A permanent magnet synchronous motor testing device and method

Abstract

The present invention relates to the field of motor testing technology, and in particular to a permanent magnet synchronous motor testing device and method thereof. The device comprises a test bench and a permanent magnet synchronous motor, and a load dynamometer mounted on the test bench. A transmission box is mounted on the test bench via bolts, a main helical gear is rotatably connected to the inner side of the transmission box, a connecting shaft is fixedly connected between the side wall of the main helical gear and the output end of the load dynamometer, a base is fixedly connected to the inner bottom end of the transmission box, and a rotating shaft is rotatably connected to the base. The present invention arranges structures such as the rotating shaft, the electromagnetic tooth clutch, and the main helical gear, so that when one of the permanent magnet synchronous motors is tested, the permanent magnet synchronous motor to be tested can be installed on the other side of the transmission box. After the test of the previous permanent magnet synchronous motor is completed, the rapid conversion of the tested permanent magnet synchronous motor can be completed by controlling the closing of the corresponding electromagnetic tooth clutch, so that when the motor is tested, another motor can be installed and leveled, saving a lot of installation time.

Description

Technical Field

[0001] The present invention relates to the technical field of motor testing, and in particular to a permanent magnet synchronous motor testing device and method. Background Art

[0002] The permanent magnet synchronous motor load test device is a device specifically used to evaluate the performance of permanent magnet synchronous motors. By simulating actual working conditions, the device accurately measures key performance indicators such as the motor's speed, torque, efficiency, and temperature rise. It usually includes a test platform, a dynamometer, a sensor system, a data acquisition and analysis system, and control software. This device can realize automated testing processes, reduce manual operations, and improve testing efficiency and accuracy. In addition, it also has an energy feedback function, which feeds the energy generated during the test back to the power grid to achieve energy saving and consumption reduction. This test device is widely used in many fields such as motor research and development, quality control, and product certification, and is an indispensable key equipment in the motor manufacturing industry.

[0003] In the field of permanent magnet synchronous motor testing, existing testing equipment usually requires manual operation to complete the correction and installation of the motor and coupling. This process is not only time-consuming and labor-intensive, but also seriously affects the test efficiency. In addition, when installing the motor, existing equipment often requires workers to fix the motor to the platform with bolts. This step is also time-consuming and inefficient, and is not conducive to quickly switching to test different motors. Therefore, the main defects in the existing technology include insufficient automation, low installation efficiency, difficulty in ensuring test accuracy and repeatability, and insufficient versatility and interchangeability.

[0004] Therefore, a permanent magnet synchronous motor testing device and method are proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a permanent magnet synchronous motor testing device and method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a permanent magnet synchronous motor testing device, comprising a test bench and a permanent magnet synchronous motor, and a load dynamometer installed on the test bench, wherein a transmission box is installed on the test bench by bolts, a main helical gear is rotatably connected to the inside of the transmission box, a connecting shaft is fixedly connected between the side wall of the main helical gear and the output end of the load dynamometer, a base is fixedly connected to the bottom end of the transmission box, a rotating shaft is rotatably connected to the base, a slave helical gear that meshes with the main helical gear is fixedly connected to the outer wall of the rotating shaft, an electromagnetic tooth clutch is fixedly connected on both sides of the outer wall of the rotating shaft, a coupling is rotatably connected on both sides of the outer wall of the transmission box, and the adjacent sides of the coupling are fixedly connected to the disconnected end of the electromagnetic tooth clutch through the inside of the transmission box, the test bench is also provided with a locking mechanism for automatically locking the permanent magnet synchronous motor, and the front and rear sides of the test bench are fixedly connected to adjustment seats for lateral and longitudinal adjustment, the side walls of the adjustment seat are provided with fixing plates, and an adjustment mechanism for adjusting the level of the permanent magnet synchronous motor is also provided.

[0007] In the above technical solution, further, the locking mechanism includes an electric telescopic cylinder, and the electric telescopic cylinder is provided with a pair. The side walls of the fixed plate are fixedly connected to the mounting hole position of the permanent magnet synchronous motor with an insertion rod, and the side walls of the fixed plate are provided with grooves relative to the position next to the insertion rod, and the inner sides of the grooves are slidably connected with L-shaped locking blocks, and each pair of the locking block side walls are fixedly connected with a connecting plate, and the rear side of the fixed plate is fixedly connected with a fixing frame, and the electric telescopic cylinders are fixedly connected to the side walls of the fixing frame, and the output end of the electric telescopic cylinder is fixedly connected to an I-shaped frame through the inner side of the fixing frame, and the side walls of the connecting plate are provided with a pair of extrusion grooves, and the side walls of the I-shaped frame are fixedly connected with a right-angle block with an inclined surface relative to the position next to the extrusion groove.

[0008] In the above technical solution, further, a spring is fixedly connected between the inner side of the groove and the side wall of the locking block, and a sliding groove is provided on the side wall of the locking block relative to the position next to the insertion rod.

[0009] In the above technical solution, further, the inner side of the extrusion groove is inclined, and the inclined surface of the extrusion groove has the same inclination angle as the inclined surface of the right-angle block, and the side walls of the fixed plate are provided with through grooves relative to the positions next to the right-angle block.

[0010] In the above technical solution, further, the side walls of the fixing plate are fixedly connected with sponge pads at positions relative to the outer sides of the insertion rod, and the side ends of the locking blocks are inclined.

[0011] In the above technical solution, further, the adjustment mechanism includes a screw, a circular groove is opened through the side wall of the adjustment seat, a rotating ring is rotatably connected to the inner side of the circular groove, two pairs of screws are provided, each pair of screws is threadedly connected to the rotating ring, a circular plate is provided next to the permanent magnet synchronous motor, a connecting frame is fixedly connected between the circular plate and the fixed plate, an annular groove is opened on the side wall of the circular plate, a circular ring is rotatably connected to the inner side of the annular groove, a pair of hinged blocks are fixedly connected to the side wall of the circular ring, the side ends of the screws are rotatably connected to the hinge frame, and the hinge blocks are rotatably connected to the inner side of the hinge frame.

[0012] In the above technical solution, further, upper thread grooves are equidistantly opened on the inner side of the annular groove, and a limiting bolt is threadedly connected through the side wall of the annular ring, and the side end of the limiting bolt is threadedly connected to the inner side of one of the upper thread grooves.

[0013] In the above technical solution, further, the side wall of the rotating ring is fixedly connected to a positioning plate, the side wall of the adjustment seat is provided with several lower thread grooves equidistantly relative to the outer side of the circular groove, the side wall of the positioning plate is threadedly connected with a positioning bolt, and the positioning bolt is threadedly connected to the inner side of one of the lower thread grooves.

[0014] A permanent magnet synchronous motor testing method comprises the following steps:

[0015] Step 1: Install the permanent magnet synchronous motor by placing it on the side wall of the fixed plate and locking it with the locking mechanism, and then connect the output end of the permanent magnet synchronous motor to the coupling;

[0016] Step 2: Leveling, and then adjusting the level between the permanent magnet synchronous motor and the coupling through the adjustment mechanism;

[0017] Step 3: Test, which involves controlling the corresponding electromagnetic dog clutch to start, connecting the rotating shaft to the installed permanent magnet synchronous motor, and then connecting the permanent magnet synchronous motor to a power supply for starting. Under the transmission of the rotating shaft, the slave helical gear, the master helical gear, and the connecting shaft, the force is transmitted to the load dynamometer, and a load test can be performed.

[0018] Step 4: Synchronous installation. During the test, the permanent magnet synchronous motor to be tested is installed on the fixed plate on the other side in the same way as above. After the test of the previous permanent magnet synchronous motor is completed, the rapid conversion of the permanent magnet synchronous motor can be completed by controlling the closing of the corresponding electromagnetic tooth clutch.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention, through the arrangement of structures such as a rotating shaft, an electromagnetic tooth clutch, and a main helical gear, can install the permanent magnet synchronous motor to be tested on the other side of the transmission case when one permanent magnet synchronous motor is tested. After the test of the previous permanent magnet synchronous motor is completed, the test permanent magnet synchronous motor can be quickly switched by controlling the closing of the corresponding electromagnetic tooth clutch. Therefore, when the motor is tested, the other motor can be installed and leveled, saving a lot of installation time.

[0021] 2. The present invention can automatically lock the position of the permanent magnet synchronous motor through the setting of the locking mechanism, without the need for workers to use tools to tighten multiple bolts for fixing, further improving the installation efficiency of the device. At the same time, through the setting of the adjustment mechanism, the position of the permanent magnet synchronous motor can be quickly adjusted and locked when the permanent magnet synchronous motor is docked with the coupling, thereby ensuring the horizontal installation between the permanent magnet synchronous motor and the coupling, without the need for workers to frequently disassemble the motor limit for adjustment, further improving the installation efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front three-dimensional structure of the testing device of the present invention;

[0023] Figure 2 The appended Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0024] Figure 3 It is a rear perspective structural diagram of the testing device of the present invention;

[0025] Figure 4 This is a schematic diagram of the overall appearance of the load dynamometer, connecting shaft and transmission box of the present invention;

[0026] Figure 5 It is a schematic diagram of the partial appearance of the main helical gear, the slave helical gear and the rotating shaft of the present invention;

[0027] Figure 6 It is a schematic diagram of the side three-dimensional structure of the fixing plate and the adjustment seat of the present invention;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the I-shaped frame, the fixing plate, the connecting plate and the permanent magnet synchronous motor separated according to the present invention;

[0029] Figure 8 This is a schematic diagram of the overall appearance of the connecting plate of the present invention;

[0030] Figure 9 This is a schematic diagram of the three-dimensional structure of the adjustment seat and the fixing plate separated according to the present invention;

[0031] Figure 10 It is a schematic diagram of the separated three-dimensional structure of the circular plate, circular ring and rotating ring of the present invention.

[0032] In the figure: 1. test bench; 2. load dynamometer; 3. transmission box; 4. main helical gear; 5. connecting shaft; 6. base; 7. rotating shaft; 8. slave helical gear; 9. electromagnetic tooth clutch; 10. coupling; 11. permanent magnet synchronous motor; 12. electric telescopic cylinder; 13. adjusting seat; 14. fixing plate; 15. plug rod; 16. groove; 17. locking block; 18. spring; 19. connecting plate; 20. fixing frame; 21. I-beam frame; 22. extrusion groove; 23. right-angle block; 24. slide groove; 25. sponge pad; 26. through groove; 27. screw; 28. circular groove; 29. ​​rotating ring; 30. circular plate; 31. connecting frame; 32. circular ring; 33. hinge block; 34. hinge frame; 35. upper thread groove; 36. positioning plate; 37. lower thread groove; 38. positioning bolt; 39. limit bolt. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] In actual use, it is found that existing testing devices usually have some limitations in efficiency and flexibility. In particular, when performing batch testing or multi-motor testing, these devices can usually only test a single motor and need to be disassembled and reassembled after each test. This process is not only time-consuming, but also increases the complexity of the operation, thereby affecting the overall production efficiency and test accuracy. To solve the above problems, the following structure is specially invented.

[0036] like Figures 1-10A permanent magnet synchronous motor test device shown in the figure includes a test bench 1 and a permanent magnet synchronous motor 11, and a load dynamometer 2 installed on the test bench 1. The working principle of the load dynamometer 2 is mainly based on the load simulation principle and the power measurement principle. The device simulates the actual working load of the motor through a controllable load device, thereby measuring the output power, efficiency and performance parameters of the motor under different load conditions. A transmission box 3 is installed on the test bench 1 by bolts. The main helical gear 4 is rotatably connected to the inside of the transmission box 3. A connecting shaft 5 is fixedly connected between the side wall of the main helical gear 4 and the output end of the load dynamometer 2. The bottom end of the transmission box 3 is fixedly connected to a base 6. A rotating shaft 7 is rotatably connected to the base 6. The outer wall of the rotating shaft 7 is fixedly connected to a slave gear that meshes with the main helical gear 4. Helical gear 8, both sides of the outer wall of the rotating shaft 7 are fixedly connected with an electromagnetic tooth clutch 9, both sides of the outer wall of the transmission box 3 are rotatably connected with a coupling 10, and the side close to the coupling 10 passes through the inner side of the transmission box 3 and is fixedly connected to the disconnected end of the electromagnetic tooth clutch 9. The test bench 1 is also provided with a locking mechanism for automatically locking the permanent magnet synchronous motor 11, and the front and rear sides of the test bench 1 are fixedly connected with an adjustment seat 13 for lateral and longitudinal adjustment. The adjustment seat 13 is mainly composed of a transverse screw rod, a longitudinal screw rod and other structures, which can make the adjustment seat 13 move laterally or longitudinally to adjust the position of the installed permanent magnet synchronous motor 11 to ensure the coaxiality with the coupling 10. The side walls of the adjustment seat 13 are provided with a fixed plate 14, and there is also an adjustment mechanism for adjusting the level of the permanent magnet synchronous motor 11;

[0037] When testing the permanent magnet synchronous motor 11, first install the permanent magnet synchronous motor 11 on the fixed plate 14 through the locking mechanism, and then install the output end of the permanent magnet synchronous motor 11 horizontally with the coupling 10. During this process, the level of the permanent magnet synchronous motor 11 can be adjusted by the adjustment mechanism to ensure coaxial installation with the coupling 10. After the installation is completed, the corresponding electromagnetic tooth clutch 9 can be controlled to start and close, thereby realizing the connection between the coupling 10 and the rotating shaft 7 after installation, and then the permanent magnet synchronous motor 11 is connected to the power supply to start, thereby driving the coupling 10 to rotate, and then the rotating shaft 7 and the slave helical gear 8 are driven to rotate through the electromagnetic tooth clutch 9, and then the meshing main helical gear 4 is driven to rotate, and then under the action of the connecting shaft 5, it is transmitted to the load dynamometer 2 to realize the test of the permanent magnet synchronous motor 11;

[0038] During the test, the other permanent magnet synchronous motors 11 to be tested can be installed on the fixed plate 14 on the other side and coaxially installed on the corresponding coupling 10. Since the electromagnetic tooth clutch 9 on this side is in the open state, the rotating shaft 7 will not drive the external coupling 10 to rotate. Finally, after the test of the permanent magnet synchronous motor 11 is completed, the rapid switching of the tested permanent magnet synchronous motor 11 can be completed by controlling the closing of the corresponding electromagnetic tooth clutch 9 and controlling the opening of the electromagnetic tooth clutch 9 on the other side. Then, power can be turned on for testing. At this time, the permanent magnet synchronous motor 11 that has been tested on the other side can be removed and the permanent magnet synchronous motor 11 to be tested can be installed. This process can be repeated, which can reduce a lot of disassembly and correction time.

[0039] To sum up, through the design of the above structure, when one of the permanent magnet synchronous motors 11 is tested, the permanent magnet synchronous motor 11 to be tested can be installed on the other side of the transmission box 3, and then after the test of the previous permanent magnet synchronous motor 11 is completed, by controlling the closing of the corresponding electromagnetic tooth clutch 9, the rapid conversion of the tested permanent magnet synchronous motor 11 can be completed, so that when the motor is tested, another motor can be installed and leveled, saving a lot of installation time.

[0040] Based on the above embodiments, it was found during use that when installing a motor, existing equipment often requires workers to fix the motor to the platform with bolts. This step is also time-consuming and inefficient, and is not conducive to quickly switching and testing different motors. Therefore, the main defects in the existing technology include insufficient automation and low installation efficiency. In order to solve the above problems, the above structure has been further improved.

[0041] The locking mechanism includes an electric telescopic cylinder 12, which is provided with a pair of electric telescopic cylinders 12. The side walls of the fixed plate 14 are fixedly connected to the mounting hole positions of the permanent magnet synchronous motor 11 with an insertion rod 15. The side walls of the fixed plate 14 are provided with grooves 16 relative to the positions next to the insertion rod 15. L-shaped locking blocks 17 are slidably connected to the inner sides of the grooves 16. The side walls of each pair of locking blocks 17 are fixedly connected to a connecting plate 19. The rear side of the fixed plate 14 is fixedly connected to a fixing frame 20. The electric telescopic cylinders 12 are fixedly connected to the side walls of the fixing frame 20. The output end of the electric telescopic cylinder 12 is fixedly connected to an I-shaped frame 21 through the inner side of the fixing frame 20. A pair of extrusion grooves 22 are provided on the side walls of the connecting plate 19. The side walls of the I-shaped frame 21 are fixedly connected to a right-angle block 23 with an inclined surface relative to the positions next to the extrusion grooves 22.

[0042] A spring 18 is fixedly connected between the inner side of the groove 16 and the side wall of the lock block 17. Through the setting of the spring 18, the lock block 17 can be quickly pulled to reset when the squeeze of the lock block 17 is released. A sliding groove 24 is provided on the side wall of the lock block 17 relative to the position next to the insertion rod 15. The setting of the sliding groove 24 prevents the insertion rod 15 from affecting the lock block 17 from completely moving to the mounting leg of the permanent magnet synchronous motor 11, thereby affecting the locking and fixing of the permanent magnet synchronous motor 11;

[0043] The inner side of the extrusion groove 22 is inclined, and the inclined surface of the extrusion groove 22 is inclined at the same angle as the inclined surface of the right-angle block 23. A through groove 26 is provided on the side wall of the fixing plate 14 relative to the right-angle block 23. The through groove 26 is provided to avoid obstruction to the normal sliding of the right-angle block 23.

[0044] The side walls of the fixing plate 14 are fixedly connected to the outer sides of the insertion rod 15 with sponge pads 25. The side ends of the locking blocks 17 are arranged at an angle. The arrangement of the sponge pads 25 facilitates the raising of the permanent magnet synchronous motor 11. When the locking block 17 is subsequently moved, the inclined surface of the locking block 17 can be used to squeeze the corners of the mounting legs of the permanent magnet synchronous motor 11, thereby squeezing the mounting legs of the permanent magnet synchronous motor 11 onto the sponge pads 25. Subsequently, the inclined surface of the locking block 17 slides out from the corners of the mounting legs, thereby tightly squeezing the mounting legs of the permanent magnet synchronous motor 11 onto the fixing plate 14.

[0045] When installing the permanent magnet synchronous motor 11, first insert the mounting legs of the permanent magnet synchronous motor 11 on the insertion rod 15, then control the electric telescopic cylinder 12 to start and drive the I-shaped frame 21 to move, and at the same time drive the four right-angle blocks 23 to move (the initial right-angle blocks 23 are inserted in the extrusion groove 22). Since the connecting plate 19 and the locking block 17 can only be in the groove 16, the inclined surface of the right-angle block 23 pushes the inclined surface of the extrusion groove 22, which will cause the connecting plate 19 and the locking block 17 to move to the middle, and at the same time stretch the spring 18. Since the mounting legs of the permanent magnet synchronous motor 11 are on the sponge pad at this time Under the action of 25, it is in an expanded state, and then the inclined surface of the locking block 17 will squeeze the corner of the permanent magnet synchronous motor 11 mounting leg, pushing the mounting leg to the side of the fixed plate 14, and then the inclined surface of the locking block 17 moves out from the corner of the mounting leg, and the plane of the locking block 17 moves to the side wall of the mounting leg. At the same time, the slide groove 24 moves to the outside of the insertion rod 15, and then the permanent magnet synchronous motor 11 supporting leg is tightly squeezed against the side wall of the fixed plate 14, thereby completing the rapid locking and fixing of the permanent magnet synchronous motor 11. Finally, after the test is completed, the electric telescopic cylinder 12 is controlled to reset, and the above operation is repeated in reverse.

[0046] In summary, through the design of the above structure, the position of the permanent magnet synchronous motor 11 can be automatically locked without the need for workers to use tools to tighten multiple bolts for fixing, thereby further improving the installation efficiency of the device.

[0047] Based on the above embodiments, it was found during use that some test equipment usually requires manual and frequent movement of the permanent magnet synchronous motor 11 to complete the correction and installation of the motor and the coupling 10. This process is not only time-consuming and labor-intensive, but also seriously affects the test efficiency. In order to solve the above problems, the above structure has been further improved.

[0048] The adjustment mechanism includes a screw 27, a circular groove 28 is formed through the side wall of the adjustment seat 13, and a rotating ring 29 is rotatably connected to the inner side of the circular groove 28. Two pairs of screws 27 are provided, and each pair of screws 27 is threadedly connected to the rotating ring 29. A circular plate 30 is provided next to the permanent magnet synchronous motor 11, and a connecting frame 31 is fixedly connected between the circular plate 30 and the fixed plate 14. An annular groove is formed on the side wall of the circular plate 30, and a circular ring 32 is rotatably connected to the inner side of the annular groove. A pair of hinge blocks 33 are fixedly connected to the side wall of the circular ring 32. The side ends of the screws 27 are rotatably connected to the hinge frame 34, and the hinge block 33 is rotatably connected to the inner side of the hinge frame 34;

[0049] After the permanent magnet synchronous motor 11 is fixed on the fixed plate 14, when it needs to be connected to the coupling 10, first install the driven end of the coupling 10 on the output end of the permanent magnet synchronous motor 11 (it should be noted that the coupling 10 consists of three parts, namely the active end, the driven end and the elastic component, and the active end is fixedly connected to the electromagnetic tooth clutch 9), and place the elastic component between the active end and the driven end, and clamp the active end and the driven end together, but do not completely lock them. Use a dial indicator or corresponding tool to measure the coaxiality. If there is any deviation, push the hinge frame 34 and the hinge block 33 to move by rotating the screw 27 in the corresponding direction. At this time, the ring 32 drives the unadjusted hinge block 33 at the other end to move in the hinge frame 3 4 is flipped, and at the same time, the circular plate 30, the connecting frame 31 and the fixed plate 14 are flipped, thereby adjusting the inclination angle of the permanent magnet synchronous motor 11, thereby ensuring that the driven end and the driving end are parallel, reducing the influence of the installation accuracy on the test structure of the permanent magnet synchronous motor 11, if there is a deviation between the permanent magnet synchronous motor 11 and the driving end of the coupling 10 in the horizontal or vertical direction, the horizontal or vertical position of the permanent magnet synchronous motor 11 can be adjusted by the adjustment seat 13, if you want to adjust the spacing between the permanent magnet synchronous motor 11 and the coupling 10, you can simultaneously unscrew the screw 27 and pull the ring 32 for adjustment, thereby ensuring the coaxiality of the connection between the two, and finally, after the adjustment is completed, lock the connection between the driving end and the driven end.

[0050] In order to increase the adjustment range of the device, upper thread grooves 35 are equidistantly opened on the inner side of the annular groove. A limit bolt 39 is threadedly connected to the side wall of the ring 32. The side end of the limit bolt 39 is threadedly connected to the inner side of one of the upper thread grooves 35. The arrangement of the upper thread grooves 35 and the limit bolt 39 can limit the rotation position of the circular plate 30.

[0051] A positioning plate 36 is fixedly connected to the side wall of the rotating ring 29. A plurality of lower threaded grooves 37 are formed on the side wall of the adjusting seat 13 at equal distances from the outside of the circular groove 28. A positioning bolt 38 is threadedly connected to the side wall of the positioning plate 36. The positioning bolt 38 is threadedly connected to the inner side of one of the lower threaded grooves 37.

[0052] When it is necessary to adjust the inclination direction of other angles of the permanent magnet synchronous motor 11, first unscrew the limit bolt 39 so that the limit bolt 39 is unscrewed from the upper thread groove 35, thereby releasing the rotation restriction of the ring 32 (at this time, the driven end of the permanent magnet synchronous motor 11 is inserted into the active end and is restricted, so that the fixed plate 14 will not drive the circular plate 30 to flip downward), and then unscrew the positioning bolt 38 from the lower thread groove 37 to release the rotation restriction of the rotating ring 29, so that the positioning plate 36 can be pushed to drive the positioning bolt 38, the rotating ring 29 and the ring 32 to rotate, changing the position of the screw 27, and rotating the screw 27 to the position to be adjusted. The positioning bolt 38 and the limit bolt 39 can be reversed so that the positioning bolt 38 and the limit bolt 39 are threadedly connected to the corresponding upper thread groove 35 and lower thread groove 37, thereby restricting the positions of the rotating ring 29 and the ring 32, and the corresponding screw 27 can be rotated to adjust the inclination angle of the permanent magnet synchronous motor 11.

[0053] To sum up, through the design of the above structure, the position of the permanent magnet synchronous motor 11 after locking can be quickly adjusted when the permanent magnet synchronous motor 11 is docked with the coupling 10, thereby ensuring the horizontal installation between the permanent magnet synchronous motor 11 and the coupling 10. There is no need for workers to frequently disassemble the motor limit for adjustment, further improving the installation efficiency of the device.

[0054] A permanent magnet synchronous motor testing method comprises the following steps:

[0055] Step 1: Installation: Place the permanent magnet synchronous motor 11 on the side wall of the fixed plate 14 and lock it with the locking mechanism. Then connect the output end of the permanent magnet synchronous motor 11 to the coupling 10.

[0056] Step 2: Leveling: Use the adjustment mechanism to adjust the level between the permanent magnet synchronous motor 11 and the coupling 10;

[0057] Step 3: Test. The corresponding electromagnetic tooth clutch 9 can be controlled to start, so that the rotating shaft 7 is connected to the installed permanent magnet synchronous motor 11. Then, the permanent magnet synchronous motor 11 is connected to the power supply to start. Under the transmission of the rotating shaft 7, the slave helical gear 8, the main helical gear 4 and the connecting shaft 5, the force is transmitted to the load dynamometer 2, and the load test can be carried out.

[0058] Step 4: Synchronous installation. During the test, the subsequent permanent magnet synchronous motor 11 to be tested is installed on the fixed plate 14 on the other side in the same way as above. After the test of the previous permanent magnet synchronous motor 11 is completed, the rapid conversion of the tested permanent magnet synchronous motor 11 can be completed by controlling the closing of the corresponding electromagnetic tooth clutch 9.

[0059] The basic principles, main features and advantages of the present invention are shown and described above.

[0060] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A permanent magnet synchronous motor testing device, comprising a test bench (1), a permanent magnet synchronous motor (11), and a load dynamometer (2) mounted on the test bench (1), characterized in that: The test bench (1) is provided with a transmission box (3) by means of bolts. A main helical gear (4) is rotatably connected to the inside of the transmission box (3). A connecting shaft (5) is fixedly connected between the side wall of the main helical gear (4) and the output end of the load dynamometer (2). A base (6) is fixedly connected to the bottom end of the transmission box (3). A rotating shaft (7) is rotatably connected to the base (6). A slave helical gear (8) meshing with the main helical gear (4) is fixedly connected to the outer wall of the rotating shaft (7). Electromagnetic tooth clutches are fixedly connected to both sides of the outer wall of the rotating shaft (7). (9), both sides of the outer wall of the transmission box (3) are rotatably connected with couplings (10), and the adjacent sides of the couplings (10) pass through the inner side of the transmission box (3) and are fixedly connected to the disconnected end of the electromagnetic tooth clutch (9), and the test bench (1) is also provided with a locking mechanism for automatically locking the permanent magnet synchronous motor (11), and the front and rear sides of the test bench (1) are fixedly connected with adjustment seats (13) for lateral and longitudinal adjustment, and the side walls of the adjustment seats (13) are provided with fixing plates (14), and are also provided with an adjustment mechanism for adjusting the level of the permanent magnet synchronous motor (11).

2. A permanent magnet synchronous motor testing device according to claim 1, characterized in that: The locking mechanism includes an electric telescopic cylinder (12), a pair of electric telescopic cylinders (12) are provided, the side walls of the fixing plate (14) are fixedly connected to the position of the mounting hole of the permanent magnet synchronous motor (11), the side walls of the fixing plate (14) are provided with a slot (16) at a position next to the slot (15), the inner side of the slot (16) is slidably connected to an L-shaped locking block (17), and the side walls of each pair of the locking blocks (17) are fixedly connected to a connecting plate (19). ), the rear side of the fixed plate (14) is fixedly connected to a fixed frame (20), the electric telescopic cylinders (12) are fixedly connected to the side walls of the fixed frame (20), the output end of the electric telescopic cylinder (12) passes through the inner side of the fixed frame (20) and is fixedly connected to an I-shaped frame (21), the side walls of the connecting plate (19) are each provided with a pair of extrusion grooves (22), and the side walls of the I-shaped frame (21) are each fixedly connected to a right-angle block (23) with an inclined surface at a position adjacent to the extrusion grooves (22).

3. A permanent magnet synchronous motor testing device according to claim 2, characterized in that: A spring (18) is fixedly connected between the inner side of the groove (16) and the side wall of the locking block (17), and a sliding groove (24) is provided on the side wall of the locking block (17) relative to the insertion rod (15).

4. A permanent magnet synchronous motor testing device according to claim 2, characterized in that: The inner side of the extrusion groove (22) is inclined, and the inclined surface of the extrusion groove (22) has the same inclination angle as the inclined surface of the right-angle block (23). The side wall of the fixing plate (14) is provided with a through groove (26) at a position next to the right-angle block (23).

5. A permanent magnet synchronous motor testing device according to claim 2, characterized in that: The side walls of the fixing plate (14) are fixedly connected with sponge pads (25) at positions outside the insertion rod (15), and the side ends of the locking blocks (17) are arranged at an angle.

6. A permanent magnet synchronous motor testing device according to claim 1, characterized in that: The adjustment mechanism includes a screw (27), a circular groove (28) is formed through the side wall of the adjustment seat (13), a rotating ring (29) is rotatably connected to the inner side of the circular groove (28), two pairs of screws (27) are provided, and each pair of screws (27) is threadedly connected to the rotating ring (29), a circular plate (30) is provided next to the permanent magnet synchronous motor (11), a connecting frame (31) is fixedly connected between the circular plate (30) and the fixed plate (14), an annular groove is formed on the side wall of the circular plate (30), a circular ring (32) is rotatably connected to the inner side of the annular groove, and a pair of hinge blocks (33) are fixedly connected to the side wall of the circular ring (32), the side ends of the screws (27) are rotatably connected to the hinge frame (34), and the hinge block (33) is rotatably connected to the inner side of the hinge frame (34).

7. A permanent magnet synchronous motor testing device according to claim 6, characterized in that: Upper thread grooves (35) are equidistantly formed on the inner side of the annular groove, and a limit bolt (39) is threadedly connected to the side wall of the ring (32), and the side end of the limit bolt (39) is threadedly connected to the inner side of one of the upper thread grooves (35).

8. The permanent magnet synchronous motor testing device according to claim 6, characterized in that: The side wall of the rotating ring (29) is fixedly connected with a positioning plate (36), and the side wall of the adjusting seat (13) is provided with a plurality of lower thread grooves (37) at equal distances relative to the outer side of the circular groove (28). A positioning bolt (38) is threadedly connected through the side wall of the positioning plate (36), and the positioning bolt (38) is threadedly connected to the inner side of one of the lower thread grooves (37).

9. A permanent magnet synchronous motor testing method, the method being applicable to the permanent magnet synchronous motor testing device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Installation: Place the permanent magnet synchronous motor (11) on the side wall of the fixed plate (14), lock and fix it with the locking mechanism, and then connect the output end of the permanent magnet synchronous motor (11) to the coupling (10); Step 2: Leveling, and then adjusting the level between the permanent magnet synchronous motor (11) and the coupling (10) by the adjustment mechanism; Step 3: Testing, which involves controlling the corresponding electromagnetic tooth clutch (9) to start, connecting the rotating shaft (7) to the installed permanent magnet synchronous motor (11), and then connecting the permanent magnet synchronous motor (11) to a power supply for starting. The force is transmitted to the load dynamometer (2) through the rotating shaft (7), the slave helical gear (8), the master helical gear (4), and the connecting shaft (5), and a load test can be performed. Step 4: Synchronous installation. During the test, the permanent magnet synchronous motor (11) to be tested subsequently is installed on the fixing plate (14) on the other side in the same manner as above. After the test of the previous permanent magnet synchronous motor (11) is completed, the rapid conversion of the permanent magnet synchronous motor (11) can be completed by controlling the closing of the corresponding electromagnetic tooth clutch (9).

Images