Insulation and voltage resistance testing device for IGBT module

Abstract

The utility model discloses an insulated gate bipolar translator (IGBT) module insulation and voltage resistance testing device, which relates to the field of IGBT module testing and comprises an equipment mounting rack, a conveying carrying disc, a conveying line, a stopping device, a jacking positioning device, a robot device, a carrying device, a testing device and an insulation and voltage resistance instrument, and the conveying carrying disc, the conveying line, the stopping device, the jacking positioning device, the robot device, the carrying device, the testing device and the insulation and voltage resistance instrument are mounted on the equipment mounting rack. The conveying loading disc is used for loading an IGBT module to be tested, the conveying line is used for transporting the conveying loading disc, the stopping device is used for stopping the conveying loading disc on the conveying line, and the jacking and positioning device is used for jacking and positioning the stopped conveying loading disc; the robot device is used for carrying the IGBT module between the conveying carrying disc and the carrying device; the carrying device is used for carrying the IGBT module to the position below the testing device, the testing device is used for conducting insulation and voltage resistance testing on the IGBT module, and the testing device is connected with an insulation and voltage resistance instrument. The IGBT module insulation and voltage resistance testing device has the advantage that the insulation and voltage resistance testing efficiency of the IGBT module is improved.

Description

Technical Field

[0001] The utility model relates to the field of IGBT module testing, in particular to an IGBT module insulation withstanding voltage testing device. Background Art

[0002] As a new type of power semiconductor field-controlled self-turn-off device, IGBT (Insulated Gate Bipolar Transistor) integrates the low resistance of power MOS (Metal Oxide Semiconductor) field-effect transistor and bipolar device, and has characteristics such as high input impedance, low voltage-controlled power consumption, simple control circuit, high voltage resistance, and large current-carrying capacity, and is widely used in various power conversions. To meet safety requirements, these devices need to follow corresponding specifications during electrical design and production processes, and each IGBT module needs to be detected. Insulation withstanding voltage testing is the most important means of detection and evaluation for safety design.

[0003] Currently, most of the insulation withstanding voltage tests on the market are manual loading and unloading using fixtures for testing. For example, an IGBT insulation withstanding voltage test fixture disclosed in the patent document with the publication number of CN218181014U. The continuity of production and the cleanliness of the module cannot be guaranteed in this way, and the efficiency is too low, affecting the detection efficiency of IGBT modules. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is how to improve the insulation withstanding voltage test efficiency of IGBT modules.

[0005] The utility model solves the above technical problems through the following technical means: an IGBT module insulation withstanding voltage testing device, including an equipment installation bench and a conveying carrier, a conveying line, a stopping device, a jacking and positioning device, a robot device, a handling device, a testing device, and an insulation withstanding voltage tester installed on the equipment installation bench; the conveying carrier is used to load the IGBT module to be tested, the conveying line is used to transport the conveying carrier, the stopping device is used to stop the conveying carrier on the conveying line, and the jacking and positioning device is used to jack up and position the stopped conveying carrier; the robot device is used to carry the IGBT module between the conveying carrier and the handling device; the handling device is used to carry the IGBT module under the testing device, and the testing device is used to perform insulation withstanding voltage testing on the IGBT module, and the testing device is connected to the insulation withstanding voltage tester.

[0006] As an optimized technical solution, the conveyor line includes a support frame, a conveyor motor, a driving synchronous pulley, a synchronous belt, a synchronous idler pulley, a transmission shaft, a tensioning pulley, a conveyor belt and an opposed photoelectric sensor; the conveyor motor is installed on the support frame, and a driving synchronous pulley is installed on the output shaft of the conveyor motor; the transmission shaft is rotatably connected to the support frame, and a synchronous idler pulley is installed on the transmission shaft; the synchronous belt is wound around the driving synchronous pulley and the synchronous idler pulley; the transmission shaft is drivingly connected to the conveyor belt through the tensioning pulley; an opposed photoelectric sensor is provided at the loading position of the conveyor line.

[0007] As an optimized technical solution, the stopping device includes a fixed seat, a stopping cylinder, a cylinder connecting plate and a stopping block; the stopping cylinder is installed on the fixed seat, the cylinder connecting plate is installed on the moving end of the stopping cylinder, and the stopping block is installed on the cylinder connecting plate.

[0008] As an optimized technical solution, the lifting and positioning device includes a fixed bracket, a linear bearing, a guiding shaft, a lifting cylinder, a lifting plate and a positioning pin; the fixed bracket is provided with a linear bearing, and the guiding shaft is movably fitted in the linear bearing; the lifting cylinder is installed on the fixed bracket, the lifting plate is installed on the moving end of the lifting cylinder and is fixedly connected to the guiding shaft; a positioning pin is installed on the lifting plate, and a positioning hole corresponding to the positioning pin is provided on the conveying carrier tray. The conveying carrier tray is accurately positioned by the lifting and positioning device, so that the robot device can accurately clamp the IGBT module.

[0009] As an optimized technical solution, the lifting and positioning device further includes a supporting soft pad, and the supporting soft pad is installed on one side of the lifting plate facing the conveying carrier tray.

[0010] As an optimized technical solution, the robot device includes a base, a robot, a connecting member, an electric gripper, a first diffuse reflection photoelectric sensor and a laser ranging photoelectric sensor; the robot is installed on the base, and the electric gripper, the first diffuse reflection photoelectric sensor and the laser ranging photoelectric sensor are respectively installed at the end of the robot through the connecting member.

[0011] As an optimized technical solution, the handling device includes a fixing plate, a linear guide rail, a starting proximity switch, a second diffuse reflection photoelectric sensor, a handling cylinder, a sliding table and a terminal proximity switch; the linear guide rail, the starting proximity switch, the second diffuse reflection photoelectric sensor, the handling cylinder and the terminal proximity switch are all installed on the fixing plate, and the sliding table is installed on the linear guide rail; the handling cylinder is used to drive the sliding table to move along the linear guide rail; the starting proximity switch and the terminal proximity switch are respectively arranged at the starting position and the testing position of the handling device; the second diffuse reflection photoelectric sensor is arranged at the starting position of the handling device.

[0012] As an optimized technical solution, the handling device further includes a starting limit device and a terminal limit device, and the starting limit device and the terminal limit device are respectively arranged at the starting position and the testing position of the handling device.

[0013] As an optimized technical solution, the testing device includes a fixing frame, a press, a pre-pressing plate, a pre-pressing fixture, an insulating fixture mounting plate, an insulating testing fixture, and a downward pressing cylinder; the pre-pressing plate and the insulating fixture mounting plate are arranged in sequence from top to bottom and are respectively movably fitted on the fixing frame; the press is mounted on the fixing frame, the pre-pressing plate is mounted on the moving end of the press, the pre-pressing fixture is mounted on the pre-pressing plate and passes through the insulating fixture mounting plate; the downward pressing cylinder is mounted on the equipment mounting bench, the insulating fixture mounting plate is mounted on the moving end of the downward pressing cylinder, and the insulating testing fixture is mounted on the insulating fixture mounting plate and is connected to the insulating withstand voltage tester.

[0014] As an optimized technical solution, there are two sets of the handling device and the testing device respectively, and there are two loading positions on the conveyor line, and the two sets of handling devices and testing devices are respectively used for corresponding to the two loading positions.

[0015] The advantages of the present utility model are as follows: through the mutual cooperation of the conveying carrier, the conveyor line, the stopping device, the jacking and positioning device, the robot device, the handling device, the testing device, and the insulating withstand voltage tester, the insulating withstand voltage testing efficiency of the IGBT module is improved, the defect rate of manual operation is reduced, and the safety is improved. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the IGBT module insulating withstand voltage testing device according to the embodiment of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of the conveyor line according to the embodiment of the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the stopping device according to the embodiment of the present utility model.

[0019] Figure 4 It is a schematic structural diagram of the jacking and positioning device according to the embodiment of the present utility model.

[0020] Figure 5 It is a schematic structural diagram of the robot device according to the embodiment of the present utility model.

[0021] Figure 6 It is a schematic structural diagram of the handling device according to the embodiment of the present utility model.

[0022] Figure 7 It is a schematic structural diagram of the testing device according to the embodiment of the present utility model. Detailed Embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in combination with the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0024] As Figure 1 shown, an insulation withstand voltage test device for an IGBT module disclosed in an embodiment of the present utility model includes an equipment installation bench 1 and a conveying carrier 2, a conveying line 3, a stopping device 4, a lifting and positioning device 5, a robot device 6, a barcode scanner 7, a handling device 8, a test device 9, and an insulation withstand voltage tester 10 installed on the equipment installation bench 1.

[0025] The conveying carrier 2 is used to load the IGBT module to be tested, and a two-dimensional code for recording module information is provided on the IGBT module; the conveying line 3 is used to transport the conveying carrier 2, the stopping device 4 is used to stop the conveying carrier 2 on the conveying line 3, and the lifting and positioning device 5 is used to lift and position the stopped conveying carrier 2; the robot device 6 is used to transfer the IGBT module among the conveying carrier 2, the barcode scanner 7, and the handling device 8; the barcode scanner 7 is used to scan the two-dimensional code on the IGBT module to complete the recording of module information; the handling device 8 is used to transfer the IGBT module under the test device 9, and the test device 9 is used to perform an insulation withstand voltage test on the IGBT module, and the test device 9 is connected to the insulation withstand voltage tester 10.

[0026] As Figure 2As shown in the figure, the conveying line 3 includes a support frame 31, a conveying motor 32, a driving synchronous pulley 33, a synchronous belt 34, a synchronous idler pulley 35, a transmission shaft 36, a tensioning pulley 37, a conveyor belt 38 and an opposed photoelectric sensor 39; the support frame 31 is installed on the equipment installation bench 1; the conveying motor 32 is a speed-regulating motor, the conveying motor 32 is installed on the support frame 31, and a driving synchronous pulley 33 is installed on the output shaft of the conveying motor 32; the transmission shaft 36 is rotatably connected to the support frame 31, and a synchronous idler pulley 35 is installed on the transmission shaft 36; the synchronous belt 34 is wound around the driving synchronous pulley 33 and the synchronous idler pulley 35; the conveyor belt 38 is a flat belt, and the transmission shaft 36 is drivingly connected to the conveyor belt 38 through the tensioning pulley 37; the conveying motor 32 drives the driving synchronous pulley 33 to rotate, the driving synchronous pulley 33 drives the synchronous idler pulley 35 to rotate through the synchronous belt 34, thereby driving the transmission shaft 36 to rotate, and the transmission shaft 36 drives the conveyor belt 38 to move and adjust the tension of the conveyor belt 38 through the tensioning pulley 37, so as to realize the conveyor belt 38 driving the conveying carrier 2 to move; there are two loading positions on the conveying line 3, and opposed photoelectric sensors 39 are respectively arranged at each loading position, and the opposed photoelectric sensors 39 are used to detect whether there is a conveying carrier 2 at the loading position.

[0027] As Figure 3 shown in the figure, a stop device 4 is arranged at the loading position of the conveying line 3, and the stop device 4 includes a fixed seat 41, a stop cylinder 42, a cylinder connecting plate 43 and a stop block 44; the fixed seat 41 is installed on the equipment installation bench 1; the stop cylinder 42 is a double-rod cylinder, and the stop cylinder 42 is installed on the fixed seat 41; the cylinder connecting plate 43 is installed on the moving end of the stop cylinder 42, and the stop block 44 is installed on the cylinder connecting plate 43; when the moving end of the stop cylinder 42 rises, the stop block 44 is driven to rise through the cylinder connecting plate 43, and the conveying carrier 2 transported on the conveying line 3 is stopped by the stop block 44.

[0028] As Figure 4 shown in the figure, a jacking and positioning device 5 is arranged at the loading position of the conveying line 3, and the jacking and positioning device 5 includes a fixed bracket 51, a linear bearing 52, a guide shaft 53, a jacking cylinder 54, a jacking plate 55, a positioning pin 56 and a support soft pad 57; the fixed bracket 51 is installed on the equipment installation bench 1; linear bearings 52 are respectively installed at the four corners of the fixed bracket 51, and guide shafts 53 are respectively movably fitted in the linear bearings 52; the jacking cylinder 54 is installed at the middle position of the fixed bracket 51, the jacking plate 55 is installed on the moving end of the jacking cylinder 54 and is fixedly connected to the guide shafts 53; a positioning pin 56 is installed on the jacking plate 55, and a positioning hole corresponding to the positioning pin 56 is arranged on the conveying carrier 2. When the moving end of the jacking cylinder 54 rises, the positioning pin 56 is driven to rise through the jacking plate 55, and the positioning pin 56 can jack up and position the stopped conveying carrier 2; a support soft pad 57 is installed on one side of the jacking plate 55 facing the conveying carrier 2, and the support soft pad 57 is used to prevent the jacking plate 55 from wearing the conveying carrier 2.

[0029] As shown Figure 5 in the figure, the robot device 6 includes a base 61, a robot 62, a connecting member 63, an electric gripper 64, a first diffuse reflection photoelectric sensor 65, and a laser ranging photoelectric sensor 66; the base 61 is installed on the equipment installation bench 1, the robot 62 is a four-axis robot, the robot 62 is installed on the base 61, and the electric gripper 64, the first diffuse reflection photoelectric sensor 65, and the laser ranging photoelectric sensor 66 are respectively installed at the end of the robot 62 through the connecting member 63; the robot 62 is used to control the movement of the electric gripper 64, the electric gripper 64 is used to grip the IGBT module, the first diffuse reflection photoelectric sensor 65 is used to detect the presence or absence of the IGBT module, and the laser ranging photoelectric sensor 66 can judge whether the IGBT module is placed properly by performing two distance measurements.

[0030] As shown Figure 6 in the figure, the handling device 8 includes a fixing plate 81, a linear guide 82, a starting limit device 83, a starting proximity switch 84, a second diffuse reflection photoelectric sensor 85, a handling cylinder 86, a sliding table 87, a terminal limit device 88, and a terminal proximity switch 89; the fixing plate 81 is installed on the equipment installation bench 1; the linear guide 82, the starting limit device 83, the starting proximity switch 84, the second diffuse reflection photoelectric sensor 85, the handling cylinder 86, the terminal limit device 88, and the terminal proximity switch 89 are all installed on the fixing plate 81, and the sliding table 87 is installed on the linear guide 82; the handling cylinder 86 is a rodless cylinder, and the handling cylinder 86 is used to drive the sliding table 87 to move along the linear guide 82 to transport the IGBT module placed on the sliding table 87 under the test device 9; the starting limit device 83 and the terminal limit device 88 are respectively arranged at the starting position and the test position of the handling device 8 to improve the positioning accuracy of the sliding table 87; the starting proximity switch 84 and the terminal proximity switch 89 are respectively arranged at the starting position and the test position of the handling device 8 to provide a transport signal and a stop signal for the sliding table 87; the second diffuse reflection photoelectric sensor 85 is arranged at the starting position of the handling device 8 to check whether the IGBT module is placed.

[0031] As shown Figure 7As shown in the figure, the test device 9 is arranged at the test position of the handling device 8. The test device 9 includes a fixing frame 91, a press 92, a pre-pressing plate 93, a pre-pressing fixture 94, an insulating fixture mounting plate 95, an insulating test fixture 96 and a downward pressing cylinder 97. The fixing frame 91 is installed on the equipment installation bench 1. The pre-pressing plate 93 and the insulating fixture mounting plate 95 are arranged successively from top to bottom and are respectively movably fitted on the fixing frame 91. The press 92 is a servo press. The press 92 is installed on the fixing frame 91. The pre-pressing plate 93 is installed at the moving end of the press 92. The pre-pressing fixture 94 is installed on the pre-pressing plate 93 and passes through the insulating fixture mounting plate 95. The press 92 can drive and control the pre-pressing fixture 94 to press on the IGBT module to simulate the actual installation pressure of the IGBT module. The downward pressing cylinder 97 is installed on the equipment installation bench 1. The insulating fixture mounting plate 95 is installed at the moving end of the downward pressing cylinder 97. The insulating test fixture 96 is installed on the insulating fixture mounting plate 95 and is connected to the insulation withstand voltage tester 10 through a wire. The downward pressing cylinder 97 can drive the insulating test fixture 96 to press downwards so that the probe of the insulating test fixture 96 contacts the pins of the IGBT module to test the insulation withstand voltage characteristics of the IGBT module, and the test signal is transmitted to the insulation withstand voltage tester 10.

[0032] There are two sets of handling devices 8 and test devices 9 respectively. The two sets of handling devices 8 and test devices 9 respectively correspond to two loading positions, which reduces the waiting time of the robot device 6, reduces the operation rhythm of the whole equipment, and improves the detection efficiency.

[0033] The test method using the IGBT module insulation withstand voltage test device includes the following steps:

[0034] Step 1: Place four IGBT modules on the conveying carrier 2. When the conveying line 3 transports the conveying carrier 2 to the loading position, the stop device 4 stops the conveying carrier 2, and the jacking and positioning device 5 jacks up and positions the stopped conveying carrier 2.

[0035] Step 2: The robot device 6 transports the first IGBT module on the jacked-up conveying carrier 2 to the scanner 7 for scanning to complete the module information recording.

[0036] Step 3: The robot device 6 transports the scanned IGBT module to the starting position of the handling device 8, and the handling device 8 transports the IGBT module to the test position.

[0037] Step 4: The test device 9 conducts an insulation withstand voltage test on the IGBT module, and the test signal is transmitted to the insulation withstand voltage tester 10.

[0038] Step 5: After the insulation withstand voltage test is completed, the test device 9 leaves the IGBT module. The handling device 8 transports the IGBT module back to the starting position, and the robot device 6 transports the IGBT module that has returned to the starting position back to the jacked-up conveying carrier 2.

[0039] Step 6: Repeat the operation processes of Step 2 to Step 5 four times. After the testing of each IGBT module on the lifted conveying tray 2 is completed in sequence, the lifting and positioning device 5 brings the conveying tray 2 back to its original position, the stopping device 4 withdraws, and the conveying line 3 transports the conveying tray 2 to the next testing process.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An IGBT module insulation withstand voltage test device, characterized in that: It includes an equipment installation stand and a conveyor tray, a conveyor line, a stopping device, a lifting and positioning device, a robot device, a handling device, a testing device and an insulation withstand voltage tester installed on the equipment installation stand; the conveyor tray is used to load the IGBT module to be tested, the conveyor line is used to transport the conveyor tray, the stopping device is used to stop the conveyor tray on the conveyor line, and the lifting and positioning device is used to lift and position the stopped conveyor tray; the robot device is used to transport the IGBT module between the conveyor tray and the handling device; the handling device is used to transport the IGBT module to the testing device, the testing device is used to perform an insulation withstand voltage test on the IGBT module, and the testing device is connected to the insulation withstand voltage tester.

2. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The conveyor line includes a support frame, a conveying motor, a driving synchronous wheel, a synchronous belt, a synchronous idler wheel, a transmission shaft, a tensioning wheel, a conveyor belt and a photoelectric system; the conveying motor is installed on the support frame; the output shaft of the conveying motor is installed with a driving synchronous wheel, the transmission shaft is rotatably connected to the support frame, the transmission shaft is installed with a synchronous idler wheel, and the synchronous belt is wound around the driving synchronous wheel and the synchronous idler wheel; the transmission shaft is connected to the conveyor belt through a tensioning wheel; the loading position of the conveyor line is provided with a photoelectric system.

3. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The stopping device comprises a fixing seat, a stopping cylinder, a cylinder connecting plate and a stop block, wherein the stopping cylinder is mounted on the fixing seat, the cylinder connecting plate is mounted on the moving end of the stopping cylinder, and the stop block is mounted on the cylinder connecting plate.

4. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The lifting and positioning device includes a fixed bracket, a linear bearing, a guide shaft, a lifting cylinder, a lifting plate and a positioning pin; a linear bearing is installed on the fixed bracket, and a guide shaft is movably fitted in the linear bearing; the lifting cylinder is installed on the fixed bracket, and the lifting plate is installed on the moving end of the lifting cylinder and fixedly connected to the guide shaft; a positioning pin is installed on the lifting plate, and a positioning hole corresponding to the positioning pin is provided on the conveying carrier.

5. The IGBT module insulation withstand voltage test device according to claim 4, characterized in that: The lifting and positioning device also includes a supporting cushion, and a supporting cushion is installed on the side of the lifting plate facing the conveying carrier.

6. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The robot device includes a base, a robot, a connecting piece, an electric gripper, a first diffuse reflection photoelectric and a laser ranging photoelectric. The robot is installed on the base, and the electric gripper, the first diffuse reflection photoelectric and the laser ranging photoelectric are respectively installed at the ends of the robot through connecting pieces.

7. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The transport device includes a fixed plate, a linear guide, a starting proximity switch, a second diffuse reflection photoelectric, a transport cylinder, a slide and a terminal proximity switch; the linear guide, the starting proximity switch, the second diffuse reflection photoelectric, the transport cylinder and the terminal proximity switch are all installed on the fixed plate, the slide is installed on the linear guide, and the transport cylinder is used to drive the slide to move along the linear guide; the starting proximity switch and the terminal proximity switch are respectively arranged at the starting position and the test position of the transport device; the second diffuse reflection photoelectric is arranged at the starting position of the transport device.

8. The IGBT module insulation withstand voltage test device according to claim 7, characterized in that: The handling device further comprises a starting limit device and a terminal limit device, wherein the starting limit device and the terminal limit device are respectively arranged at a starting position and a testing position of the handling device.

9. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The testing device includes a fixed frame, a press, a pre-pressing plate, a pre-pressing jig, an insulating jig mounting plate, an insulating test jig and a pressing cylinder; the pre-pressing plate and the insulating jig mounting plate are arranged in sequence from top to bottom and are movably matched on the fixed frame respectively; the press is installed on the fixed frame, the pre-pressing plate is installed on the moving end of the press, the pre-pressing jig is installed on the pre-pressing plate and passes through the insulating jig mounting plate; the pressing cylinder is installed on the equipment mounting stand, the insulating jig mounting plate is installed on the moving end of the pressing cylinder, and the insulating test jig is installed on the insulating jig mounting plate and connected to the insulating withstand voltage instrument.

10. The IGBT module insulation withstand voltage test device according to claim 1, characterized in that: The transport device and the testing device are each provided with two groups, the conveying line is provided with two loading positions, and the two groups of transport devices and the testing device are respectively used to correspond to the two loading positions.

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