Airborne platform communication antenna and high-precision permanent magnet synchronous motor thereof

Abstract

The invention discloses an airborne platform communication antenna and a high-precision permanent magnet synchronous motor thereof. The high-precision permanent magnet synchronous motor comprises a motor body, a box body, a brake assembly and a sensor unit. The box body is arranged at the output end of the motor body, and an output shaft of the motor body penetrates through the box body and then extends out. The brake assembly is arranged in the box body and comprises a first brake assembly and a second brake assembly which are sequentially arranged in the axial direction of the output shaft. The sensor unit is arranged in the box body and used for obtaining the rotating direction and the rotating speed of the output shaft. The controller is arranged in the box body and feeds back the first braking assembly and the second braking assembly according to the rotating direction of the output shaft. When the output shaft rotates clockwise, the first braking assembly is adopted for braking; and when the output shaft rotates anticlockwise, the second braking assembly is adopted for braking, so that shaking in the braking process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet synchronous motors, and in particular to an airborne platform communication antenna and a high-precision permanent magnet synchronous motor thereof. Background Art

[0002] Permanent Magnet Synchronous Motor (PMSM) is a key electric transmission device. It is widely used in fields such as airborne platform communication antennas. Compared with traditional induction motors, permanent magnet synchronous motors have the advantages of high efficiency, high power density and good dynamic response, so they have received widespread attention.

[0003] Permanent magnet synchronous motor is a special type of motor, which is special in that it has the characteristics of high efficiency, high power density and high axial force density. Compared with traditional induction motors, permanent magnet synchronous motors reduce energy loss during power conversion and improve the energy utilization of the system. Permanent magnet synchronous motors have unique characteristics in high efficiency, high power density, high axial force density, fast response and low noise, so they are widely used in electric vehicles, industrial drives and renewable energy.

[0004] In the prior art, the permanent magnet synchronous motor under the airborne platform communication antenna platform has inaccurate rotation angle positioning due to different rotation speeds and its own rotational inertia in actual use. It needs to be manually fine-tuned based on experience after the motor stops, but it cannot meet actual needs. The motor will vibrate during deceleration. Summary of the invention

[0005] Based on this, it is necessary to provide an airborne platform communication antenna and a high-precision permanent magnet synchronous motor thereof to solve the problem that the permanent magnet synchronous motor under the existing airborne platform communication antenna platform will vibrate during the deceleration process.

[0006] A high-precision permanent magnet synchronous motor, comprising:

[0007] Motor body;

[0008] A box body is arranged at the output end of the motor body, and the output shaft of the motor body extends out after passing through the box body;

[0009] A brake assembly is disposed in the housing, and the brake assembly comprises a first brake assembly and a second brake assembly which are sequentially disposed along the axial direction of the output shaft;

[0010] a sensor unit, disposed in the housing, and used to obtain the rotation direction and rotation speed of the output shaft; and

[0011] A controller is disposed in the housing, and the controller provides feedback to the first brake assembly and the second brake assembly according to the rotation direction of the output shaft; when the output shaft rotates clockwise, the first brake assembly is used for braking; when the output shaft rotates counterclockwise, the second brake assembly is used for braking.

[0012] In one embodiment, the brake assembly further includes a partition, the partition is installed in the box, and the first brake assembly and the second brake assembly are respectively installed on opposite sides of the partition.

[0013] In one embodiment, the first brake assembly includes two groups of first brake units, and the two groups of first brake units are symmetrical about the center of the output shaft;

[0014] The first braking unit includes a first brake plate, a first telescopic rod and a first driving module, one end of the first brake plate is fixed to the box body, the other end of the first brake plate extends in an arc in a clockwise direction, the first telescopic rod is rotatably installed on the box body, and the first telescopic rod is connected to the first brake plate, the first driving module is installed on the box body, and the first driving module is connected to the controller to control the first telescopic rod to push the first brake plate to contact the output shaft to achieve braking.

[0015] In one embodiment, the first brake unit further includes a first fixing block and a first elastic member, the first fixing block is mounted on the box body, and two ends of the first elastic member are respectively connected to the first fixing block and the first brake plate.

[0016] In one embodiment, the second brake assembly includes two groups of second brake units, and the two groups of second brake units are symmetrical about the center of the output shaft;

[0017] The second braking unit includes a second brake plate, a second telescopic rod and a second driving module, one end of the second brake plate is fixed to the box body, the other end of the second brake plate extends in an arc shape in the counterclockwise direction, the second telescopic rod is rotatably installed on the box body, and the second telescopic rod is connected to the second brake plate, the second driving module is installed on the box body, and the second driving module is connected to the controller to control the second telescopic rod to push the second brake plate to contact the output shaft to achieve braking.

[0018] In one embodiment, the second brake unit further includes a second fixing block and a second elastic member, the second fixing block is mounted on the box body, and two ends of the second elastic member are respectively connected to the second fixing block and the second stop plate.

[0019] In one embodiment, the sensor unit includes a mounting disk, a light emitting unit and a color sensor, the mounting disk is mounted on the output shaft, the light emitting unit is mounted on the mounting disk, a plurality of groups of the light emitting units are evenly spaced along a circumferential direction on the mounting disk, the color sensor is mounted on the inner wall of the box, and the color sensor is used to collect color signals of the light emitting unit and send them to the controller.

[0020] In one embodiment, the light emitting unit includes a plurality of groups of light emitting elements capable of emitting light of different colors, and the plurality of groups of light emitting elements are evenly distributed along the same circumference of the mounting plate.

[0021] In one of the embodiments, a base is further included, and the motor body and the box body are installed on the base.

[0022] An airborne platform communication antenna, comprising:

[0023] A high-precision permanent magnet synchronous motor as described in any one of the above items.

[0024] The above-mentioned airborne platform communication antenna and its high-precision permanent magnet synchronous motor use deep learning technology to extract the characteristics and rules of motor control and optimize the control strategy and write it into the controller. After the controller determines the direction of rotation, it controls the brake component corresponding to the direction of rotation for braking. That is, when the output shaft rotates clockwise, the first brake component is used for braking; when the output shaft rotates counterclockwise, the second brake component is used for braking to reduce jitter during braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0026] Figure 1 is a structural schematic diagram of a high-precision permanent magnet synchronous motor in one embodiment;

[0027] Figure 2 for Figure 1 A schematic structural diagram of the first brake assembly;

[0028] Figure 3 for Figure 2 A schematic structural diagram of the first brake plate;

[0029] Figure 4 for Figure 1 A schematic diagram of the structure of the second brake assembly;

[0030] Figure 5 for Figure 4 A schematic diagram of the structure of the second brake plate;

[0031] Figure 6 It is a schematic diagram of the arrangement of the light-emitting unit on the mounting plate.

[0032] Reference numerals:

[0033] 10-motor body, 12-output shaft, 20-box, 30-brake assembly, 31-first brake assembly, 311-first brake unit, 312-first brake plate, 312a-first connecting hole, 313-first telescopic rod, 314-first driving module, 315-first fixing block, 316-first elastic member, 317-first friction plate, 317a-first mounting hole, 318-first screw, 32-second brake assembly, 321-second Braking unit, 322-second braking plate, 322a-second connecting hole, 323-second telescopic rod, 324-second driving module, 325-second fixing block, 326-second elastic member, 327-second friction plate, 327a-second mounting hole, 328-second screw, 33-partition, 40-sensor unit, 41-mounting plate, 42-light-emitting unit, 421-light-emitting element, 43-color sensor, 50-controller, 60-base. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the invention is not limited by the specific implementation disclosed below.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0037] An airborne platform communication antenna in one embodiment includes: Figure 1The high-precision permanent magnet synchronous motor shown includes a motor body 10 , a housing 20 , a brake assembly 30 , a sensor unit 40 and a controller 50 .

[0038] The box 20 is disposed at the output end of the motor body 10, and the output shaft 12 of the motor body 10 extends out after passing through the box 20. In one embodiment, the high-precision permanent magnet synchronous motor further includes a base 60, and the motor body 10 and the box 20 are mounted on the base 60, which can ensure the stability of the installation of the motor body 10 and the box 20.

[0039] The brake assembly 30 is disposed in the housing 20, and includes a first brake assembly 31 and a second brake assembly 32, which are sequentially disposed along the axial direction of the output shaft 12. In one embodiment, the brake assembly 30 further includes a partition 33, which is installed in the housing 20, and the first brake assembly 31 and the second brake assembly 32 are respectively installed on opposite sides of the partition 33, the first brake assembly 31 is located on a side of the partition 33 away from the motor body 10, and the second brake assembly 32 is located on a side of the partition 33 close to the motor body 10.

[0040] The sensor unit 40 is disposed in the housing 20, and is used to obtain the rotation direction and rotation speed of the output shaft 12. The controller 50 is disposed in the housing 20, and the control strategy is optimized by extracting the characteristics and rules of the motor control through deep learning technology and writing it into the controller 50. The controller 50 provides feedback to the first brake assembly 31 and the second brake assembly 32 according to the rotation direction of the output shaft 12. When the output shaft 12 rotates clockwise, the first brake assembly 31 is used for braking; when the output shaft 12 rotates counterclockwise, the second brake assembly 32 is used for braking, thereby ensuring that the output shaft 12 can be accurately braked when it reaches a predetermined angle, reducing the jitter during the braking process.

[0041] Please also read Figure 2 In one embodiment, the first brake assembly 31 includes two sets of first brake units 311, and the two sets of first brake units 311 are symmetrical about the center of the output shaft 12 so that the braking force on the output shaft 12 is balanced. Specifically, the first brake unit 311 includes a first brake plate 312, a first telescopic rod 313 and a first driving module 314.

[0042] One end of the first brake plate 312 is fixed on the housing 20, and the other end of the first brake plate 312 extends in an arc in the clockwise direction. The first telescopic rod 313 is rotatably mounted on the housing 20, and the first telescopic rod 313 is connected to the first brake plate 312. The first driving module 314 is mounted on the housing 20, and the first driving module 314 is connected to the controller 50. Through the first driving module 314 and the controller 50, the elongation of the first telescopic rod 313 can be transmitted to the controller 50 in real time, and the elongation length of the first telescopic rod 313 can also be controlled in real time by the controller 50, and the first telescopic rod 313 is controlled to push the first brake plate 312 to contact the output shaft 12 to achieve braking, or the first telescopic rod 313 is controlled to pull the first brake plate 312 away from the output shaft 12.

[0043] On the basis of the above embodiment, further, the first brake unit 311 also includes a first fixed block 315 and a first elastic member 316, the first fixed block 315 is installed on the box body 20, and the two ends of the first elastic member 316 are respectively connected to the first fixed block 315 and the first brake plate 312, and the first elastic member 316 is used to provide a pulling force, which can ensure that the first brake plate 312 is away from the output shaft 12 when the first telescopic rod 313 is not extended, so as to avoid the rotation interference of the output shaft 12 during operation. Specifically, the first elastic member 316 is a spring. Of course, the first elastic member 316 can also be other elastic structures, such as an elastic belt, etc.

[0044] Please also read Figure 3 In one embodiment, a first friction plate 317 is installed on the surface of the first brake plate 312 that rubs against the output shaft 12. The first friction plate 317 is made of wear-resistant material, such as ceramic fiber friction material. The first friction plate 317 directly rubs against the output shaft 12, which can avoid the first brake plate 312 directly rubbing against the output shaft 12, resulting in damage to the first brake plate 312. When the friction performance decreases, the first friction plate 317 can be replaced without replacing the first brake plate 312, which causes cumbersome replacement.

[0045] On the basis of the above embodiment, further, the first brake plate 312 is provided with a plurality of first connection holes 312a at intervals along its axial direction, the first friction plate 317 is provided with a plurality of first mounting holes 317a correspondingly, and the first screws 318 are inserted into the first connection holes 312a and the first mounting holes 317a in sequence, so as to realize the installation of the first friction plate 317 on the first brake plate 312. At the same time, the number of the first connection holes 312a is greater than the number of the first mounting holes 317a, so that the installation position of the first friction plate 317 can be changed, thereby changing the friction position between the first friction plate 317 and the output shaft 12, and improving the service life of the first friction plate 317.

[0046] Please also read Figure 4In one embodiment, the second brake assembly 32 includes two sets of second brake units 321, and the two sets of second brake units 321 are symmetrical about the center of the output shaft 12 so that the braking force on the output shaft 12 is balanced. Specifically, the second brake unit 321 includes a second brake plate 322, a second telescopic rod 323 and a second driving module 324.

[0047] One end of the second brake plate 322 is fixed on the housing 20, and the other end of the second brake plate 322 extends in an arc in the counterclockwise direction. The second telescopic rod 323 is rotatably mounted on the housing 20, and the second telescopic rod 323 is connected to the second brake plate 322. The second driving module 324 is mounted on the housing 20, and the second driving module 324 is connected to the controller 50. Through the second driving module 324 and the controller 50, the elongation of the second telescopic rod 323 can be transmitted to the controller 50 in real time, and the elongation length of the second telescopic rod 323 can also be controlled in real time by the controller 50, and the second telescopic rod 323 is controlled to push the second brake plate 322 to contact the output shaft 12 to achieve braking, or the second telescopic rod 323 is controlled to pull the second brake plate 322 away from the output shaft 12.

[0048] On the basis of the above embodiment, the second brake unit 321 further includes a second fixed block 325 and a second elastic member 326, the second fixed block 325 is installed on the box body 20, and the two ends of the second elastic member 326 are respectively connected to the second fixed block 325 and the second brake plate 322, and the second elastic member 326 is used to provide a pulling force, so that the second brake plate 322 can be kept away from the output shaft 12 when the second telescopic rod 323 is not extended, so as to avoid the rotation interference of the output shaft 12 during operation. Specifically, the second elastic member 326 is a spring. Of course, the second elastic member 326 can also be other elastic structures, such as an elastic belt, etc.

[0049] Please also read Figure 5 In one embodiment, a second friction plate 327 is installed on the surface of the second brake plate 322 that rubs against the output shaft 12. The second friction plate 327 is made of wear-resistant material, such as ceramic fiber friction material. The second friction plate 327 directly rubs against the output shaft 12, which can avoid the second brake plate 322 directly rubbing against the output shaft 12, resulting in damage to the second brake plate 322. After the friction performance decreases, the second friction plate 327 can be replaced without replacing the second brake plate 322, which causes cumbersome replacement.

[0050] On the basis of the above embodiment, further, the second brake plate 322 is provided with a plurality of second connection holes 322a at intervals along its axial direction, and the second friction plate 327 is provided with a plurality of second mounting holes 327a correspondingly, and the second screws 328 are inserted into the second connection holes 322a and the second mounting holes 327a in sequence, so as to realize the installation of the second friction plate 327 on the second brake plate 322. At the same time, the number of the second connection holes 322a is greater than the number of the second mounting holes 327a, so that the installation position of the second friction plate 327 can be changed, thereby changing the friction position between the second friction plate 327 and the output shaft 12, and improving the service life of the second friction plate 327.

[0051] In one embodiment, the first brake plate 312 of the first brake assembly 31 and the second brake plate 322 of the second brake assembly 32 are symmetrically distributed about the partition 33 so that the first brake assembly 31 and the second brake assembly 32 exert forces on the output shaft 12 in the same direction, thereby ensuring the stability of the braking process.

[0052] Please also read Figure 1 and Figure 6 In one embodiment, the sensor unit 40 includes a mounting disk 41, a light emitting unit 42, and a color sensor 43. The mounting disk 41 is mounted on the output shaft 12, and the mounting disk 41 is located on the side of the partition 33 close to the motor body 10. The light emitting unit 42 is mounted on the mounting disk 41, and multiple groups of light emitting units 42 are evenly spaced along the circumferential direction on the mounting disk 41. The light emitting unit 42 includes multiple groups of light emitting elements 421 that can emit light of different colors, and the multiple groups of light emitting elements 421 are evenly spaced along the same circumference of the mounting disk 41. The color sensor 43 is mounted on the inner wall of the box 20, and the color sensor 43 is used to collect the color signal of the light emitting unit 42 and send it to the controller 50 in real time.

[0053] Specifically in this embodiment, the light-emitting unit 42 is a three-color light combination, that is, the number of light-emitting elements 421 is three, including red, yellow and blue light-emitting diodes, respectively, and the three diodes are equidistantly arranged, and the light color of the light-emitting unit 42 is collected by the color sensor 43. If the collected colors are in the order of red, yellow and blue, the rotation direction of the output shaft 12 is clockwise, and if the collected colors are in the order of blue, yellow and red, the rotation direction of the output shaft 12 is counterclockwise. In the case of high speed, the real-time rotation speed of the output shaft 12 can be calculated by the time difference between the color light signals of adjacent light-emitting units 42 and the distance between the light-emitting unit 42 and the center of the output shaft 12. In the case of low speed, the real-time rotation speed of the output shaft 12 at low speed can be calculated by the time difference between adjacent different light signals in the light-emitting unit 42 and the distance between the light-emitting unit 42 and the center of the output shaft 12.

[0054] The specific braking accuracy can be adjusted by setting the number of light-emitting units 42 on the mounting plate 41, and the specific braking accuracy can also be adjusted by adjusting the size and spacing of the three-color lights in the light-emitting unit 42. With the color sensor 43 of different acquisition frequencies, accurate acquisition of the rotation angle and rotation speed can be achieved. When the controller 50 obtains the external braking angle signal, the output shaft 12 is braked and decelerated. When the speed is too high, the speed is decelerated first and then the braking operation is performed.

[0055] The above-mentioned airborne platform communication antenna and its high-precision permanent magnet synchronous motor use deep learning technology to extract the characteristics and rules of motor control and optimize the control strategy and write it into the controller 50. After the controller 50 determines the rotation direction, it controls the brake component 30 corresponding to the rotation direction for braking. That is, when the output shaft 12 rotates clockwise, the first brake component 31 is used for braking; when the output shaft 12 rotates counterclockwise, the second brake component 32 is used for braking to reduce jitter during braking.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A high-precision permanent magnet synchronous motor, characterized in that: include: Motor body; A box body is arranged at the output end of the motor body, and the output shaft of the motor body passes through the box body and then extends out; A brake assembly is disposed in the housing, and the brake assembly comprises a first brake assembly and a second brake assembly which are sequentially disposed along the axial direction of the output shaft; A sensor unit is disposed in the housing, and is used to obtain the rotation direction and rotation speed of the output shaft; and A controller is disposed in the housing, and the controller provides feedback to the first brake assembly and the second brake assembly according to the rotation direction of the output shaft; when the output shaft rotates clockwise, the first brake assembly is used for braking; when the output shaft rotates counterclockwise, the second brake assembly is used for braking.

2. The high-precision permanent magnet synchronous motor according to claim 1, characterized in that: The brake assembly further includes a partition plate, which is installed in the box body, and the first brake assembly and the second brake assembly are respectively installed on two opposite sides of the partition plate.

3. The high-precision permanent magnet synchronous motor according to claim 2, characterized in that: The first brake assembly includes two groups of first brake units, and the two groups of first brake units are symmetrical about the center of the output shaft; The first braking unit includes a first brake plate, a first telescopic rod and a first driving module, one end of the first brake plate is fixed to the box body, the other end of the first brake plate extends in an arc in a clockwise direction, the first telescopic rod is rotatably installed on the box body, and the first telescopic rod is connected to the first brake plate, the first driving module is installed on the box body, and the first driving module is connected to the controller to control the first telescopic rod to push the first brake plate to contact the output shaft to achieve braking.

4. The high-precision permanent magnet synchronous motor according to claim 3, characterized in that: The first brake unit further includes a first fixing block and a first elastic member. The first fixing block is mounted on the box body. Two ends of the first elastic member are respectively connected to the first fixing block and the first brake plate.

5. The high-precision permanent magnet synchronous motor according to claim 2, characterized in that: The second brake assembly includes two groups of second brake units, and the two groups of second brake units are symmetrical about the center of the output shaft; The second braking unit includes a second brake plate, a second telescopic rod and a second driving module, one end of the second brake plate is fixed to the box body, the other end of the second brake plate extends in an arc shape in the counterclockwise direction, the second telescopic rod is rotatably installed on the box body, and the second telescopic rod is connected to the second brake plate, the second driving module is installed on the box body, and the second driving module is connected to the controller to control the second telescopic rod to push the second brake plate to contact the output shaft to achieve braking.

6. The high-precision permanent magnet synchronous motor according to claim 5, characterized in that: The second brake unit further includes a second fixing block and a second elastic member. The second fixing block is mounted on the box body. Two ends of the second elastic member are respectively connected to the second fixing block and the second stop plate.

7. The high-precision permanent magnet synchronous motor according to claim 1, characterized in that: The sensor unit includes a mounting disk, a light emitting unit and a color sensor. The mounting disk is mounted on the output shaft, the light emitting unit is mounted on the mounting disk, a plurality of groups of the light emitting units are evenly spaced along a circumferential direction on the mounting disk, the color sensor is mounted on the inner wall of the box, and the color sensor is used to collect the color signal of the light emitting unit and send it to the controller.

8. The high-precision permanent magnet synchronous motor according to claim 7, characterized in that: The light-emitting unit comprises a plurality of groups of light-emitting elements capable of emitting light of different colors, and the plurality of groups of light-emitting elements are evenly distributed along the same circumference of the mounting plate.

9. The high-precision permanent magnet synchronous motor according to claim 1, characterized in that: It also includes a base, and the motor body and the box body are installed on the base.

10. An airborne platform communication antenna, characterized in that: include: A high-precision permanent magnet synchronous motor as described in any one of claims 1 to 9.

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