A device for testing IGBT modules

Abstract

The present invention relates to the technical field of IGBT module testing, and discloses a device for testing IGBT modules, including a workbench, the bottom of the workbench has a support frame for supporting the workbench, the inner side of the workbench has a detection head, the outer side of the detection head has a control unit, the control unit is used to control the position of the detection head, the outer side of the workbench has a clamping part, the bottom of the clamping part is connected to the recovery part; the clamping part includes: a clamping plate fixed to the outer surface of the workbench, the inner side of the clamping plate has a positioning piece; a connecting rod, movably arranged inside the clamping plate, and the outer side of the connecting rod has a clamping block. The device for testing IGBT modules provided by the present invention can be used to test IGBT modules, and compared with ordinary testing devices, the testing device provided by the present invention has the advantages of being able to easily fix and clamp the module and to detect unqualified products.

Description

Technical Field

[0001] The present invention relates to the technical field of IGBT module testing, and in particular to a device for testing an IGBT module. Background Art

[0002] IGBT (Insulated Gate Bipolar Transistor), insulated gate bipolar transistor, is a composite fully controlled voltage-driven power semiconductor device composed of BJT (bipolar junction transistor) and MOS (insulated gate field effect transistor). It has the advantages of high input impedance of MOSFET (metal oxide semiconductor field effect transistor) and low on-state voltage drop of GTR (power transistor).

[0003] The IGBT module is a modular semiconductor product that is packaged by IGBT (insulated gate bipolar transistor chip) and FWD (freewheeling diode chip) through a specific circuit bridge. The packaged IGBT module is directly used in inverters, UPS uninterruptible power supplies and other equipment.

[0004] The clamping of the LGBT module is unstable during processing, and the unqualified modules cannot be quickly recovered during testing. Manual recovery of the modules is required, which is troublesome and inconvenient for processing and use. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a device for testing IGBT modules, which has the advantages of being able to easily fix and clamp the modules and to remove unqualified modules in the event of unqualified modules. The device is used to solve the problems in the prior art that the clamping of the LGBT modules is unstable during processing, the unqualified modules cannot be quickly recovered during testing, and the modules need to be recovered manually, which is troublesome and inconvenient for processing and use.

[0007] (II) Technical solution

[0008] The present invention provides the following technical solution: a device for testing an IGBT module, comprising a workbench, the bottom of the workbench is provided with a support frame for supporting the workbench, the inner side of the workbench is provided with a detection head, the outer side of the detection head is provided with a control unit, the control unit is used to control the position of the detection head, the outer side of the workbench is provided with a clamping unit, and the bottom of the clamping unit is connected to a recovery unit;

[0009] The clamping portion comprises:

[0010] A clamping plate, fixed to the outer surface of the workbench, wherein the inner side of the clamping plate is provided with a positioning piece;

[0011] A connecting rod is movably arranged inside the clamping plate, and a clamping block is provided on the outer side of the connecting rod;

[0012] A vortex spring is installed between the clamp block and the connecting rod; and

[0013] A limiting protrusion is used to limit the clamping block, and the limiting protrusion is located on the outer surface of the clamping block.

[0014] The device for testing IGBT modules provided by the present invention can be used to test IGBT modules, and compared with ordinary testing devices, the testing device provided by the present invention has the advantages of being able to easily fix and clamp the module and to recover unqualified modules in the event of unqualified modules. It is used to solve the problems in the prior art that the clamping of the LGBT module is unstable during processing, unqualified modules cannot be quickly recovered during testing, and manual recovery of the modules is required, which is troublesome and inconvenient for processing and use.

[0015] In a possible embodiment, the outer surface of the clamp has a rubber sheet, the rubber sheet is fixed to the outer surface of the clamp, the positioning passes through the clamp and extends to the inside of the clamp, and the positioning sheet is fixed to the outer surface of the connecting rod, the clamp block is sleeved on the outside of the connecting rod, and the outer and inner sides of the vortex spring are respectively fixed to the outer surface of the connecting rod and the inner wall of the clamp block.

[0016] In a possible embodiment, the outer surface of the limiting protrusion contacts the clamping plate, and the limiting protrusion can limit the clamping block. The bottom of the positioning plate has a support spring, one end of the support spring is fixed to the outer surface of the workbench, and the other end of the support spring is fixed to the outer surface of the positioning plate.

[0017] In a possible implementation, the recovery unit includes:

[0018] A winding reel is movably arranged inside the workbench, and a motor is provided inside the winding reel;

[0019] A connecting rope is fixed inside the winding drum, and a push plate is provided on the outer side of the connecting rope;

[0020] The ejector rod is movably inserted into the interior of the workbench.

[0021] In a possible embodiment, the motor is fixed inside the workbench, the winding reel is mounted on the output end of the motor, the push plate is fixed to the outer surface of the connecting rope, the connecting rope is wrapped around the outer surface of the winding reel, and one end of the connecting rope is fixed to the outer surface of the clamping block.

[0022] In a possible embodiment, there is a hydraulic pipe between the push plate and the push rod, the hydraulic pipe is fixed inside the workbench, and the push plate and the push rod are both inserted into the hydraulic pipe. There is hydraulic oil between the push plate and the push rod. When the connecting rope is wound up, the push plate can drive the push plate to move, and the movement of the push plate can drive the push rod to move. The push rod is arranged between the clamping plates.

[0023] In a possible implementation, a recovery rack is provided on the inner side of the workbench, the recovery rack is fixed to the inner wall of the workbench, and a guide rail is provided on one side of the recovery rack, and the guide rail is opened inside the workbench.

[0024] In a possible implementation, the control unit includes:

[0025] A detection frame is arranged on the inner side of the workbench, and a lifting rod is provided between the detection frame and the workbench;

[0026] The positioning block is fixed to the outer surface of the detection frame and is used for contacting the IGBT module.

[0027] In a possible implementation, the detection head is movably connected to the inner side of the detection frame, an electromagnet is provided between the detection head and the detection frame, the electromagnet is fixed inside the detection frame, a control board is provided on one side of the detection head, and the control board is fixed to the outer surface of the detection head.

[0028] In a possible implementation, the electromagnet can attract the control board, the inner side of the positioning block is inclined, and the detection frame is movably mounted on the outer surface of the lifting rod, and the lifting rod is fixed to the inner wall of the workbench.

[0029] Compared with the prior art, the present invention provides a device for testing an IGBT module, which has the following beneficial effects:

[0030] 1. The present invention is provided with a clamping part for clamping and fixing the module during use, which can facilitate the stable clamping of the module, thereby ensuring the stability during the detection process, ensuring that the detection can be carried out stably, and can also install and fix the module very conveniently, further shortening the time consumed in clamping and disassembling.

[0031] 2. The present invention provides a recycling unit that can quickly recycle unqualified parts after testing the module, which can facilitate the stable recycling of unqualified modules, thereby ensuring that when unqualified modules appear, they can be automatically recycled to reduce the trouble of manual recycling, and further ensure.

[0032] 3. The present invention is provided with a control unit that can stably align with the module during use, so that when the module is tested, the position of the detection head can be positioned by using the positioning block, and the position of the detection head can be controlled during use, so that the processing test can be stably performed.

[0033] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of a device for testing an IGBT module provided by the present invention;

[0035] Figure 2 A cross-sectional view of a detection frame of a device for testing an IGBT module provided by the present invention;

[0036] Figure 3 A cross-sectional view of a clamping plate structure of a device for testing an IGBT module provided by the present invention;

[0037] Figure 4 A partial structural side sectional view of a device for testing an IGBT module provided by the present invention;

[0038] Figure 5 A schematic diagram of the structural position of a recovery rack of a device for testing IGBT modules provided by the present invention;

[0039] Figure 6 A partial side sectional view of a clamping plate structure of a device for testing an IGBT module provided by the present invention.

[0040] Among them: 1 workbench, 2 support frame, 3 detection head, 21 positioning piece, 22 clamping plate, 23 connecting rod, 24 clamping block, 25 limiting protrusion, 26 vortex spring, 27 rubber sheet, 28 support spring, 31 winding disk, 32 motor, 33 connecting rope, 34 push plate, 35 hydraulic pipe, 36 push rod, 37 recovery frame, 38 guide rail, 41 detection frame, 42 electromagnet, 43 control board, 44 lifting rod, 45 positioning block. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] like Figure 1-6 As shown, the present invention provides a device for testing an IGBT module, comprising a workbench 1, a support frame 2 for supporting the workbench 1 is provided at the bottom of the workbench 1, a detection head 3 is provided on the inner side of the workbench 1, a control unit is provided on the outer side of the detection head 3, the control unit is used to control the position of the detection head 3, a clamping unit is provided on the outer side of the workbench 1, and the bottom of the clamping unit is connected to the recovery unit;

[0044] The clamping part includes:

[0045] A clamping plate 22 is fixed to the outer surface of the workbench 1, and a positioning piece 21 is provided on the inner side of the clamping plate 22;

[0046] A connecting rod 23 is movably disposed inside the clamping plate 22, and a clamping block 24 is disposed outside the connecting rod 23; a vortex spring 26 is installed between the clamping block 24 and the connecting rod 23; and

[0047] The limiting protrusion 25 is used to limit the clamping block 24 , and the limiting protrusion 25 is located on the outer surface of the clamping block 24 .

[0048] The device for testing IGBT modules provided by the present invention can be used to test IGBT modules, and compared with ordinary testing devices, the testing device provided by the present invention has the advantages of being able to easily fix and clamp the module and to recover unqualified modules in the event of unqualified modules. It is used to solve the problems in the prior art that the clamping of the LGBT module is unstable during processing, unqualified modules cannot be quickly recovered during testing, and manual recovery of the modules is required, which is troublesome and inconvenient for processing and use.

[0049] In a possible embodiment, the outer surface of the clamp 22 has a rubber sheet 27, which is fixed to the outer surface of the clamp 22, and the positioning sheet 21 passes through the clamp 22 and extends to the inside of the clamp 22, and the positioning sheet 21 is fixed to the outer surface of the connecting rod 23, the clamp block 24 is sleeved on the outside of the connecting rod 23, and the outer and inner sides of the vortex spring 26 are respectively fixed to the outer surface of the connecting rod 23 and the inner wall of the clamp block 24.

[0050] In the present invention, the clamp block 24 can use the elasticity of the rubber sheet 27 to increase the friction between the module and the module, thereby ensuring stability during clamping and fixing. The clamp block 24 is in the initial state when clamping the module, and the clamp block 24 will also twist the vortex spring 26 after being opened.

[0051] In a possible embodiment, the outer surface of the limiting protrusion 25 contacts the clamping plate 22, and the limiting protrusion 25 can limit the clamping block 24. The bottom of the positioning plate 21 has a support spring 28, one end of the support spring 28 is fixed to the outer surface of the workbench 1, and the other end of the support spring 28 is fixed to the outer surface of the positioning plate 21.

[0052] In the present invention, under the action of the support spring 28 , the positioning piece 21 can drive the connecting rod 23 to be located at the upper end position, and then the limiting protrusion 25 can be used for stable limitation.

[0053] In a possible implementation, the recovery unit includes:

[0054] A winding reel 31 is movably disposed inside the workbench 1, and a motor 32 is disposed inside the winding reel 31;

[0055] A connecting rope 33 is fixed inside the winding drum 31, and a push plate 34 is provided on the outer side of the connecting rope 33;

[0056] The push rod 36 is movably inserted into the interior of the workbench 1 .

[0057] In the present invention, the motor 32 drives the winding disk 31 to move, thereby winding the connecting rope 33, and the movement of the connecting rope 33 pulls the push plate 34, and the push plate 34 is used to push the top rod 36 to move.

[0058] In a possible embodiment, the motor 32 is fixed inside the workbench 1, the winding drum 31 is sleeved on the output end of the motor 32, the push plate 34 is fixed to the outer surface of the connecting rope 33, the connecting rope 33 is wound around the outer surface of the winding drum 31, and one end of the connecting rope 33 is fixed to the outer surface of the clamping block 24.

[0059] In the present invention, the connecting rope 33 can be retracted after the motor 32 drives the winding drum 31 to rotate, thereby being able to drive the clamping plate 22 to move in position.

[0060] In a possible embodiment, there is a hydraulic pipe 35 between the push plate 34 and the push rod 36, the hydraulic pipe 35 is fixed inside the workbench 1, and the push plate 34 and the push rod 36 are both inserted into the hydraulic pipe 35, and there is hydraulic oil between the push plate 34 and the push rod 36. When the connecting rope 33 is wound up, the push plate 34 can drive the push plate 34 to move, and the movement of the push plate 34 can push the push rod 36 to move. The push rod 36 is arranged between the clamps 22.

[0061] In the present invention, the movement of the push plate 34 can squeeze the hydraulic oil inside the hydraulic pipe 35. After the hydraulic oil is squeezed, the push rod 36 is lifted up, so that the push rod 36 pushes the module to move, thereby achieving the purpose of lifting the module, so that stable recovery can be performed.

[0062] In a possible implementation, a recovery rack 37 is provided on the inner side of the workbench 1 , the recovery rack 37 is fixed to the inner wall of the workbench 1 , and a guide rail 38 is provided on one side of the recovery rack 37 , and the guide rail 38 is opened inside the workbench 1 .

[0063] In the present invention, the guide rail 38 can discharge unqualified modules, thereby ensuring stability during the discharge process and reducing collisions of the modules.

[0064] In a possible implementation, the control unit includes:

[0065] The detection frame 41 is arranged on the inner side of the workbench 1, and a lifting rod 44 is provided between the detection frame 41 and the workbench 1;

[0066] The positioning block 45 is fixed to the outer surface of the detection frame 41 and is used to contact the IGBT module.

[0067] In the present invention, the lifting rod 44 can control the position of the detection frame 41, so that the detection head 3 inside the detection frame 41 can be easily contacted with the module to perform a stable test.

[0068] In a possible implementation, the detection head 3 is movably clamped on the inner side of the detection frame 41, an electromagnet 42 is provided between the detection head 3 and the detection frame 41, the electromagnet 42 is fixed inside the detection frame 41, and a control board 43 is provided on one side of the detection head 3, and the control board 43 is fixed on the outer surface of the detection head 3.

[0069] In the present invention, the detection head 3 can move inside the detection frame 41 , and under the action of gravity, the detection head 3 can contact the module, so that the module can be detected accordingly.

[0070] In a possible implementation, the electromagnet 42 can attract the control board 43 , the inner side of the positioning block 45 is tilted, and the detection frame 41 is movably mounted on the outer surface of the lifting rod 44 , and the lifting rod 44 is fixed to the inner wall of the workbench 1 .

[0071] In the present invention, the electromagnet 42 can control the position of the detection head 3 after the control board 43 is attracted, so that the position of the detection head 3 can be controlled, thereby facilitating the control of the position of the detection head 3 and then ensuring stable detection of the detection head 3.

[0072] The inner side of the detection frame 41 has an inverted T-shaped sliding groove, and the lifting rod 44 is restricted by the sliding groove, so that the detection frame 41 can move relative to the lifting rod 44.

[0073] In addition, the present invention also provides a method for using the device for testing the IGBT module. When in use, the module is placed on the surface of the positioning piece 21, and the module is pressed to make the module press the positioning piece 21 to move downward. After the positioning piece 21 is pressed downward, the restriction of the limit protrusion 25 is opened, and then the clamping block 24 is swung under the action of the vortex spring 26 to clamp the module. Then the lifting rod 44 moves to control the position of the detection frame 41, so that the detection frame 41 is pressed downward. After the electromagnet 42 is energized, the electromagnet 42 can attract the control board 43, so that the control board 43 drives the detection head 3 to move, so that the detection head 3 moves and retracts, and the detection head 3 extending outward is connected with the module. The module is tested by touching the lifting rod 44, and when the module is qualified after the test is completed, the lifting rod 44 retracts to make the inspection frame 41 rise, and then the clamping block 24 is opened manually to make the limit protrusion 25 break away from the restriction of the clamping plate 22, so as to remove the module. When the test is completed and it is unqualified, the motor 32 rotates to drive the winding disk 31 to reel in, and after the connecting rope 33 is reeled in, the push plate 34 is mobilized to move, and the push plate 34 moves to squeeze the hydraulic pipe 35, so that the internal hydraulic oil is pushed, so that the push rod 36 is lifted up, and after the connecting rope 33 is reeled in, the clamping block 24 is driven to move, so that the clamping block 24 is opened, and after the push rod 36 is lifted up, the module can be recovered to the inside of the recovery frame 37 and slide down through the guide rail 38.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0075] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0076] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

Claims

1. A device for testing an IGBT module, comprising a workbench (1), the bottom of the workbench (1) having a support frame (2) for supporting the workbench (1), the inner side of the workbench (1) having a detection head (3), characterized in that: The outer side of the detection head (3) is provided with a control part, the control part is used to control the position of the detection head (3), the outer side of the workbench (1) is provided with a clamping part, and the bottom of the clamping part is connected to the recovery part; The clamping portion comprises: A clamping plate (22) is fixed to the outer surface of the workbench (1), and a positioning piece (21) is provided on the inner side of the clamping plate (22); A connecting rod (23) is movably arranged inside the clamping plate (22), and a clamping block (24) is provided on the outside of the connecting rod (23); A vortex spring (26) is installed between the clamping block (24) and the connecting rod (23); and a limiting protrusion (25) for limiting the position of the clamping block (24), the limiting protrusion (25) being located on the outer surface of the clamping block (24), the outer surface of the limiting protrusion (25) being in contact with the clamping plate (22), the limiting protrusion (25) being capable of limiting the position of the clamping block (24), the bottom of the positioning sheet (21) being provided with a supporting spring (28), one end of the supporting spring (28) being fixed to the outer surface of the workbench (1), and the other end of the supporting spring (28) being fixed to the outer surface of the positioning sheet (21); The outer surface of the clamping plate (22) has a rubber sheet (27), and the rubber sheet (27) is fixed to the outer surface of the clamping plate (22). The positioning sheet (21) passes through the clamping plate (22) and extends into the interior of the clamping plate (22), and the positioning sheet (21) is fixed to the outer surface of the connecting rod (23). The clamping block (24) is sleeved on the outer side of the connecting rod (23), and the outer side and the inner side of the vortex spring (26) are respectively fixed to the outer surface of the connecting rod (23) and the inner wall of the clamping block (24).

2. A device for testing an IGBT module according to claim 1, characterized in that: The recovery unit comprises: A winding reel (31) is movably arranged inside the workbench (1), and a motor (32) is provided inside the winding reel (31); A connecting rope (33) is fixed inside the winding drum (31), and a push plate (34) is provided on the outer side of the connecting rope (33); A push rod (36) is movably inserted into the interior of the workbench (1).

3. A device for testing an IGBT module according to claim 2, characterized in that: The motor (32) is fixed inside the workbench (1), the winding reel (31) is sleeved on the output end of the motor (32), the push plate (34) is fixed to the outer surface of the connecting rope (33), the connecting rope (33) is wound around the outer surface of the winding reel (31), and one end of the connecting rope (33) is fixed to the outer surface of the clamping block (24).

4. The device for testing an IGBT module according to claim 3, characterized in that: A hydraulic pipe (35) is provided between the push plate (34) and the push rod (36). The hydraulic pipe (35) is fixed inside the workbench (1), and the push plate (34) and the push rod (36) are both plugged into the hydraulic pipe (35). Hydraulic oil is provided between the push plate (34) and the push rod (36). When the connecting rope (33) is wound up, the push plate (34) can be driven to move. The movement of the push plate (34) can push the push rod (36) to move. The push rod (36) is arranged between the clamping plates (22).

5. The device for testing an IGBT module according to claim 1, characterized in that: The inner side of the workbench (1) is provided with a recovery rack (37), the recovery rack (37) being fixed to the inner wall of the workbench (1), and one side of the recovery rack (37) is provided with a guide rail (38), the guide rail (38) being opened inside the workbench (1).

6. The device for testing an IGBT module according to claim 1, characterized in that: The control unit includes: A detection frame (41) is arranged on the inner side of the workbench (1), and a lifting rod (44) is provided between the detection frame (41) and the workbench (1); A positioning block (45) is fixed to the outer surface of the detection frame (41) and is used to contact the IGBT module.

7. The device for testing an IGBT module according to claim 6, characterized in that: The detection head (3) is movably clamped on the inner side of the detection frame (41); an electromagnet (42) is provided between the detection head (3) and the detection frame (41); the electromagnet (42) is fixed inside the detection frame (41); a control board (43) is provided on one side of the detection head (3); and the control board (43) is fixed on the outer surface of the detection head (3).

8. The device for testing an IGBT module according to claim 7, characterized in that: The electromagnet (42) is capable of attracting the control panel (43), the inner side of the positioning block (45) is inclined, and the detection frame (41) is movably sleeved on the outer surface of the lifting rod (44), and the lifting rod (44) is fixed to the inner wall of the workbench (1).

Images