Permanent magnet rotor test equipment

Abstract

The utility model relates to a permanent magnet rotor test device, which comprises a bedplate, a rotor clamping device and a detection device, and is characterized in that the detection device comprises a sensor and a translation driving device used for driving the sensor along the axial direction and the radial direction of a rotor; the rotor clamping device comprises a rotor supporting frame, a tip A and a tip B which are arranged on the left side and the right side of the rotor supporting frame, and a rotation driving device used for driving the tip A to rotate. According to the utility model, the test spacing can be set according to the arrangement condition of the magnetic steel in the rotor, the rotor is driven by the rotation driving device to rotate at a set speed during the test, and the sensor is driven by the translation driving device to move to a set position in sequence to realize the test of the whole length of the rotor. The tested two-dimensional magnetic field waveform can be displayed on a computer interface, whether the two-dimensional magnetic field waveform is qualified or not can be judged by comparing the two-dimensional magnetic field waveform with a standard waveform of a corresponding rotor, the whole testing process is more visual, accurate and efficient, and the method is suitable for production of a production line.

Description

Technical Field

[0001] This utility model relates to a permanent magnet rotor testing device. Background Technology

[0002] The permanent magnet rotor testing equipment is used to detect the surface magnetic distribution. It measures the accuracy of the permanent magnet rotor's magnetic sheets and the integrity of the assembled sheets, ensuring that the magnetic field performance meets the requirements for motor operation. It is suitable for both laboratory research and development and production on motor production lines. Currently, a common method is to assemble the stator and rotor into a complete unit, drive the permanent magnet rotor to rotate using a servo motor, and test the motor's back electromotive force (EMF). The peak-to-peak value, effective value, and phase difference of the back EMF are used for assessment. Another method is manual inspection using magnetic powder paper, where magnetic powder paper is attached to the outer surface of the rotor, and the image on the paper is observed for assessment.

[0003] The shortcomings and deficiencies of existing technologies are as follows: (1) Judging the magnetic field condition by the peak-to-peak value, effective value and phase difference of the back electromotive force can only reflect the magnetic field distribution of the magnet from a side perspective, which is not intuitive and accurate enough. (2) The magnetic powder paper method is intuitive, but it is manual operation, which increases human factors and is inefficient and not suitable for production line production. Therefore, there is currently no test scheme on the market that is both suitable for production line production and can intuitively measure whether the permanent magnet rotor is accurately mounted and whether the magnetic sheet assembly is complete. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a permanent magnet rotor testing device, which makes rotor magnet measurement more convenient and intuitive.

[0005] The technical solution adopted in this utility model is:

[0006] A permanent magnet rotor testing device includes a platform, a rotor clamping device disposed on the platform, and a detection device disposed on one side of the rotor clamping device. The detection device includes a sensor and a translation drive device for driving the sensor along the rotor axial and radial directions. The rotor clamping device includes a rotor support frame, a tip A and a tip B disposed on the left and right sides of the rotor support frame, and a rotation drive device for driving tip A to rotate.

[0007] Furthermore, the translation drive device includes an axial slide fixedly mounted on the platform and a radial slide mounted on the axial slide, and the sensor is a Hall sensor, which is fixedly mounted on the radial slide.

[0008] Furthermore, the rotary drive device includes a motor fixedly mounted on the platform, a rotary spindle on the output shaft of the motor, and a tip A mounted on the rotary spindle and rotating together with it.

[0009] Furthermore, a linear guide rail is provided on the platform, and a tailstock that mates with the linear guide rail is provided on the linear guide rail, with the center point B fixedly mounted on the tailstock.

[0010] Furthermore, a transverse drive device is provided between the tailstock and the platform to drive the tailstock to move along the linear guide rail.

[0011] Furthermore, the lateral movement drive device is a cylinder, with its cylinder body fixedly connected to the platform, its piston rod fixedly connected to the tailstock, and a slider provided between the tailstock and the linear guide rail.

[0012] Furthermore, the linear guide rails are two parallel lines, and the rotor support frame is positioned between the two linear guide rails.

[0013] Furthermore, tip A and tip B are coaxially arranged.

[0014] Furthermore, the motor is a stepper motor.

[0015] The positive effects of this utility model are:

[0016] This invention allows for setting the test spacing according to the arrangement of the magnets inside the rotor. During testing, the rotor rotates at a set speed under the drive of the rotation drive device, and the sensor moves sequentially to the set position under the drive of the translation drive device to achieve the test of the entire length of the rotor. The measured two-dimensional magnetic field waveform can be displayed on the computer interface, and it can be compared with the standard waveform of the corresponding rotor to determine whether it is qualified. The entire testing process is more intuitive, accurate and efficient, and it is suitable for production line production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rotor clamping device of this utility model;

[0019] Figure 3 This is a schematic diagram of the detection device of this utility model. Detailed Implementation

[0020] As attached Figure 1-3 As shown, this utility model discloses a permanent magnet rotor testing device, including a platform 1, a rotor clamping device disposed on the platform 1, and a testing device disposed on one side of the rotor clamping device.

[0021] As attached Figure 1 , 3As shown, the detection device of this utility model includes a sensor 12 and a translation drive device for driving the sensor 12 to move axially and radially along the rotor in a plane. The sensor 12 is a Hall sensor. The translation drive device includes an axial slide 10 fixedly mounted on the platform 1 and a radial slide 11 mounted on the axial slide 10. The sensor 12 is fixedly mounted on the radial slide 11. The radial slide 11 drives the sensor 12 to move radially, and the axial slide 10 drives the radial slide 11 and the sensor 12 to move together to achieve detection. The axial slide 10 and the radial slide 11 can also be replaced with a linear guide slider structure, a cylindrical guide rail, a dovetail guide rail, a V-shaped guide rail, etc., as long as axial and radial movement can be achieved.

[0022] The rotor clamping device includes a rotor support frame 6 located in the middle, centers A7 and B3 located on the left and right sides of the rotor support frame 6, and a rotary drive device for driving the rotation of the centers A7. The rotary drive device includes a motor 9 fixed on the platform 1, and a rotary spindle 8 is provided on the output shaft of the motor 9. The centers A7 are mounted on the rotary spindle 8 and rotate together with it. The motor 9 is preferably a stepper motor, but a servo motor, a DC motor, or other rotary power sources with added speed measurement function can also be used.

[0023] Preferably, two parallel linear guide rails 4 are provided on the platform 1, and the rotor support frame 6 is positioned between the two linear guide rails 4. A tailstock 2 that mates with the linear guide rails 4 is provided on the linear guide rails 4. The tip B3 is mounted on the tailstock 2 via a rotary mechanism, and the rotation centers of the tip A7 and the tip B3 are coaxial. The tailstock 2 is mounted on the linear guide rails 4 via a slider. A transverse drive device for moving the tailstock 2 along the linear guide rails 4 is provided between the tailstock 2 and the linear guide rails 4. In this embodiment, the transverse drive device is a cylinder 13. The cylinder body of the cylinder 13 is fixedly connected to the platform 1, and the piston rod is fixedly connected to the tailstock 2. The tailstock 2 is moved by the cylinder 13. The linear guide rails and slider structure can also be replaced with cylindrical guide rails, dovetail guide rails, V-shaped guide rails, etc.

[0024] Before testing, this invention sets the test spacing according to the arrangement of the magnets inside the rotor. During testing, the rotor is placed on the rotor support frame 6, the cylinder 13 extends, and pushes the tailstock 2 closer to the rotating main shaft. The center A7 on the rotating main shaft and the center B3 on the tailstock 2 clamp the rotor under test. The motor 9 is turned on, causing the rotor to rotate at a set speed. The sensor 12 moves to a set position via the axial slide 10 and the radial slide 11. After completing one revolution of testing, the sensor 12 moves axially to the next test point at the set spacing, and so on, to complete the testing of the entire length of the rotor. The two-dimensional magnetic field waveform of the rotor can be displayed on the computer interface, and the pass / fail status can be determined by comparing it with the standard waveform of the corresponding rotor. With further algorithm improvements, automatic computer judgment can also be achieved.

[0025] This invention adopts a double-rotation clamping structure, which quickly completes clamping and rotation testing. The axial and radial slides drive the sensor, and the rotation mechanism makes the testing process simple and fast. The test structure is displayed on the monitor, which is clearer and more intuitive. It is easy to integrate with automated production lines and significantly improves testing efficiency.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A permanent magnet rotor testing device, characterized in that... It includes a platform (1), a rotor clamping device disposed on the platform (1), and a detection device disposed on one side of the rotor clamping device. The detection device includes a sensor (12) and a translation drive device for driving the sensor (12) along the rotor axis and radial direction. The rotor clamping device includes a rotor support frame (6), a tip A (7) and a tip B (3) disposed on the left and right sides of the rotor support frame (6), and a rotation drive device for driving the tip A (7) to rotate.

2. The permanent magnet rotor testing device according to claim 1, characterized in that... The translation drive device includes an axial slide (10) fixedly mounted on the platform (1) and a radial slide (11) mounted on the axial slide (10). The sensor (12) is a Hall sensor and is fixedly mounted on the radial slide (11).

3. The permanent magnet rotor testing device according to claim 1, characterized in that... The rotary drive device includes a motor (9) fixedly mounted on the platform (1), a rotary spindle (8) on the output shaft of the motor (9), and a tip A (7) mounted on the rotary spindle (8) and rotating together with it.

4. The permanent magnet rotor testing device according to claim 1, characterized in that... A linear guide rail (4) is provided on the platform (1), and a tailstock (2) is provided on the linear guide rail (4) to cooperate with it. The tip B (3) is fixedly set on the tailstock (2).

5. A permanent magnet rotor testing device according to claim 4, characterized in that... A transverse drive device is provided between the tailstock (2) and the platform (1) for driving the tailstock (2) to move along the linear guide rail (4).

6. A permanent magnet rotor testing device according to claim 5, characterized in that... The transverse drive device is a cylinder (13), whose cylinder body is fixedly connected to the platform (1), and whose piston rod is fixedly connected to the tailstock (2). A slider is provided between the tailstock (2) and the linear guide rail (4).

7. A permanent magnet rotor testing device according to claim 4, characterized in that... The linear guide rails (4) are two parallel rails, and the rotor support frame (6) is located between the two linear guide rails (4).

8. A permanent magnet rotor testing device according to claim 1, characterized in that... The tip A (7) and tip B (3) are arranged coaxially.

9. A permanent magnet rotor testing device according to claim 3, characterized in that... The motor (9) is a stepper motor.

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