Universal test equipment for power device

Abstract

The utility model discloses universal test equipment for power devices. The universal test equipment comprises a rack, a test base which is fixedly arranged at the bottom of the rack and is provided with a test circuit, and a pressing unit which is assembled on the rack, wherein the pressing unit comprises a connecting rod mechanism assembled on the rack and a pressing tool which is detachably arranged on the connecting rod mechanism and can move towards the test base under the control of the connecting rod mechanism so as to press the power device on the test base. According to the utility model, the power device can be compressed on the test base through the compression unit, so that a tester can always press the power device without a tool, thereby improving the test efficiency and ensuring the accuracy of a test result; in addition, power devices of different sizes can be adapted by replacing a pressing tool in the pressing unit. The device is suitable for being used in performance tests of power devices such as high-power diodes, thyristors, silicon controlled rectifiers, IGBTs, MOSFETs and the like.

Description

Technical Field

[0001] The utility model relates to a performance test for power devices such as high-power diodes, thyristors, thyristors, IGBTs and MOSFETs, and specifically relates to a universal test device for power devices. Background Art

[0002] Currently, when testing power devices (such as high-power diodes, thyristors, thyristors, IGBTs, and MOSFETs), the tester is required to manually press the power device with a wooden stick or other insulating object. This pressure must be maintained throughout the test to ensure a good electrical connection between the power device and the test circuit. If only one tester is performing the test, they may not be able to simultaneously press the power device when operating the device or performing other actions. This may result in poor contact between the power device and the test circuit, thus affecting the test results.

[0003] Furthermore, when testing high-power devices, a significant amount of heat is generated within the device. Overheating can significantly impact performance. However, the current air cooling method cannot meet the heat dissipation requirements of high-power devices. Utility Model Content

[0004] In order to solve the above deficiencies in the prior art, the present invention aims to provide a universal testing device for power devices, so that a single operator can complete the power device testing work.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a universal test equipment for power devices, comprising a frame, a test base fixed to the bottom of the frame and provided with a test circuit, and a clamping unit assembled on the frame; wherein the clamping unit comprises a connecting rod mechanism assembled on the frame, and a pressing tool detachably arranged on the connecting rod mechanism and capable of moving toward the test base under the control of the connecting rod mechanism to press the power device onto the test base.

[0006] As a limitation of the present invention, it also includes a water cooling plate fixed on the frame and in contact with the bottom of the test base, and the water outlet and water inlet of the water cooling plate are connected to an external water cooling machine through pipelines.

[0007] As another limitation of the present invention, the pressing tool comprises a mounting plate fixedly mounted on the connecting rod mechanism, a mounting seat detachably mounted on the bottom of the mounting plate, and a plurality of anti-static rods mounted on the mounting seat;

[0008] The assembly position of the anti-static rod on the mounting base corresponds to the fin position of the power device.

[0009] As a further limitation of the present invention, the mounting plate is a transparent acrylic plate.

[0010] As a further limitation of the present invention, the antistatic rod is a PEI rod.

[0011] As a third limitation of the present invention, the connecting rod mechanism includes an operating handle, a first connecting rod, a second connecting rod and a third connecting rod; the operating handle includes an integrally formed handle portion and a hook portion; the first connecting rod is fixed to the frame and includes, from top to bottom, an integrally formed oblique rod, a vertical rod and a sleeve, wherein the end of the oblique rod is hinged to the end of the hook portion of the operating handle; one end of the second connecting rod is hinged to the middle of the hook portion of the operating handle, and the other end is hinged to the third connecting rod; the third connecting rod is inserted into the sleeve of the first connecting rod and is arranged in the vertical direction;

[0012] The bottom end of the third connecting rod is fixedly connected to the pressing tooling.

[0013] As a further limitation of the present invention, a slide bar assembly for guiding is provided on both sides of the frame and the connecting rod mechanism; the slide bar assembly includes a slide bar fixed vertically on the frame and a slider slidably assembled on the slide bar;

[0014] The slide block is fixedly connected to the pressing fixture.

[0015] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] (1) The present invention uses a connecting rod mechanism to achieve a downward pressing action, so that the downward pressing tool can press the power device tightly against the test base with the test circuit, thereby achieving a good electrical connection between the power device and the test circuit. Compared with the traditional testing process, the present invention does not require the use of other equipment or continuous pressing. Only one tester is required to complete the power device testing work, which simplifies the testing operation of the power device and can effectively improve the test efficiency and the accuracy of the test results.

[0017] In addition, the pressing tool in the present invention is detachably connected to the connecting rod mechanism, and can be adapted to power devices of various sizes by replacing the pressing tool, which has higher adaptability.

[0018] (2) This utility model adopts a water-cooling heat dissipation method. By setting a water cooling plate at the bottom of the test base, the heat generated during the power device test can be effectively and fully dissipated, thereby ensuring the good performance of the power device during the test. Compared with the air-cooling heat dissipation method, this utility model has a simpler structure and better heat dissipation effect.

[0019] (3) The mounting plate in the press-down fixture of the present invention adopts a transparent acrylic plate, which enables visualization of the contact between the anti-static rod and the fins of the power device.

[0020] (4) The anti-static rod in the pressing tool of the utility model is made of PEI material, which is an anti-static material and has a certain hardness. The material price is reasonable and the material supply is simple. The anti-static rod formed can have a long service life.

[0021] (5) In the present invention, slide rod assemblies are provided on both sides of the connecting rod mechanism, which can ensure that the pressing tool moves up and down in the vertical direction when the connecting rod mechanism is pressed down, thereby ensuring the accuracy of the anti-static rod in the pressing tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0024] Figure 2 This is a structural diagram of a compression unit in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the disassembled structure of the connecting rod mechanism in the embodiment of the present utility model;

[0026] Figure 4 This is a structural diagram of the pressing tool in the embodiment of the present utility model;

[0027] Figure 5 This is a schematic structural diagram of the pressing fixture, the test base, and the water-cooling plate in an embodiment of the present invention;

[0028] In the figure: 1. Rack; 2. Test base; 3. Water cooling plate; 4. Clamping unit; 5. Power device; 6. Water outlet; 7. Water inlet; 8. Connecting rod mechanism; 9. Pressing fixture; 10. Operating handle; 11. First connecting rod; 12. Second connecting rod; 13. Third connecting rod; 14. Handle part; 15. Hook part; 16. Oblique rod; 17. Vertical rod; 18. Sleeve; 19. Connecting plate; 20. Screw; 21. Mounting plate; 22. Mounting seat; 23. Anti-static rod; 24. Slide rod; 25. Slider. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention and are not intended to limit the present invention.

[0030] This embodiment discloses a universal testing device for power devices, such as Figure 1As shown, the apparatus comprises a rack 1, a test base 2, a water-cooling plate 3, and a pressing unit 4 mounted on the rack 1. This embodiment can press the power device 5 against the test base 2 via the pressing unit 4, eliminating the need for test personnel to constantly press the power device 5 using tools, thereby improving test efficiency and ensuring the accuracy of test results. This embodiment can also accommodate power devices 5 of different sizes by replacing the pressing fixture 9 in the pressing unit 4. This embodiment can also achieve water cooling and heat dissipation via the water-cooling plate 3, thereby improving heat dissipation efficiency and ensuring the performance of the power device 5.

[0031] Specifically, such as Figure 1 As shown, the rack 1 is used to assemble components such as a test base 2, a water-cooling plate 3 and a pressing unit 4 into one body.

[0032] The test base 2 is used to carry the power device 5 to be tested, such as Figure 1 As shown, the test base 2 is fixed to the bottom of the frame 1, and a test circuit corresponding to the power device 5 to be tested is welded on the test base 2. It should be noted that, depending on the actual situation, the test circuit can also be set on the test base 2 by non-welding methods, such as press-fitting, PCB (printed circuit board), 3D printing circuit, etc.

[0033] The water cooling plate 3 is used to cool the power device 5 during the test. Figure 1 and Figure 5 As shown, the water-cooling plate 3 is fixed to the frame 1, with its upper surface in contact with the bottom surface of the test base 2. In this embodiment, the water-cooling plate 3 is fixed to the test base 2 by screws. The water outlet 6 and water inlet 7 of the water-cooling plate 3 are both provided on the lower surface and extend downward into the cavity at the bottom of the frame 1, enabling communication with an external water chiller via pipes.

[0034] The pressing unit 4 is used to press the power device 5 onto the test base 2 so that the power device 5 can maintain good electrical contact with the test circuit on the test base 2. Figures 1 to 3 As shown, the pressing unit 4 includes a connecting rod mechanism 8 assembled on the frame 1 and a pressing tool 9 detachably provided on the connecting rod mechanism 8 . When the connecting rod mechanism 8 is pulled down, the pressing tool 9 moves toward the test base 2 to press the power device 5 onto the test base 2 .

[0035] More specifically, the link mechanism 8 includes an operating handle 10, a first link 11, a second link 12, and a third link 13. Figure 3 As shown, the operating handle 10 includes an integrally formed handle portion 14 and a hook portion 15; the first connecting rod 11 includes an integrally formed oblique rod 16, a vertical rod 17 and a sleeve 18 from top to bottom; the second connecting rod 12 is two sheet-shaped straight rods arranged opposite to each other; and the third connecting rod 13 is a columnar straight rod. Figure 1 As shown, the vertical rod 17 of the first connecting rod 11 is fixed on the frame 1, as shown in FIG. Figure 2 As shown, the free end of the inclined rod 16 is hinged to the end of the hook portion 15 of the operating handle 10; one end of the second connecting rod 12 is hinged to the middle of the hook portion 15 of the operating handle 10, and the other end is hinged to the top of the third connecting rod 13; the third connecting rod 13 is inserted into the sleeve 18 of the first connecting rod 11. During use, pulling down the handle portion 14 of the operating handle 10 can control the third connecting rod 13 to move vertically downward in the sleeve 18; pulling up the handle portion 14 of the operating handle 10 can control the third connecting rod 13 to move vertically upward in the sleeve 18.

[0036] In this embodiment, a connecting plate 19 is fixed to the bottom end of the third connecting rod 13, and a plurality of screws 20 are assembled below the connecting plate 19 to be fixedly connected to the pressing tool 9. Figure 2 shown.

[0037] The pressing tool 9 includes a mounting plate 21, a mounting seat 22 and a plurality of anti-static rods 23. Figure 4 As shown, the mounting base 22 is detachably mounted on the mounting plate 21 by screws, and a plurality of slots are provided on the mounting base 22. The anti-static rods 23 are assembled on the mounting base 22 through the slots, and the distribution positions of the plurality of anti-static rods 23 on the mounting base 22 correspond to the fin positions of the power device 5 on the test base 2. In actual use, by replacing the mounting base 22 with a different slot arrangement and assembling a corresponding number of anti-static rods 23, power devices 5 of different sizes can be adapted. Figure 2 As shown, the mounting plate 21 is fixedly connected to the connecting plate 19 at the bottom end of the third connecting rod 13 through the above-mentioned screw rod 20 to realize the assembly of the pressing tool 9 on the connecting rod mechanism 8.

[0038] In this embodiment, the mounting plate 21 is a transparent acrylic plate. The transparent structure allows the user to observe whether the anti-static rod 23 is in precise contact with the fins of the power device 5 when pressing down. The anti-static rod 23 is a PEI rod, which is anti-static and has a certain hardness. Figure 4 As shown, the diameter of the end portion of the anti-static rod 23 for contacting the fin of the power device 5 is smaller than the diameter of the body thereof.

[0039] In order to ensure that the pressing tool 9 can move smoothly up and down in the vertical direction, in this embodiment, a slide bar assembly for guidance is provided on both sides of the connecting rod mechanism 8. Figure 1 As shown, the slide bar assembly includes a slide bar 24 vertically fixed on the frame 1 and a slider 25 slidably assembled on the slide bar 24 , and the slider 25 is fixedly connected to the mounting plate 21 in the pressing fixture 9 .

[0040] When using this embodiment, first select the appropriate mounting base 22 and anti-static rod 23 according to the power device 5 to be tested, and assemble them on the connecting rod mechanism 8 through the mounting plate 21; then place the power device 5 on the test base 2, pull down the handle portion 14 of the operating handle 10, and control the downward movement of the pressing tool 9 to press down the fins of the power device 5 through the anti-static rod 23, thereby establishing an electrical connection between the power device 5 and the test circuit on the test base 2, and testing the power device 5. Under the action of the connecting rod mechanism 8 and the gravity of the pressing tool 9, the anti-static rod 23 can always press the power device 5 against the test circuit, so that the tester does not need to constantly pull down the operating handle 10 during the test.

[0041] During the test, cold water is circulated in the water cooling plate 3 by a water chiller to achieve water cooling and heat dissipation of the power device 5 .

[0042] After the test is completed, the handle portion 14 of the operating handle 10 is lifted to control the pressing tool 9 to move vertically upward, so that the power device 5 on the test base 2 can be removed for replacement.

[0043] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A universal test equipment for power devices, characterized by: It includes a frame, a test base fixed to the bottom of the frame and provided with a test circuit, and a clamping unit assembled on the frame; wherein the clamping unit includes a connecting rod mechanism assembled on the frame, and a pressing tool detachably arranged on the connecting rod mechanism and capable of moving toward the test base under the control of the connecting rod mechanism to press the power device on the test base.

2. A universal power device testing device according to claim 1, characterized in that: It also includes a water cooling plate fixed on the frame and in contact with the bottom of the test base, and the water outlet and water inlet of the water cooling plate are connected to an external water cooling machine through pipelines.

3. A universal power device testing device according to claim 1 or 2, characterized in that: The pressing tooling comprises a mounting plate fixed on the connecting rod mechanism, a mounting seat detachably arranged at the bottom of the mounting plate, and a plurality of anti-static rods assembled on the mounting seat; The assembly position of the anti-static rod on the mounting base corresponds to the fin position of the power device.

4. The universal power device testing device according to claim 3, characterized in that: The mounting plate is a transparent acrylic plate.

5. The universal testing equipment for power devices according to claim 4, characterized in that: The anti-static rod is a PEI rod.

6. A universal power device testing device according to any one of claims 1, 2, 4, and 5, characterized in that: The connecting rod mechanism includes an operating handle, a first connecting rod, a second connecting rod, and a third connecting rod; the operating handle includes an integrally formed handle portion and a hook portion; the first connecting rod is fixed to the frame and includes, from top to bottom, an integrally formed oblique rod, a vertical rod, and a sleeve, wherein the end of the oblique rod is hinged to the end of the hook portion of the operating handle; one end of the second connecting rod is hinged to the middle of the hook portion of the operating handle, and the other end is hinged to the third connecting rod; the third connecting rod is inserted into the sleeve of the first connecting rod and is arranged in the vertical direction; The bottom end of the third connecting rod is fixedly connected to the pressing tooling.

7. The universal testing equipment for power devices according to claim 6, characterized in that: A guide slide assembly is provided on both sides of the frame and the connecting rod mechanism; the slide assembly includes a slide rod fixed vertically on the frame and a slider slidably assembled on the slide rod; The slide block is fixedly connected to the pressing fixture.

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