A testing device and method for a permanent magnet synchronous linear motor

Abstract

This invention provides a testing device and method for permanent magnet synchronous linear motors, relating to the field of magnetic variable measurement technology. The device includes a housing with a detection mechanism inside. The detection mechanism comprises a first rotating rod and a rotating disk. A rotating plate and a push rod are fixedly connected to the outer surface of the first rotating rod. A locking block is fixedly connected to the outer surface of the rotating plate. A locking groove is formed on the outer surface of the rotating disk. The locking block is slidably connected to the locking groove. This invention's unique multi-angle rotation design allows for multi-dimensional magnetic field data acquisition from irregularly shaped rotors. Analysis of the data allows for precise positioning of the magnetic shaft, ensuring high accuracy and strong adaptability in testing. Furthermore, the automated operation through mechanical linkage significantly improves testing efficiency, realizing the advantage of integrating multi-dimensional detection functions into a single device. This effectively reduces equipment investment and operational complexity, and has significant practical value for performance testing of permanent magnet synchronous linear motors, especially those with irregularly shaped rotors.

Description

Technical Field

[0001] This invention relates to the field of magnetic variable measurement technology, and in particular to a testing device and method for a permanent magnet synchronous linear motor. Background Technology

[0002] In the research and development and production of permanent magnet synchronous linear motors, the accurate detection of magnetic variables (such as magnetic field strength, magnetic shaft position, induced electromotive force, etc.) is a core aspect of evaluating motor performance, directly affecting the motor's operating efficiency, control accuracy, and service life. This is especially true for irregularly shaped rotors (such as rotors with asymmetrical structures or special magnetic pole distributions), where the distribution of magnetic variables is often irregular, posing numerous challenges to traditional detection methods. The industry's methods for detecting magnetic variables in permanent magnet synchronous linear motors largely rely on single-function equipment: for example, using Hall sensor arrays to statically scan the magnetic field strength, but this is insufficient to capture the dynamic magnetic characteristics under rotor motion; and manually adjusting the rotor angle for multi-dimensional measurements is not only inefficient. Furthermore, the angle control precision is insufficient, resulting in a large magnetic shaft positioning error. In addition, impurities such as iron filings and dust on the rotor surface require separate pretreatment with cleaning equipment, which is cumbersome and prone to secondary contamination affecting the accuracy of the test. Moreover, when the traditional "pull-up method" test is applied to irregularly shaped rotors, problems such as unstable rotor fixation and deviation of the pull-up trajectory often lead to distortion of magnetic field induction data. At the same time, existing devices mostly lack automated linkage mechanisms, and cleaning, positioning, and testing links require manual switching, which not only increases the complexity of operation and equipment investment costs, but also makes it difficult to meet the high-efficiency and accurate testing requirements in mass production. Therefore, we propose a permanent magnet synchronous linear motor testing device and method. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems by proposing a permanent magnet synchronous linear motor testing device and method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a permanent magnet synchronous linear motor testing device, comprising a housing, wherein a testing mechanism is disposed inside the housing, the testing mechanism comprising a first rotating rod and a rotating disk, a rotating plate and a push rod being fixedly connected to the outer surface of the first rotating rod, a locking block being fixedly connected to the outer surface of the rotating plate, a locking groove being formed on the outer surface of the rotating disk, the locking block being slidably connected to the locking groove, a connecting plate being rotatably connected to the outer surface of the first rotating rod via a bearing, a protrusion being fixedly connected to the lower surface of the connecting plate, the push rod contacting the protrusion, and a rotatably connected [missing information - likely a component or element] to the lower surface of the end of the connecting plate. A first pull rod is connected to a second pull rod via a bearing at its other end. A rack is fixedly connected to the outer surface of the second pull rod. A second rotating rod is rotatably connected to the inner surface of the rotating disk via a bearing. A third rotating rod is rotatably connected to the inner surface of the outer casing via a bearing. A first gear is fixedly connected to the outer surface of the second rotating rod. A second gear and a third gear are fixedly connected to the outer surface of the third rotating rod. The third gear meshes with the rack, and the second gear meshes with the first gear. A threaded rod is fixedly connected to the upper surface of the second rotating rod, and a lifting frame is fixedly connected to the outer surface of the threaded rod.

[0005] Preferably, a positioning disk is rotatably connected to the outer surface of the first rotating rod, the positioning disk is fixedly connected to the outer shell, the outer surface of the positioning disk is provided with ratchet teeth, the upper surface of the connecting plate is rotatably connected to a stop rod through a bearing, the stop rod contacts the ratchet teeth, a torsion spring is fixedly connected between the stop rod and the connecting plate, a stop rod is fixedly connected to the inner surface of the outer shell, and an elastic element is provided on the upper surface of the stop rod.

[0006] Preferably, a limiting tube is fixedly connected to the inner surface of the outer shell, the second pull rod is slidably connected to the inner surface of the limiting tube, a limiting rod is fixedly connected to the upper surface of the rotating disk, and the lifting frame is slidably connected to the limiting rod.

[0007] Preferably, a first motor is mounted on the inner surface of the housing, the output end of the first motor is fixedly connected to a first rotating rod, the rotating disk and the first rotating rod are both rotatably connected to the housing through bearings, and the central hole of the rotating disk is rotatably connected to the outer surface of the second rotating rod through bearings.

[0008] Preferably, the inner surface of the outer casing is further provided with a cleaning mechanism, the cleaning mechanism including a rotating frame, a support frame fixedly connected to the outer surface of the rotating frame, an annular rod fixedly connected to the upper surface of the support frame, a threaded groove formed on the outer surface of the annular rod, a mounting frame fixedly connected to the upper surface of the lifting frame, a movable frame slidably connected to the outer surface of the mounting frame, a mounting block fixedly connected to the outer surface of the movable frame, a rotating block rotatably connected to the inner surface of the mounting block, an arc-shaped block fixedly connected to the inner surface of the rotating block, the arc-shaped block slidably connected to the threaded groove, a connecting frame fixedly connected to the outer surface of the rotating block, and a cleaning brush rotatably connected to the outer surface of the connecting frame.

[0009] Preferably, a second motor is installed on the inner surface of the lifting frame, and a fourth rotating rod is fixedly connected to the output end of the second motor. The upper surface of the lifting frame is rotatably connected to the rotating frame through a bearing. A fifth gear is fixedly connected to both the fourth rotating rod and the outer surface of the rotating frame, and the two fifth gears are meshed together.

[0010] Preferably, the inner surface of the outer shell is further provided with a processing mechanism, the processing mechanism including a fixed frame, the fixed frame being fixedly connected to the lifting frame, the rotating frame being rotatably connected to the fixed frame, a first toothed ring being fixedly connected to the outer surface of the rotating frame, a fourth gear being meshed with the outer surface of the first toothed ring, a lead screw being fixedly connected to the inner surface of the fourth gear, the lead screw being threadedly connected to the moving frame, a sixth gear being fixedly connected to the outer surface of the lead screw, a limiting telescopic rod being rotatably connected to the inner surface of the moving frame via a bearing, a seventh gear being fixedly connected to the lower surface of the limiting telescopic rod, the seventh gear being meshed with the sixth gear, an eighth gear being fixedly connected to the upper surface of the limiting telescopic rod, a second toothed ring being rotatably connected to the inner surface of the moving frame via a bearing, the second toothed ring being meshed with the eighth gear, a limiting frame being fixedly connected to the inner surface of the second toothed ring, a sliding groove being formed on the surface of the limiting frame, a limiting groove being formed on the inner surface of the moving frame, a moving rod being slidably connected to the inner surfaces of the limiting groove and the sliding groove, and a weak magnet being fixedly installed on the outer surface of the moving rod.

[0011] Preferably, the outer surface of the limiting telescopic rod near the bottom is rotatably connected to the lifting frame via a bearing bracket.

[0012] Preferably, a clamping plate is slidably connected to the inner surface of the fixed frame, a spiral groove is formed on the outer surface of the rotating frame, a limit block is slidably connected to the inner surface of the spiral groove, and the limit block is rotatably connected to the clamping plate.

[0013] Preferably, a testing method for a permanent magnet synchronous linear motor includes the following steps:

[0014] S1: When the lifting frame is outside the outer shell, the rotor is placed between the clamping plates. The second motor drives the rotating frame to rotate through gear transmission. The spiral groove and the limiting block are used to make the clamping plate close to the fixed rotor. At the same time, the rotating frame drives the ring rod to rotate. Through the reciprocating thread groove and the arc block, the cleaning brush rotates in both directions to clean the dust.

[0015] S2: When the rotating frame rotates, the first gear ring drives the gear and lead screw to rotate, driving the moving frame to slide. At the same time, the gear transmission causes the limiting telescopic rod to drive the second gear ring to rotate. The sliding rod slides back and forth through the cooperation of the sliding groove and the limiting groove. The weak magnet attracts iron filings, and the through hole of the moving frame cooperates with the dust pump to remove dust and fine iron filings, achieving thorough cleaning.

[0016] S3: The first motor drives the first rotating rod to rotate, the locking block of the rotating plate is embedded in the slot of the rotating disk to make it rotate at a set angle, the push rod contacts and pushes the protrusion of the connecting plate, causing the connecting plate to swing and pull the second pull rod to slide, the spring is stretched to store energy, and the limit tube ensures that the second pull rod slides stably;

[0017] S4: The second pull rod slides to drive the rack and gear transmission, causing the second rotating rod and the threaded rod to rotate. The lifting frame rises and falls along the limit rod, and the rotor is lifted upwards simultaneously to complete the "lifting method" test. The magnetic field changes are monitored by the coil inside the shell, and the test is repeated by changing the angle of the rotating disk multiple times to collect multi-dimensional data to locate the magnetic shaft of the irregular rotor.

[0018] S5: After the push rod pushes the connecting plate to the other side, the spring releases energy and causes the second pull rod to slide in the opposite direction, driving the connecting plate to reset and contact the elastic element of the stop rod. The locking block is embedded in the next locking slot, the rotating disk rotates again, and the lifting frame rises and falls in the outer shell. The coil monitors parameters such as magnetic field strength in real time, completes the basic performance test of the motor, and then enters the next cycle.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0020] 1. This invention proposes a testing device and method for permanent magnet synchronous linear motors. The testing device achieves adjustment of the rotating disk angle through precise cooperation between the locking block and the locking slot. Combined with a spring-driven rapid reset mechanism, the lifting frame can stably complete the lifting action along a set trajectory. While lifting the rotor for a "lifting method" test, the device monitors parameters such as magnetic field changes and induced electromotive force in real time through coils inside the casing. Its unique multi-angle rotation design allows for multi-dimensional magnetic field data acquisition for irregularly shaped rotors. Analysis can accurately locate the magnetic shaft position, ensuring high accuracy and strong adaptability in testing. Furthermore, the automated operation through mechanical linkage significantly improves testing efficiency, realizing the advantage of integrating multi-dimensional testing functions into a single device. This effectively reduces equipment investment and operational complexity, and has significant practical value for performance testing of permanent magnet synchronous linear motors, especially those with irregularly shaped rotors.

[0021] 2. This invention proposes a permanent magnet synchronous linear motor testing device and method. When the lifting frame is located outside the outer shell, the device drives the rotating frame to rotate via a second motor. The cooperation of the spiral groove and the limiting block allows the clamping plate to automatically approach and securely fix the rotor, ensuring the stability of subsequent operations. At the same time, the rotating frame drives the ring rod to rotate. With the linkage of the reciprocating threaded groove and the arc-shaped block, the cleaning brush can achieve 180-degree bidirectional rotation, thoroughly removing floating dust from the rotor surface. This not only achieves automation and reliability of rotor fixing, but also improves the dust removal effect through the bidirectional rotation of the cleaning brush, providing a clean and stable testing environment for subsequent testing, and enhancing the practicality and testing accuracy of the device.

[0022] 3. This invention proposes a testing device and method for a permanent magnet synchronous linear motor. The device uses a rotating frame to drive a first gear ring to rotate, which in turn drives a sliding frame via the linkage of gears and a lead screw. Simultaneously, a gear transmission causes a limiting telescopic rod to rotate a second gear ring. The sliding groove of the limiting frame and the limiting groove of the moving frame allow the moving rod to slide back and forth, achieving efficient adsorption of iron filings from the rotor surface by a weak magnet. The through holes in the inner wall of the moving frame provide movement space for the weak magnet and allow dust and fine iron filings to enter, which are then removed by an external dust pump. This thoroughly cleans the iron filings and dust from the rotor surface, ensuring rotor cleanliness, preventing impurities from interfering with subsequent testing, and further improving the cleaning effect and testing accuracy of the device. Attached Figure Description

[0023] Figure 1 This invention provides a schematic diagram of the external structure of a permanent magnet synchronous linear motor testing device and method.

[0024] Figure 2 This invention presents a schematic diagram of the internal structure of a permanent magnet synchronous linear motor testing device and method.

[0025] Figure 3 A partial structural diagram of the threaded rod of the present invention is provided for a permanent magnet synchronous linear motor testing device and method.

[0026] Figure 4 A partial cross-sectional view of the seventh gear of the permanent magnet synchronous linear motor testing device and method proposed in this invention;

[0027] Figure 5 A partial bottom view of the rack structure of the permanent magnet synchronous linear motor testing device and method proposed in this invention;

[0028] Figure 6 A partial cross-sectional view of the rotating disk is provided for the present invention regarding a testing device and method for a permanent magnet synchronous linear motor.

[0029] Figure 7 This is a partial cross-sectional view of the mounting block of the permanent magnet synchronous linear motor testing device and method proposed in this invention.

[0030] Figure 8 A partial bottom view of the limiting block structure of the permanent magnet synchronous linear motor testing device and method proposed in this invention;

[0031] Figure 9 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0032] Legend: 1. Outer shell; 2. Detection mechanism; 201. First rotating rod; 202. Rotating disk; 203. Rotating plate; 204. Push rod; 205. Locking block; 206. Locking groove; 207. Connecting plate; 208. Protrusion; 209. First pull rod; 210. Second pull rod; 211. Rack; 212. Second rotating rod; 213. Third rotating rod; 214. First gear; 215. Second gear; 216. Third gear; 217. Threaded rod; 218. Lifting frame; 3. Cleaning mechanism; 301. Rotating frame; 302. Support frame; 303. Ring rod; 304. Threaded groove; 305. Mounting frame; 306. Moving frame; 307. Mounting block; 308. Rotating block; 30 9. Arc-shaped block; 310. Connecting frame; 311. Cleaning brush; 4. Processing mechanism; 401. Fixing frame; 402. First gear ring; 403. Fourth gear; 404. Lead screw; 405. Sixth gear; 406. Limiting telescopic rod; 407. Seventh gear; 408. Eighth gear; 409. Second gear ring; 410. Limiting frame; 411. Slide groove; 412. Limiting groove; 413. Moving rod; 414. Weak magnet; 5. Positioning plate; 6. Racket; 7. Push rod; 8. Torsion spring; 9. Stop rod; 10. Limiting tube; 11. Limiting rod; 12. First motor; 13. Second motor; 14. Fourth rotating rod; 15. Fifth gear; 16. Clamping plate; 17. Spiral groove; 18. Limiting block. Detailed Implementation

[0033] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0035] like Figure 1 - Figure 4As shown, a permanent magnet synchronous linear motor testing device includes a housing 1. A testing mechanism 2 is disposed inside the housing 1. The testing mechanism 2 includes a first rotating rod 201 and a rotating disk 202. A rotating plate 203 and a push rod 204 are fixedly connected to the outer surface of the first rotating rod 201. A locking block 205 is fixedly connected to the outer surface of the rotating plate 203. A locking groove 206 is formed on the outer surface of the rotating disk 202, and the locking block 205 is slidably connected to the locking groove 206. A connecting plate 207 is rotatably connected to the outer surface of the first rotating rod 201 via a bearing. A protrusion 208 is fixedly connected to the lower surface of the connecting plate 207, and the push rod 204 contacts the protrusion 208. A first pull rod 209 is rotatably connected to the lower surface of the end of the connecting plate 207. The other end of 09 is rotatably connected to a second pull rod 210 via a bearing. A rack 211 is fixedly connected to the outer surface of the second pull rod 210. A second rotating rod 212 is rotatably connected to the inner surface of the rotating disk 202 via a bearing. A third rotating rod 213 is rotatably connected to the inner surface of the outer shell 1 via a bearing. A first gear 214 is fixedly connected to the outer surface of the second rotating rod 212. A second gear 215 and a third gear 216 are fixedly connected to the outer surface of the third rotating rod 213. The third gear 216 meshes with the rack 211. The second gear 215 meshes with the first gear 214. A threaded rod 217 is fixedly connected to the upper surface of the second rotating rod 212. A lifting frame 218 is fixedly connected to the outer surface of the threaded rod 217.

[0036] The effect is as follows: the first motor 12 starts running first, and its output end drives the first rotating rod 201 to rotate stably. At this time, the rotating plate 203 rotates together with the first rotating rod 201. The locking block 205 on the outer surface of the rotating plate 203 is embedded in the locking groove 206 of the rotating disk 202. With the tight cooperation between the locking block 205 and the locking groove 206, the rotating disk 202 is driven to rotate synchronously, and the rotation angle is strictly limited by the sliding stroke of the locking block 205 in the locking groove 206, ensuring that each rotation is precise and controllable. As the rotating disk 202 rotates... After moving to the preset angle, the push rod 204 on the first rotating rod 201 contacts the protrusion 208 on the lower surface of the connecting plate 207. The push rod 204 continues to rotate and applies a pushing force to the protrusion 208, causing the connecting plate 207 to swing around the first rotating rod 201 as a fulcrum. The first pull rod 209 connected to the end of the connecting plate 207 is pulled accordingly, thereby driving the second pull rod 210 to slide horizontally along the limiting tube 10. The limiting tube 10 provides stable guidance for the movement of the second pull rod 210, preventing it from deviating. Springs are installed inside the second pull rod 210 and the limiting tube 10. When the second pull rod 210 slides along the limiting tube 10 under the pull of the first pull rod 209, the springs are stretched and store elastic potential energy. During the sliding process of the second pull rod 210, the rack 211 on its outer surface moves synchronously. The rack 211 meshes with the third gear 216. The movement of the rack 211 drives the third gear 216 to rotate, thereby causing the third rotating rod 213 to start rotating. The second gear 215 on the third rotating rod 213 interacts with the second rotating rod 21. The first gear 214 on the 2 is in a meshing state. The rotation of the second gear 215 drives the first gear 214 to rotate, which in turn drives the second rotating rod 212 to rotate. The threaded rod 217 at the top of the second rotating rod 212 rotates synchronously. Since the lifting frame 218 is connected to the threaded rod 217 and is restricted by the limiting rod 11, the lifting frame 218 moves vertically up and down along the limiting rod 11. Each time the rotating disk 202 rotates a specific angle, the lifting action of the lifting frame 218 will synchronously lift the rotor upward.

[0037] like Figure 1 - Figure 9As shown, a positioning disk 5 is rotatably connected to the outer surface of the first rotating rod 201. The positioning disk 5 is fixedly connected to the outer shell 1. A ratchet 6 is provided on the outer surface of the positioning disk 5. A stop rod 7 is rotatably connected to the upper surface of the connecting plate 207 via a bearing. The stop rod 7 contacts the ratchet 6. A torsion spring 8 is fixedly connected between the stop rod 7 and the connecting plate 207. A stop rod 9 is fixedly connected to the inner surface of the outer shell 1. An elastic element is provided on the upper surface of the stop rod 9. A limit tube 10 is fixedly connected to the inner surface of the outer shell 1. The second pull rod 210 is slidably connected to the inner surface of the limit tube 10. On the surface of the rotating disk 202, a limit rod 11 is fixedly connected to the upper surface. The lifting frame 218 is slidably connected to the limit rod 11. A first motor 12 is installed on the inner surface of the outer casing 1. The output end of the first motor 12 is fixedly connected to the first rotating rod 201. Both the rotating disk 202 and the first rotating rod 201 are rotatably connected to the outer casing 1 through bearings. The center hole of the rotating disk 202 is rotatably connected to the outer surface of the second rotating rod 212 through bearings. A cleaning mechanism 3 is also provided on the inner surface of the outer casing 1. The cleaning mechanism 3 includes a rotating frame 301. A support frame 302 is fixedly connected to the outer surface of the rotating frame 301. A ring rod 303 is fixedly connected to the upper surface of the support frame 302. A threaded groove 304 is formed on the outer surface of the ring rod 303. A mounting frame 305 is fixedly connected to the upper surface of the lifting frame 218. A movable frame 306 is slidably connected to the outer surface of the mounting frame 305. A mounting block 307 is fixedly connected to the outer surface of the movable frame 306. A rotating block 308 is rotatably connected to the inner surface of the mounting block 307. An arc-shaped block 309 is fixedly connected to the inner surface of the rotating block 308. The arc-shaped block 309 is slidably connected to the threaded groove 304. The outer surface of the rotating block 308 is fixedly connected to the connecting frame 310. The outer surface of the connecting frame 310 is rotatably connected to the cleaning brush 311. The inner surface of the lifting frame 218 is equipped with the second motor 13. The output end of the second motor 13 is fixedly connected to the fourth rotating rod 14. The upper surface of the lifting frame 218 is rotatably connected to the rotating frame 301 through the bearing. The outer surfaces of the fourth rotating rod 14 and the rotating frame 301 are both fixedly connected to the fifth gear 15. The two fifth gears 15 are meshed together.

[0038] The effect is that the support frame 302 on the rotating frame 301 drives the annular rod 303 to rotate synchronously. The reciprocating threaded groove 304 on the outer surface of the annular rod 303 cooperates with the arc-shaped block 309 on the moving frame 306. The arc-shaped block 309 slides in the threaded groove 304, driving the rotating block 308 to rotate. The rotating block 308 then drives the cleaning brush 311 to rotate through the connecting frame 310. When the cleaning brush 311 rotates 180 degrees, due to the reciprocating characteristic of the threaded groove 304, the arc-shaped block 309 enters the reverse thread section, forcing the cleaning brush 311 to reverse 180 degrees. This bidirectional rotation can more thoroughly clean the rotor surface, ensuring that floating dust is effectively removed.

[0039] like Figure 1 - Figure 9As shown, the inner surface of the outer casing 1 is also provided with a processing mechanism 4. The processing mechanism 4 includes a fixed frame 401, which is fixedly connected to the lifting frame 218. A rotating frame 301 is rotatably connected to the fixed frame 401. A first toothed ring 402 is fixedly connected to the outer surface of the rotating frame 301. A fourth gear 403 is meshed with the outer surface of the first toothed ring 402. A lead screw 404 is fixedly connected to the inner surface of the fourth gear 403. The lead screw 404 is threadedly connected to the moving frame 306. A sixth gear 405 is fixedly connected to the outer surface of the lead screw 404. A limit telescopic rod 406 is rotatably connected to the inner surface of the moving frame 306 through a bearing. A seventh gear 407 is fixedly connected to the lower surface of the limit telescopic rod 406. The seventh gear 407 meshes with the sixth gear 405. An eighth toothed rod is fixedly connected to the upper surface of the limit telescopic rod 406. The inner surface of the wheel 408 and the movable frame 306 is rotatably connected to the second gear ring 409 via bearings. The second gear ring 409 meshes with the eighth gear 408. The inner surface of the second gear ring 409 is fixedly connected to the limit frame 410. The surface of the limit frame 410 is provided with a sliding groove 411. The inner surface of the movable frame 306 is provided with a limit groove 412. The inner surfaces of the limit groove 412 and the sliding groove 411 are slidably connected to the movable rod 413. The outer surface of the movable rod 413 is fixedly installed with a weak magnet 414. The outer surface of the limit telescopic rod 406 near the bottom is rotatably connected to the lifting frame 218 via a bearing frame. The inner surface of the fixed frame 401 is slidably connected to the clamping plate 16. The outer surface of the rotating frame 301 is provided with a spiral groove 17. The inner surface of the spiral groove 17 is slidably connected to the limit block 18. The limit block 18 is rotatably connected to the clamping plate 16.

[0040] The effect is that when the lifting frame 218 is outside the outer casing 1, the rotor is placed between multiple clamping plates 16. The output end of the second motor 13 transmits power to the rotating frame 301 through the fourth rotating rod 14 and two meshing fifth gears 15, causing the rotating frame 301 to start rotating. The rotation of the rotating frame 301 drives the spiral groove 17 on its outer surface to rotate. The limiting block 18 in the spiral groove 17 slides in the groove, thereby pushing the clamping plates 16 closer to each other in the fixed frame 401, firmly fixing the rotor and providing a stable foundation for subsequent cleaning work. The first gear ring 402 rotates with the rotating frame 301, driving the fourth gear 403 that meshes with it to rotate. The fourth gear 403 then drives the lead screw 404 to rotate. The lead screw 404 is threadedly connected to the moving frame 306, thereby driving the moving frame 306 to slide along the mounting frame 305. When the lead screw 404 rotates, the first gear ring 402 on its outer surface rotates. The sixth gear 405 meshes with the seventh gear 407 at the bottom of the limiting telescopic rod 406, causing the limiting telescopic rod 406 to rotate. The eighth gear 408 at the top of the limiting telescopic rod 406 meshes with the second gear ring 409, causing the second gear ring 409 to rotate. The limiting frame 410 inside the second gear ring 409 rotates accordingly. The sliding groove 411 on the limiting frame 410 cooperates with the limiting groove 412 on the moving frame 306, causing the moving rod 413 to slide back and forth in the groove. The weak magnet 414 on the moving rod 413 continuously approaches and moves away from the rotor surface, effectively adsorbing iron filings on the rotor surface. Moreover, the inner wall of the moving frame 306 is provided with through holes, which not only provide a channel for the movement of the weak magnet 414, but also allow dust and some small iron filings to enter the interior of the moving frame 306 through the through holes. Then, an external dust pump connected to the moving frame 306 will remove them, achieving a thorough cleaning of the rotor surface.

[0041] like Figure 1 - Figure 9 As shown, a test method for a permanent magnet synchronous linear motor includes the following steps:

[0042] S1: When the lifting frame 218 is located outside the outer shell 1, the rotor is placed between the clamping plates 16. The second motor 13 drives the rotating frame 301 to rotate through gear transmission. The spiral groove 17 cooperates with the limiting block 18 to make the clamping plate 16 close to the fixed rotor. At the same time, the rotating frame 301 drives the ring rod 303 to rotate. Through the reciprocating thread groove 304 and the arc block 309 linkage, the cleaning brush 311 rotates in both directions to clean the dust.

[0043] S2: When the rotating frame 301 rotates, the first gear ring 402 drives the gear and lead screw 404 to operate, driving the moving frame 306 to slide. At the same time, the gear transmission causes the limiting telescopic rod 406 to drive the second gear ring 409 to rotate. The sliding rod 413 slides back and forth through the cooperation of the sliding groove 411 and the limiting groove 412. The weak magnet 414 attracts iron filings. The through hole of the moving frame 306 cooperates with the dust pump to remove dust and fine iron filings, achieving thorough cleaning.

[0044] S3: The first motor 12 drives the first rotating rod 201 to rotate. The locking block 205 of the rotating plate 203 is embedded in the locking groove 206 of the rotating disk 202 to make it rotate at a set angle. The push rod 204 contacts and pushes the protrusion 208 of the connecting plate 207, causing the connecting plate 207 to swing and pull the second pull rod 210 to slide. The spring is stretched and stores energy. The limiting tube 10 ensures that the second pull rod 210 slides stably.

[0045] S4: The second pull rod 210 slides and drives the rack 211 and gear transmission, causing the second rotating rod 212 and the threaded rod 217 to rotate. The lifting frame 218 rises and falls along the limit rod 11, and the rotor is lifted upwards simultaneously to complete the "lifting method" test. The magnetic field change is monitored by the coil inside the outer shell 1, and the angle of the rotating disk 202 is changed multiple times to repeat the test and collect multi-dimensional data to locate the magnetic shaft of the irregular rotor.

[0046] S5: After push rod 204 pushes connecting plate 207 to the other side, spring releases energy and causes second pull rod 210 to slide in the opposite direction, driving connecting plate 207 to reset and contact the elastic element of stop rod 9. The locking block 205 is inserted into the next locking slot 206, the rotating disk 202 rotates again, and when lifting frame 218 is raised and lowered in the outer shell 1, the coil monitors parameters such as magnetic field strength in real time, completes the basic performance test of the motor, and then enters the next cycle.

[0047] Working principle: When the lifting frame 218 is outside the outer casing 1, the rotor is placed between multiple clamping plates 16. The output end of the second motor 13 transmits power to the rotating frame 301 through the fourth rotating rod 14 and two meshing fifth gears 15, causing the rotating frame 301 to start rotating. The rotation of the rotating frame 301 drives the spiral groove 17 on its outer surface to rotate. The limiting block 18 in the spiral groove 17 slides in the groove, thereby pushing the clamping plates 16 closer to each other in the fixed frame 401, firmly fixing the rotor and providing a stable foundation for subsequent cleaning work. At the same time, the support frame 302 on the rotating frame 301 drives the ring rod 303 to rotate synchronously. The reciprocating thread groove 304 on the outer surface of the ring rod 303 cooperates with the arc-shaped block 309 on the moving frame 306. The arc-shaped block 309 slides within the threaded groove 304, causing the rotating block 308 to rotate. The rotating block 308, in turn, drives the cleaning brush 311 to rotate via the connecting frame 310. When the cleaning brush 311 rotates 180 degrees, due to the reciprocating characteristic of the threaded groove 304, the arc-shaped block 309 enters the reverse thread section, forcing the cleaning brush 311 to reverse 180 degrees. This bidirectional rotation can more thoroughly clean the rotor surface, ensuring that floating dust is effectively removed. At the same time, the first gear ring 402 rotates with the rotating frame 301, driving the fourth gear 403 meshing with it to rotate. The fourth gear 403 then drives the lead screw 404 to rotate. The lead screw 404 is threadedly connected to the moving frame 306, thereby driving the moving frame 306 to slide along the mounting frame 305. When the lead screw 404 rotates... The sixth gear 405 on its outer surface meshes with the seventh gear 407 at the bottom of the limiting telescopic rod 406, causing the limiting telescopic rod 406 to rotate. The eighth gear 408 at the top of the limiting telescopic rod 406 meshes with the second gear ring 409, causing the second gear ring 409 to rotate. The limiting frame 410 inside the second gear ring 409 rotates accordingly. The sliding groove 411 on the limiting frame 410 cooperates with the limiting groove 412 on the moving frame 306, causing the moving rod 413 to slide back and forth in the groove. The weak magnet 414 on the moving rod 413 continuously approaches and moves away from the rotor surface. The weak magnet 414 is a low-magnetic-force permanent magnet made of neodymium iron boron weak magnetic grade, which is used for iron filings adsorption and cleaning. It can effectively remove iron filings from the rotor surface, and because its magnetic force is weak, it will not affect the detection mechanism. The detection of the rotor magnetic displacement and magnetic shaft position effectively adsorbs iron filings from the rotor surface. Furthermore, the inner wall of the moving frame 306 has through holes, providing a channel for the movement of the weak magnet 414 and allowing dust and some fine iron filings to enter the moving frame 306 through these holes. An external dust pump connected to the moving frame 306 then removes these particles, achieving thorough cleaning of the rotor surface. When the device is started, the first motor 12 begins to operate, its output driving the first rotating rod 201 to rotate stably. At this time, the rotating plate 203 rotates together with the first rotating rod 201. The locking block 205 on the outer surface of the rotating plate 203 embeds into the slot 206 of the rotating disk 202. With the tight cooperation between the locking block 205 and the slot 206, the rotating disk 202 is driven to rotate synchronously.Furthermore, the rotation angle is strictly limited by the sliding stroke of the locking block 205 within the locking slot 206, ensuring precise controllability for each rotation. As the rotating disk 202 rotates to the preset angle, the push rod 204 on the first rotating rod 201 contacts the protrusion 208 on the lower surface of the connecting plate 207. The push rod 204 continues to rotate and applies a pushing force to the protrusion 208, causing the connecting plate 207 to press against the elastic element, which in turn presses against the stop rod 9. The connecting plate 207 can continue to rotate through the elastic element, causing it to swing around the first rotating rod 201 as a fulcrum. The first pull rod 209 connected to the end of the connecting plate 207 is then pulled, thereby driving the second pull rod 210 to slide horizontally along the limiting tube 10. The limiting tube 10 then acts as the second pull rod. The movement of rod 210 provides stable guidance and prevents it from deviating. Springs are installed inside the second pull rod 210 and the limiting tube 10. When the second pull rod 210 slides along the limiting tube 10 under the pull of the first pull rod 209, the springs are stretched, storing elastic potential energy. During the sliding process of the second pull rod 210, the rack 211 on its outer surface moves synchronously. The rack 211 meshes with the third gear 216. The movement of the rack 211 drives the third gear 216 to rotate, thereby causing the third rotating rod 213 to start rotating. The second gear 215 on the third rotating rod 213 is meshed with the first gear 214 on the second rotating rod 212. The rotation of the second gear 215 drives the first gear 214 to rotate, thereby driving the second rotating rod 212... 2. As the second rotating rod 212 rotates, the threaded rod 217 at the top of the second rotating rod 212 rotates synchronously. Since the lifting frame 218 is connected to the threaded rod 217 and is restricted by the limiting rod 11, the lifting frame 218 moves vertically up and down along the limiting rod 11. Each time the rotating disk 202 rotates a specific angle, the lifting action of the lifting frame 218 will simultaneously lift the rotor upward: when the lifting frame 218 rises, the rotor fixed at its top is lifted upward and separated from the coil area inside the outer casing 1, completing one "lifting method" test. By monitoring the change in the magnetic field induced by the coil during the lifting process, the distribution characteristics of the rotor's magnetic field can be captured. For irregularly shaped rotors, the position of their magnetic axis is often irregular. By repeatedly changing the rotation angle of the rotating disk 202, the magnetic field distribution characteristics of the rotor can be captured. By conducting a pull-up test, magnetic field data can be collected from multiple dimensions. Finally, through data comparison and analysis, the magnetic shaft position of the irregularly shaped rotor can be accurately located. When the push rod 204 pushes the connecting plate 207 to the other side, the elastic potential energy stored in the spring is released instantaneously, generating a strong elastic force that acts on the second pull rod 210, pushing it to slide rapidly in the opposite direction. This reverse sliding is transmitted to the connecting plate 207 through the first pull rod 209, causing the connecting plate 207 to rotate rapidly to the other side with the first rotating rod 201 as the fulcrum. This allows the relevant components on the connecting plate 207 to contact the elastic element on the upper surface of the stop rod 9, completing a rapid reset action. Afterwards, the locking block 205 on the outer surface of the rotating plate 203 embeds into the next locking slot 206 of the rotating disk 202.The rotating disk 202 is driven to rotate synchronously again. When the lifting frame 218 rises and falls inside the outer casing 1, an electromagnetic induction is generated between the pre-set coil inside the outer casing 1 and the rotor of the motor to be tested. Specialized detection elements monitor parameters such as the magnetic field strength and induced electromotive force in real time during this process, thereby completing the preliminary test of the basic performance of the permanent magnet synchronous linear motor.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A permanent magnet synchronous linear motor testing device, comprising a housing (1), characterized in that: The outer casing (1) is equipped with a detection mechanism (2). The detection mechanism (2) includes a first rotating rod (201) and a rotating disk (202). A rotating plate (203) and a push rod (204) are fixedly connected to the outer surface of the first rotating rod (201). A locking block (205) is fixedly connected to the outer surface of the rotating plate (203). A slot (206) is opened on the outer surface of the rotating disk (202). The locking block (205) is slidably connected to the slot (206). A connecting plate (207) is rotatably connected to the outer surface of the first rotating rod (201) through a bearing. A protrusion (208) is fixedly connected to the lower surface of the connecting plate (207). The push rod (204) contacts the protrusion (208). A first pull rod (209) is rotatably connected to the lower surface of the end of the connecting plate (207). The other end of the first pull rod (209) is connected to the first pull rod (209). A second pull rod (210) is rotatably connected via a bearing. A rack (211) is fixedly connected to the outer surface of the second pull rod (210). A second rotating rod (212) is rotatably connected to the inner surface of the rotating disk (202) via a bearing. A third rotating rod (213) is rotatably connected to the inner surface of the outer shell (1) via a bearing. A first gear (214) is fixedly connected to the outer surface of the second rotating rod (212). A second gear (215) and a third gear (216) are fixedly connected to the outer surface of the third rotating rod (213). The third gear (216) meshes with the rack (211). The second gear (215) meshes with the first gear (214). A threaded rod (217) is fixedly connected to the upper surface of the second rotating rod (212). A lifting frame (218) is fixedly connected to the outer surface of the threaded rod (217).

2. The permanent magnet synchronous linear motor testing device according to claim 1, characterized in that: The outer surface of the first rotating rod (201) is rotatably connected to a positioning disk (5), the positioning disk (5) is fixedly connected to the outer shell (1), the outer surface of the positioning disk (5) is provided with ratchet teeth (6), the upper surface of the connecting plate (207) is rotatably connected to a stop rod (7) through a bearing, the stop rod (7) contacts the ratchet teeth (6), the stop rod (7) is fixedly connected to the connecting plate (207) with a torsion spring (8), the inner surface of the outer shell (1) is fixedly connected to a stop rod (9), and the upper surface of the stop rod (9) is provided with an elastic element.

3. The permanent magnet synchronous linear motor testing device according to claim 1, characterized in that: The inner surface of the outer shell (1) is fixedly connected to a limiting tube (10), the second pull rod (210) is slidably connected to the inner surface of the limiting tube (10), the upper surface of the rotating disk (202) is fixedly connected to a limiting rod (11), and the lifting frame (218) is slidably connected to the limiting rod (11).

4. The permanent magnet synchronous linear motor testing device according to claim 2, characterized in that: The inner surface of the outer shell (1) is equipped with a first motor (12), the output end of the first motor (12) is fixedly connected to the first rotating rod (201), the rotating disk (202) and the first rotating rod (201) are rotatably connected to the outer shell (1) through bearings, and the center hole of the rotating disk (202) is rotatably connected to the outer surface of the second rotating rod (212) through bearings.

5. The permanent magnet synchronous linear motor testing device according to claim 1, characterized in that: The inner surface of the outer casing (1) is also provided with a cleaning mechanism (3), the cleaning mechanism (3) includes a rotating frame (301), a support frame (302) is fixedly connected to the outer surface of the rotating frame (301), an annular rod (303) is fixedly connected to the upper surface of the support frame (302), a threaded groove (304) is opened on the outer surface of the annular rod (303), and a mounting frame (305) is fixedly connected to the upper surface of the lifting frame (218), and a sliding connection is made to the outer surface of the mounting frame (305). A movable frame (306) is fixedly connected to an installation block (307) on its outer surface. A rotating block (308) is rotatably connected to the inner surface of the installation block (307). An arc-shaped block (309) is fixedly connected to the inner surface of the rotating block (308). The arc-shaped block (309) is slidably connected to a threaded groove (304). A connecting frame (310) is fixedly connected to the outer surface of the rotating block (308). A cleaning brush (311) is rotatably connected to the outer surface of the connecting frame (310).

6. The permanent magnet synchronous linear motor testing device according to claim 1, characterized in that: The inner surface of the lifting frame (218) is equipped with a second motor (13), and the output end of the second motor (13) is fixedly connected to a fourth rotating rod (14). The upper surface of the lifting frame (218) is rotatably connected to the rotating frame (301) through a bearing. The outer surfaces of the fourth rotating rod (14) and the rotating frame (301) are both fixedly connected with a fifth gear (15), and the two fifth gears (15) are meshed together.

7. The permanent magnet synchronous linear motor testing device according to claim 5, characterized in that: The inner surface of the outer shell (1) is further provided with a processing mechanism (4). The processing mechanism (4) includes a fixed frame (401), which is fixedly connected to the lifting frame (218). The rotating frame (301) is rotatably connected to the fixed frame (401). A first toothed ring (402) is fixedly connected to the outer surface of the rotating frame (301). A fourth gear (403) is meshed with the outer surface of the first toothed ring (402). A lead screw (404) is fixedly connected to the inner surface of the fourth gear (403). The lead screw (404) is threadedly connected to the moving frame (306). A sixth gear (405) is fixedly connected to the outer surface of the lead screw (404). A limit telescopic rod (406) is rotatably connected to the inner surface of the moving frame (306) through a bearing. The limit telescopic rod (406) is... A seventh gear (407) is fixedly connected to the lower surface, and the seventh gear (407) meshes with the sixth gear (405). An eighth gear (408) is fixedly connected to the upper surface of the limiting telescopic rod (406). A second toothed ring (409) is rotatably connected to the inner surface of the movable frame (306) through a bearing. The second toothed ring (409) meshes with the eighth gear (408). A limiting frame (410) is fixedly connected to the inner surface of the second toothed ring (409). A sliding groove (411) is opened on the surface of the limiting frame (410). A limiting groove (412) is opened on the inner surface of the movable frame (306). A movable rod (413) is slidably connected to the inner surfaces of the limiting groove (412) and the sliding groove (411). A weak magnet (414) is fixedly installed on the outer surface of the movable rod (413).

8. The permanent magnet synchronous linear motor testing device according to claim 7, characterized in that: The outer surface of the limiting telescopic rod (406) near the bottom is rotatably connected to the lifting frame (218) via a bearing frame.

9. The permanent magnet synchronous linear motor testing device according to claim 7, characterized in that: The inner surface of the fixed frame (401) is slidably connected to a clamping plate (16), and the outer surface of the rotating frame (301) is provided with a spiral groove (17). The inner surface of the spiral groove (17) is slidably connected to a limiting block (18), and the limiting block (18) is rotatably connected to the clamping plate (16).

10. A method for testing a permanent magnet synchronous linear motor, applied to the testing device for a permanent magnet synchronous linear motor as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: When the lifting frame (218) is located outside the outer shell (1), the rotor is placed between the clamping plates (16). The second motor (13) drives the rotating frame (301) to rotate through gear transmission. The spiral groove (17) cooperates with the limiting block (18) to make the clamping plate (16) close to the fixed rotor. At the same time, the rotating frame (301) drives the ring rod (303) to rotate. Through the reciprocating thread groove (304) and the arc block (309) linkage, the cleaning brush (311) rotates in both directions to clean the dust. S2: When the rotating frame (301) rotates, the first gear ring (402) drives the gear and lead screw (404) to rotate, driving the moving frame (306) to slide. At the same time, the gear transmission causes the limiting telescopic rod (406) to drive the second gear ring (409) to rotate. The sliding rod (413) slides back and forth through the cooperation of the sliding groove (411) and the limiting groove (412). The weak magnet (414) attracts iron filings. The through hole of the moving frame (306) cooperates with the dust pump to remove dust and fine iron filings, achieving thorough cleaning. S3: The first motor (12) drives the first rotating rod (201) to rotate. The locking block (205) of the rotating plate (203) is embedded in the slot (206) of the rotating disk (202) to make it rotate at a set angle. The push rod (204) contacts and pushes the protrusion (208) of the connecting plate (207) to make the connecting plate (207) swing and pull the second pull rod (210) to slide. The spring is stretched and stores energy. The limiting tube (10) ensures that the second pull rod (210) slides stably. S4: The second pull rod (210) slides and drives the rack (211) and gear transmission, causing the second rotating rod (212) and the threaded rod (217) to rotate. The lifting frame (218) rises and falls along the limit rod (11), and the rotor is lifted upwards in sync to complete the "lifting method" test. The magnetic field change is monitored by the coil inside the outer shell (1), and the angle of the rotating disk (202) is changed many times to repeat the test. Multi-dimensional data is collected to locate the magnetic shaft of the irregular rotor. S5: After the push rod (204) pushes the connecting plate (207) to the other side, the spring releases energy and causes the second pull rod (210) to slide in the opposite direction, driving the connecting plate (207) to reset and contact the elastic element of the stop rod (9). The card block (205) is embedded in the next card slot (206), the rotating disk (202) rotates again, and when the lifting frame (218) is raised and lowered in the outer shell (1), the coil monitors the magnetic field strength in real time, completes the basic performance test of the motor, and then enters the next cycle.

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