阅读说明：本技术 永磁同步电机组件及加载惯性稳定平台 (Permanent magnet synchronous motor assembly and loading inertia stable platform ) 是由 周占民 徐迪孟 毛大鹏 于 2019-09-19 设计创作，主要内容包括：本发明提供了一种永磁同步电机组件,包括电机本体、磁编码器、安装组件和导电滑环,磁编码器包括磁盘和数据采集电路板,安装组件与电机本体固接,电机本体对应安装组件的一端凸设有同轴的凸台,磁盘的中心孔安装于凸台上,数据采集电路板安装于安装组件上且面对磁盘的端面设置,电机本体上同轴设置通孔,导电滑环安装于通孔内,安装组件上设置有供磁盘、导电滑环通过的开孔。本技术方案通过一体化的设计,将电机本体、离轴式的磁编码器、导电滑环集成到一起,结构紧凑。同时,本组件自带导电滑环和高精度磁编码器,应用本组件不仅实现高精度的电机控制,还可有效降低系统大角度或连续旋转时的线绕影响。(The invention provides a permanent magnet synchronous motor assembly which comprises a motor body, a magnetic encoder, a mounting assembly and a conductive sliding ring, wherein the magnetic encoder comprises a magnetic disk and a data acquisition circuit board, the mounting assembly is fixedly connected with the motor body, one end of the motor body, which corresponds to the mounting assembly, is convexly provided with a coaxial boss, a central hole of the magnetic disk is arranged on the boss, the data acquisition circuit board is arranged on the mounting assembly and is arranged opposite to the end face of the magnetic disk, a through hole is coaxially arranged on the motor body, the conductive sliding ring is arranged in the through hole, and an opening through which the magnetic disk and the conductive sliding ring pass is arranged. According to the technical scheme, the motor body, the off-axis magnetic encoder and the conductive slip ring are integrated together through an integrated design, and the structure is compact. Meanwhile, the assembly is provided with the conductive slip ring and the high-precision magnetic encoder, and the high-precision motor control is realized by applying the assembly, and the wire winding influence of the system in large-angle or continuous rotation can be effectively reduced.)

1. The permanent magnet synchronous motor assembly is characterized by comprising a motor body, a magnetic encoder, a mounting assembly and a conductive sliding ring, wherein the magnetic encoder comprises a magnetic disk and a data acquisition circuit board, the mounting assembly is fixedly connected with the motor body, a coaxial boss is convexly arranged at one end, corresponding to the mounting assembly, of the motor body, a central hole of the magnetic disk is arranged on the boss, the data acquisition circuit board is arranged on the mounting assembly and faces the end face of the magnetic disk, a through hole is coaxially formed in the motor body, the conductive sliding ring is arranged in the through hole, and an opening for the magnetic disk to pass through is formed in the mounting assembly.

2. The permanent magnet synchronous motor assembly of claim 1 wherein said disc is adhesively attached to said boss.

3. The permanent magnet synchronous motor assembly according to claim 1, wherein the mounting assembly comprises an adapter plate fixedly connected with the motor body and a mounting bracket fixedly connected with the adapter plate, the opening penetrates through the adapter plate and the mounting bracket, the magnetic disc is located in the adapter plate, and the data acquisition circuit board is mounted on the mounting bracket.

4. The permanent magnet synchronous motor assembly of claim 3, wherein the mounting bracket is connected to the adapter plate and the adapter plate is connected to the motor body by screws.

5. The permanent magnet synchronous motor assembly according to any one of claims 1 to 4, wherein an induction chip is disposed on the data acquisition circuit board, the induction chip is disposed facing the end face of the magnetic disk, and a gap is left between the surface of the induction chip and the end face of the magnetic disk.

6. The permanent magnet synchronous motor assembly according to claim 5, wherein the size of the gap is 0.3-0.5 mm.

7. The permanent magnet synchronous motor assembly according to claim 5, wherein a connector and a parameter storage chip are further arranged on the data acquisition circuit board, the connector is electrically connected with the sensing chip for outputting the angular position signal acquired by the sensing chip or for configuring the sensing chip, and the parameter storage chip is connected with the connector for configuring and storing the interface form of the connector.

8. The permanent magnet synchronous motor assembly of claim 7, wherein the interface of the connector is in the form of an SPI interface, an ABZ interface, or a BISS interface.

9. The permanent magnet synchronous motor assembly of claim 7, wherein the connector is a six-core connector.

10. A loaded inertially stabilized platform, wherein a permanent magnet synchronous motor assembly according to any of claims 1 to 9 is provided on said loaded inertially stabilized platform.

Technical Field

The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor assembly and an airborne inertial stabilization platform.

Background

With the development of the airborne inertially stabilized platform towards miniaturization, low cost, high precision and high integration degree, the selection and design of the motor and the sensor which are used as the main components of the platform servo control system are always more critical. The permanent magnet synchronous motor has the advantages of high torque inertia ratio, large starting torque, good force index, low temperature rise, diversified structure, high reliability and the like. With the development of rare earth permanent magnet materials becoming mature in recent years, the cost of the permanent magnet synchronous motor is gradually reduced, so that the permanent magnet synchronous motor is more and more widely applied to a small airborne inertial stabilization platform. In addition, compared with a brush torque motor, the permanent magnet synchronous motor has the advantages that the permanent magnet synchronous motor is smaller in size, can be more compact in structural design, is brushless, effectively reduces friction of a shaft system, and is higher in reliability; compared with a brushless motor with a trapezoidal wave magnetic field, the permanent magnet synchronous motor has smaller torque pulsation, so that higher servo stability precision can be realized. The high-precision magnetic field orientation control of the permanent magnet synchronous motor needs the precise position of a known rotor, and when the traditional stable platform is designed, a structural part is usually required to be independently designed to connect the magnetic encoder and the motor body, so that the structure is not compact, and the problem of winding easily occurs when the motor rotates at a large angle.

Disclosure of Invention

The invention mainly aims to provide a permanent magnet synchronous motor assembly and an airborne inertia stable platform, and aims to solve the problems that the airborne inertia stable platform in the prior art is not compact in structure and is easy to wind.

In order to achieve the above object, an embodiment of the present invention provides a permanent magnet synchronous motor assembly, which includes a motor body, a magnetic encoder, a mounting assembly, and a conductive slip ring, where the magnetic encoder includes a magnetic disk and a data acquisition circuit board, the mounting assembly is fixedly connected to the motor body, a coaxial boss is convexly disposed at an end of the motor body corresponding to the mounting assembly, a central hole of the magnetic disk is mounted on the boss, the data acquisition circuit board is mounted on the mounting assembly and faces an end surface of the magnetic disk, a through hole is coaxially disposed on the motor body, the conductive slip ring is mounted in the through hole, and an opening through which the magnetic disk and the conductive slip ring pass is disposed on the mounting assembly.

Preferably, the magnetic disk is adhesively connected to the boss.

Preferably, the mounting assembly comprises a switching disk fixedly connected with the motor body and a mounting bracket fixedly connected with the switching disk, the opening penetrates through the switching disk and the mounting bracket, the magnetic disk is located in the switching disk, and the data acquisition circuit board is mounted on the mounting bracket.

Preferably, the mounting bracket is connected with the adapter plate and the adapter plate is connected with the motor main body through screws.

Preferably, an induction chip is arranged on the data acquisition circuit board, the induction chip is arranged to face the end face of the magnetic disk, and a gap is reserved between the surface of the induction chip and the end face of the magnetic disk.

Preferably, the size of the gap is 0.3-0.5 mm.

Preferably, a connector and a parameter storage chip are further arranged on the data acquisition circuit board, the connector is electrically connected with the sensing chip and used for outputting the angle position signals acquired by the sensing chip or configuring the sensing chip, and the parameter storage chip is connected with the connector and used for configuring and storing the interface form of the connector.

Preferably, the interface of the connector is in the form of an SPI interface, an ABZ interface or a BISS interface.

Preferably, the connector is a six-core connector.

In another aspect of the loading inertially stabilized platform according to the embodiment of the present invention, the permanent magnet synchronous motor assembly is disposed on the loading inertially stabilized platform.

The permanent magnet synchronous motor assembly provided by the embodiment of the invention integrates the motor body, the off-axis magnetic encoder and the conductive sliding ring together through an integrated design, has a compact structure and can be flexibly applied to a small-sized loading inertial stabilization platform system. Meanwhile, the assembly is provided with the conductive slip ring and the high-precision magnetic encoder, and the high-precision motor control is realized by applying the assembly, and the wire winding influence of the system in large-angle or continuous rotation can be effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic diagram of an internal structure of a permanent magnet synchronous motor assembly according to an embodiment of the present invention;

FIG. 2 is an exploded view of a permanent magnet synchronous motor assembly in an embodiment of the present invention;

fig. 3 is a schematic diagram of a data acquisition board structure according to an embodiment of the present invention.

The reference numbers illustrate:

the device comprises a 1-permanent magnet synchronous motor component, a 11-motor body, a 111-boss, a 12-mounting component, a 121-adapter plate, a 122-mounting bracket, a 13-magnetic encoder, a 131-magnetic disc, a 132-data acquisition circuit board, a 1321-induction chip, a 1322-connector, a 1323-parameter storage chip, a 14-conductive slip ring and a 15-screw.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The embodiment of the invention mainly aims to provide a permanent magnet synchronous motor assembly and an airborne inertia stable platform, and aims to solve the problems that the airborne inertia stable platform in the prior art is not compact in structure and is easy to wind.

Referring to fig. 1 and fig. 2, a permanent magnet synchronous motor assembly 1 according to an embodiment of the present invention includes a motor body 11, a magnetic encoder 13, a mounting assembly 12, and a conductive slip ring 14. The magnetic encoder 13 includes a magnetic disk 131 and a data acquisition circuit board 132. The mounting assembly 12 is fixedly connected with the motor body 11, a boss coaxial with the motor body 11 is convexly arranged at one end of the motor body 11 corresponding to the mounting assembly 12, a center hole is formed in the center of the magnetic disc 131, and the magnetic disc 131 is mounted on the boss through the center hole. The data acquisition circuit board 132 is mounted on the mounting assembly 12, and the data acquisition circuit board 132 is disposed facing the end surface of the magnetic disk 131 to acquire an angle signal generated when the magnetic disk 131 rotates following the motor. The motor body 11 is coaxially provided with a through hole, the conductive slip ring 14 is installed in the through hole, the installation component 12 is provided with an opening through which the magnetic disc 131 and the conductive slip ring 14 pass, and the installation and wiring of the conductive slip ring 14 are facilitated due to the arrangement of the opening. When the through hole needs to be described, the through hole simultaneously penetrates through the boss and is coaxial with the boss. The end face of the data acquisition circuit board 132 facing the disk 131 is arranged, that is, the data acquisition circuit board 132 is arranged away from the center of the disk 131, so that the data acquisition circuit board 132 and the disk 131 form an off-axis encoder, which facilitates the installation of the conductive slip ring 14. The data acquisition circuit board 132 can sense the position of the magnetic disk 131 and then acquire the absolute angular position of the rotor of the motor.

It should be noted that the conductive slip ring 14 includes an inner ring and an outer ring which are nested, the outer ring is in contact with the inner wall of the through hole, the inner ring can be passed by the cable, the outer ring can rotate along with the motor body 11 relative to the inner ring, and the inner ring does not rotate. The arrangement of the conductive slip ring 14 enables the permanent magnet synchronous motor component 1 to continuously rotate under the condition of a shaft penetrating cable, the problem of wire winding when the motor moves in a large angle or rotates continuously is solved, and high-precision servo control is conveniently realized.

Disk 131 fixed mounting is on the boss to following motor body 11 and rotating, the boss is formed with the ladder face, and the ladder face includes mutually perpendicular's axial anchor ring and radial terminal surface, and the axial anchor ring is parallel with motor body 11's axis, and radial terminal surface is parallel with the pivot terminal surface in the motor body 11, and the centre bore and the laminating of axial anchor ring of disk 131, the terminal surface and the laminating of radial terminal surface that deviate from data acquisition circuit board 132 of disk 131, so that disk 131 with motor body 11's pivot is perpendicular.

In this embodiment, carry out the organic with magnetic encoder 13 and lead electrical slip ring 14 and PMSM's motor body 11 and combine can effectual solution structural not compact problem, can regard the PMSM who combines magnetic encoder 13 and lead electrical slip ring 14 as an subassembly simultaneously, when carrying out the design of small-size machine carried inertial stabilization platform system, only need carry out whole adoption, can effectually reduce structural design's degree of difficulty through modular design. Meanwhile, the motor assembly is assembled independently of the photoelectric platform, so that the assembly efficiency can be improved, the assembly consistency of the platform can be ensured more easily, and the motor assembly is suitable for small airborne inertially stabilized platforms produced in batch.

The magnetic disk 131 and the boss are preferably bonded, so that the structural design of the connection part is simplified.

In a preferred embodiment, the mounting assembly 12 includes an adapter plate 121 fixedly connected to the motor body 11 and a mounting bracket 122 fixedly connected to the adapter plate 121, the opening penetrates through the adapter plate 121 and the mounting bracket 122, the magnetic disk 131 is located in the adapter plate 121, and the data acquisition circuit board 132 is mounted on a surface of the mounting bracket 122 facing the adapter plate 121. During installation, the data acquisition circuit is firstly installed on the installation and installation support 122, then the installation support 122 is installed on the adapter disc 121, finally the adapter disc 121 is installed on the motor body 11, and the installation assembly 12 is designed to be split to facilitate integral installation. Optionally, the data acquisition circuit board 132 and the mounting bracket 122, the mounting bracket 122 and the adaptor plate 121, and the transfer plate and the motor main body are connected by screws 15.

It should be noted that, referring to fig. 3, the data acquisition circuit board 132 is provided with a sensing chip 1321, the sensing chip 1321 is disposed facing the end surface of the magnetic disk 131, and a gap is left between the sensing chip 1321 and the end surface of the magnetic disk 131, where the size of the gap is 0.3-0.5mm, for example, 0.4 mm. The sensing chip 1321 is used for sensing the position of the magnetic disc 131, so that the data acquisition circuit board 132 can provide an accurate position of the motor rotor angle, and the precise motion control of the motor is conveniently realized by a magnetic field orientation control method.

The data acquisition circuit board 132 is further provided with a connector 1322 and a parameter storage chip 1323, wherein the connector 1322 is electrically connected to the sensing chip 1321 and is used for outputting an angle position signal acquired by the sensing chip 1321, or is used for configuring the sensing chip 1321. Parameter storage chip 1323 is electrically connected to connector 1322 for configuring and storing the interface form of connector 1322. The interface format of connector 1322 may be configured as an SPI interface, an ABZ interface, or a BISS interface, depending on the interface requirements of the angle acquisition portion.

The connector 1322 is a six-core connector 1322, two cores of which are fixed as a 5V dc power supply and grounded, and the other four cores are multiplexed, so that the connector 1322 may serve as a configuration interface for configuring the sensing chip 1321 and an output interface of the magnetic encoder 13.

It should be noted that the conductive slip ring 14 may be adjusted according to the number of cores of the cable that needs to be transmitted by the system, and the diameters of the conductive slip rings 14 with different numbers of cores may change, and generally, the larger the number of cores is, the larger the diameter of the conductive slip ring 14 is, the diameter of the through hole needs to be adjusted correspondingly; likewise, the diameter of the boss can be adjusted according to the selected diameter of the central hole of the disk 131. And by selecting different disks 131, the angular resolution can reach 360/2¹⁹Degree or 360/2²⁰And (4) degree, and has higher angular output resolution.

In the embodiment, through the integrated design, the motor body 11 of the permanent magnet synchronous motor assembly 1, the off-axis magnetic encoder 13 and the conductive sliding ring 14 are integrated together, so that the permanent magnet synchronous motor assembly 1 integrated with the magnetic encoder 13 and the conductive sliding ring 14 is provided, the structure is compact, and the permanent magnet synchronous motor assembly can be flexibly applied to a small-sized loading inertially stabilized platform system. Meanwhile, the permanent magnet synchronous motor component 1 has the angle position measuring function of the conductive slip ring 14 and the high-precision magnetic encoder, so that high-precision motor control can be conveniently realized by using the component, and the wire winding influence of a system in large angle or continuous rotation can be effectively reduced.

In addition, the embodiment of the invention also provides a loading inertia stable platform, and the permanent magnet synchronous motor assembly 1 is arranged on the loading inertia stable platform. Because the permanent magnet synchronous motor assembly 1 is arranged on the loading inertia stable platform, the loading inertia stable platform has all the beneficial effects, which are not described herein.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.