Silicon carbide power device reliability detection device

Abstract

The invention relates to the technical field of silicon carbide power devices, in particular to a silicon carbide power device reliability detection device which comprises an operation table and a feeding mechanism, the feeding mechanism is installed in the center of the table top of the operation table, and the feeding mechanism comprises a first servo motor, a main driving shaft and a chain wheel set. The first servo motor drives the chain wheel set to rotate by driving the main driving shaft, the chain wheel set is installed in the center of the table top of the operation table to rotate, and the clamping device is characterized in that 22 sets of clamping mechanisms are fixedly arranged on the side of the chain wheel set and comprise fixing assemblies and limiting clamps; through the arrangement of the limiting clamp capable of clamping the silicon carbide device, through the design, the unqualified product can be quickly removed and conveniently taken when detected, the potential safety hazard is reduced while the manpower is reduced, through the design, the pushing mechanism can be driven to push out the damaged device when the damaged device is detected, and the silicon carbide device detection device is convenient, quick and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon carbide power devices, and in particular to a reliability detection device for silicon carbide power devices. Background Art

[0002] With the continuous development of power electronics technology, silicon carbide power devices have been widely used in new energy vehicles, rail transit, smart grids and other fields due to their excellent performance such as high withstand voltage, high frequency and low loss. However, silicon carbide power devices face various complex working environments and stress conditions in practical applications, such as high temperature, high voltage, high current, etc., which may lead to device performance degradation or even failure. Therefore, it is very important to accurately detect the reliability of silicon carbide power devices. For example, the announcement number CN112485241B discloses a junction temperature and current synchronous detection system and detection method for silicon carbide power devices. The electroluminescence spectrum of silicon carbide power devices is separated, and the luminous intensity of two bands in the electroluminescence of silicon carbide power devices is detected at different operating temperatures and operating currents, and a function model of the luminous intensity of the two bands with the operating temperature and the operating current is established. The junction temperature and current of the silicon carbide power device are derived according to the luminous intensity of the two bands through a decoupling algorithm. The detection method based on the electroluminescent effect of silicon carbide does not require additional measurement of the electrical quantity of the silicon carbide power device, has the characteristic of inherent electrical isolation, realizes non-contact detection, and is particularly suitable for synchronous online detection of junction temperature and current of silicon carbide power devices working in high temperature, high voltage and high current applications, and has high accuracy and real-time performance.

[0003] Although the detection device in the prior art can meet the needs of use, it is unable to detect the quality of silicon carbide devices in large quantities during production. Manual detection is time-consuming and increases production costs. In addition, it is unable to detect the same batch of silicon carbide devices. High power is prone to high temperature damage. When the existing device detects damaged silicon carbide devices or silicon carbide devices of unqualified quality, they still need to be manually removed, which is not only inefficient but also has certain safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a reliability detection device for silicon carbide power devices to solve the problem mentioned in the above background technology that the quality of existing silicon carbide devices cannot be detected in large quantities during production, manual detection is time-consuming and increases production costs, and it is impossible to detect the same batch of silicon carbide devices. High power is prone to high-temperature damage. When the existing device detects damaged silicon carbide devices or silicon carbide devices of unqualified quality, they still need to be manually removed, which is not only inefficient but also has certain safety hazards.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reliability detection device for silicon carbide power devices, comprising an operating table and a feeding mechanism, wherein the feeding mechanism is installed at the center of the table top of the operating table, the feeding mechanism comprises a first servo motor, a main drive shaft and a sprocket group, the first servo motor drives the sprocket group to rotate by driving the main drive shaft, the sprocket group is installed at the center of the table top of the operating table for rotation, twenty-two groups of clamping mechanisms are fixedly arranged on the side of the sprocket group, the clamping mechanism comprises a fixing component and a limiting clamp, the limiting clamp is embedded in the front side of the top of the fixing component, a silicon carbide device is clamped inside the front end of the limiting clamp, a main pin is provided at the bottom end of the silicon carbide device, the main pin is inserted into the bottom side of the limiting clamp, and a fixing component is installed on the right rear side of the operating table. A detection mechanism is installed, which includes a second servo motor and a threaded rod. The bottom end of the second servo motor drives the threaded rod to rotate. The center of the threaded rod is relatively sleeved with a temperature detection component and a power supply component. The temperature detection component and the power supply component are synchronously lifted and lowered relative to each other in the threaded rod. The power supply component supplies power to drive the silicon carbide device to operate. The temperature detection component can perform temperature detection on the operating silicon carbide device. When the top end of the rear side of the temperature detection component rises, it drives the linkage component to operate. The linkage component synchronously drives the ejection mechanism to operate. The ejection mechanism includes a drive frame and a push assembly. A push assembly is installed inside the top end of the drive frame. The linkage assembly can drive the drive frame to operate and then drive the push assembly to push the limit clamp and the silicon carbide device out of the top end of the fixed assembly.

[0006] Preferably, there are a total of twenty-two groups of the clamping mechanisms fixed around the sides of the sprocket group, and the top end of a single group of the clamping mechanisms clamps the silicon carbide device in a direction facing outwards.

[0007] Preferably, the fixing assembly includes a C-shaped block and a protruding block, the C-shaped block is fixed on the side of the sprocket assembly, the protruding block is fixed at the front end of the C-shaped block, a vertical rod is fixed at the center of the protruding block, a ball is embedded in the bottom end of the vertical rod and moves on the table top of the operating table, a horizontal plate is fixed at the top of the vertical rod, and square grooves are opened at the upper and lower front ends of the horizontal plate.

[0008] Preferably, the limiting clamp comprises two groups of L-shaped blocks and U-shaped blocks, the rear ends of the two groups of L-shaped blocks are relatively fixed in the square groove at the front end of the cross plate, the front ends of the two groups of L-shaped blocks are fixed with U-shaped blocks, the inner two walls of the U-shaped blocks are fixed with rubber clamping blocks, the bottom side of the front end of the U-shaped blocks is fixed with a fixing plate, two groups of auxiliary pins are installed in the center of the fixing plate, the two groups of rubber clamping blocks clamp the silicon carbide device in the center, and the main pin installed at the bottom end of the silicon carbide device is inserted into the top of the auxiliary pin.

[0009] Preferably, a signal receiver is installed at the top of the second servo motor, and auxiliary sliding rods are inserted on both sides of the rear ends of the temperature detection component and the power supply component.

[0010] Preferably, the temperature detection assembly includes an upper long barrel nut and an upper support frame, the upper long barrel nut is threadedly inserted on the upper side of the threaded rod, the upper support frame is fixed to the side of the upper long barrel nut, a first tooth plate is fixed to the left side of the rear end of the upper support frame, a connecting plate is fixed to the front end of the upper support frame, an infrared thermal imager is installed at the front end of the connecting plate, a connecting line is provided at the top of the infrared thermal imager to connect to the controller, the controller is installed at the top of the operating table, and a signal transmitter is installed at the front end of the controller.

[0011] Preferably, the power supply assembly includes a lower long barrel nut and a lower support frame, the lower long barrel nut is threadedly inserted on the bottom side of the threaded rod, the lower support frame is fixed to the side of the lower long barrel nut, a mounting plate is fixed to the front end of the lower support frame, a power box is installed on the top of the mounting plate, and the power box controls the current to supply power to the power supply pin through a current controller at the top.

[0012] Preferably, the linkage assembly includes a first belt group and a first rotating shaft, the bottom end of the first belt group is installed on the upper side of the driving frame, the upper side of the first belt group is installed on the right end of the first rotating shaft, the front end of the second belt group is installed in the center of the first rotating shaft, the rear end of the second belt group is installed in the center of the second rotating shaft, the right end of the second rotating shaft is fixed with a first gear, the rear end of the first gear engages with the front end of the first tooth plate, and the left ends of the first rotating shaft and the second rotating shaft are both inserted into the right wall of the limit block.

[0013] Preferably, the driving frame includes a vertical block and side panels, side panels are fixed on the left and right sides of the top of the vertical block, a rotating rod is inserted in the center of the two groups of side panels, a second gear is fixed in the center of the rotating rod, and the bottom end of the first belt group is installed at the left end of the rotating rod.

[0014] Preferably, the pushing assembly includes a square tube and a T-shaped slide rail, the square tube is installed at the top center of the vertical block, a square notch is opened at the connection between the top center of the square tube and the second gear, a T-shaped slide rail is fixed at the inner bottom end of the square tube, a T-shaped slider is sleeved inside the T-shaped slide rail, a second tooth plate is fixed at the top of the T-shaped slider, and an extension rod is fixed at the rear end of the second tooth plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Twenty-two sets of fixed components are fixed on the sprocket group. This design can be used to install a large number of silicon carbide devices for subsequent testing. This design further improves efficiency. By setting a limit fixture that can clamp the silicon carbide device, this design is beneficial for the rapid installation and testing of the silicon carbide device. This design also facilitates the rapid removal of unqualified products, which is convenient for picking up, reducing labor and safety hazards;

[0017] 2. The fixed component can be driven to rise by the threaded rod, and then the silicon carbide device can be tested with the maximum power through the power supply pin under the control of the current controller. This design can detect the maximum output power of the silicon carbide device more quickly, thereby detecting its product quality. The infrared thermal imager provided in the temperature detection component can perform real-time temperature detection on the running silicon carbide device to improve the detection accuracy, reduce errors and reduce production costs. The controller and the signal transmitter can send instructions to the signal receiver provided on the top of the first servo motor to control the lifting distance of the temperature detection component and the power supply component. This design is beneficial to the detection of damaged devices and can drive the ejection mechanism to eject the damaged device, which is convenient and easy to operate;

[0018] 3. By setting up a driving frame, the pushing component can be driven by the linkage component to operate. This design is beneficial to reducing energy consumption, facilitating manual identification of damaged silicon carbide devices and reducing fault tolerance. The damaged silicon carbide devices after detection can be pushed out a certain distance or directly out of the device through the provided pushing component. This device reduces manual selection time and improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic front view of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 3 It is an enlarged schematic side view of the clamping mechanism of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram at A in the middle;

[0024] Figure 5 It is an enlarged side view schematic diagram of the temperature detection component structure of the present invention;

[0025] Figure 6 It is an enlarged side view schematic diagram of the power supply assembly structure of the present invention;

[0026] Figure 7 It is an enlarged schematic diagram of the linkage assembly structure of the present invention;

[0027] Figure 8 It is a rear view schematic diagram of the ejection mechanism of the present invention.

[0028] In the figure: 1. operating table; 2. feeding mechanism; 21. first servo motor; 22. main drive shaft; 23. sprocket assembly; 3. clamping mechanism; 31. fixing assembly; 311. C-shaped block; 312. protruding block; 313. vertical rod; 314. ball bearing; 315. horizontal plate; 316. square groove; 32. limit clamp; 321. L-shaped block; 322. U-shaped block; 323. rubber clamp block; 324. fixing plate; 325. auxiliary pin; 4. silicon carbide device; 41. main pin; 5. detection mechanism; 51. second servo motor; 52. signal receiver; 53. threaded rod; 54. temperature detection assembly; 541. upper long barrel nut; 542. upper support frame; 543. first tooth plate; 544. connecting plate; 545. infrared thermal imager; 546. connecting line; 547. controller; 548. signal transmitter; 55. power supply assembly; 551. lower long barrel nut; 552. lower support frame; 553. mounting plate; 554. power supply box; 555. current controller; 556. power supply pin; 56. auxiliary slide bar; 6. linkage assembly; 61. first belt group; 62. first rotating shaft; 63. limit block; 64. second belt group; 65. second rotating shaft; 66. first gear; 7. ejection mechanism; 71. drive frame; 711. vertical block; 712. side plate; 713. rotating rod; 714. second gear; 72. pushing assembly; 721. square tube; 722. square notch; 723. T-shaped slide rail; 724. T-shaped slide block; 725. second tooth plate; 726. extension rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8, an embodiment of the present invention: a reliability detection device for silicon carbide power devices, comprising an operating table 1 and a feeding mechanism 2, the feeding mechanism 2 is installed at the center of the table top of the operating table 1, the feeding mechanism 2 comprises a first servo motor 21, a main drive shaft 22 and a sprocket group 23, the first servo motor 21 drives the sprocket group 23 to rotate by driving the main drive shaft 22, the sprocket group 23 is installed at the center of the table top of the operating table 1 to rotate, twenty-two groups of clamping mechanisms 3 are fixed on the side of the sprocket group 23, the clamping mechanism 3 comprises a fixing component 31 and a limiting clamp 32, the limiting clamp 32 is embedded on the front side of the top of the fixing component 31, the front end of the limiting clamp 32 clamps a silicon carbide device 4, the bottom end of the silicon carbide device 4 is provided with a main pin 41, the main pin 41 is inserted on the bottom side of the limiting clamp 32, and the detection mechanism 5 is installed on the right rear side of the operating table 1, The detection mechanism 5 includes a second servo motor 51 and a threaded rod 53. The bottom end of the second servo motor 51 drives the threaded rod 53 to rotate. The center of the threaded rod 53 is relatively sleeved with a temperature detection component 54 and a power supply component 55. The temperature detection component 54 and the power supply component 55 are synchronously lifted and lowered relative to each other in the threaded rod 53. The power supply component 55 supplies power to drive the silicon carbide device 4 to operate. The temperature detection component 54 can perform temperature detection on the operating silicon carbide device 4. When the top end of the rear side of the temperature detection component 54 rises, it drives the linkage component 6 to operate. The linkage component 6 synchronously drives the ejection mechanism 7 to operate. The ejection mechanism 7 includes a drive frame 71 and a push assembly 72. The push assembly 72 is installed inside the top of the drive frame 71. The linkage component 6 can drive the drive frame 71 to operate and then drive the push assembly 72 to push the limiting clamp 32 and the silicon carbide device 4 out of the top of the fixing component 31.

[0031] As a further feature of the present invention, there are a total of twenty-two groups of clamping mechanisms 3 that are fixed around the side of the sprocket group 23, and the top of a single group of clamping mechanisms 3 clamps the silicon carbide device 4 in the direction facing outward, and the fixing assembly 31 includes a C-shaped block 311 and a protruding block 312, the C-shaped block 311 is fixed on the side of the sprocket group 23, the front end of the C-shaped block 311 is fixed with a protruding block 312, the center of the protruding block 312 is fixed with a vertical rod 313, the bottom end of the vertical rod 313 is embedded with a ball 314 that moves on the table of the operating table 1, the top of the vertical rod 313 is fixed with a horizontal plate 315, and the front end of the horizontal plate 315 is provided with square grooves 316 at the top and bottom, and the limiting clamp 32 includes two groups of L-shaped blocks 321 and U-shaped blocks 322, the rear ends of the two groups of L-shaped blocks 321 are relatively fixed in the square groove 316 at the front end of the cross plate 315, the front ends of the two groups of L-shaped blocks 321 are fixed with U-shaped blocks 322, the inner two walls of the U-shaped blocks 322 are fixed with rubber clamping blocks 323, the front bottom side of the U-shaped blocks 322 is fixed with a fixing plate 324, the center of the fixing plate 324 is installed with two groups of auxiliary pins 325, the center of the two groups of rubber clamping blocks 323 clamps the silicon carbide device 4, the main pin 41 installed at the bottom end of the silicon carbide device 4 is inserted into the top of the auxiliary pin 325, and this design is beneficial to the rapid installation and detection of the silicon carbide device, reducing labor and reducing safety hazards.

[0032] As a further feature of the present invention, a signal receiver 52 is installed at the top of the second servo motor 51, auxiliary slide bars 56 are inserted at both sides of the rear ends of the temperature detection component 54 and the power supply component 55, the temperature detection component 54 includes an upper long barrel nut 541 and an upper support frame 542, the upper long barrel nut 541 is threadedly inserted on the upper side of the threaded rod 53, the upper support frame 542 is fixedly installed on the side of the upper long barrel nut 541, a first tooth plate 543 is fixedly installed on the left side of the rear end of the upper support frame 542, a connecting plate 544 is fixedly installed at the front end of the upper support frame 542, an infrared thermal imager 545 is installed at the front end of the connecting plate 544, and a connecting line 546 is provided at the top of the infrared thermal imager 545 to connect to the controller 547, the controller 547 is installed on the top of the operating table 1, and a signal transmitter 548 is installed at the front end of the controller 547. The power supply component 55 includes a lower long barrel nut 551 and a lower support frame 552. The lower long barrel nut 551 is threadedly inserted on the bottom side of the threaded rod 53, and the lower support frame 552 is fixed on the side of the lower long barrel nut 551. A mounting plate 553 is fixed at the front end of the lower support frame 552, and a power box 554 is installed on the top of the mounting plate 553. The power box 554 controls the current to supply power to the power supply pin 556 through the current controller 555 at the top. This design is beneficial to the detection of damaged devices and can drive the ejection mechanism to eject the damaged devices, which is convenient, fast and easy to operate.

[0033] Furthermore, the linkage assembly 6 includes a first belt group 61 and a first rotating shaft 62. The bottom end of the first belt group 61 is installed on the upper side of the driving frame 71, and the upper side of the first belt group 61 is installed on the right end of the first rotating shaft 62. The front end of the second belt group 64 is installed in the center of the first rotating shaft 62, and the rear end of the second belt group 64 is installed in the center of the second rotating shaft 65. The right end of the second rotating shaft 65 is fixed with a first gear 66, and the rear end of the first gear 66 engages with the front end of the first tooth plate 543. The left ends of the first rotating shaft 62 and the second rotating shaft 65 are both inserted into the right wall of the limit block 63. Through this design, the ejection mechanism can be driven to work under the drive of the linkage mechanism when the monitoring mechanism is in operation, which is beneficial to reducing energy consumption and improving efficiency.

[0034] As a further feature of the present invention, the driving frame 71 includes a vertical block 711 and a side plate 712. The side plates 712 are fixedly provided on the left and right sides of the top of the vertical block 711. A rotating rod 713 is inserted into the center of the two groups of side plates 712. The center of the rotating rod 713 is fixedly provided with a second gear 714. The left end of the rotating rod 713 is installed with the bottom end of the first belt group 61. The pushing component 72 includes a square tube 721 and a T-shaped slide rail 723. The square tube 721 is installed at the center of the top of the vertical block 711. A square notch 722 is provided at the connection between the top center of the square tube 721 and the second gear 714. A T-shaped slide rail 723 is fixedly provided at the bottom end of the inner part of the square tube 721. A T-shaped slide block 724 is sleeved inside the T-shaped slide rail 723. A second tooth plate 725 is fixedly provided at the top of the T-shaped slide block 724. An extension rod 726 is fixedly provided at the rear end of the second tooth plate 725. This device can reduce manual picking time and improve detection efficiency.

[0035] Working principle: During operation, when it is necessary to inspect the silicon carbide device 4, first clamp the two sides of the front end of a group of silicon carbide devices 4 inside the rubber clamping blocks 323 on the two walls inside the U-shaped block 322, then align the two groups of main pins 41 installed at the bottom of the silicon carbide device 4 and insert them on the top of the two groups of auxiliary pins 325 installed in the center of the fixed plate 324, and then start the first servo motor 21 to drive the main drive shaft 22 to rotate. The rotation of the main drive shaft 22 can drive the sprocket set 23 to rotate gradually clockwise. When the sprocket set 23 drives the front C-shaped block 311 and the front fixed The protruding block 312 moves synchronously. When the protruding block 312 moves, the vertical rod 313 with a ball 314 installed at the bottom can drive the limit clamp 32 to move, and then the silicon carbide devices 4 can be installed in sequence. When a group of silicon carbide devices 4 moves to the center of the rear detection mechanism 5, since the first servo motor 21 rotates a certain distance clockwise at intervals, it is convenient for two adjacent groups of clamping mechanisms 3 to move the same distance. When a group of silicon carbide devices 4 stops, the second servo motor 51 can be powered on to drive the threaded rod 53 to rotate, and the threaded rod 53 rotates When the upper and lower long barrel nut 541 and the lower long barrel nut 551 are moved synchronously toward the center, the lower long barrel nut 551 rises to drive the lower support frame 552 and the mounting plate 553 to rise, and the mounting plate 553 rises to drive the power box 554 at the top to rise, and the power box 554 rises to drive the current controller and the power supply pin 556 at the top to rise and connect and drive the auxiliary pin 325 at the bottom of the fixing plate 324. When the silicon carbide device 4 is powered on, the upper long barrel nut 541 can drive the upper support frame 542 and the connecting plate 544 to descend, and the connecting plate 544 can be connected. The connection plate 544 descends to drive the infrared thermal imager 545 at the front end to descend. When the infrared thermal imager 545 descends, the temperature of the silicon carbide device 4 can be detected. When the temperature of the silicon carbide device 4 continues to operate after the maximum power output, the data can be transmitted to the controller 547 through the connection line 546 at the top, and then the second servo motor 51 is operated through the signal transmitter 548 to work. The second servo motor 51 operates to separate the temperature detection component 54 and the power supply component 55 from the silicon carbide device 4, and then the next group of silicon carbide devices 4 are detected;

[0036] During operation, when a damaged silicon carbide device 4 is detected, it is only necessary to control the second servo motor 51 to rotate and control the temperature detection component 54 to rise a certain distance, and then the first toothed plate 543 fixed to the upper support frame 542 rises to engage with the first gear 66 fixed to the right end of the second rotating shaft 65 to rotate. The rotation of the first gear 66 can drive the second rotating shaft 65 to rotate. The rotation of the second rotating shaft 65 can drive the first rotating shaft 62 to rotate through the second belt group 64. The rotation of the first rotating shaft 62 can drive the bottom rotating rod 713 to rotate vertically through the first belt group 61. The top side plate 712 of the block 711 rotates, and the rotating rod 713 rotates to drive the second gear 714 fixed in the center to engage with the second tooth plate 725 in the bottom square tube 721 and move backward. The second tooth plate 725 moves in the T-shaped slide rail 723 through the fixed T-shaped slider 724. When the second tooth plate 725 and the extension rod 726 fixed at the rear end move backward, the limit clamp 32 and the silicon carbide device 4 can be pushed to fall to the rear side of the table top of the operating table 1. Then, the second servo motor 51 is started and restarted to detect the next group of silicon carbide devices 4.

[0037] It should be noted that the electrical components appearing in this application document are all electrically connected to the external main controller and 220V AC power, and the main controller can be a conventional known device that controls a servo motor, contact sensor, processor, alarm module and drive module. The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part are connected by conventional means such as mature bolts, rivets, welding, etc. in the prior art. In addition, the machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, so no specific description will be made here.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A reliability detection device for a silicon carbide power device, comprising an operating table (1) and a feeding mechanism (2), wherein the feeding mechanism (2) is installed at the center of the table top of the operating table (1), the feeding mechanism (2) comprises a first servo motor (21), a main drive shaft (22) and a sprocket group (23), the first servo motor (21) drives the main drive shaft (22) to drive the sprocket group (23) to rotate, and the sprocket group (23) is installed at the center of the table top of the operating table (1) to rotate, characterized in that: Twenty-two groups of clamping mechanisms (3) are fixedly provided on the side of the sprocket group (23), and the clamping mechanisms (3) include a fixing component (31) and a limiting clamp (32). The limiting clamp (32) is embedded in the front side of the top end of the fixing component (31), and the front end of the limiting clamp (32) clamps a silicon carbide device (4). The bottom end of the silicon carbide device (4) is provided with a main pin (41), and the main pin (41) is inserted into the bottom side of the limiting clamp (32). A detection mechanism (5) is installed on the right rear side of the operating table (1), and the detection mechanism (5) includes a second servo motor (51) and a threaded rod (53). The bottom end of the second servo motor (51) drives the threaded rod (53) to rotate, and the center of the threaded rod (53) is relatively sleeved with a temperature detection component (54) and a power supply component ( 55), the temperature detection component (54) and the power supply component (55) are synchronously lifted and lowered relative to each other in the threaded rod (53), the power supply component (55) supplies power to drive the silicon carbide device (4) to operate, the temperature detection component (54) can detect the temperature of the operating silicon carbide device (4), and when the rear top end of the temperature detection component (54) rises, it drives the linkage component (6) to operate, and the linkage component (6) synchronously drives the push-out mechanism (7) to operate, the push-out mechanism (7) comprises a drive frame (71) and a push-out component (72), the top end of the drive frame (71) is internally installed with the push-out component (72), and the linkage component (6) can drive the drive frame (71) to operate and then drive the push-out component (72) to push the limit clamp (32) and the silicon carbide device (4) out of the top end of the fixing component (31).

2. A reliability detection device for silicon carbide power devices according to claim 1, characterized in that: There are a total of twenty-two groups of the clamping mechanisms (3) which are fixed around the sides of the sprocket group (23), and the top end of a single group of the clamping mechanisms (3) clamps the silicon carbide device (4) in a direction facing outwards.

3. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The fixing assembly (31) comprises a C-shaped block (311) and a protruding block (312); the C-shaped block (311) is fixedly mounted on the side of the sprocket assembly (23); the protruding block (312) is fixedly mounted at the front end of the C-shaped block (311); a vertical rod (313) is fixedly mounted at the center of the protruding block (312); a ball (314) is embedded at the bottom end of the vertical rod (313) and moves on the tabletop of the operating table (1); a horizontal plate (315) is fixedly mounted at the top end of the vertical rod (313); and square grooves (316) are formed at the upper and lower ends of the front end of the horizontal plate (315).

4. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The limiting clamp (32) comprises two groups of L-shaped blocks (321) and a U-shaped block (322); the rear ends of the two groups of L-shaped blocks (321) are relatively fixedly arranged in the square groove (316) at the front end of the horizontal plate (315); the front ends of the two groups of L-shaped blocks (321) are fixedly arranged with a U-shaped block (322); the inner two walls of the U-shaped block (322) are fixedly arranged with a rubber clamping block (323); the bottom side of the front end of the U-shaped block (322) is fixedly arranged with a fixing plate (324); the center of the fixing plate (324) is mounted with two groups of auxiliary pins (325); the center of the two groups of rubber clamping blocks (323) clamps the silicon carbide device (4); the main pin (41) mounted at the bottom end of the silicon carbide device (4) is inserted into the top end of the auxiliary pin (325).

5. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: A signal receiver (52) is installed at the top end of the second servo motor (51), and auxiliary sliding rods (56) are inserted at both sides of the rear ends of the temperature detection component (54) and the power supply component (55).

6. A reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The temperature detection component (54) comprises an upper long-barrel nut (541) and an upper support frame (542); the upper long-barrel nut (541) is threadedly inserted on the upper side of the threaded rod (53); the upper support frame (542) is fixedly mounted on the side of the upper long-barrel nut (541); a first tooth plate (543) is fixedly mounted on the left side of the rear end of the upper support frame (542); a connecting plate (544) is fixedly mounted on the front end of the upper support frame (542); an infrared thermal imager (545) is mounted on the front end of the connecting plate (544); a connecting line (546) is mounted on the top end of the infrared thermal imager (545) to connect to a controller (547); the controller (547) is mounted on the top end of the operating table (1); and a signal transmitter (548) is mounted on the front end of the controller (547).

7. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The power supply assembly (55) comprises a lower long-barrel nut (551) and a lower support frame (552); the lower long-barrel nut (551) is threadedly inserted on the bottom side of the threaded rod (53); the lower support frame (552) is fixedly mounted on the side of the lower long-barrel nut (551); a mounting plate (553) is fixedly mounted on the front end of the lower support frame (552); a power supply box (554) is mounted on the top end of the mounting plate (553); the power supply box (554) controls the current to supply power to the power supply pin (556) through a current controller (555) at the top end.

8. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The linkage assembly (6) comprises a first belt group (61) and a first rotating shaft (62); the bottom end of the first belt group (61) is mounted on the upper side of the driving frame (71); the upper side of the first belt group (61) is mounted on the right end of the first rotating shaft (62); the front end of the second belt group (64) is mounted on the center of the first rotating shaft (62); the rear end of the second belt group (64) is mounted on the center of the second rotating shaft (65); a first gear (66) is fixedly disposed on the right end of the second rotating shaft (65); the rear end of the first gear (66) meshes with the front end of the first toothed plate (543); and the left ends of the first rotating shaft (62) and the second rotating shaft (65) are both inserted into the right wall of the limit block (63).

9. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The driving frame (71) comprises a vertical block (711) and side panels (712). The side panels (712) are fixedly provided on the left and right sides of the top of the vertical block (711). A rotating rod (713) is inserted into the center of the two sets of side panels (712). A second gear (714) is fixedly provided at the center of the rotating rod (713). The bottom end of the first belt group (61) is mounted on the left end of the rotating rod (713).

10. The reliability detection device for silicon carbide power devices according to claim 1, characterized in that: The pushing assembly (72) comprises a square tube (721) and a T-shaped slide rail (723); the square tube (721) is mounted at the top center of the vertical block (711); a square notch (722) is provided at the connection between the top center of the square tube (721) and the second gear (714); a T-shaped slide rail (723) is fixedly arranged at the bottom end of the square tube (721); a T-shaped slide block (724) is sleeved inside the T-shaped slide rail (723); a second tooth plate (725) is fixedly arranged at the top of the T-shaped slide block (724); and an extension rod (726) is fixedly arranged at the rear end of the second tooth plate (725).

Images