Permanent magnet synchronous motor on-load test tool

Abstract

The utility model belongs to the technical field of test tools, and discloses a permanent magnet synchronous motor on-load test tool, which comprises a test tool table provided with a test mechanism; the testing mechanism comprises a first hydraulic cylinder, a push plate, a sliding plate, a connecting plate, a shielding frame, a magnetic powder brake, a torsion sensor, a load shaft, a side plate, a second hydraulic cylinder, a moving plate and a T-shaped block. A storage groove is formed in the top of the testing tool table, the first hydraulic cylinder is fixedly installed on the inner wall of the bottom of the storage groove, a hydraulic rod of the first hydraulic cylinder is fixedly connected with the push plate, the sliding plate is slidably installed on the push plate, and the top of the sliding plate is fixedly connected with the connecting plate. The magnetic powder brake, the torsion sensor and the shielding frame are all fixedly installed on the connecting plate, and the load shaft is installed on the magnetic powder brake and the torsion sensor. The utility model has the following advantages and effects: butt joint with the load shaft is convenient and fast, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing tools, and in particular relates to a permanent magnet synchronous motor load testing tool. Background Art

[0002] Permanent magnet synchronous motors improve the reliability of motor operation; they are favored by the market because they do not require excitation current and have no excitation loss, which improves the efficiency and power density of the motor. Some special environments require strict torque parameters, so it is important to detect the torque size of the permanent magnet synchronous motor under load.

[0003] The prior art has a publication number of CN214310800U that discloses a permanent magnet synchronous motor load test fixture, wherein the test fixture comprises a fixture permanent magnet synchronous motor, the permanent magnet synchronous motor under test is connected to a power supply via a power cord, the output end of the permanent magnet synchronous motor under test is connected to the fixture permanent magnet synchronous motor via a coupling, and when the permanent magnet synchronous motor under test is energized and rotated, it drives the fixture permanent magnet synchronous motor to rotate, and the fixture permanent magnet synchronous motor has a three-phase winding, and the three-phase windings are respectively connected to sliding rheostats.

[0004] When in use, the permanent magnet synchronous motor under test is tested by docking the fixture permanent magnet synchronous motor with the permanent magnet synchronous motor under test. However, there are various types of permanent magnet synchronous motors, and their output shafts are not convenient to dock with the load shaft quickly. Therefore, it is necessary to design a permanent magnet synchronous motor load test fixture to solve the above problem.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The utility model aims to provide a permanent magnet synchronous motor load test fixture to solve the above problems.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A permanent magnet synchronous motor load test fixture, comprising:

[0009] A test bench, wherein a test mechanism is provided on the test bench;

[0010] The testing mechanism includes a first hydraulic cylinder, a push plate, a slide plate, a connecting plate, a shielding frame, a magnetic powder brake, a torque sensor, a load shaft, a side plate, a second hydraulic cylinder, a moving plate and a T-block;

[0011] A storage groove is provided on the top of the test fixture, the first hydraulic cylinder is fixedly installed on the bottom inner wall of the storage groove, the hydraulic rod of the first hydraulic cylinder is fixedly connected to the push plate, the slide plate is slidably installed on the push plate, the top of the slide plate is fixedly connected to the connecting plate, the magnetic powder brake, the torque sensor and the shielding frame are all fixedly installed on the connecting plate, the load shaft is installed on the magnetic powder brake and the torque sensor, the side surface of the side plate is fixedly connected to the test fixture, the second hydraulic cylinder is fixedly installed on the side plate, the hydraulic rod of the second hydraulic cylinder is fixedly connected to the moving plate, the side surface of the T-block is fixedly connected to the connecting plate and the shielding frame, a T-slot is provided on the top of the moving plate, and the T-block is in sliding contact with the inner wall of the T-slot.

[0012] The utility model is further configured as follows: a rectangular groove is provided on the top of the test fixture, and the T-block is located in the rectangular groove.

[0013] The utility model is further configured as follows: a permanent magnet synchronous motor to be tested is placed on the top of the test fixture, and a mounting frame is fixedly arranged on the bottom of the permanent magnet synchronous motor to be tested.

[0014] By adopting the above technical solution, the permanent magnet synchronous motor to be tested is fixed on the test fixture by bolts.

[0015] The utility model is further configured as follows: the output end of the measured permanent magnet synchronous motor and the end of the load shaft are both fixedly provided with connecting disks, and the connecting disks are provided with mounting holes.

[0016] The utility model is further configured as follows: the shielding frame is in contact with the inner wall of the storage slot.

[0017] By adopting the above technical solution, the storage slot can be shielded, so that the test mechanism can be conveniently stored and protected when not in use.

[0018] The utility model is further configured as follows: a slide groove is provided on the top of the push plate, a guide rod is fixedly arranged in the slide groove, and the slide plate is slidably sleeved on the outer side of the guide rod.

[0019] By adopting the above technical solution, the slide plate can be easily moved horizontally on the push plate.

[0020] The utility model is further configured as follows: a slide bar is fixedly arranged at the bottom of the push plate, a cylinder is fixedly arranged on the inner wall of the bottom of the storage groove, and the slide bar is slidably installed in the cylinder.

[0021] The utility model is further configured as follows: the bottom of the movable plate is in contact with the test fixture table.

[0022] The beneficial effects of the utility model are:

[0023] The utility model starts the first hydraulic cylinder through the arranged test mechanism, and can adjust the height of the connecting disk on the load shaft, so as to facilitate the rapid alignment of the connecting disk on the load shaft with the connecting disk on the output shaft of the tested permanent magnet synchronous motor.

[0024] The utility model starts the second hydraulic cylinder through the arranged test mechanism, so that two aligned connection plates can be quickly spliced, and can be conveniently and quickly docked with the load shaft, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 and Figure 2 The utility model discloses a three-dimensional structural diagram of a permanent magnet synchronous motor load test fixture.

[0027] Figure 3 The utility model discloses a cross-sectional structural diagram of a permanent magnet synchronous motor load test fixture.

[0028] Figure 4 yes Figure 3 Schematic diagram of the structure of part A in .

[0029] In the figure, 1. test fixture; 2. permanent magnet synchronous motor to be tested; 3. mounting frame; 4. storage slot; 5. first hydraulic cylinder; 6. push plate; 7. slide plate; 8. connecting plate; 9. shielding frame; 10. magnetic powder brake; 11. torque sensor; 12. load shaft; 13. side plate; 14. second hydraulic cylinder; 15. moving plate; 16. T-block; 17. T-slot. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model provides a permanent magnet synchronous motor load test tool, comprising:

[0033] A test bench 1 is provided with a test mechanism. It should be noted that the permanent magnet synchronous motor 2 to be tested is tested by the test mechanism. An inspection plate is installed on the rear side of the test bench 1 by bolts to facilitate inspection and maintenance of the interior of the test bench 1.

[0034] The testing mechanism includes a first hydraulic cylinder 5, a push plate 6, a slide plate 7, a connecting plate 8, a shielding frame 9, a magnetic powder brake 10, a torque sensor 11, a load shaft 12, a side plate 13, a second hydraulic cylinder 14, a moving plate 15 and a T-block 16;

[0035] A storage groove 4 is provided on the top of the test fixture 1, the first hydraulic cylinder 5 is fixedly installed on the bottom inner wall of the storage groove 4, the hydraulic rod of the first hydraulic cylinder 5 is fixedly connected to the push plate 6, the slide plate 7 is slidably installed on the push plate 6, the top of the slide plate 7 is fixedly connected to the connecting plate 8, the magnetic powder brake 10, the torque sensor 11 and the shielding frame 9 are all fixedly installed on the connecting plate 8, the load shaft 12 is installed on the magnetic powder brake 10 and the torque sensor 11, the side of the side plate 13 is fixedly connected to the test fixture 1, the second hydraulic cylinder 14 is fixedly installed on the side plate 13, the hydraulic rod of the second hydraulic cylinder 14 is fixedly connected to the moving plate 15, the side of the T-block 16 is fixedly connected to the connecting plate 8 and the shielding frame 9, the top of the moving plate 15 is provided with a T-slot 17, and the T-block 16 is in sliding contact with the inner wall of the T-slot 17.

[0036] Through the above-mentioned testing mechanism, according to the installation position of the tested permanent magnet synchronous motor 2, the first hydraulic cylinder 5 is started, and the first hydraulic cylinder 5 drives the push plate 6 to move until the connection disk of the load shaft 12 and the connection disk of the tested permanent magnet synchronous motor 2 are on the same horizontal axis, and then the second hydraulic cylinder 14 is started, and the second hydraulic cylinder 14 drives the moving plate 15 to move, and the moving plate 15 drives the T-block 16 to move until the two connection disks are docked, and then the two connection disks are connected and fixed by bolts, and then the tested permanent magnet synchronous motor 2 is started, and the load shaft 12 is driven to rotate, the magnetic powder brake 10 provides the load, and the torque sensor 11 measures the torque under the load condition, which is convenient and fast to dock with the load shaft 12, thereby improving the testing efficiency.

[0037] Specifically, a rectangular groove is provided on the top of the test fixture 1 , and the T-block 16 is located in the rectangular groove. It should be noted that the rectangular groove does not affect the rightward movement of the T-block 16 .

[0038] Specifically, a permanent magnet synchronous motor 2 to be tested is placed on the top of the test fixture 1, a mounting frame 3 is fixedly provided at the bottom of the permanent magnet synchronous motor 2 to be tested, and connecting disks are fixedly provided at the output end of the permanent magnet synchronous motor 2 to be tested and the end of the load shaft 12, and mounting holes are opened on the connecting disks. It should be noted that docking is performed through two connecting disks.

[0039] Specifically, the shielding frame 9 is in contact with the inner wall of the storage slot 4. It should be noted that the storage slot 4 can be shielded to facilitate storage and protection of the test mechanism when not in use.

[0040] Specifically, a slide groove is provided on the top of the push plate 6, a guide rod is fixedly arranged in the slide groove, the slide plate 7 is slidably sleeved on the outside of the guide rod, a slide rod is fixedly arranged at the bottom of the push plate 6, a cylinder is fixedly arranged on the inner wall of the bottom of the storage groove 4, and the slide rod is slidably installed in the cylinder. It should be noted that the push plate 6 can be stably moved in the vertical direction, and the slide plate 7 can be conveniently moved stably in the horizontal direction.

[0041] Specifically, the bottom of the movable plate 15 is in contact with the test fixture 1 . It should be noted that this makes it convenient to support the movable plate 15 .

[0042] The test method includes the following steps:

[0043] S1: According to the installation position of the tested permanent magnet synchronous motor 2, the first hydraulic cylinder 5 is started, and the first hydraulic cylinder 5 drives the push plate 6 to move, so that the slide plate 7, the connecting plate 8, the shielding frame 9, the magnetic powder brake 10, the torque sensor 11, the load shaft 12 and the T-block 16 move upward synchronously until the connecting disk of the load shaft 12 and the connecting disk of the tested permanent magnet synchronous motor 2 are on the same horizontal axis;

[0044] S2: Start the second hydraulic cylinder 14, the second hydraulic cylinder 14 drives the moving plate 15 to move, the moving plate 15 drives the T-block 16 to move, so that the slide plate 7, the connecting plate 8, the shielding frame 9, the magnetic powder brake 10, the torque sensor 11 and the load shaft 12 can be synchronously moved to the right until the two connecting plates are docked, and then the two connecting plates are connected and fixed by bolts;

[0045] S3: Start the tested permanent magnet synchronous motor 2 to drive the load shaft 12 to rotate, the magnetic powder brake 10 provides the load, and the torque sensor 11 measures the torque under the load condition, so as to conveniently and quickly dock with the load shaft 12 to improve the test efficiency;

[0046] S4: After the test is completed, the test mechanism can be stored in the storage slot 4, so that the test mechanism can be stored and protected when not in use.

[0047] The above is a detailed introduction to a permanent magnet synchronous motor load test fixture provided by the utility model. This article uses specific embodiments to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A permanent magnet synchronous motor load test tool, characterized in that: include: A test fixture (1), wherein a test mechanism is arranged on the test fixture (1); The testing mechanism comprises a first hydraulic cylinder (5), a push plate (6), a slide plate (7), a connecting plate (8), a shielding frame (9), a magnetic powder brake (10), a torque sensor (11), a load shaft (12), a side plate (13), a second hydraulic cylinder (14), a moving plate (15) and a T-block (16); The top of the test fixture (1) is provided with a storage groove (4); the first hydraulic cylinder (5) is fixedly mounted on the bottom inner wall of the storage groove (4); the hydraulic rod of the first hydraulic cylinder (5) is fixedly connected to the push plate (6); the slide plate (7) is slidably mounted on the push plate (6); the top of the slide plate (7) is fixedly connected to the connecting plate (8); the magnetic powder brake (10), the torque sensor (11) and the shielding frame (9) are all fixedly mounted on the connecting plate (8); the load shaft (12) is mounted on the magnetic powder brake (10), the torque sensor (11) and the shielding frame (9) The brake (10) and the torque sensor (11) are mounted on the side plate (13), the side surface of the side plate (13) is fixedly connected to the test fixture (1), the second hydraulic cylinder (14) is fixedly mounted on the side plate (13), the hydraulic rod of the second hydraulic cylinder (14) is fixedly connected to the movable plate (15), the side surface of the T-block (16) is fixedly connected to the connecting plate (8) and the shielding frame (9), the top of the movable plate (15) is provided with a T-slot (17), and the T-block (16) is in sliding contact with the inner wall of the T-slot (17).

2. A permanent magnet synchronous motor load test fixture according to claim 1, characterized in that: A rectangular groove is provided on the top of the test fixture table (1), and the T-block (16) is located in the rectangular groove.

3. The permanent magnet synchronous motor load test fixture according to claim 1, characterized in that: A permanent magnet synchronous motor (2) to be tested is placed on the top of the test fixture (1), and a mounting frame (3) is fixedly arranged on the bottom of the permanent magnet synchronous motor (2) to be tested.

4. A permanent magnet synchronous motor load test fixture according to claim 3, characterized in that: The output end of the tested permanent magnet synchronous motor (2) and the end of the load shaft (12) are both fixedly provided with connection disks, and the connection disks are provided with mounting holes.

5. The permanent magnet synchronous motor load test fixture according to claim 1, characterized in that: The shielding frame (9) is in contact with the inner wall of the storage groove (4).

6. The permanent magnet synchronous motor load test fixture according to claim 1, characterized in that: The push plate (6) is provided with a slide groove at the top, a guide rod is fixedly arranged in the slide groove, and the slide plate (7) is slidably sleeved on the outer side of the guide rod.

7. The permanent magnet synchronous motor load test fixture according to claim 1, characterized in that: A sliding rod is fixedly arranged at the bottom of the push plate (6), and a cylinder is fixedly arranged on the inner wall of the bottom of the storage groove (4), and the sliding rod is slidably installed in the cylinder.

8. The permanent magnet synchronous motor load test fixture according to claim 1, characterized in that: The bottom of the movable plate (15) is in contact with the testing fixture table (1).

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