Testing device for frequency converter maintenance

By designing a test device for inverter maintenance, and automatically detecting the inverter terminals using components such as clamping motors and servo motors, the cumbersome and error-prone power-on testing problems in the existing technology are solved, and the testing efficiency and accuracy are improved.

CN223296061UActive Publication Date: 2025-09-02NANJING TRIPLE SPEED ELECTROMECHANICAL CO LTD
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Patent Information

Application Number
CN202422177376.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-05
Publication Date
2025-09-02
Estimated Expiration
2034-09-05

AI Technical Summary

Technical Problem

The power-on test process of existing inverters is cumbersome and prone to errors, and requires tedious manual operation.

Method used

A test device for frequency converter maintenance is designed, using components such as clamping motors, servo motors and control terminals to automatically clamp the inverter and automatically detect the inverter terminals through the test components to form a test circuit and complete the automatic detection process.

Benefits of technology

It realizes automatic detection of inverter terminals, simplifies the test process, reduces manual operation errors, and improves test efficiency and accuracy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a testing device for maintenance of a frequency converter, which belongs to the technical field of frequency converter testing and comprises a bottom plate, a baffle plate, a chute, a clamping plate, a screw rod, a clamping motor, a sliding rod and a control terminal are arranged on the surface of the bottom plate, supports are arranged at one end of the bottom plate, and a testing assembly and a collision plate are arranged between the supports. Under the combined action of the sliding groove, the clamping plate, the screw rod, the clamping motor, the sliding rod and the control terminal, the frequency converter to be tested can be automatically clamped, the control terminal controls the test assembly to rotate intermittently, the probe makes contact with a terminal of the frequency converter, the firing pin makes contact with the collision plate, and a test circuit is formed to test a port of the frequency converter. The probe drives the movable sleeve to rotate and fold in the leaving process, the firing pin extrudes the collision plate in the leaving process to enable the collision plate to rotate and fold, after the probe and the firing pin leave the test area, the movable sleeve resets under the action of the torsion spring, the collision plate resets under the action of the elastic force of the spring, and the function of automatic detection is achieved.
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Description

Technical Field

[0001] The utility model relates to the technical field of frequency converter testing, in particular to a test device for frequency converter maintenance. Background Art

[0002] The inverter is a power control device that changes the motor's operating power frequency to provide the required power voltage according to the motor's operating needs, thereby achieving energy conservation and speed regulation. The inverter requires maintenance after a period of operation to eliminate possible risks. Maintenance includes testing the inverter terminals. Inverter testing includes power-on testing before loading.

[0003] The existing power-on test method involves a technician manually touching two test pens of a multimeter to the inverter terminals. The technician then visually compares the multimeter readings to determine if the inverter is faulty. This test requires adjusting the multimeter mode twice and operating the test pens thirteen times using seven different test methods. This process is cumbersome and prone to errors. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that tedious manual operations are required when testing the frequency converter through power-on, and to propose a test device for frequency converter maintenance.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A test device for inverter maintenance, comprising a base plate, a baffle and a slide groove are provided on the surface of the base plate, a splint is provided between the baffles, a screw is provided at one end of the baffle, one end of the screw is rotatably connected to the baffle, the other end of the screw passes through the splint and is rotatably connected to a clamping motor, a bracket is provided at one end of the base plate, a servo motor and a mounting seat are relatively provided on the top of the bracket, the output end of the servo motor is rotatably connected to a roller, the other end of the roller is rotatably connected to the mounting seat, a test assembly is provided on the outer wall of the roller, a collision plate is installed on one side of the mounting seat corresponding to the test assembly, and a control terminal is provided on the side of the base plate close to the collision plate.

[0007] Preferably, a sliding rod is provided in the sliding groove, and the bottom of the splint is slidably connected to the sliding rod via a slider.

[0008] Preferably, the test assembly includes a mounting tube, both ends of the mounting tube are fixedly connected with pillars, the mounting tube is fixedly connected to the outer wall of the roller through the pillars, and the outer wall of the mounting tube is provided with a mounting groove matching the inverter terminal.

[0009] Preferably, the installation grooves are spaced around the installation cylinder in accordance with the test sequence of the frequency converter, and a through hole is formed at one end of the installation grooves.

[0010] Preferably, a movable sleeve is rotatably connected in the mounting groove, a probe is fixedly installed on the input end of the movable sleeve, a fixed sleeve is provided on one side of the movable sleeve, a torsion spring is provided at the rotating shaft of the movable sleeve, and one end of the torsion spring is bonded to the fixed sleeve by glue.

[0011] Preferably, a striker is provided on the side of the pillar facing the collision plate, and the input end of the striker is connected to the output end of the probe through an electric wire passing through the movable sleeve.

[0012] Preferably, the top of the collision plate is rotatably connected to the mounting seat, a metal sheet is fixedly mounted on the surface of the collision plate, the bottom of the collision plate is rotatably connected to a spring, and the other end of the spring is rotatably connected to the mounting seat.

[0013] Preferably, the spacing between the metal sheets matches the striker, and the metal sheets are electrically connected to the control terminal.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model can automatically clamp the inverter to be tested under the joint action of the slide, clamping plate, screw rod, clamping motor, slide rod and control terminal. The control terminal controls the clamping motor to drive the screw rod to rotate according to preset data. When the screw rod rotates, it drives the clamping plate to move along the slide rod toward the baffle. It stops running when it reaches the set value, and the inverter is limited by the baffle and clamping plate.

[0016] 2. The utility model sets a test component, and the control terminal controls the servo motor to drive the roller to drive the test component to intermittently rotate toward the terminal. When the test component rolls, the probe contacts the terminal of the inverter and the striker contacts the collision plate. A test circuit is formed through the probe, the striker, the metal plate, and the control terminal to test the inverter port. After completing a test, the probe is blocked by the terminal during rotation, thereby driving the movable sleeve to rotate and fold into the installation slot, so that the probe can leave the test area, and the striker squeezes the collision plate so that the collision plate rotates and folds along the mounting seat to pass the striker. When the probe and the striker leave the test area, the movable sleeve drives the probe to reset under the action of the torsion spring, and the collision plate drives the metal plate to reset under the elastic force of the spring, thereby realizing the function of automatic detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a test device for inverter maintenance proposed by the utility model;

[0018] Figure 2This is a schematic diagram of the working state of a test device for inverter maintenance proposed by the utility model;

[0019] Figure 3 This is a structural diagram of a slideway in a test device for inverter maintenance proposed by the present invention;

[0020] Figure 4 This is a top view of the working state of a test device for inverter maintenance proposed by the utility model;

[0021] Figure 5 This is a structural diagram of the output end of a test component in a test device for inverter maintenance proposed by the present invention;

[0022] Figure 6 This is a structural diagram of the input end of a test component in a test device for inverter maintenance proposed by the present invention;

[0023] Figure 7 The present invention provides a schematic structural diagram of a collision plate in a test device for inverter maintenance.

[0024] In the figure: 1. Base plate; 2. Baffle; 3. Slide groove; 4. Clamping plate; 5. Screw; 6. Clamping motor; 7. Bracket; 8. Servo motor; 9. Mounting seat; 10. Roller; 11. Collision plate; 12. Control terminal; 13. Slide rod; 14. Mounting tube; 15. Pillar; 16. Mounting groove; 17. Movable sleeve; 18. Probe; 19. Fixed sleeve; 20. Torsion spring; 21. Strike pin; 22. Metal sheet; 23. Spring. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Reference Figure 1-7A test device for inverter maintenance includes a base plate 1, a baffle 2 and a slide groove 3 are provided on the surface of the base plate 1, a splint 4 is provided between the baffles 2, a screw rod 5 is provided at one end of the baffle 2, one end of the screw rod 5 is rotatably connected to the baffle 2, and the other end of the screw rod 5 passes through the splint 4 and is rotatably connected to the clamping motor 6, a bracket 7 is provided at one end of the base plate 1, a servo motor 8 and a mounting seat 9 are relatively provided on the top of the bracket 7, the output end of the servo motor 8 is rotatably connected to a roller 10, and the other end of the roller 10 is rotatably connected to the mounting seat 9, a test assembly is provided on the outer wall of the roller 10, a collision plate 11 is installed on one side of the mounting seat 9 corresponding to the test assembly, and a control terminal 12 is provided on the side of the base plate 1 close to the collision plate 11.

[0027] It should be noted that the clamping motor 6 is electrically connected to the control terminal 12. The control terminal 12 controls the clamping motor 6 to drive the screw 5 to rotate according to the preset data. When the screw 5 rotates, it drives the clamping plate 4 to move along the slide bar 13 toward the baffle 2. When it reaches the set value, it stops running and limits the inverter through the baffle 2 and the clamping plate 4.

[0028] Furthermore, a slide rod 13 is provided in the slide groove 3, and the bottom of the clamping plate 4 is slidably connected to the slide rod 13 through a slider.

[0029] Furthermore, the test assembly includes a mounting tube 14, at both ends of which are fixedly connected to pillars 15. The mounting tube 14 is fixedly connected to the outer wall of the roller 10 through the pillars 15. The outer wall of the mounting tube 14 is provided with a mounting groove 16 that matches the inverter terminal. The mounting groove 16 is spaced around the mounting tube 14 corresponding to the test sequence of the inverter. A through hole is provided at one end of the mounting groove 16. A movable sleeve 17 is rotatably connected in the mounting groove 16. A probe 18 is fixedly installed at the input end of the movable sleeve 17. A fixed sleeve 19 is provided on one side of the movable sleeve 17. A torsion spring 20 is provided at the rotating shaft of the movable sleeve 17. One end of the torsion spring 20 is bonded to the fixed sleeve 19 by glue. A striker 21 is provided on the side of the pillar 15 facing the collision plate 11. The input end of the striker 21 is connected to the output end of the probe 18 through the movable sleeve 17 through an electric wire.

[0030] It should be noted that: the mounting grooves 16 are arranged in groups of two corresponding to the terminals to be tested at a time, and there are seven groups of mounting grooves 16 arranged around the center. The support 15 is arranged axially corresponding to the mounting grooves 16. The material of the mounting tube 14 and the fixing sleeve 19 is an insulating polymer. The torsion spring 20 is as follows. Figure 6 As shown in the installation, one side of the torsion spring 20 is in close contact with the inner wall of the installation groove 16.

[0031] A further benefit of adopting the above method is that the servo motor 8 is controlled by the control terminal 12 to drive the roller 10 to drive the test component to rotate intermittently toward the terminal. When the test component rolls, the probe 18 contacts the terminal of the inverter for testing. The test data is processed by the control terminal 12 and displayed on the display screen. When the test component continues to rotate, the probe 18 is blocked by the terminal, thereby driving the movable sleeve 17 to rotate and fold into the installation groove 16, so that the probe 18 can leave the test area. When the probe 18 leaves the test area, the movable sleeve 17 drives the probe 18 to reset under the action of the torsion spring 20, completing a test process and realizing the function of automatic detection.

[0032] It should be noted that the test requires a total of fourteen processes. The first process is used to collect the reference voltage. The second to seventh processes are used to test the data of the U, V, and W ports. The control terminal 12 runs the inverter to 50HZ through a preset program for subsequent testing. The eighth process is a useless process. The data of the eighth process is not recorded and displayed by the control terminal 12. The ninth to fourteenth processes are used to test the data of the U, V, and W ports at 50HZ.

[0033] Furthermore, the top of the collision plate 11 is rotatably connected to the mounting seat 9, a metal sheet 22 is fixedly installed on the surface of the collision plate 11, the bottom of the collision plate 11 is rotatably connected to a spring 23, the other end of the spring 23 is rotatably connected to the mounting seat 9, the spacing of the metal sheet 22 matches the striker 21, and the metal sheet 22 is electrically connected to the control terminal 12.

[0034] It should be noted that: the collision plate 11 is as follows Figure 7 Tilt setting shown.

[0035] A further advantage of adopting the above method is that when the test component rotates intermittently, the striker 21 contacts the collision plate 11, and a test circuit is formed by the probe 18, the striker 21, the metal plate, and the control terminal 12. When the striker 21 leaves, the collision plate 11 is squeezed so that the collision plate 11 rotates and folds along the mounting seat 9 to allow the striker 21 to pass. After the striker 21 passes, the collision plate 11 drives the metal plate to reset under the elastic force of the spring 23.

[0036] When the utility model is used, the frequency converter is placed between the baffles 2 so that the side with the port contacts the bracket 7, and the control terminal 12 is started to start the test process. The control terminal 12 controls the clamping motor 6 to drive the screw rod 5 to rotate according to the preset data. When the screw rod 5 rotates, it drives the clamping plate 4 to move along the slide bar 13 toward the baffle 2. When the set value is reached, the operation stops, and the frequency converter is limited by the baffle 2 and the clamping plate 4.

[0037] During the test, the control terminal 12 controls the servo motor 8 to drive the roller 10 to drive the installation cylinder 14 to rotate intermittently toward the terminal, and the probe 18 contacts the terminal of the inverter, and the striker 21 contacts the collision plate 11. A test circuit is formed through the probe 18, the striker 21, the metal plate, and the control terminal 12. The test data is processed by the control terminal 12 and displayed on the display screen. When the installation cylinder 14 continues to rotate, the probe 18 is blocked by the terminal, thereby driving the movable sleeve 17 to rotate and fold into the installation groove 16, so that the probe 18 can leave the test area. When the probe 18 leaves the test area, the movable sleeve 17 drives the probe 18 to reset under the action of the torsion spring 20. When the striker 21 leaves, the squeeze Press the collision plate 11 so that it rotates and folds along the mounting seat 9 to allow the striker 21 to pass through. After the striker 21 passes through, the collision plate 11 drives the metal plate to reset under the elastic force of the spring 23, completing a test process and realizing the automatic detection function. The test requires a total of fourteen processes. The first process is used to collect the reference voltage, and the second to seventh processes are used to test the data of the U, V, and W ports. The control terminal 12 runs the inverter to 50HZ through a preset program for subsequent testing. The eighth process is a useless process, and the data of the eighth process is not recorded and displayed by the control terminal 12. The ninth to fourteenth processes are used to test the data of the U, V, and W ports at 50HZ.

[0038] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A test device for inverter maintenance, comprising a base plate (1), characterized in that: The surface of the base plate (1) is provided with a baffle (2) and a slide groove (3), a clamping plate (4) is provided between the baffles (2), a screw rod (5) is provided at one end of the baffle (2), one end of the screw rod (5) is rotatably connected to the baffle (2), the other end of the screw rod (5) passes through the clamping plate (4) and is rotatably connected to a clamping motor (6), a bracket (7) is provided at one end of the base plate (1), a servo motor (8) and a mounting seat (9) are relatively provided on the top of the bracket (7), the output end of the servo motor (8) is rotatably connected to a roller (10), the other end of the roller (10) is rotatably connected to the mounting seat (9), a test assembly is provided on the outer wall of the roller (10), a collision plate (11) is installed on one side of the mounting seat (9) corresponding to the test assembly, and a control terminal (12) is provided on the side of the base plate (1) close to the collision plate (11).

2. A test device for inverter maintenance according to claim 1, characterized in that: A slide rod (13) is provided in the slide groove (3), and the bottom of the clamping plate (4) is slidably connected to the slide rod (13) via a slider.

3. The inverter maintenance test device according to claim 1, characterized in that: The test assembly comprises a mounting cylinder (14), both ends of the interior of the mounting cylinder (14) are fixedly connected with pillars (15), the mounting cylinder (14) is fixedly connected to the outer wall of the roller (10) via the pillars (15), and the outer wall of the mounting cylinder (14) is provided with a mounting groove (16) matching the inverter terminal.

4. A test device for inverter maintenance according to claim 3, characterized in that: The installation grooves (16) surround the installation cylinder (14) at intervals corresponding to the test sequence of the frequency converter, and a through hole is provided at one end of the installation grooves (16).

5. A test device for inverter maintenance according to claim 4, characterized in that: A movable sleeve (17) is rotatably connected in the mounting groove (16), a probe (18) is fixedly installed at the input end of the movable sleeve (17), a fixed sleeve (19) is provided on one side of the movable sleeve (17), a torsion spring (20) is provided at the rotating shaft of the movable sleeve (17), and one end of the torsion spring (20) is bonded to the fixed sleeve (19) by glue.

6. A test device for inverter maintenance according to claim 5, characterized in that: A striker (21) is provided on one side of the support (15) facing the collision plate (11), and an input end of the striker (21) is connected to an output end of the probe (18) through an electric wire passing through a movable sleeve (17).

7. The inverter maintenance test device according to claim 1, characterized in that: The top end of the collision plate (11) is rotatably connected to the mounting seat (9), a metal sheet (22) is fixedly mounted on the surface of the collision plate (11), the bottom end of the collision plate (11) is rotatably connected to a spring (23), and the other end of the spring (23) is rotatably connected to the mounting seat (9).

8. The inverter maintenance test device according to claim 7, characterized in that: The spacing of the metal sheet (22) matches the striker (21), and the metal sheet (22) is electrically connected to the control terminal (12).