second rotor 13. Thus, the stator 14 having a common multipurpose profile makes it possible to produce at least two electric motors 12, where each electric motor 12 is differentiated by the delivered torque, by means of a single arrangement of the polar elements 28 to ensure satisfactory operation of each of the electric motors 12 differentiated by the rotor 13 associated with the stator 14. In addition, the pole elements 28 of the stator 14 having a common multipurpose profile are dimensioned so as to guarantee satisfactory operation for all the motors 12 of the range using the same stator profile 14. The sizing of the polar elements 28 of the stator 14 having a common multi-purpose profile is to define the width of the polar opening The dimensioning of the polar elements 28 of the stator 14 having a common multipurpose profile also consists in defining the number of polar elements 28. In one embodiment, it is possible to define the number of polar elements 28. at least one parameter relating to the magnetic elements 16 of the first rotor 13 and the second rotor 13 is different. Thus, at least one parameter relating to the magnetic elements 16 of each of the rotors 13 is adapted as a function of the electric motor 12, so as to guarantee satisfactory operation for all the motors 12 of the range using the same stator profile 14. This at least one parameter may be in particular the material of the magnetic elements 16 of each of the rotors 13, the number of magnetic elements 16 of each of the rotors 13, the size of the magnetic elements 16 of each of the rotors 13 or the assembly method magnetic elements 16 with the rotor body 15 of each of the rotors 13. Advantageously, the number of pole pairs of the first rotor 13 is less than the number of pairs of poles of the second rotor 13. Thus, the number of pairs of poles of each of the rotors 13 is adapted according to the electric motor 12, so as to guarantee satisfactory operation for all the motors 12 of the range using a stator 14 having a common multipurpose profile. In addition, the number of pairs of poles of each of the rotors 13 is adapted according to the material of the magnetic elements 16. In this way, in the case where the magnetic elements 16 are powerful because of their material, in particular the elements In the case of ferrite magnets 16, the number of pole pairs of the rotor 13 is increased so as to use the stator 14 having a common multipurpose profile, without having to make modifications to this profile. . Advantageously, the size of the magnetic elements 16 of the first rotor 13 is greater than the size of the magnetic elements 16 of the second rotor 13. Thus, in the case where the magnetic elements 16 are powerful, in particular because of their material, in particular the elements The magnetic element 16 neodymium iron boron relative to the ferrite magnetic elements 16, the size of the magnetic elements 16 is reduced, so as to use the stator 14 having the common multi-purpose profile, without having to make changes to this profile. Advantageously, the number of pairs of poles of the rotor 13 is defined so as to guarantee the generation of a magnetic flux by the electric motor 12 making it possible to saturate the magnetic short circuits 18 of the stator core 17. In one embodiment, two electric motors 12 of actuators 11 belonging to a range comprising a stator 14 having a common multipurpose profile are defined by the following relations: Br2 Br1 Br2 (p2 + 1) <pi <p2 (relation 1) where BO corresponds to magnetic field of the magnetic elements 16 of a first rotor 13 of a first electric motor 12, Br2 corresponds to the magnetic field of the magnetic elements 16 of a second rotor 13 of a second electric motor 12, p1 to the number of pairs of poles the first rotor 13 of the first electric motor 12, and p2 the number of pairs of poles of the second rotor 13 of the second electric motor; and 360 'A z X p2 where A is the width of the polar angular aperture. Relation 1 makes it possible to guarantee satisfactory operation for all the motors 12 of the range using a stator 14 having a common multipurpose profile, in particular to maintain a suitable magnetic flux density, by the use of a number Pairs of whole poles for the first and second rotors 13. The relation 2 makes it possible to determine an angular polar opening width A smaller than the narrowest angular width a1, a2 of the magnetic elements 16 of the first and second rotors. By way of non-limiting example, and as illustrated in FIGS. 5 and 6, the range of electric motors 12 that can be implemented with a stator 14 having a common multipurpose profile may comprise a first electric motor 12 comprising a first rotor 13 provided with four ferrite magnetic elements 16, therefore two pairs of poles, and a second electric motor 12 comprising a second roto R 13 provided with eight magnetic elements 16 neodymium boron iron, therefore four pairs of poles. The magnetic field of the magnetic elements 16 of the first rotor 13 of the first electric motor 12 is of the order of 0.5 Tesla. The magnetic field of the magnetic elements 16 of the second rotor 13 of the second electric motor 12 is of the order of 1 Tesla. Here and as illustrated in Figures 5 and 6, the stator 14 having a common multi-purpose profile cooperating with the first and second rotors 13 comprises a number of polar elements 28 equal to six. In this example, the optimum angular polar opening width A for the first rotor 13 provided with four ferrite magnetic elements 16 is in a range between 30 ° and 55 °, and preferably of the order of 50 °. The optimum angular polar opening width A for the second rotor 13 provided with eight magnetic elements 16 in neodymium boron iron is in a range between 20 ° and 30 °, and preferably of the order of 25 °.
    [0026] From these optimum ranges of the angular polar opening width A respectively for the first and second rotors 13, the permissible operating range of the angular polar opening width A for a stator 14 having a common multipurpose profile with the first and second rotors 13 is between 20 ° and 40 °. 18 (relation 2) The choice of an angular polar opening width A polar elements 28 during the definition of the stator 14 having a common multipurpose profile less than 40 °, in particular of the order of 24 °, generates a relative operation, in other words suboptimal operation, for the first rotor 13 having four ferrite magnetic elements 16.
    [0027] Such an angular polar opening width A thus generates a loss of a portion of the magnetic flux generated by the magnetic circuit of the first electric motor 12 comprising the first rotor 13 provided with four ferrite magnetic elements 16. However, such a permissible operating range of the angular polar opening width A guarantees the compatibility of the stator 14 having a common multipurpose profile with the first and second rotors 13 respectively having ferrite and neodymium ferron magnetic elements 16 . Furthermore, the choice of an angular polar opening width A polar elements 28 when defining the stator 14 having a common multi-purpose profile of the order of 25 ° ensures optimal operation for the second rotor 13 having eight magnetic elements 16 neodymium iron boron. And an angular polar opening width A of the polar elements 28 of the order of 45 ° can not be retained during the definition of stator 14 having a common multi-purpose profile since the second rotor 13 provided with eight magnetic elements 16 in neodymium iron boron would be non-functional if such a value were retained.
    [0028] The present invention thus applies to a range of at least two actuators 11 comprising: a first actuator 11, the first actuator 11 comprising a first electric motor 12, the first electric motor 12 comprising a first rotor 13 and a first stator 14 positioned coaxially around an axis of rotation X, the first rotor 13 comprising a first rotor body 15 provided with magnetic elements 16 surrounded by the first stator 14, the first stator 14 being formed by a stator core 17 comprising polar elements 28 distributed on the outer periphery of the first stator 14, and a second actuator 11, the second actuator 11 comprising a second electric motor 12, the second electric motor 12 comprising a second rotor 13 and a second stator 14 positioned coaxially around an axis of rotation X, the second rotor 13 comprising a second rotor body 15 provided with magnetic elements 16 surrounded by the second stator 14, the second stator 14 being formed by a stator core 17 comprising polar elements 28 distributed on the outer periphery of the second stator 14, where the first and second stators 14 of the first and second electric motors 12 have a multipurpose common profile configured to cooperate at least with the first rotor 13, so as to deliver a first torque value, and with the second rotor 13, so as to deliver a second torque value, where the first torque value is less than the second torque value, and wherein the polar elements 28 have an angular polar opening width A smaller than the angular width al of the magnetic elements 16 of the first rotor 13. A method of manufacturing a first embodiment will now be described. electromechanical actuator according to an embodiment of the invention.
    [0029] The assembly method comprises a step of assembling a stator 14 with at least: either a first rotor 13, the stator 14 of the motor 12 having a common multipurpose profile cooperating with the first rotor 13, or a second rotor 13, the common multi-purpose profile of the stator 14 being configured to cooperate with the second rotor 13, where the pole elements 28 have an angular polar opening width A smaller than the angular width al of the magnetic elements 16 of the first rotor 13. Thus, during the manufacture of an electric motor 12 of an actuator 11, a stator 14 having a common multipurpose profile is assembled with either a first rotor 13 or with a second rotor 13 depending on the torque value that the motor Electric 12 to produce must deliver. The fact of using a common multi-purpose stator profile 14 for a range of actuators 11 comprising electric motors 12 provided with different rotors and delivering different torque values makes it possible to reduce the development and industrialization costs of the actuators 11 and further extending a range of actuators 11. The use of the same stator profile 14 for a range of actuators 11 makes it possible to meet the need for applications requiring different motors that can deliver different torque values, in particular to motorization applications shutters or doors of different size and / or weight.
    [0030] Of course, many modifications can be made to the embodiments described above without departing from the scope of the invention.
    权利要求:
    Claims (18)
    [0001]
    REVENDICATIONS1. An electromechanical actuator (11) comprising an electric motor (12), the motor (12) comprising a rotor (13) and a stator (14) coaxially positioned about an axis of rotation (X), the rotor (13) comprising a rotor body (15) provided with magnetic elements (16) surrounded by the stator (14), said magnetic elements (16) constituting pairs of poles, the stator (14) being formed by a stator core (17). ) comprising polar elements (28) distributed on the periphery of the stator (14), characterized in that the pole elements (28) have an angular polar opening width (A) smaller than the angular width (a1) of the magnetic elements (16) of the rotor (13).
    [0002]
    Electromechanical actuator (11) according to claim 1, characterized in that the angular polar opening width (A) of the pole elements (28) is at least two times smaller than the angular width (a1) of the magnetic elements ( 16) of the rotor (13).
    [0003]
    Electromechanical actuator (11) according to Claim 1 or Claim 2, characterized in that the polar elements (28) have an angular polar opening width (A) defined by the following relation: 3600 Δ <4> <pl where p1 is the number of pole pairs of the rotor (13) of the electric motor (12).
    [0004]
    4. Electromechanical actuator (11) according to claim 3, characterized in that the number of pole pairs of the rotor (13) is two.
    [0005]
    Electromechanical actuator (11) according to one of Claims 1 to 4, characterized in that the angular polar opening width (A) of the pole elements (28) is in a range of between 20 ° and 20 °. 40 °, and in that the number of polar elements (28) is six.
    [0006]
    Electromechanical actuator (11) according to any one of claims 1 to 5, characterized in that the stator (14) has a common multi-purpose profile and an arrangement of the pole elements (28) configured to cooperate with different types of rotor (13).
    [0007]
    7. electromechanical actuator (11) according to any one of claims 1 to 6, characterized in that the stator core (17) comprises connectors (18) of magnetic short-circuit connecting two polar elements (28) between them.
    [0008]
    8. Electromechanical actuator (11) according to any one of claims 1 to 7, characterized in that: - the profile of the stator (14) is configured to cooperate at least with a first rotor (13) comprising a first number of pairs of poles and with a second rotor (13) comprising a second number of pole pairs, - where the second number of pole pairs is different from the first number of pole pairs, and - where the angular polar opening width (A ) polar elements (28) is configured to cooperate with the first rotor (13) and the second rotor (13).
    [0009]
    9. Electromechanical actuator (11) according to any one of claims 1 to 8, characterized in that said electric motor (12) is of DC brushless DC type.
    [0010]
    10. Home automation closure or sun protection system comprising a screen (2) windable on a winding tube (4) rotated by an electromechanical actuator (11), characterized in that the actuator is according to one of the preceding claims.
    [0011]
    11. A range of at least two actuators (11) comprising: - a first actuator (11), the first actuator (11) comprising a first electric motor (12), the first electric motor (12) comprising a first rotor (13); ) and a first stator (14) positioned coaxially about an axis of rotation (X), the first rotor (13) comprising a first rotor body (15) provided with magnetic elements (16) surrounded by the first stator (14), the first stator (14) being formed by a stator core (17) comprising pole elements (28) distributed over the outer periphery of the first stator (14), and - a second actuator (11), the second actuator (11) comprising a second electric motor (12), the second electric motor (12) comprising a second rotor (13) and a second stator (14) positioned coaxially about an axis of rotation (X), the second rotor (13) comprising a second rotor body (15) provided with magnets electrodes (16) surrounded by the second stator (14), the second stator (14) being formed by a stator core (17) comprising polar elements (28) distributed on the outer periphery of the second stator (14), - where the first and second stators (14) of the first and second electric motors (12) have a common multipurpose profile configured to cooperate with at least the first rotor (13) to provide a first torque value and with the second rotor ( 13) so as to output a second torque value, - where the first torque value is less than the second torque value, and - where the polar elements (28) have an angular polar opening width (A) less than the angular width (a1) of the magnetic elements (16) of the first rotor (13).
    [0012]
    12. Range of at least two actuators (11) according to claim 11, characterized in that the pole elements (28) have an angular polar opening width (A) substantially equal to the angular width (a2) of the magnetic elements. (16) of the second rotor (13).
    [0013]
    13. Range of at least two actuators (11) according to any one of claims 11 and 12, characterized in that at least a portion of the rotor body (15) of the first rotor (13) and at least a portion the rotor body (15) of the second rotor (13) is made of a different material.
    [0014]
    A range of at least two actuators (11) according to claim 13, characterized in that the rotor body (15) of the first rotor (13) comprises ferrite magnetic elements (16), and in that the body rotor (15) of the second rotor (13) comprises magnetic elements (16) of neodymium boron iron.
    [0015]
    15. Range of at least two actuators (11) according to any one of claims 11 to 14, characterized in that the number of pairs of poles of the first rotor (13) is less than the number of pairs of poles of the second rotor (13).
    [0016]
    16. Range of at least two actuators (11) according to any one of claims 11 to 15, characterized in that the size of the magnetic elements (16) of the first rotor (13) is greater than the size of the magnetic elements ( 16) of the second rotor (13).
    [0017]
    17. Range of at least two actuators (11) according to any one of claims 11 to 16, characterized in that the magnetic elements (16) are arranged on the outer circumference of the rotor body (15).
    [0018]
    18. A method of manufacturing an electromechanical actuator (11), said actuator (11) comprising an electric motor (12), the motor (12) comprising a rotor (13) and unstator (14) coaxially positioned around an axis of rotation (X), the rotor (13) comprising a rotor body (15) provided with magnetic elements (16) surrounded by the stator (14), said magnetic elements (16) constituting pairs of poles, the stator (14) being formed by a stator core (17) comprising pole elements (28) distributed on the periphery of the stator (14), characterized in that said method comprises a step of assembling a stator (14) with at least: - either a first rotor (13), the stator (14) of the motor (12) having a common multipurpose profile cooperating with the first rotor (13), - or a second rotor (13), the profile multipurpose common stator (14) being configured to cooperate with the second rotor (13), - where Polar ents (28) have an angular polar opening width (A) smaller than the angular width (a1) of the magnetic elements (16) of the first rotor (13).
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP2908412A2|2015-08-19|
    CN104852483A|2015-08-19|
    FR3017753B1|2017-08-25|
    PL2908412T3|2020-09-07|
    EP2908412A3|2016-06-15|
    EP2908412B1|2020-03-18|
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    法律状态:
    2016-02-03| PLFP| Fee payment|Year of fee payment: 3 |
    2017-02-07| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-06| PLFP| Fee payment|Year of fee payment: 5 |
    2020-02-21| PLFP| Fee payment|Year of fee payment: 7 |
    2021-02-22| PLFP| Fee payment|Year of fee payment: 8 |
    2021-03-05| CJ| Change in legal form|Effective date: 20210126 |
    2021-03-05| CD| Change of name or company name|Owner name: SOMFY ACTIVITES SA, FR Effective date: 20210126 |
    2022-02-23| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451245A|FR3017753B1|2014-02-17|2014-02-17|ELECTROMECHANICAL ACTUATOR COMPRISING AN ELECTRIC MOTOR, INSTALLATION COMPRISING SUCH ACTUATOR, RANGE OF ACTUATORS AND METHOD OF MANUFACTURING THE SAME|FR1451245A| FR3017753B1|2014-02-17|2014-02-17|ELECTROMECHANICAL ACTUATOR COMPRISING AN ELECTRIC MOTOR, INSTALLATION COMPRISING SUCH ACTUATOR, RANGE OF ACTUATORS AND METHOD OF MANUFACTURING THE SAME|
    EP15155163.7A| EP2908412B1|2014-02-17|2015-02-16|Electromechanical actuator comprising an electric motor, installation comprising such an actuator, range of actuators and related manufacturing method|
    PL15155163T| PL2908412T3|2014-02-17|2015-02-16|Electromechanical actuator comprising an electric motor, installation comprising such an actuator, range of actuators and related manufacturing method|
    CN201510085328.2A| CN104852483A|2014-02-17|2015-02-17|Electromechanical actuator comprising an electric motor, installation comprising such an actuator, range of actuators and related manufacturing method|
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