Double-station test instrument for synchronously measuring radian of bottom plate of IGBT (insulated gate bipolar transistor) module

Abstract

The utility model provides a double-station test instrument for synchronously measuring the radian of a bottom plate of an IGBT (Insulated Gate Bipolar Translator) module, which comprises a frame assembly, an operation panel part, a driving part, a positioning and pressing clamp part, a baffle plate and a switch. Collected data are amplified and converted into communication data to be read by an upper computer, the upper computer reads, calculates and compares the data and then outputs and displays the data on a display screen of an operation panel, and the radian of the bottom plate is detected before the IGBT module is installed, so that the qualified rate of the IGBT module is guaranteed, the IGBT module can be correctly installed in the later period, and the installation efficiency is improved. The positioning and pressing clamp part is arranged in the frame assembly, accurate positioning of the IGBT module bottom plates is ensured, taking and placing of the IGBT module bottom plates are facilitated, the pressing clamp part can automatically position and press the tested IGBT module bottom plates, the two IGBT module bottom plates can be measured at the same time, and the two IGBT module bottom plates can be independently replaced at any time.

Description

[Technical field]

[0001] The utility model relates to the technical field of IGBT modules, in particular to a testing instrument for synchronously measuring the curvature of an IGBT module bottom plate with double working positions. [Background technology]

[0002] IGBT (Insulated Gate Bipolar Transistor) has the characteristics of high frequency, high voltage, high current, and especially easy to turn on and off. It is internationally recognized as the most representative product of the third revolution in power electronics technology. It has been developed to the sixth generation and commercialized to the fifth generation. At present, IGBT has been widely used in various industries of the national economy.

[0003] At present, the domestic IGBT module industry is in the process of development. The testing technology for small and medium-power IGBT modules is relatively mature, but the production and testing of high-voltage and high-power IGBT modules is in the initial stage of development.

[0004] According to feedback from engineering applications, in engineering applications, the failure rate of high-voltage and high-power IGBTs is much higher than that of low-voltage ones. According to incomplete statistics, more than 90% of medium and high-voltage inverter failures are caused by IGBT failure, and the annual failure rate is relatively high. The reliability of high-power IGBTs has attracted the attention of related domestic industries, and it is very important to improve the reliability of high-power IGBTs. Since the IGBT module baseplate has a curvature, incorrect installation methods may lead to the failure of the IGBT module. In the use of IGBT, the baseplate plays an important role in the heat dissipation of the entire module. The contact plane between the baseplate and the radiator directly affects the uniformity of the IGBT heat dissipation. In order to ensure good heat conduction between the IGBT module baseplate and the radiator, strict requirements are placed on the curvature of the IGBT baseplate.

[0005] Chinese patent CN216717333U discloses a test instrument for quickly testing the curvature of the bottom plate of an IGBT module, characterized in that: it includes a test base, a fixed plate is arranged on the test base, a fixture plate is arranged above the fixed plate, the fixed plate and the fixture plate are fixedly connected by a support column, a positioning unit is arranged on the fixture plate, a sensor unit is arranged on the fixed plate, the sensor unit is arranged vertically and penetrates the fixture plate, so that the top of the sensor unit is exposed from the fixture plate; an electronic screen is arranged on the test base, and the sensor unit is connected to the electronic screen signal; an IGBT module is arranged on the top of the sensor unit, and the positioning unit positions the four sides of the IGBT module; a pressing plate is arranged on the IGBT module, and pressing the pressing plate exerts downward pressure on the IGBT module, so that the bottom plate of the IGBT module approaches the sensor unit, and the sensor unit detects the curvature of the bottom plate of the IGBT module and feeds it back to the electronic screen, which solves the problem of using a high-precision displacement sensor to collect data at multiple positions of the bottom plate of the IGBT module, amplifying the collected data and converting it into communication data for reading by a host computer, and outputting and displaying the data on the electronic screen after data reading, calculation and comparison by the host computer. The present application detects the curvature of the base plate before installing the IGBT module to ensure the qualification rate of the IGBT module, so that the IGBT module can be correctly installed later, avoiding failure of the IGBT module, reducing production and use costs, and ensuring good thermal conductivity between the IGBT module and the heat sink. [Contents of the utility model]

[0006] The utility model aims to solve the above-mentioned technical problems and provides a novel double-station test instrument for synchronously measuring the curvature of the bottom plate of an IGBT module. An air-push displacement sensor is used to collect data from multiple positions of the bottom plate of the IGBT module, and the collected data is amplified and converted into communication data for reading by a host computer. The data is read, calculated and compared by the host computer and then output and displayed on the display screen of the operation panel. The curvature of the bottom plate is detected before the IGBT module is installed to ensure the qualified rate of the IGBT module so that the IGBT module can be correctly installed later. A replaceable positioning and clamping fixture component is arranged in the frame assembly to ensure the accurate positioning of the bottom plate of the IGBT module and facilitate the taking and placing of the bottom plate of the IGBT module. The positioning and clamping fixture component can automatically position and clamp the bottom plate of the IGBT module to be tested, and can measure two bottom plates of IGBT modules at the same time, and the two bottom plates of IGBT modules can be replaced separately at any time.

[0007] The utility model is realized by the following technical solutions:

[0008] A double-station test instrument for synchronously measuring the curvature of an IGBT module bottom plate, comprising a frame assembly, an operation panel assembly, a drive assembly, a positioning and clamping fixture assembly, a baffle, and a switch. An operation panel assembly is provided on one side of the frame assembly, drive assembly are respectively provided on the left and right sides or the rear side of the top of the frame assembly, a positioning and clamping fixture assembly is provided on one side of the drive assembly, the baffle seamlessly fastens the drive assembly and the positioning and clamping fixture assembly on the top of the frame assembly, a plurality of switches are provided on the front side of the top of the frame assembly, and the switches are electrically connected to the drive assembly and the positioning and clamping fixture assembly.

[0009] Furthermore, the frame assembly includes a frame, a middle frame, a cover plate, and a workbench plate. A cavity is provided inside the frame, a middle frame mounting position is provided on the top of the frame, the middle frame is embedded in the middle frame mounting position on the top of the frame, and is seamlessly fastened to the frame. A groove is provided in the middle of the middle frame, a cover plate is provided on the top of the middle frame, a workbench mounting groove is provided in the middle of the cover plate, and a replaceable workbench plate is provided in the workbench mounting groove in the middle of the cover plate.

[0010] As a further feature, the workbench is provided with a plurality of sensor mounting holes, and a plurality of positioning grooves are provided on both sides of the sensor mounting holes.

[0011] As a further feature, a plurality of switch holes are provided on the front top of the cover plate, and the switches are embedded in the switch holes on the front top of the cover plate. The switches are electrically connected to the operation panel component, the drive component, and the positioning and clamping fixture component through wires.

[0012] Further, the driving component includes a linear cylinder, a connecting rod, a fixed block, and a positioning block. The linear cylinder is installed on the top of the left and right sides of the cover plate, one end of the connecting rod is connected to the linear cylinder, and the other end of the connecting rod is connected to the fixed block. A positioning block is provided on the fixed block, and the positioning block is against the positioning and clamping clamp component to prevent the X-axis or Y-axis deviation of the clamping clamp on the positioning and clamping clamp component.

[0013] As a further step, the positioning and clamping fixture component includes a clamping base, a clamping connecting rod, a clamping connecting arm, a clamping plate, a clamping clamp, a clamping positioning column, and a displacement sensor. The clamping base is installed on the top of the rear side of the cover plate, one end of the clamping connecting rod is connected to the clamping base, the other end of the clamping connecting rod is connected to one end of the clamping connecting arm, and the other end of the clamping connecting arm is connected to the clamping plate. A clamping clamp is provided under the clamping plate, and the clamping clamp is placed above the right side of the workbench. One end of the clamping positioning column is inserted into the cavity inside the frame. The other end of the positioning column passes through the positioning groove on the workbench and positions the clamping clamp on the cover plate. One end of the displacement sensor is inserted into the cavity inside the frame, and the other end of the displacement sensor passes through the sensor mounting hole on the workbench and is close to the clamping clamp. The clamping clamp is provided with an IGBT module to be tested. Pressing the clamping plate exerts downward pressure on the IGBT module, so that the bottom plate of the IGBT module approaches the displacement sensor. The displacement sensor detects the curvature of the bottom plate of the IGBT module and feeds back to the operation panel display screen on the operation panel component for display.

[0014] Further, the operation panel component includes an operation panel frame, an operation panel display, an operation panel start button, and an operation panel indicator light. The operation panel frame is installed on the frame. A cavity is provided in the middle of the operation panel frame. The operation panel display is embedded in the cavity in the middle of the operation panel frame. A button hole is provided on the right side of the operation panel frame. An indicator light hole is provided above the button hole. The operation panel start button is embedded in the button hole on the right side of the operation panel frame and is electrically connected to the operation panel display through a wire. The operation panel indicator light is embedded in the indicator light hole on the right side of the operation panel frame and is electrically connected to the operation panel display through a wire.

[0015] As a further feature, a heat dissipation hole is provided at the rear of the frame.

[0016] As a further feature, the clamping plate is in a triangular shape.

[0017] As a further feature, the displacement sensor is a pneumatic displacement sensor.

[0018] The beneficial effects of the utility model are:

[0019] (1) An air-push displacement sensor is used to collect data from multiple positions of the IGBT module base plate, and the collected data is amplified and converted into communication data for reading by the host computer. The host computer reads, calculates and compares the data, and then outputs and displays it on the operation panel display screen. Before installing the IGBT module, the curvature of the base plate is detected to ensure the qualified rate of the IGBT module, so that the IGBT module can be correctly installed later, avoiding the failure of the IGBT module and reducing the production and use costs. The replaceable positioning and clamping fixture component is arranged in the frame assembly to ensure the accurate positioning of the IGBT module base plate and facilitate the placement of the IGBT module base plate. The positioning and clamping fixture component can automatically position and clamp the IGBT module base plate under test, and can measure two IGBT module base plates at the same time, and the two IGBT module base plates can be replaced separately at any time. The two IGBT module base plates can be of the same type or the two IGBT module base plates can be of different types.

[0020] (2) A replaceable workbench plate is provided in the workbench installation groove in the middle of the cover plate, which can quickly replace the IGBT module base plate. When replacing, the positioning clamping module is replaced synchronously;

[0021] (3) There are several switches on the front of the top of the cover, which serve as operation protection. The double switches on the top of the cover start the operation to prevent fingers from being pinched.

Brief Description of the Drawings

[0022] Figure 1 This is a schematic diagram of the structure of a test instrument for synchronously measuring the curvature of the bottom plate of an IGBT module at a dual-station according to the utility model;

[0023] Figure 2 This is a schematic diagram of the exploded structure of a test instrument for synchronously measuring the curvature of the bottom plate of an IGBT module at a dual-station according to the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the frame assembly and the operating panel components of the utility model;

[0025] Figure 4 This is a schematic diagram of the exploded structure of the frame assembly and the operating panel components of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the driving component of the utility model;

[0027] Figure 6 This is a schematic diagram of the exploded structure of the driving component of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the clamping fixture components of the utility model;

[0029] Figure 8 This is a schematic diagram of the exploded structure of the clamping fixture component of the utility model;

[0030] Reference numerals: 1, frame assembly; 11, frame; 110, cavity; 111, middle frame mounting position; 112, heat dissipation hole; 12, middle frame; 120, groove; 13, cover plate; 130, workbench mounting groove; 131, switch hole; 14, workbench plate; 140, sensor mounting hole; 141, positioning groove; 2, operation panel component; 21, operation panel frame; 210, cavity; 211, button hole; 212, indicator light hole ; 22. Operation panel display screen; 23. Operation panel start button; 24. Operation panel indicator light; 3. Driving component; 31. Linear cylinder; 32. Connecting rod; 33. Fixed block; 34. Positioning block; 4. Positioning clamping fixture component; 41. Clamping base; 42. Clamping connecting rod; 43. Clamping connecting arm; 44. Clamping plate; 45. Clamping fixture; 46. Clamping positioning column; 47. Displacement sensor; 5. Baffle; 6. Switch. [Specific implementation method]

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] Refer to Figure 1-8As shown, a double-station test instrument for synchronously measuring the curvature of the bottom plate of an IGBT module includes a frame component 1, an operation panel component 2, a driving component 3, a positioning and clamping fixture component 4, a baffle 5, and a switch 6. An operation panel component 2 is provided on one side of the frame component 1, and driving components 3 are respectively provided on the left and right sides or the rear side of the top of the frame component 1. A positioning and clamping fixture component 4 is provided on one side of the driving component 3. The baffle 5 seamlessly fastens the driving component 3 and the positioning and clamping fixture component 4 on the top of the frame component 1. A plurality of switches 6 are provided on the front of the top of the frame component 1, and the switches 6 are electrically connected to the driving component 3 and the positioning and clamping fixture component 4.

[0035] Preferably, the frame assembly 1 includes a frame 11, a middle frame 12, a cover plate 13, and a workbench 14. A cavity 110 is provided inside the frame 11, a middle frame mounting position 111 is provided at the top of the frame 11, the middle frame 12 is embedded in the middle frame mounting position 111 at the top of the frame 11, and is seamlessly fastened to the frame 11. A groove 120 is provided in the middle of the middle frame 12, a cover plate 13 is provided on the top of the middle frame 12, a workbench mounting groove 130 is provided in the middle of the cover plate 13, and a replaceable workbench plate 14 is provided in the workbench mounting groove 130 in the middle of the cover plate 13.

[0036] Preferably, a plurality of sensor mounting holes 140 are provided on the workbench 14 , and a plurality of positioning grooves 141 are provided on both sides of the sensor mounting holes 140 .

[0037] Preferably, the top front side of the cover plate 13 is provided with a plurality of switch holes 131, the switch 6 is embedded in the switch hole 131 on the top front side of the cover plate 13, and the switch 6 is electrically connected to the operation panel component 2, the driving component 3, and the positioning and clamping clamp component 4 through wires.

[0038] Preferably, the driving component 3 includes a linear cylinder 31, a connecting rod 32, a fixed block 33, and a positioning block 34. The linear cylinder 31 is installed on the top of the left and right sides of the cover plate 13, one end of the connecting rod 32 is connected to the linear cylinder 31, and the other end of the connecting rod 32 is connected to the fixed block 33. A positioning block 34 is provided on the fixed block 33, and the positioning block 34 abuts against the positioning and clamping clamp component 4 to prevent the X-axis or Y-axis deviation of the clamping clamp 45 on the positioning and clamping clamp component 4.

[0039] Preferably, the positioning and clamping fixture component 4 includes a clamping base 41, a clamping connecting rod 42, a clamping connecting arm 43, a clamping plate 44, a clamping fixture 45, a clamping positioning column 46, and a displacement sensor 47. The clamping base 41 is installed on the top of the rear side of the cover plate 13, one end of the clamping connecting rod 42 is connected to the clamping base 41, the other end of the clamping connecting rod 42 is connected to one end of the clamping connecting arm 43, and the other end of the clamping connecting arm 43 is connected to the clamping plate 44. A clamping fixture 45 is provided under the clamping plate 44, and the clamping fixture 45 is placed on the upper right side of the workbench 14. One end of the clamping positioning column 46 is inserted into the cavity 110 inside the frame 11. The other end of the clamping positioning column 46 passes through the positioning groove 141 on the workbench 14, and positions the clamping clamp 45 on the cover plate 13. One end of the displacement sensor 47 is inserted into the cavity 110 inside the frame 11, and the other end of the displacement sensor 47 passes through the sensor mounting hole 140 on the workbench 14, and is close to the clamping clamp 45. The clamping clamp 45 is provided with an IGBT module to be tested. Pressing the clamping plate 44 exerts downward pressure on the IGBT module, so that the bottom plate of the IGBT module approaches the displacement sensor 47. The displacement sensor 47 detects the curvature of the bottom plate of the IGBT module and feeds back to the operation panel display screen 22 on the operation panel component 2 for display.

[0040] Preferably, the operation panel component 2 includes an operation panel frame 21, an operation panel display screen 22, an operation panel start button 23, and an operation panel indicator light 24. The operation panel frame 21 is installed on the frame 11. A cavity 210 is provided in the middle of the operation panel frame 21. The operation panel display screen 22 is embedded in the cavity 210 in the middle of the operation panel frame 21. A button hole 211 is provided on the right side of the operation panel frame 21. An indicator light hole 212 is provided above the button hole 211. The operation panel start button 23 is embedded in the button hole 211 on the right side of the operation panel frame 21 and is electrically connected to the operation panel display screen 22 through a wire. The operation panel indicator light 24 is embedded in the indicator light hole 212 on the right side of the operation panel frame 21 and is electrically connected to the operation panel display screen 22 through a wire.

[0041] Preferably, a heat dissipation hole 112 is provided at the rear of the frame 11 .

[0042] Preferably, the pressing plate 44 is triangular in shape.

[0043] Preferably, the displacement sensor 47 is a pneumatic displacement sensor.

[0044] In summary, the test instrument for synchronously measuring the curvature of the IGBT module base plate of the double-station adopts an air-push displacement sensor to collect data from multiple positions of the IGBT module base plate, amplifies the collected data and converts it into communication data for the host computer to read, uses the host computer to read, calculate and compare the data, and then outputs and displays it on the operation panel display screen. Before the IGBT module is installed, the curvature of the base plate is detected to ensure the qualified rate of the IGBT module, so that the IGBT module can be correctly installed later, avoiding the failure of the IGBT module and reducing the production and use costs. The replaceable positioning and clamping fixture component is arranged in the frame assembly to ensure the accurate positioning of the IGBT module base plate and facilitate the placement of the IGBT module base plate. The positioning and clamping fixture component can automatically position and clamp the IGBT module base plate under test, can measure two IGBT module base plates at the same time, and can replace the two IGBT module base plates separately at any time. The two IGBT module base plates can be of the same type or the two IGBT module base plates can be of different types.

[0045] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also make appropriate changes and modifications to the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A dual-station test instrument for synchronously measuring the curvature of the bottom plate of an IGBT module, characterized in that: The invention comprises a frame assembly, an operation panel assembly, a driving assembly, a positioning and pressing fixture assembly, a baffle, and a switch. An operation panel assembly is provided on one side of the frame assembly. Driving assembly are respectively provided on the left and right sides or the rear side of the top of the frame assembly. A positioning and pressing fixture assembly is provided on one side of the driving assembly. The baffle seamlessly buckles the driving assembly and the positioning and pressing fixture assembly on the top of the frame assembly. A plurality of switches are provided on the front side of the top of the frame assembly. The switches are electrically connected to the driving assembly and the positioning and pressing fixture assembly. The frame assembly comprises a frame, a middle frame, a cover plate, and a workbench plate. A cavity is provided inside the frame. A middle frame mounting position is provided on the top of the frame. The middle frame is embedded in the middle frame mounting position on the top of the frame and is seamlessly docked and buckled on the frame. A groove is provided in the middle of the middle frame. A cover plate is provided on the top of the middle frame. A workbench mounting groove is provided in the middle of the cover plate. A replaceable workbench plate is provided in the workbench mounting groove in the middle of the cover plate. The positioning and pressing fixture assembly comprises a clamping base, a clamping connecting rod, a clamping connecting arm, a clamping plate, a clamping A clamp, a clamping positioning column, and a displacement sensor, wherein the clamping base is installed on the top of the rear side of the cover plate, one end of the clamping connecting rod is connected to the clamping base, the other end of the clamping connecting rod is connected to one end of the clamping connecting arm, and the other end of the clamping connecting arm is connected to the clamping plate; a clamping clamp is provided below the clamping plate, and the clamping clamp is placed above the right side of the workbench; one end of the clamping positioning column is inserted into the cavity inside the frame, and the other end of the clamping positioning column passes through the positioning groove on the workbench, and the clamping clamp is positioned on the cover plate; one end of the displacement sensor is inserted into the cavity inside the frame, and the other end of the displacement sensor passes through the sensor mounting hole on the workbench, and is close to the clamping clamp; an IGBT module to be tested is provided on the clamping clamp, and the clamping plate is pressed down to exert downward pressure on the IGBT module, so that the bottom plate of the IGBT module approaches the displacement sensor, and the displacement sensor detects the curvature of the bottom plate of the IGBT module and feeds back to the operation panel display screen on the operation panel component for display.

2. The test instrument for synchronously measuring the curvature of the IGBT module bottom plate according to claim 1 is characterized in that: The workbench plate is provided with a plurality of sensor mounting holes, and both sides of the sensor mounting holes are provided with a plurality of positioning grooves.

3. The test instrument for synchronously measuring the curvature of the bottom plate of the IGBT module with dual working positions according to claim 1 is characterized in that: The front top of the cover plate is provided with a plurality of switch holes, the switches are embedded in the switch holes on the front top of the cover plate, and the switches are electrically connected to the operation panel component, the driving component, and the positioning and pressing fixture component through wires.

4. The test instrument for synchronously measuring the curvature of the bottom plate of the IGBT module with two working positions according to claim 1 is characterized in that: The driving component includes a linear cylinder, a connecting rod, a fixed block, and a positioning block. The linear cylinder is installed on the top of the left and right sides of the cover plate. One end of the connecting rod is connected to the linear cylinder, and the other end of the connecting rod is connected to the fixed block. A positioning block is provided on the fixed block, and the positioning block is against the positioning and clamping clamp component to prevent the X-axis or Y-axis deviation of the clamping clamp on the positioning and clamping clamp component.

5. The test instrument for synchronously measuring the curvature of the IGBT module bottom plate of the double-station according to claim 1 is characterized in that: The operation panel component includes an operation panel frame, an operation panel display screen, an operation panel start button, and an operation panel indicator light. The operation panel frame is installed on the frame. A cavity is provided in the middle of the operation panel frame. The operation panel display screen is embedded in the cavity in the middle of the operation panel frame. A button hole is provided on the right side of the operation panel frame. An indicator light hole is provided above the button hole. The operation panel start button is embedded in the button hole on the right side of the operation panel frame and is electrically connected to the operation panel display screen through a wire. The operation panel indicator light is embedded in the indicator light hole on the right side of the operation panel frame and is electrically connected to the operation panel display screen through a wire.

6. The test instrument for synchronously measuring the curvature of the IGBT module bottom plate of the double-station according to claim 1 is characterized in that: The rear part of the frame is provided with heat dissipation holes.

7. The test instrument for synchronously measuring the curvature of the bottom plate of the IGBT module with two working positions according to claim 1 is characterized in that: The pressing plate is in a triangular shape.

8. The test instrument for synchronously measuring the curvature of the bottom plate of the IGBT module with two working positions according to claim 1 is characterized in that: The displacement sensor is a pneumatic displacement sensor.

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