• 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:
    The invention relates, in its most general sense, to an electric actuator formed of a polyphase brushless motor comprising a rotor (27) provided with permanent magnets (29 to 38) and integral with an output shaft (26), and a stator (1) carrying coils (2) and providing the magnetic drive of the rotor (27), a first electrical connection assembly (6) supplying the coils (2), said stator (1) being integrated in a stator module (9) formed of a material coating the stator (1) wound and the first (6) electrical connection assembly characterized in that the rotor (27) is integrated in a rotor module (18) consisting of a flange (19). ) coating a bearing (28) for guiding the axis (26) of the rotor (27) and in that the stator (9) and rotor (18) modules have indexing and fixing elements, one for report to the other.
    公开号:FR3030147A1
    申请号:FR1462289
    申请日:2014-12-11
    公开日:2016-06-17
    发明作者:Gael Andrieux；Pascal Thibaut；Gaetan Riou
    申请人:MMT SA；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [0001] The present invention relates to the field of brushless multi-phase electric motors having a series of permanent magnets interacting with a soft ferromagnetic stator supporting electric coils. The coils are powered by a polyphase alternating current through an electronic commutation provided by an electronic circuit. The invention more particularly proposes an actuator formed of a motor and electronic assembly integrated in a compact and simple manner in separate modules coated (for example by overmoulding a plastic material, polymer or even metal) and then assembled. In the rest of this text, the term "motor" means the set of elements (coil, soft ferromagnetic stator, permanent magnets and possible soft ferromagnetic yoke) of the magnetic circuit for carrying out the magnetic force and " actuator "the entire engine, in its finalized version, associated with the power supply elements of the engine and position detection. STATE OF THE ART In the state of the art, a number of polyphase electric motors without permanent magnet brushes were thundered, such as those described in patent EP0949747 or EP2002531, both of the applicant. Engines of this type are composed of a wound stator assembly and a rotor assembly comprising a plurality of magnets. In order to ensure the electrical switching of the different phases of these motors, the solution generally chosen consists in using at least one Hall sensor placed opposite the plurality of magnets or an auxiliary magnet assembly dedicated to this purpose. switching. In order to produce an actuator, the Hall probes, as well as the electronic circuit controlling them, and the electrical connection assembly 5 of the motor phases must be assembled in an integral product that can be placed and used in any application. (for example to move different valves, flaps or shafts in an internal combustion engine). In the solutions of the prior art, there are various embodiments. For example, some solutions consist in partially overmolding the motor, usually only the stator being overmolded. PCT patent application WO 2009/0155625 relates to a stator assembly and a method of making a stator assembly. The stator assembly is overmolded with a thermally conductive and electrically insulating polymer composition. The stator core of the stator assembly is covered with an adhesive component to allow better heat transfer at the interface of the stator core and overmoulded coils. In the EP1897211 application, the stator assembly is overmolded and the cylinder head carrying the magnets is installed on the overmolded stator assembly before an overmolded cap also comes to close the actuator. The connection of the coils 25 is then performed when closing the cover on the stator assembly. In the application EP2212985, the wound stator is installed in an outer tube and the connection assembly and the detection assembly are placed in the tube. Finally, a lid closes the actuator. Disadvantages of prior art solutions [0009] The solutions of the prior art have the disadvantage of a complicated assembly, requiring precise mechanical positioning of the stator parts in the housing and / or with respect to the rotor. . During assembly, it is necessary to make multiple mechanical and electrical connections in order to connect the coils to a wiring harness or connection elements with the electronic circuit, the electrical connectors and, if necessary, with a printed circuit board. These different operations require great precision and are sources of fragility of the device. [0010] The overmolding solutions known in the prior art do not make it possible to ensure the coating of all the components of a stator structure and only partially make it possible to avoid the problem of assembly and electrical connections. Solution Provided by the Invention [0011] The present invention aims to overcome these drawbacks by proposing a device comprising a coated stator module, insertable in the housing of a motor or an actuator for electromagnetically interacting with a rotor. and cooperating with a rotor module. According to its more general meaning, the invention relates to an electric actuator formed of a polyphase brushless motor comprising a rotor provided with permanent magnets and secured to an output shaft, and a stator carrying coils and ensuring the magnetic drive of the rotor, a first electrical connection assembly supplying the coils, said stator being integrated in a stator module formed of a material encasing the wound stator as well as the first electrical connection assembly characterized in that the rotor is integrated in a rotor module consisting of a flange coating a bearing for guiding the rotor axis and in that the stator and rotor modules have indexing elements and fixing relative to each other. An important advantage of this modular embodiment 3030147 -4- coated is a better management of the temperature of the electrical connection assemblies and the printed circuit connecting them. Indeed, when the actuator is working at high temperature, the heat is confined to the stator, which easily withstands this thermal load, and is only weakly diffused at the rear of the actuator to the electrical connection elements. and electronic. It is thus possible to limit the heating of the printed circuit significantly in relation to the embodiments of the prior art. A main advantage of the invention and its modular embodiment is a significant reduction in the number of parts necessary for the realization of the actuator when compared to the achievements of the prior art. In a preferred but nonlimiting manner, the actuator comprises a second electrical connection assembly managing the supply and the signals of the detection elements necessary for the switching of the different phases of the motor and the stator module coats the first and second set 20 of electrical connection. This second set is thus necessary when it is desired to control the engine through an encoder assembly integrated into the engine. It is not necessary if you want to control the motor in "sensorless" sensorless mode. [0016] Preferably, the stator assembly has a cavity adapted to receive said rotor module. In one embodiment, the first and second electrical connection assemblies form a radial embedded extension of said stator module. In another embodiment, the first and second electrical connection assemblies form an axial encased extension of said stator module. Preferably, the flange has an outer shape complementary to the receiving zone of the stator module to allow easy assembly. For example, said flange of the rotor module has centering pins adapted to engage in complementary housings formed on the stator module. In a particular embodiment, the stator module 5 comprises a set of superposed sheets having a plurality of teeth, at least a portion of which supports an electric coil, each of said electrical coils having axially extending connection tabs, said a stator module further comprising a connection assembly formed of connection tabs for connecting a complementary connector, all of the components comprising said coiled sheet assembly, said coil connection tabs, and said connection tabs for connecting a connector; A connector is encapsulated in an insulating plastic material to form a monolithic block encompassing the outer surfaces of said superposed sheets. [0022] The inner surface of said teeth of the stator laminations can be made flush with respect to the inner surface of said monolithic block and the cavity made cylindrical and closed at its rear by a molded bottom. In this case, said molded bottom may comprise a ring for guiding the axis of rotation of the rotor. According to one variant, 25 teeth of the monolithic stator laminations, the thickness of the inner surface of said is included in said block the encapsulating plastics material between the surface and the cylindrical envelope being smaller than the outer cylindrical air gap of the rotor defined by the surface of the stator teeth. The invention also relates to a magnetized rotor module formed by a coated sleeve comprising a bearing for guiding the rotor, the sleeve being surrounded by a collar adapted to be fixed on a stator structure by welding or screwing or riveting. In an alternative embodiment, the cavity is open and the actuator has a third module comprising a printed circuit and closing the actuator on the rear part. The invention also relates to a manufacturing method 5 of a magnetic rotor module characterized in that it comprises the following steps: overmoulding of the front bearing to form the flange with its positioning pins and indexing, - Assembly a bundle of plates on the axis of the rotor, 10 - Bonding of the magnet (s) of the motor on the bundle of sheets, - Assembly of the rear bearing on the axis comprising the bundle of sheets. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be better understood on reading the description which follows, with reference to the appended drawings corresponding to nonlimiting examples of embodiment, in which: FIGS. 2 represent the wound stator module 20 with the electrical connection means of the motor and the detection assembly; FIG. 3 represents the coated stator module; FIGS. 4 and 5 represent views of the cavity formed in the coated stator; respectively before and after the insertion of the electronic circuit; - Figures 6 and 7 show views of the rotor module respectively in three-quarter view and in longitudinal section; - Figures 8 and 9 show views of the assembly of the 3030147 -7- coated stator and the rotor module respectively before assembly and after assembly, in a first embodiment called "disc" mode, - Figures 10 to 12 r show views of the assembly of the coated stator and the rotor module respectively before assembly (FIG. 10), in sectional view (FIG. 11) and after assembly (FIG. 12), in a second embodiment known as "tubular" mode. FIGS. 13 and 14 show views, respectively before assembling the modules and after assembling the modules, in a third embodiment where the rotor module comes around the stator module; FIG. 15 represents a sectional view of the modes; 13 and 14, FIGS. 16 and 17 show sectional views, respectively of the rotor module and the stator module, of an alternative tubular embodiment, FIG. 18 is a cross-sectional view of the engine assembled in FIGS. The described invention relates to a rotary motor formed by assembling a rotor module and a stator module. The constituents of these modules are mechanically linked to be permanently united. The rotor module is permanently assembled. Likewise, the stator module is embedded in an insulating plastic material leaving only the electrical connection elements protruding. These two modules are assembled by an insertion of the rotor module into a housing provided for this purpose in the stator module, and joined by screwing, welding or gluing. A third module may optionally close the actuator when the stator module 3030147 has a cavity opening. DETAILED DESCRIPTION OF THE FIGURES [0030] In a first embodiment, an actuator according to the invention commonly comprises a motor having a stator (1) having radially extending teeth, provided with electric coils (2) carried by bodies as described in FIG. 1. In this example described, the motor is three-phase and as described in application EP2002531, but the invention is in no way limited to this particular technology. A first connection assembly (6) is positioned on a front face of the stator (1) to ensure the electrical connection of the coils (2). Next, the second connection assembly (7), intended to manage (power supply and output signal) the detection elements (typically Hall effect sensors) necessary for the operation of the brushless motor according to the teachings of the state of the invention, is positioned. the art in the field, on an outer surface of the first connection assembly (6) as shown in Figure 2. [0033] The indexing of the first connection assembly (6) on the stator (1) is ensured by means of guide cavities (4) formed in the coil bodies (3) for precise positioning. The electrical connection is ensured by the insertion, in the notches (5) of the coil body (3), of the terminations of the first connection assembly (6), for example by displacement of the insulator (IDC for Insulation Dispiacement contact in English). In this example, there are three electrical phases that are powered by 3 separate tracks (6a, 6b, 6c). The tracks (6a, 6b, 6c) extend radially and laterally relative to the stator, and are in the form of rectangular section tracks. The tracks are terminated by forked connection tabs (not shown) for connecting an electrical phase by contact IDC. This assembly is produced by cutting and folding a metal foil, for example bronze or a copper alloy of CuZn30 type, and then overmolded with an insulating resin (8) as shown in FIG. 2. [0037] The second connection assembly (7) shown in FIG. 2 allows the connection of a set of signals - for example those of Hall probes - belonging to an encoder for detecting the position of the rotor of said motor from a printed circuit towards this same connector. Here, five tracks (7a-7e) are used to enable power and operation of Hall sensor signals. This second assembly (7) is then positioned on the first coated assembly as shown in FIG. 2. This embodiment of the stator (1), associated with the first (6) and second (7) connection assemblies, is describes more precisely in the application FR 12/59035. The stator (1) as well as the first (6) and second (7) connection assembly are coated together in an injection mold 20 to form a monolithic and closed part shown in Figure 3. The coated assembly constitutes then the stator module (9). The shape of this stator module (9) may vary depending on the end applications. In the example of FIGS. 1 to 6, it is a first embodiment called "disc" in the sense that the actuator produced has a larger dimension according to its diameter than according to its height. The coating here produced by overmoulding covers all the constituents of the stator, with the exception of the ends of the different tracks. (7a to 7e and 6a to 6c), which protrude, within two openings (10 and 11) to allow electrical connection to an external socket or an external external electronic circuit. Inside this stator module (9), the teeth 3030147 -10- of the stator (1) are either flush with overmolding or are covered with a thin skin during overmolding. This monolithic piece forming the stator module (9) has an annular cavity (12) whose bottom is closed in this first embodiment of FIG. 4. The stator module (9) has three pierced lateral protuberances (13 to 15). to allow the attachment of the actuator. The overmolded stator module (9) is thus completely sealed and autonomous. The bottom of the cavity (12) allows to exceed the lugs 10 (16a to 16e) of the second connection assembly (7), inner ends of the tracks (7a to 7e). These tabs (16a to 16e) provide the connection with an electronic circuit (17) of disc shape, which can be housed at the bottom of the cavity (12) as shown in Figure 5. [0044] The stator module (9) allows, by its shape, to receive a rotor module (18) shown in FIGS. 6 and 7. The rotor module (18) comprises a flange (19) having radially extending centering pins (20 to 24) and having also a function of mechanical rigidity.
    [0002] The flange (19) forms, on the inside of the rotor module (18), a ring (25) receiving a bearing (28) guiding the axis (26) of the magnetic rotor (27). The magnetic rotor (27) is constituted by an alternation of permanent magnets (29 to 38) of polarities (North / South 25) alternating. Figure 7 shows a sectional view of the rotor module (18) to better appreciate the relative positioning of the flange (19) and the bearing (25) for guiding the axis (26). It shows the ferromagnetic yoke (41) on which are positioned the magnets (29 to 38) and the encoder magnet (40) consisting of an alternation of magnetized polarities. This encoder magnet (40) is used for rotor position detection in conjunction with the sensing elements and the electronic circuit (17) in the bottom of the non-opening cavity (12) of the stator module (9), opposite this magnet 3030147 encoder (40) when the stator modules (9) and rotor (18) are assembled. Represents the establishment of the rotor module (18) in the stator module (9), by insertion 5 according to an axial displacement (relative to the axis of rotation of the actuator - the displacement is visualized by the thick arrow), indexing of the two modules through the lugs (20 to 24) which are housed in complementary housing (44 to 49), and then assembly by screwing, gluing, ultrasound welding or any other known assembly method. Figure 9 shows a view of the two assembled modules then forming the actuator (39) in its finalized version. Figures 10, 11 and 12 show a second embodiment of the actuator (39) in a so-called "tubular" shape, that is to say an actuator whose height dimension is greater than that of its diameter. In this variant, the actuator (39) drives a screw (42). In this example, the stator module (9) locally has an electrical connection plug (43) extending radially with respect to the axis of rotation of the actuator (39). The rotor module (18) comprises a flange (19) receiving, as well as for the first embodiment, a housing for receiving a bearing (28). Figure 11 shows a sectional view of the stator of this alternative embodiment. The rotor module (18) has an inner core formed by a stack of disc plates (50) forcibly engaged on an axis (26) and supporting permanent magnets (29 to 38) in the form of tiles. The stator (1) is fed through a connection assembly described in the European patent EP2212985 of the applicant. The stator (1) receives a second connection assembly (7) for positioning a Hall probe. This assembly is overmoulded to form a monolithic part, with a main body (51) and a secondary body (52) whose longitudinal axis is perpendicular to that of the main body (51). In the embodiments shown above, the rotor module (18) is indexed, by complementarity of the shapes of the modules, inside the stator module (9). FIGS. 13 and 14 show a third embodiment in which the rotor module (18) is fixed to the stator module (9) from the outside. The flange (19) of the rotor module (18) is indeed of a diameter greater than that of the stator (1) of the stator module (9). Figure 15 allows to appreciate the detail of the 15 elements found in this embodiment. The different pointed elements being identical in their function to those mentioned in the previous modes. The invention is not limited to a motor having a stator with radial teeth. It also applies to a motor 20 whose stator has teeth extending parallel to the axis, with a disc rotor, or a linear motor. The alternative embodiment of Figures 10, 11 and 12 allows for a so-called "tubular" version described above. [0062] It is possible to envisage an alternative embodiment in order to obtain a more compact assembly. This alternative is particularly described in FIGS. 16 to 18. This embodiment differs from the embodiment described in FIG. 10 in that the rotor module (18) comprises a second bearing (28 ') which is secured to the axis (26) after mounting the sheet package (50). This embodiment makes it possible to mount two bearings (28 and 28 ') of smaller size and allows easier assembly in the stator module (9). The rotor module (18) is typically made with the following steps: the front bearing (28) is overmolded to form the flange with its positioning and indexing lugs (20), -on assembles the sheet package (50) on the rotor shaft (26), -the engine magnet (s) (29) is glued to the sheet package (50), -assembles the rear bearing (28 ') on the axis (26) comprising the sheet package (50). In the example described, a sensor magnet 10 (53) is then assembled with its support on the free end of the shaft (by driving or screwing for example). This assembly axis + package of plates + magnets motor + rear bearing + magnet sensor on its support is finally assembled, after magnetization of the engine magnets and the sensor in place, on the overmoulded module formed of the rear bearing (28) and the flange (19). The stator module (9) particularly has an inner cavity (12) opening which allows an assembly of the rotor module (18) formed easier and come bring 20 a third module (56) closing the actuator on the rear part . After the two stator (9) and rotor (18) modules have been assembled, it remains in effect to add a complementary electronic module comprising, in this example, the printed circuit (17) receiving the detection probe (s). (55) sensor magnetic field and a closure cap (54). This embodiment advantageously allows the integration of a printed circuit of larger size (than that presented in the embodiment of Figures 10 and 11) to possibly also place a circuit
    权利要求:
    Claims (15)
    [0001]
    CLAIMS1 - Electric actuator formed of a polyphase brushless motor having a rotor (27) provided with permanent magnets (29 to 38) and integral with an output shaft (26), and a stator (1) carrying coils ( 2) and providing the magnetic drive of the rotor (27), a first electrical connection assembly (6) supplying the coils (2), said stator (1) being integrated in a stator module (9) formed of a coating material the stator (1) wound as well as the first (6) electrical connection assembly characterized in that the rotor (27) is integrated in a rotor module (18) constituted by a flange (19) coating a bearing (28) ensuring the guiding the axis (26) of the rotor (27) and in that the stator (9) and rotor (18) modules have indexing and fixing elements relative to each other.
    [0002]
    2 - Actuator according to claim 1 characterized in that it comprises a second electrical connection assembly (7) managing the power supply and the signals of the detection elements necessary for the switching of the different phases of the motor and in that the stator module coats the first (6) and second (7) electrical connection assembly.
    [0003]
    3 - actuator according to claims 1 or 2 characterized in that the stator assembly (9) has a cavity (12) adapted to receive said rotor module (18).
    [0004]
    4 - electric actuator according to claim 2 characterized in that the first (6) and second (7) electrical connection assemblies form a radial coating 35 of said stator module (9). 3030147 -16-
    [0005]
    5 - electric actuator according to claim 2 characterized in that the first (6) and second (7) electrical connection assemblies form an axial coated extension of said stator module (9). 5
    [0006]
    6 - electric actuator according to any one of the preceding claims characterized in that said flange (19) has an outer shape complementary to the indexing zone of the stator module (9). 10
    [0007]
    7 - electric actuator according to claim 6 characterized in that said flange (19) of the rotor module (18) has centering pins (20 to 24) adapted to engage in complementary housings (44 to 49) formed on the stator module (18).
    [0008]
    8 - electric actuator according to any one of the preceding claims characterized in that said stator module (18) comprises a set of superposed sheets (50) having a plurality of teeth, at least a portion of which supports an electric coil, each of said coils having said axially extending connecting tabs, said stator module (18) further comprising a connection assembly formed of connecting tabs for connecting a complementary connector, all components including said coil assembly, said coil connection tabs and said connector connection tabs are encapsulated in an insulating plastic material to form a monolithic block including the outer surfaces of said superposed sheets (50).
    [0009]
    9 - electric actuator according to claim 8 characterized in that the inner surface of said teeth of the stator laminations is flush with respect to the inner surface of said monolithic block.
    [0010]
    10 - electric actuator according to claim 3 characterized in that said cavity (12) is cylindrical is closed at its rear by a molded bottom.
    [0011]
    11 - electric actuator according to claim 10 characterized in that said molded bottom comprises a ring for guiding the axis of rotation of the rotor. 10
    [0012]
    12 - electric actuator according to claim 8 characterized in that the inner surface of said teeth of the stator plates is included in said monolithic block, the thickness of the plastic coating material being less than the gap between the outer cylindrical surface of the rotor and the cylindrical envelope defined by the surface of the stator teeth.
    [0013]
    13 - electric actuator according to claim 3 20 characterized in that the cavity (12) is open.
    [0014]
    14 - electric actuator according to claim 13 characterized in that it has a third module comprising an electronic circuit (17) and in that the third module closes the actuator on the rear part.
    [0015]
    15 - Method for manufacturing a magnetized rotor module (18) consisting of a flange (19) encasing a bearing (28) guiding the axis (26) of the rotor (27) 30 for an actuator according to the claim 1 characterized in that it comprises the following steps: overmolding the front bearing (28) to form the flange with its pins (20) for positioning and indexing, - assembling a package of sheets (50) on the axis (26) of 3030147 48- rotor, - Adhesion of magnet (s) (29) of the motor to the laminations (50), - assembly of the rear bearing (28 ') on the axle (26) comprising the package of sheets (50).
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    FR3000469B1|2013-01-03|2014-12-19|Microturbo|METHOD FOR MANAGING THE ELECTRIC POWER SUPPLY NETWORK OF AN AIRCRAFT|FR3042639B1|2015-10-20|2017-12-08|Moving Magnet Tech|LINEAR ACTUATOR WITH IMPROVED MAGNETIC STABILITY AND ARROWING STRENGTH|
    FR3045239B1|2015-12-15|2018-01-19|Moving Magnet Technologies|IMPROVED MOBILE FRAME ACTUATOR AND IMPROVED DYNAMIC|
    FR3060892B1|2016-12-21|2021-01-22|Mmt ag|MECHATRONIC ACTUATOR|
    FR3064835B1|2017-03-31|2020-01-17|Moving Magnet Technologies|STATOR FOR ELECTRIC MACHINE|
    EP3637592B1|2018-10-10|2021-04-28|Vitesco Technologies GmbH|Electric motor stator|
    DE102019206197A1|2019-04-30|2020-11-05|Mahle International Gmbh|Expansion valve|
    法律状态:
    2015-11-23| PLFP| Fee payment|Year of fee payment: 2 |
    2016-06-17| PLSC| Publication of the preliminary search report|Effective date: 20160617 |
    2016-11-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 6 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-18| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1462289A|FR3030147B1|2014-12-11|2014-12-11|ACTUATOR WITH STATORIC AND ROTORIC MODULES COATED|
    FR1462289|2014-12-11|FR1462289A| FR3030147B1|2014-12-11|2014-12-11|ACTUATOR WITH STATORIC AND ROTORIC MODULES COATED|
    US15/534,885| US10594173B2|2014-12-11|2015-12-10|Actuator with coated stator and rotor modules|
    PCT/EP2015/079302| WO2016092035A1|2014-12-11|2015-12-10|Actuator with coated stator and rotor modules|
    CN201580073064.7A| CN107112832B|2014-12-11|2015-12-10|Actuator with covered stator and rotor modules|
    EP15813743.0A| EP3231071A1|2014-12-11|2015-12-10|Actuator with coated stator and rotor modules|
    JP2017531490A| JP6768660B2|2014-12-11|2015-12-10|Actuator with coated stator module and rotor module|
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