A servo motor torque fluctuation test platform capable of accurately simulating load mutation and moment of inertia change

Abstract

This invention relates to a servo motor torque fluctuation testing platform capable of accurately simulating sudden load changes and rotational inertia variations. Its structure includes a frame, a vibration isolation platform mounted on the frame, a first servo motor, an adjustable inertia disk, a first servo motor turntable, an adjustable inertia disk turntable, a first pulley, a second pulley, a load turntable, a high-precision torque sensor, a high-precision angle encoder, and a loading motor mounted on the vibration isolation platform. This invention features less fluctuation in loading torque, a simple and reasonable structure, lower equipment performance requirements, high precision in rotational inertia adjustment, high accuracy in test data, small system error, and ease of maintenance. This invention uses a permanent magnet direct-drive motor and an adjustable inertia disk for coordinated loading, which can accurately simulate various minute load changes and rotational inertia variations of the drive motor.

Description

Technical Field

[0001] This invention relates to the field of servo motor torque fluctuation testing, specifically to a servo motor torque fluctuation testing platform that can accurately simulate sudden load changes and rotational inertia variations. Background Technology

[0002] As an indispensable power device in modern industry, electric motors are widely used in automobiles, robotics, aerospace, communication technology, machine tools, and many other fields. The advancement of modern industry has placed higher demands on the high-precision control of electric motors. As a core power device in modern industry, the stability of the motor's output torque directly determines the performance indicators of the equipment, such as operational smoothness, noise level, and service life. Torque fluctuation in an electric motor refers to the periodic or non-periodic changes in its output torque over time during operation. This fluctuation can severely impact the performance indicators of the equipment. Therefore, accurately measuring and analyzing motor torque fluctuations is crucial for improving motor performance and reliability, and ensuring the normal and efficient operation of the equipment.

[0003] Based on this, it is of great significance to design and develop a test platform that can accurately simulate sudden load changes and rotational inertia changes, thereby simulating various operating conditions of the drive motor and testing the torque fluctuation of the servo motor under these simulated operating conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a servo motor torque fluctuation test platform that can accurately simulate load mutations and changes in rotational inertia. It features that the loading torque is not easily fluctuated, the structure is simple and reasonable, the equipment precision requirements are low, the rotational inertia adjustment accuracy is high, the detection data accuracy is high, the system error is small, and it is easy to maintain. By using a permanent magnet direct drive motor and an adjustable inertia disk to load the first servo motor, it can accurately simulate various minute load mutations and changes in the rotational inertia of the first servo motor.

[0005] To achieve the above objectives, this application provides a servo motor torque fluctuation test platform that can accurately simulate load abrupt changes and rotational inertia variations. The platform includes a frame, a vibration isolation platform mounted on the frame, and a first servo motor, an adjustable inertia disk, a first servo motor turntable, an adjustable inertia disk turntable, a first pulley, a second pulley, a load turntable, a high-precision torque sensor, a high-precision angle encoder, and a loading motor mounted on the vibration isolation platform.

[0006] The output shaft of the first servo motor is connected to the first servo motor turntable by a key, and the first servo motor and the first servo motor turntable are fixedly mounted on the vibration isolation platform by the first servo motor mounting bracket.

[0007] The base shaft of the adjustable inertia disk is connected to the adjustable inertia disk turntable by a key, and the adjustable inertia disk and the adjustable inertia disk turntable are fixedly installed on the vibration isolation platform by the adjustable inertia disk fixing frame.

[0008] The first servo motor turntable is connected to the load turntable via a first pulley, and the adjustable inertia disk turntable is connected to the load turntable via a second pulley.

[0009] The load turntable is fixedly connected to the first drive shaft via the first flange. The first drive shaft is axially connected to the right output shaft of the high-precision torque sensor via the first coupling of the torque sensor. The left output shaft of the high-precision torque sensor is axially connected to the second drive shaft via the second coupling of the torque sensor.

[0010] The high-precision angle encoder is fixedly mounted on the vibration isolation platform by a third fixing bracket.

[0011] The output shaft of the loading motor is fixedly connected to the second transmission shaft through a third coupling, and the loading motor is fixedly mounted on the vibration isolation platform through a fourth fixing bracket.

[0012] Furthermore, the first drive shaft is fixedly mounted on the vibration isolation platform by a first fixing bracket, the high-precision torque sensor is fixedly mounted on the vibration isolation platform by a second fixing bracket, and the second drive shaft is fixedly mounted on the vibration isolation platform by a third fixing bracket.

[0013] Furthermore, the vibration isolation platform is an optical vibration isolation platform.

[0014] Furthermore, the first servo motor and the loading motor have built-in speed sensors and torque sensors.

[0015] Furthermore, the loading motor is a permanent magnet direct drive motor.

[0016] Compared with existing technologies, the advantages of this invention are: by using a permanent magnet direct drive motor and an adjustable inertia disk to collaboratively load the drive motor, the load mutations and rotational inertia changes of the drive motor can be simulated with high quality on the same testing device, and the torque fluctuations of the drive motor can be tested under this simulated working condition. The advantages of using a permanent magnet direct drive motor to simulate load mutations in the drive motor are: first, fast response speed and a wide simulated torque range, capable of simulating various load mutation situations; second, high accuracy, capable of simulating small-amplitude load mutations. The advantages of using an adjustable inertia disk to simulate rotational inertia changes in the drive motor are: first, by adding or removing counterweights and adjusting the replaceable inertia disk, multi-condition simulation can be performed, capable of simulating various rotational inertia changes; second, by adding or removing counterweights and adjusting the replaceable inertia disk, the adjustment of rotational inertia is highly accurate, and the test repeatability is high. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] The labels in the diagram represent: 1. Frame; 2. Vibration isolation platform; 3. First servo motor; 4. Adjustable inertia disk; 5. First servo motor turntable; 6. Adjustable inertia disk turntable; 7. First pulley; 8. Second pulley; 9. Load turntable; 10. High-precision torque sensor; 11. High-precision angle encoder; 12. Loading motor; 13. First servo motor mounting bracket; 14. Adjustable inertia disk mounting bracket; 15. First flange; 16. First drive shaft; 17. First coupling; 18. Second coupling; 19. Second drive shaft; 20. Third mounting bracket; 21. Third coupling; 22. Fourth mounting bracket; 23. First mounting bracket; 24. Second mounting bracket. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] The terms “first,” “second,” etc., are used only to distinguish one entity or operation from another, and should not be construed as indicating or implying relative importance, nor as requiring or implying any such actual relationship or order between these entities or operations.

[0023] Please see the appendix Figure 1This application provides a servo motor torque fluctuation test platform that can accurately simulate sudden load changes and rotational inertia changes. The invention will be further described below.

[0024] As attached Figure 1 The servo motor torque fluctuation test platform shown can accurately simulate load changes and rotational inertia changes, including a frame 1, a vibration isolation platform 2 set on the frame, a first servo motor 3, an adjustable inertia disk 4, a first servo motor turntable 5, an adjustable inertia disk turntable 6, a first pulley 7, a second pulley 8, a load turntable 9, a high-precision torque sensor 10, a high-precision angle encoder 11, and a loading motor 12.

[0025] The output shaft of the first servo motor 3 is connected to the first servo motor turntable 5 by a key, and the first servo motor 3 and the first servo motor turntable 5 are fixedly mounted on the vibration isolation platform 2 by the first servo motor mounting bracket 13.

[0026] The base shaft of the adjustable inertia disk 4 is connected to the adjustable inertia disk turntable 6 by a key. The adjustable inertia disk 4 and the adjustable inertia disk turntable 6 are fixedly installed on the vibration isolation platform 2 by the adjustable inertia disk fixing bracket 14.

[0027] The first servo motor turntable 5 is connected to the load turntable 9 via the first pulley 7, and the adjustable inertia turntable 6 is connected to the load turntable 9 via the second pulley 8.

[0028] The load turntable 9 is fixedly connected to the first drive shaft 16 via the first flange 15. The first drive shaft 16 is axially connected to the right output shaft of the high-precision torque sensor 10 via the first torque sensor coupling 17. The left output shaft of the high-precision torque sensor 10 is axially connected to the second drive shaft 19 via the second torque sensor coupling 18.

[0029] The high-precision angle encoder 11 is fixedly mounted on the vibration isolation platform 2 by the third fixing frame 20.

[0030] The output shaft of the loading motor 12 is fixedly connected to the second transmission shaft 19 through the third coupling 21, and the loading motor 12 is fixedly mounted on the vibration isolation platform 2 through the fourth fixing bracket 22.

[0031] The first drive shaft 16 is fixedly mounted on the vibration isolation platform 2 by the first fixing bracket 23, the high-precision torque sensor 10 is fixedly mounted on the vibration isolation platform 2 by the second fixing bracket 24, and the second drive shaft 19 is fixedly mounted on the vibration isolation platform 2 by the third fixing bracket 20.

[0032] The above description constitutes the main structure of the present invention.

[0033] When simulating the operating condition of the first servo motor 3 under sudden load changes, by operating the loading motor 12, the specified sudden load change can be transmitted to the first servo motor 3 through the third coupling 21-second drive shaft 19-second coupling 18-output shaft of high-precision torque sensor 10-first coupling 17-first drive shaft 16-load turntable 9-first pulley 7-first servo motor turntable 5, thereby applying a load disturbance to the first servo motor 3. When simulating the change in rotational inertia of the first servo motor 3, by adjusting the replaceable inertia disk on the adjustable inertia disk 4, the desired change in rotational inertia of the first servo motor 3 can be transmitted to the first servo motor 3 through the second pulley 8-load turntable 9-first pulley 7-first servo motor turntable 5, thereby changing the rotational inertia of the first servo motor 3.

[0034] When testing the first servo motor 3, the torque at the output end of the first servo motor 3 can be measured by the high-precision torque sensor 10 and the torque sensor built into the first servo motor 3. The angular displacement at the final output end of the first servo motor 3 can be measured by the high-precision angle encoder 11. The first servo motor 3 has a built-in speed sensor, through which the output speed of the first servo motor 3 can be measured. Based on the measured data, the performance parameters of the first servo motor 3 can be obtained by calculation and analysis with the help of a computer.

[0035] When testing the loading motor 12, the torque at the output end of the loading motor 12 can be measured by the high-precision torque sensor 10 and the torque sensor built into the loading motor 12. The angular displacement at the final output end of the loading motor 12 can be measured by the high-precision angle encoder 11. The loading motor 12 has a built-in speed sensor, which can be used to measure the output speed of the loading motor 12. Based on the measured data, the performance parameters of the loading motor 12 can be obtained by calculation and analysis with the help of a computer.

[0036] The vibration isolation platform 2 is an optical vibration isolation platform, which enhances the anti-interference ability of the present invention during operation, improves the system stability and flatness of the installation platform during the testing process, thereby improving the accuracy of torque fluctuation testing.

[0037] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A servo motor torque fluctuation test platform capable of accurately simulating sudden load changes and rotational inertia variations, characterized in that: The system includes a frame, a vibration isolation platform mounted on the frame, and a first servo motor, an adjustable inertia disk, a first servo motor turntable, an adjustable inertia disk turntable, a first pulley, a second pulley, a load turntable, a high-precision torque sensor, a high-precision angle encoder, and a loading motor, all mounted on the vibration isolation platform. The output shaft of the first servo motor is connected to the first servo motor turntable by a key, and the first servo motor and the first servo motor turntable are fixedly mounted on the vibration isolation platform by the first servo motor mounting bracket. The base shaft of the adjustable inertia disk is connected to the adjustable inertia disk turntable by a key, and the adjustable inertia disk and the adjustable inertia disk turntable are fixedly installed on the vibration isolation platform by the adjustable inertia disk fixing frame. The first servo motor turntable is connected to the load turntable via a first pulley, and the adjustable inertia disk turntable is connected to the load turntable via a second pulley; The load turntable is fixedly connected to the first drive shaft via the first flange. The first drive shaft is axially connected to the right output shaft of the high-precision torque sensor via the first coupling of the torque sensor. The left output shaft of the high-precision torque sensor is axially connected to the second drive shaft via the second coupling of the torque sensor. The high-precision angle encoder is fixedly mounted on the vibration isolation platform by a third fixing bracket; The output shaft of the loading motor is fixedly connected to the second transmission shaft through a third coupling, and the loading motor is fixedly mounted on the vibration isolation platform through a fourth fixing bracket.

2. The servo motor torque ripple test platform capable of accurately simulating load mutation and moment of inertia change according to claim 1, characterized in that: The first drive shaft is fixedly mounted on the vibration isolation platform by a first fixing bracket, the high-precision torque sensor is fixedly mounted on the vibration isolation platform by a second fixing bracket, and the second drive shaft is fixedly mounted on the vibration isolation platform by a third fixing bracket.

3. The servo motor torque ripple test platform capable of accurately simulating load mutation and moment of inertia change according to claim 1 or 2, characterized in that: The vibration isolation platform is an optical vibration isolation platform.

4. The servo motor torque ripple test platform capable of accurately simulating load step and moment of inertia change according to claim 3, characterized in that: The first servo motor and the loading motor have built-in speed sensors and torque sensors.

5. A servo motor torque fluctuation test platform capable of accurately simulating sudden load changes and rotational inertia variations according to claim 4, characterized in that: The loading motor is a permanent magnet direct drive motor.

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