WO2022047772A1 - Servomoteur linéaire cylindrique à course limitée et à entraînement direct sans balai - Google Patents

Servomoteur linéaire cylindrique à course limitée et à entraînement direct sans balai Download PDF

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Publication number
WO2022047772A1
WO2022047772A1 PCT/CN2020/113709 CN2020113709W WO2022047772A1 WO 2022047772 A1 WO2022047772 A1 WO 2022047772A1 CN 2020113709 W CN2020113709 W CN 2020113709W WO 2022047772 A1 WO2022047772 A1 WO 2022047772A1
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WO
WIPO (PCT)
Prior art keywords
cover
stator
shaft
mover
direct drive
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Application number
PCT/CN2020/113709
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English (en)
Chinese (zh)
Inventor
张海风
应成炯
Original Assignee
上海福格纳机电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海福格纳机电有限公司 filed Critical 上海福格纳机电有限公司
Priority to CN202080102840.2A priority Critical patent/CN115804000A/zh
Priority to PCT/CN2020/113709 priority patent/WO2022047772A1/fr
Publication of WO2022047772A1 publication Critical patent/WO2022047772A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors

Definitions

  • the invention relates to a cylindrical brushless direct-drive limited-stroke linear servo actuator, belonging to the field of brushless motors, in particular to a single-phase, cylindrical, moving magnetic steel and single-phase motor with Brushless direct drive limited stroke linear servo actuator.
  • actuator movements can be selected from rotary actuators, but linear actuators are preferred in some application scenarios.
  • the exhaust gas recirculation poppet valve and some electronically adjustable turbocharging technologies are used in harsh application environments, requiring actuators to withstand high temperature, vibration, and corrosion, and need to have high precision, high reliability, and long life.
  • large-scale manufacturing applications such as internal combustion engines for vehicles, are sensitive to manufacturing and operating costs.
  • rotary motors are widely used and have low manufacturing costs. Linear motion is obtained by rotary motors through mechanical conversion structures.
  • both the brushed motor and the brushless DC motor are not the above.
  • the present invention explores the linear actuator of cylindrical structure.
  • the basic structure of a cylindrical linear structure motor includes a stator and a circular coil winding contained in the stator. Some have a slotless structure but have relatively low output efficiency, and some have a slotted structure. Stationarity needs to be considered.
  • the cylindrical linear structure motor also includes a mover, which is usually composed of magnetic steel and auxiliary structural parts such as a shaft and a mover yoke. Magnetic steel is divided into different schemes of axial and radial magnetization.
  • Such cylindrical structure motors are mostly multi-winding, multi-magnetic steel, multi-phase stepping motors, which are driven by pulses. In order to generate enough output force, it is usually a slender cylindrical shape.
  • a few special application scenarios use a special single-phase armature winding structure.
  • the motor can switch between two fixed positions when the current in the motor is switched between forward and reverse directions. Its characteristic is that at these two fixed positions, no current is needed to keep the mover at the corresponding fixed position.
  • This design is mainly used in two-position switch-type applications, and can realize self-locking without energy consumption in 2 fixed positions. But such actuators cannot realize servo control of any position.
  • the purpose of the present invention is to provide a cylindrical brushless direct drive limited stroke linear servo actuator, which can meet the high reliability and high precision required by special applications, and can withstand harsh high temperature, vibration and corrosion environments in special applications. At the same time, it ensures its compact structure, high output-to-weight ratio, and can realize servo control at any position within a limited stroke. In addition, the manufacturing cost is low, and the system use cost is low, so that it has extremely high technical value and economic value for large-scale manufacturing applications such as the automobile internal combustion engine industry.
  • An example structure of the cylindrical brushless direct drive limited stroke linear servo actuator of the present invention is as follows:
  • a cylindrical brushless direct drive limited stroke linear servo actuator comprising a stator, a mover, and a casing
  • the stator comprises an iron core, a skeleton, and a coil
  • the iron core is a hollow cylindrical shape, and includes a first end pole, The second end pole and the middle pole, there are annular cavities between the first end pole and the middle pole, and between the middle pole and the second end pole, respectively
  • the skeleton is arranged in the cavity, and the The coils are arranged in the skeleton, the two coils in the two skeletons are connected end to end, and the winding directions of the two coils are opposite.
  • the two skeletons may also be connected to form an integral structure.
  • the casing integrally encapsulates the iron core, the skeleton and the coil to form an integrated structure, and forms a cavity in the center that can accommodate the mover, and the mover has uniform air between the cavity and the stator. clearance, and can move linearly relative to the inner wall of the cavity.
  • the mover includes a shaft, a magnetic yoke, and a magnetic steel, the magnetic yoke is fixed to the shaft, the magnetic steel is fixed to the outside of the magnetic yoke, and the magnetic steel is fixed to the outside of the magnetic yoke. It is radially magnetized and forms an N/S alternating multipole (at least two poles) magnetic field in the axial direction of the shaft.
  • the mover is not limited to a cylindrical shape, but can also be of any other suitable shape, eg having a polygonal cross-section.
  • one end of the cavity for accommodating the mover formed by integrally covering the casing is open, and the other end forms an output shaft hole
  • the mover is loaded into the cavity
  • the One end of the shaft of the mover protrudes from the output shaft hole
  • another cover with a shaft hole is sleeved over the other end of the shaft of the mover and closes the open end of the cavity, and the mover is positioned.
  • a uniform radial air gap is formed between the mover and the stator.
  • One end of the shaft protruding from the output shaft hole can be connected with an external driven structure.
  • the launcher is fixed at one end of the shaft mounting cover of the mover, and another cover is assembled and matched with the housing at this end to close the actuator, and the cover is connected to the actuator.
  • the receiver detects the magnetic field component of the transmitter along the axis direction of the shaft of the stator and perpendicular to the axis direction at the receiver detection point.
  • the launcher is preferably a hollow cylindrical shape, and the hollow hole of the launcher is sleeved on the shaft of the mover and arranged on the shaft centerline of the mover.
  • the transmitter is magnetized with N/S poles along the axis centerline of the mover.
  • the receiver is arranged on one side of the axis centerline of the transmitter and keeps a certain distance from the transmitter.
  • the cover includes a connector for electrical connection with the outside, a PCB circuit board is arranged inside the cover, and the receiver is arranged on the PCB circuit board .
  • connection between the casing and the cover refers to the snap connection between the casing and the cover.
  • a sealing groove is provided at the connection between the casing and the cover, and a sealing member is arranged in the sealing groove.
  • connection of the stator and/or the casing and the cover is the connection of the designated stator and/or the casing and the cover with an interference fit.
  • any other suitable connection methods, such as welding, can also be used.
  • a sealing groove is provided at the connection between the stator and/or the casing and the cover, and a sealing member is arranged in the sealing groove.
  • the cover is connected with the cover, and a sealing groove is also provided at the connection, and a sealing member is arranged in the sealing groove.
  • an output shaft hole is formed by embedding a shaft sleeve.
  • the shaft sleeve is preferably a plastic shaft sleeve containing wear-resistant materials.
  • the plurality of fixing through holes formed by the casing are formed by metal bushings embedded during the forming.
  • the mover magnetic steel may be a ring, a tile, or a bread-shaped collage.
  • the actuator is servo-controlled within a limited stroke, and can realize direct-drive linear motion output without any mechanical conversion mechanisms, such as gear sets, screws, etc., and these mechanical structures are often used in harsh application environments. source of failure.
  • there is no need for carbon brush commutation of traditional brushed motors which avoids the life constraints and potential failure modes of carbon brushes on the overall system, thus greatly improving system life and reliability.
  • the mover and the stator of the actuator are arranged coaxially, especially the inner surface of the iron core of the stator is positioned by the mold, the dimensional accuracy and positional accuracy are very high, and the bottom shaft hole is formed by integral overmolding, and the dimensional accuracy and positional accuracy are also high.
  • the cover is usually preferably an injection molded part, and its positional positioning accuracy and shaft hole accuracy are also very high, so after assembly, the radial air gap between the mover and the stator is very uniform, and the magnetic field force is in the radial direction.
  • the components are evenly distributed around, and the magnetic field forces on opposite sides of the axis center are equal in magnitude and opposite in direction, so that they can be completely cancelled.
  • the mover does not bear any radial force in the stator, but only bears the push-pull force in the axial direction of the mover. Therefore, the mover bears very little frictional force relative to the stator at the position of the shaft sleeve. It not only greatly reduces the wear of the sliding surface of the bushing, but also increases the life and reliability of the sliding system, and at the same time increases the actual effective output force of the system.
  • the actuator realizes the complete sealing of all electronic components of the PCB circuit board in the cover through the sealing between the casing and/or the stator and the cover, the sealing between the casing and the cover, and the sealing between the cover and the cover.
  • This is beneficial in harsh application environments. For example, in the application of internal combustion engines, the intrusion of condensed water, emissions, condensation, dust and foreign matter often leads to various failure modes of electronic components, and this total enclosure can greatly increase the product's durability. longevity and reliability.
  • the stator of the actuator is covered by an integrated structure, which can not only fix and position all the components of the stator, but also fill the gap of the coil during the sealing process, so that the heat of the coil can be effectively and quickly passed through the iron core and the housing. Conduction to external heat dissipation.
  • the improvement of heat dissipation performance can not only improve the effective performance of the actuator, but also improve its reliability, especially in high temperature application environments.
  • the actuator of the present invention is composed of very few components, and its structure is easy to achieve large-scale stable industrialization, and the assembly process is simple and stable, so that the cost of product components and the cost of the assembly process are greatly reduced.
  • it can realize stepless servo control without commutation within the limited stroke, and can achieve reliable and accurate control through a single H-bridge like ordinary brushed motors, without the need for complex electronic commutation controllers like brushless motors.
  • the cost of the controller is greatly reduced, and all brushed motor linear applications can be replaced with good compatibility. Therefore, the overall manufacturing and system application costs of the actuator of the present invention are low and have extremely high economic value.
  • the actuator of the present invention controls the relative position of the mover by the stepless servo through the direct drive structure, and there is neither the minimum resolution constraint of the traditional stepping motor or the brushless commutation motor, nor the mechanical conversion or amplification structure.
  • the corresponding mechanical clearance is also eliminated, making its control precision extremely high.
  • the long-term position accuracy is reliable, and there is no accuracy drop due to mechanical wear and the like.
  • the receiver detects the magnetic field components along the axis of the stator shaft and perpendicular to the axis at the receiver detection point, and the difference calculation between the two can effectively compensate for the drift caused by temperature and mechanical offset.
  • the actuator of the present invention can achieve a very high slot full rate through the stator core, skeleton and coil structure, so that the actuator can be extremely compact and its output-to-weight ratio is extremely high.
  • the reduction in weight and space is of great value.
  • FIG. 1 is a front view of the actuator of the first embodiment of the present invention.
  • FIG. 2 is a plan sectional view of the actuator according to the first embodiment of the present invention taken along the line A-A in FIG. 1 .
  • FIG. 3 is a top view of the actuator rotated at an angle of 45° according to the first embodiment of the present invention.
  • FIG. 4 is a plan sectional view of the actuator according to the first embodiment of the present invention taken along the line B-B in FIG. 3 .
  • FIG. 5 is a plan sectional view of the stator of the actuator according to the first embodiment of the present invention taken along the line A-A in FIG. 1 (only a part of the structure is shown).
  • FIG. 6 is a plan view of a mover of an actuator according to a second embodiment of the present invention.
  • FIG. 7 is a plan view of a mover of an actuator according to a third embodiment of the present invention.
  • FIG. 8 is a plan view of a mover of an actuator according to a fourth embodiment of the present invention.
  • the actuator includes a stator 1 , a mover 2 , a cover 3 , a cover 4 , a PCB circuit board 5 and a casing 14 .
  • the stator 1 includes a hollow cylindrical iron core 11 (refer to FIG. 5 ), a group of annular skeletons 12 contained in the iron core 11 , and a group of coils 13 included in the group of annular skeletons 12 , The set of coils 13 are connected end to end, and the winding directions thereof are opposite.
  • the first and last ends of the coil 13 are respectively fixed to two terminals 17 (only one is shown in the figure) for electrical connection with the cover 4 .
  • the iron core 11 includes a first terminal, a second terminal 111 and an intermediate pole 112. After the first terminal, the second terminal 111 and the intermediate pole 112 are assembled, the first and second terminals are in contact. The end faces are attached, so that the outer side of the middle pole 112 is attached to the inner side of the first and second end poles.
  • the casing 14 includes a metal bushing 15 (not visible in this view), a casing bushing 16, a cover groove 18, and a cover groove 19.
  • the casing 14 is integrally covered so that the iron core 11 and the skeleton 12 , the coil 13, the metal bushing 15, and the casing bushing 16 form a solid integrated structure, and a cavity for accommodating the mover is formed around the central shaft centerline 7, and one end of the cavity forms a covering shaft of the casing.
  • the shaft hole of the sleeve 16 is open at the other end for the insertion and assembly of the mover.
  • the one-piece encapsulation solution is usually embedded injection molding.
  • a plurality of clamping claws 141 are formed on the outer peripheral side of the casing 14 during the overmolding. It is used for engaging and fixing with the buckle 44 of the cover 4 .
  • a cover groove 18 is formed at the end face of the casing 14 and the cover 4 at the same time of overmolding, and a sealing ring or glue is arranged in the cover groove 18 to realize the connection with the cover 4 .
  • Static seal
  • the cover groove can also be arranged on the cover 4 and a sealing ring or glue can be arranged in the cover groove, which can also achieve static sealing with the casing 14 .
  • a cover groove 19 is formed at the end face of the casing 14 and the cover 3 at the side of the overmolding, and a sealing ring or glue is arranged in the cover groove 19 to realize the connection with the cover 3 . Static seal.
  • the cover groove can also be arranged on the cover 3 and a sealing ring or glue can be arranged in the cover groove, and the static seal between the cover 3 and the casing 14 can also be achieved. .
  • a sealing ring or glue can be arranged in the cover groove, and the static seal between the cover 3 and the casing 14 can also be achieved.
  • any other suitable sealing methods can also be used.
  • the cover grooves 19 can also be provided at corresponding locations on the terminal pole or at corresponding locations on the terminal pole and the housing at the same time.
  • the mover 2 includes a shaft 23 , a mover yoke 21 fixed on the shaft 23 , and a magnetic steel 22 fixed on the outside of the mover yoke 21 , especially on its outer circumferential surface.
  • the magnetic steel is 2-pole radially magnetized.
  • the inner arc surface of the upper half ring portion of the magnetic steel is the N pole
  • the outer arc surface is the S pole
  • the inner arc surface of the lower half ring portion of the magnetic steel is the S pole
  • the outer arc surface is the N pole. pole.
  • the mover 2 is loaded into the stator 1 through the open end of the cavity, and one end of the shaft 23 of the mover 2 passes through the casing sleeve 16 wrapped in the shaft hole and extends out of the casing for connecting with the external driven structure. (not shown) connection.
  • the cover 3 is usually preferably an injection molded part. When the cover 3 is injection-molded, the cover sleeve 31 is embedded. 1 is effectively positioned so that the shaft center of the shaft 23 of the mover 2 is arranged at the shaft centerline 7, and a uniform air gap 6 is formed between the magnetic steel 22 of the mover and the inner surface of the cavity.
  • the cover 3 achieves a static seal at its contact interface with the stator 1 and/or the housing 14 through the seal in the cover groove 19 .
  • the end of the shaft 23 of the mover 2 protruding from the cover 3 is arranged with a launcher 24, the launcher 24 is preferably a hollow cylindrical shape, and the launcher has a launcher center hole 241 for being sleeved on the shaft 23, so that The transmitter 24 is coaxial with the shaft 23 , and the transmitter 24 is magnetized axially N/S along the shaft centerline 7 .
  • other shapes of the transmitter 24 are also optional arrangements.
  • the cover 3 is provided with a cover cover groove 32 at the end face of the side contacting with the cover cover 4, and a sealing ring or glue is arranged in the cover cover groove 32.
  • a cover cover groove 32 at the end face of the side contacting with the cover cover 4, and a sealing ring or glue is arranged in the cover cover groove 32.
  • a part of the cover terminal 41 on the inner side of the cover namely the cover coil terminal 41b, is connected to the two plug terminals 17 of the stator 1 to realize electrical connection with the coil 13, and the other part, namely the cover PCB terminal 41a, is connected to the fixed Connected to the PCB circuit board 5 inside the cover, the PCB circuit board 5 is positioned inside the cover 4 through the PCB positioning structure 43, and is connected by a certain connection means, such as plastic riveting, gluing commonly used by those skilled in the art Bonding, mechanical clamping, etc.
  • the PCB circuit board 5 is also arranged with a receiver 51, the receiver 51 is usually preferably a magneto-sensitive Hall or a magneto-resistive sensor, and the receiver 51 is arranged so that its plane and axis are The center line 7 is parallel and maintains a certain distance, and the position of the detection point intersects with the vertical line of the plane of the receiver 51 and the axis center line 7, and when the mover 2 is located relative to the stator 1 in the center of the back and forth motion stroke In the position, preferably, the detection point of the receiver 51 is located on the center plane of symmetry of the transmitter 24 perpendicular to the axis centerline 7 .
  • the foregoing arrangement solution enables the PCB circuit board 5 to be completely enclosed in the cavity between the cover 4 , the stator 1 and/or the casing 14 , and the cover 3 , so as to achieve full sealing.
  • FIG. 3 is a top view of the actuator rotated at an angle of 45° according to the first embodiment of the present invention.
  • 4 is a plan sectional view of the actuator according to the first embodiment of the present invention taken along BB in FIG. 3 .
  • the specific implementation is as follows: the casing 14 is integrally encapsulated, so that the iron core 11, the skeleton 12, the coil 13, the metal The bushing 15 and the housing bushing 16 form a solid integral structure, so that the metal bushing 15 is relatively positioned and fixed in the housing 14 .
  • the bushing holes of several metal bushings 15 (4 in the figure) are used for bolting to the installation interface.
  • the function of the metal bushing is to bear the pressure when the bolt is fixed, so as to avoid failure of the casing due to direct force.
  • the metal bushing 15 can also be arranged in the housing 14 in any other suitable manner, such as interference installation and insertion.
  • the actuator includes a stator 1 and a mover 2 (the transmitter 24 is omitted).
  • the stator 1 includes an annular iron core 11 with two cavities, a group of annular skeletons 12 contained in the cavities, and a group of coils 13 included in the group of annular skeletons 12, The coils 13 are connected end to end and are wound in opposite directions.
  • the bobbin 12 has two bobbin uprights 121 (only one is shown in FIG. 5 ), a terminal 17 is provided at the end of each bobbin upright 121 , and the two ends of the set of coils 13 are respectively connected to the two bobbins.
  • the plug terminals 17 at the ends of the frame uprights 121 are connected to each other.
  • first terminal 111 In order to enable the skeleton column 121 to extend out of the first terminal 111 , corresponding process holes may be provided in the first terminal 111 .
  • the pole pieces of the first, second and middle poles have specific chamfers, usually between 25-75° (in practice, they can be changed according to specific conditions), and the adjacent poles maintain a certain chamfer. interval distance. Under the premise of satisfying the smoothness of the magnetic circuit without generating too much local saturation loss, and taking into account the control of magnetic flux leakage between adjacent poles, sufficient space is reserved for the coil 13, thereby maximizing the reduction of the weight of the iron core and the maximization of the winding speed. The full rate of the wire slot maximizes the relative volume and weight ratio of the output.
  • the mover 2 includes a shaft 23 , a mover yoke 21 fixed on the shaft 23 , and a magnetic steel 22 fixed on the outside of the mover yoke 21 , especially on its outer circumferential surface.
  • the magnetic steel is 2-pole radially magnetized.
  • the inner arc surface of the upper half ring portion of the magnetic steel is the N pole
  • the outer arc surface is the S pole
  • the inner arc surface of the lower half ring portion of the magnetic steel is the S pole
  • the outer arc surface is the N pole. pole.
  • the center of the mover is positioned on the shaft centerline 7 and has a uniform air gap 6 with the inner circumferential surface of the iron core of the stator.
  • the actuator can be servo-controlled within a limited stroke, and can realize direct-drive linear motion output without any mechanical conversion and amplification mechanisms, such as gear sets, screws, etc., and these mechanical structures are often used in harsh applications. Root causes of failure in the environment. At the same time, there is no need for carbon brush commutation of traditional brushed motors, which avoids the life constraints and potential failure modes of carbon brushes on the overall system, thus greatly improving system life and reliability.
  • the mover 2 of the actuator is arranged coaxially with the stator 1, especially the inner surface of the iron core 11 of the stator 1 is positioned by the mold, and the dimensional accuracy and positional accuracy are very high. Overmolding, the dimensional accuracy and positional accuracy are also very high.
  • the cover 3 is usually preferably an injection molded part, and its positional positioning accuracy and shaft hole accuracy are also very high. Therefore, after assembly, the radial direction between the mover 2 and the stator 1 is The air gap is very uniform, the magnetic field force is evenly distributed around the component in the radial direction, and the magnetic field force on both sides of the shaft center is equal in magnitude and opposite in direction, which can be completely cancelled.
  • the mover 2 does not bear any radial force in the stator 1, and only bears the push-pull force in the axial movement direction of the mover 2. Therefore, the mover 2 bears a very small frictional force relative to the stator 1 at the position of the shaft sleeve. It not only greatly reduces the wear of the sliding surface of the bushing, increases the life and reliability of the sliding system, but also increases the actual effective output force of the system.
  • the actuator realizes the PCB circuit board in the cover 4 through the sealing between the stator 1 and/or the casing 14 and the cover 3, the sealing between the casing 14 and the cover 4, and the sealing between the cover 4 and the cover 3. 5 of all electronic components are fully enclosed. This is beneficial in harsh application environments, such as the intrusion of condensed water, emissions, condensation, dust and foreign matter in internal combustion engine applications, which often lead to various failure modes of electronic components, and this total enclosure can greatly increase the product life and reliability.
  • the stator 1 of the actuator can not only fix and position all components of the stator 1 through the integral covering structure, but also the casing 14 can fill the gap of the coil 13 during the covering process, so that the heating of the coil 13 can be effectively and quickly
  • the iron core 11 and the casing 14 are conducted to the outside for heat dissipation.
  • the improvement of heat dissipation performance can not only improve the effective performance of the actuator, but also improve its reliability, especially in high temperature application environments.
  • the actuator of the present invention is composed of very few components, and its structure is easy to achieve large-scale stable industrialization, and the assembly process is simple and stable, so that the cost of product components and the cost of the assembly process are greatly reduced.
  • it can realize stepless servo control without commutation within the limited stroke, and can achieve reliable and accurate control through a single H-bridge like ordinary brushed motors, without the need for complex electronic commutation controllers like brushless motors.
  • the cost of the controller is greatly reduced, and all brushed motor linear applications can be replaced with good compatibility. Therefore, the overall manufacturing and system application costs of the actuator of the present invention are low and have extremely high economic value.
  • the actuator of the present invention controls the relative position of the mover by the stepless servo through the direct drive structure, and there is neither the minimum resolution constraint of the traditional stepping motor or the brushless commutation motor, nor the mechanical conversion or amplification structure.
  • the corresponding mechanical clearance is also eliminated, making its control precision extremely high.
  • the long-term position accuracy is reliable, and there is no accuracy drop due to mechanical wear and the like.
  • the receiver 51 detects the magnetic field component of the transmitter 24 along the axis direction of the shaft 23 of the stator 1 at the receiver detection point and the magnetic field component perpendicular to the axis direction. The difference calculation between the two can effectively compensate for the temperature and mechanical offset.
  • the actuator of the present invention can achieve a very high slot filling rate, so that the actuator can be extremely compact and its output weight ratio is extremely high.
  • the reduction in weight and space is of great value.
  • FIG. 6 is top views of the separate mover structures of the actuators according to the second, third, and fourth embodiments of the present invention.
  • the mover yoke 21 is correspondingly polygonal, so that the final outer diameter of the mover 2 is a circle.
  • the magnetic steel 22 shown in the third and fourth embodiments is a 6-piece structure spliced into an annular shape, and the magnetic steel is magnetized radially, and a magnetic field with alternating N/S 2 poles is formed along the axis centerline 7.
  • the actuators are not limited to the above-mentioned numbers and corresponding embodiments.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

La présente invention concerne un servomoteur linéaire cylindrique à course limitée et à entraînement direct sans balai, comprenant : un boîtier ; un stator, comprenant un noyau en fer et une bobine située dans le noyau en fer, le noyau en fer délimitant une cavité cylindrique creuse ; un rotor, positionné au moins partiellement dans la cavité et pouvant être commandé de façon à se déplacer linéairement par rapport à la cavité, le rotor comprenant un arbre, et l'arbre comportant une première extrémité s'étendant hors du boîtier et une seconde extrémité fermée et située à l'opposé de la première extrémité ; et un dispositif de détection utilisé pour déterminer la position du rotor par rapport au stator, le dispositif de détection comprenant un émetteur fixé sur la seconde extrémité de l'arbre et un récepteur positionné de manière fixe par rapport au stator, l'émetteur étant disposé à l'opposé du récepteur et espacé de celui-ci, et le récepteur calculant, par détection de la variation d'un signal d'émetteur lorsque le rotor se déplace linéairement, la position du rotor par rapport au stator. Ce servomoteur est adapté à des environnements hostiles et a pour avantages de faibles coûts de traitement et d'assemblage.
PCT/CN2020/113709 2020-09-07 2020-09-07 Servomoteur linéaire cylindrique à course limitée et à entraînement direct sans balai WO2022047772A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080102840.2A CN115804000A (zh) 2020-09-07 2020-09-07 筒形无刷直驱有限行程直线伺服执行器
PCT/CN2020/113709 WO2022047772A1 (fr) 2020-09-07 2020-09-07 Servomoteur linéaire cylindrique à course limitée et à entraînement direct sans balai

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Application Number Priority Date Filing Date Title
PCT/CN2020/113709 WO2022047772A1 (fr) 2020-09-07 2020-09-07 Servomoteur linéaire cylindrique à course limitée et à entraînement direct sans balai

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