Insulated gate bipolar transistor (IGBT) heat dissipation performance test tool

Abstract

The utility model relates to the technical field of IGBT testing, in particular to an IGBT heat dissipation performance testing tool. The IGBT heat dissipation performance test tool comprises a workbench, a support, a support arm and a pressing piece, a test area for placing a device is formed on the surface of one side of the workbench in the first direction, the support is fixed on the workbench, and the pressing piece is installed on the support through the support arm and is suspended above the device in the test area; the pressing piece can be adjusted in a lifting mode on the supporting arm in the first direction, so that the pressing piece can press and fix the device on the workbench, the supporting arm and the support are connected in a rotating mode, the pressing piece can adjust the angle position, the position of the pressing piece acting on the device is changed, and therefore the device can be fixed. Therefore, the testing tool can be compatible with clamping and fixing of devices of different specifications, and the acting position of the pressing piece can be adjusted according to different pressed positions, capable of being stably clamped, of the devices of different specifications.

Description

Technical Field

[0001] This application relates to the field of IGBT testing technology, and in particular to an IGBT heat dissipation performance testing fixture. Background Technology

[0002] IGBTs (Insulated Gate Bipolar Transistors) are core devices in the field of power electronics, widely used in industrial control, new energy power generation, rail transportation, and home appliances. Because IGBTs generate a significant amount of heat during operation, their heat dissipation performance is a key factor affecting equipment reliability and lifespan. Therefore, in the research, development, production, and quality inspection of IGBTs, it is typically necessary to use testing fixtures and methods such as thermoelectric coupling detection to test parameters such as thermal resistance and junction temperature.

[0003] Existing test fixtures typically include clamping components to secure IGBT devices and ensure the accuracy of test data. However, different IGBT specifications have varying pin orientations and heat dissipation surface angles, resulting in different pressure points for stable clamping. The existing clamping components have fixed positions, limiting their application to different IGBT specifications and preventing adaptive adjustments. This limitation necessitates frequent clamping component changes during testing of multiple IGBT models, significantly impacting testing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an IGBT heat dissipation performance testing fixture that can be adapted to the testing of devices of different specifications.

[0005] This utility model provides a testing fixture for IGBT heat dissipation performance, including a worktable, a support, a support arm, and a clamping component;

[0006] The workbench forms a test area for placing the device under test. The support is mounted on the workbench, and the clamping member is mounted on the workbench via the support arm, so that the clamping member is suspended on one side of the test area in a first direction.

[0007] The clamping member is adjustable up and down along the first direction on the support arm, and the support arm and the support are rotatably connected, so that the support arm and the clamping member can rotate in a plane perpendicular to the first direction.

[0008] Furthermore, the support includes a support column, a limiting cover, and a rotating shaft;

[0009] One end of the support column is mounted on the workbench, and the other end of the support column is detachably connected to the limiting cover. The support column is placed between the limiting covers to form an accommodating space. The rotating shaft is arranged along the first direction and adapted to be limited and installed in the accommodating space, so that the rotating shaft can rotate around its own axis.

[0010] The limiting cover has a through hole coaxial with the rotating shaft, and one end of the support arm has a connecting part that can movably pass through the through hole and be coaxially connected to the rotating shaft.

[0011] Furthermore, the limiting cover can be sleeved on the support column, and the inner wall of the limiting cover is provided with a first internal thread connection part, and the outer wall of the support column is provided with a first external thread connection part that is adapted to be screwed into the first internal thread connection part.

[0012] Furthermore, a first screw hole is provided at one end of the rotating shaft facing the limiting cover. The first screw hole is coaxially arranged with the rotating shaft. A second external threaded connection part is provided on the outer wall of the connecting part, so that the connecting part can be adapted to be screwed into the first screw hole.

[0013] Furthermore, the limiting cover is provided with a locking element, and the support arm is provided with a locking engagement element that is compatible with the locking element, so as to lock the support arm.

[0014] Furthermore, the locking member is an annular member coaxially mounted on the limiting cover, and the inner diameter of the locking member is not less than the outer diameter of the connecting part;

[0015] The locking member has a locking groove on the side surface opposite to the limiting cover. The locking groove extends radially along the locking member and penetrates both the inner and outer sides of the locking member. There are multiple locking grooves, which are distributed at intervals along the circumference of the locking member.

[0016] The locking component is a T-shaped rod, including a first rod portion and a second rod portion that are vertically connected. The first rod portion is arranged along the radial direction of the locking component and pivotally connected to the connecting portion, so that the second rod portion can be flipped to be confined within or lifted away from the opposite locking groove.

[0017] Furthermore, the support includes a base plate, and the support column is connected to the workbench via the base plate;

[0018] The base plate is provided with a plurality of first connection holes spaced apart side by side;

[0019] The workbench is provided with a plurality of second connecting holes, which are arranged in a multi-row, multi-column array. The plurality of first connecting holes can be arranged one-to-one with the plurality of second connecting holes located in the same column to be used for fasteners to be inserted so that the base plate is securely installed on the workbench.

[0020] Furthermore, the support arm is provided with a second screw hole, the axis of which extends along the first direction;

[0021] The outer wall of the clamping member is provided with a third external threaded connection part that is adapted to the second screw hole, so that the clamping member can be screwed onto the support arm.

[0022] Furthermore, the clamping member has a pressure head at one end facing the worktable, and the surface of the pressure head facing the worktable has anti-slip texture.

[0023] Furthermore, the end of the clamping member away from the worktable is provided with a handle.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This utility model provides an IGBT heat dissipation performance testing fixture, including a worktable, a support, a support arm, and a clamping component. One side surface of the worktable in a first direction forms a test area for placing the device under test, i.e., the IGBT. In actual use, the worktable can be placed horizontally, with the first direction being vertical. The upper surface of the worktable forms the test area for placing the device. The support is located on one side of the test area in the horizontal direction and fixed to the worktable. The clamping component is mounted on the support via the support arm, suspending the clamping component above the device in the test area. The clamping component is adjustable up and down along the first direction on the support arm, allowing it to move towards the device and press it firmly against the worktable. This ensures the device is securely clamped during testing, specifically during temperature measurement using a thermoelectric detection device, guaranteeing stable contact between the device and the sensor of the thermoelectric detection device, thus ensuring the accuracy of the test results.

[0026] Meanwhile, the connection between the support arm and the support is a rotatable connection, allowing the support arm and the clamping member mounted on the support arm to rotate in a plane perpendicular to the first direction. This allows adjustment of the angle position of the clamping member, changing the relative position between the device and the clamping member. Therefore, the IGBT heat dissipation performance testing fixture of this application can be compatible with clamping and fixing devices of different specifications. In actual operation, depending on the different pressure positions where different specifications of devices can be stably clamped, the angle position of the clamping member can be adjusted first to align the clamping member with the pressure position where the device can be stably clamped. Then, the clamping member can be raised and lowered to use the clamping member to press and fix the device on the worktable. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A partially enlarged schematic diagram of the IGBT heat dissipation performance testing fixture provided in this embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the structure of the support provided in an embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the support arm with a clamping element installed, provided for an embodiment of the present utility model.

[0031] Figure label:

[0032] 1-Workbench, 11-Second connecting hole, 2-Support, 21-Seat plate, 22-Column, 23-Accommodation space, 24-Rotating shaft, 25-First screw hole, 26-Limit cover, 27-Locking component, 28-Locking groove, 3-Support arm, 31-Connecting part, 32-Locking mating component, 33-Groove, 4-Clamping component, 41-Pressing head. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0034] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0035] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The following reference Figures 1 to 3 This application describes a test fixture for testing the thermal performance of IGBTs according to some embodiments.

[0039] This application provides a testing fixture for IGBT heat dissipation performance, such as... Figure 1 As shown, the IGBT heat dissipation performance testing fixture includes a worktable 1, a support 2, a support arm 3, and a clamping component 4. One side surface of the worktable 1 in the first direction forms a test area for placing the device under test (not shown in the figure), i.e., the IGBT. In actual use, the worktable 1 can be placed horizontally with the first direction being vertical, and the upper surface of the worktable 1 forms a test area for placing the device.

[0040] The support 2 is located on one side of the test area in the horizontal direction and fixed on the workbench 1. The clamping member 4 is installed on the support 2 through the support arm 3, so that the clamping member 4 is suspended above the device in the test area. The clamping member 4 can be raised and lowered along the first direction on the support arm 3, so that the clamping member 4 can move toward the device to press the device tightly on the workbench 1. Thus, during the test, specifically when the thermoelectric detection equipment is used to measure the temperature of the device, the device is fixed and clamped, ensuring stable contact between the device and the sensor of the thermoelectric detection equipment, so as to ensure the accuracy of the test results.

[0041] Meanwhile, the connection between the support arm 3 and the support 2 is a rotatable connection, allowing the support arm 3 and the clamping member 4 mounted on the support arm 3 to rotate in a plane perpendicular to the first direction. This allows adjustment of the angle position of the clamping member 4, changing the relative position between the device and the clamping member 4. This enables the IGBT heat dissipation performance testing fixture of this application to be compatible with clamping and fixing devices of different specifications. In actual operation, depending on the different pressure positions where different specifications of devices can be stably clamped, the angle position of the clamping member 4 can be adjusted first to align the clamping member 4 with the pressure position where the device can be stably clamped. Then, the clamping member 4 can be raised and lowered to use the clamping member 4 to press and fix the device onto the worktable 1.

[0042] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the support 2 includes a support column 22, a limiting cover 26, and a rotating shaft 24. One end of the support column 22 is mounted on the worktable 1, specifically via a base plate 21 (described below). The other end of the support column 22 is detachably connected to the limiting cover 26, and a receiving space 23 is defined between the support column 22 and the limiting cover 26. The axis of the rotating shaft 24 is arranged along a first direction, and the rotating shaft 24 is fitted and limited within the receiving space 23, allowing the rotating shaft 24 to rotate only around its own axis within the receiving space 23. The limiting cover 26 has a through hole, which is coaxial with the rotating shaft 24; as shown... Figure 3 As shown, the support arm 3 has a connecting part 31 formed at one end for connecting to the support column 22. The connecting part 31 can movably pass through the through hole and be coaxially connected to the rotating shaft 24. Thus, when the support arm 3 is subjected to external force, it can rotate around the axis of the rotating shaft 24 to drive the clamping member 4 to rotate and adjust the angle position of the clamping member 4.

[0043] In this embodiment, preferably, as follows: Figure 2 As shown, the limiting cover 26 is sleeved on the upper end of the support column 22. The inner side wall of the limiting cover 26 is provided with a first internal thread connection part, and the outer side wall of the upper end of the support column 22 is provided with a first external thread connection part. The first external thread connection is adapted to the first internal thread connection part, so that the limiting cover 26 can be detachably installed on the support column 22 by screwing, thereby facilitating the opening of the accommodating space 23 to disassemble and install the rotating shaft 24.

[0044] In this embodiment, preferably, as follows: Figure 2 As shown, the upper end of the rotating shaft 24 is provided with a first screw hole 25, the axis of the first screw hole 25 is collinear with the axis of the rotating shaft 24, and the outer side wall of the connecting part 31 is provided with a second external thread connecting part, so that the connecting part 31 can be screwed into the first screw hole 25, thereby realizing the detachable connection between the rotating shaft 24 and the connecting part 31.

[0045] In this embodiment, preferably, the limiting cover 26 is provided with a locking member 27, and the support arm 3 is provided with a locking engagement member 32 that is adapted to the locking member 27, so that the support arm 3 can be locked after rotating a predetermined angle, so as to lock the angle position of the pressing member 4 on the support arm 3 and prevent the pressing member 4 from shifting in subsequent operations.

[0046] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the locking element 27 is annular and coaxially mounted on the limiting cover 26. The connecting part 31 on the support arm 3 can pass through the locking element 27 to connect with the rotating shaft 24. The upper surface of the locking element 27 is provided with a locking groove 28, which extends along the radial direction of the locking element 27, and both ends of the locking groove 28 penetrate through the inner and outer sides of the locking element 27 in the radial direction.

[0047] The locking component 32 is a T-shaped rod, comprising a first rod portion and a second rod portion vertically connected. The first rod portion is arranged radially along the locking component 27 and pivotally connected to the support arm 3, allowing the first rod portion to rotate around its own axis, thereby causing the second rod portion to flip up and down. Specifically, the support arm 3 is provided with a groove 33, and the second rod portion extends into the groove 33 and is rotatably connected to the two side walls opposite to the groove 33. In actual operation, rotating the support arm 3 allows the second rod portion to align with a locking groove 28 on the locking component 27, and flipping the second rod portion downwards allows it to be confined within the opposing locking groove 28, thereby locking the support arm 3 and preventing it from rotating further. When it is necessary to rotate the support arm 3 again to adjust the angle position of the clamping component 4, simply lift the second rod portion upwards to remove it from the locking groove 28.

[0048] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the lower end of the support column 22 is connected to the base plate 21, and the support column 22 is connected to the worktable 1 through the base plate 21. Specifically, the base plate 21 has a plurality of first connecting holes arranged side by side at intervals, and the worktable 1 has a plurality of second connecting holes 11 arranged in a multi-row, multi-column array. The second connecting holes 11 in the same row are spaced apart along a horizontal second direction, and the second connecting holes 11 in the same column are spaced apart along a horizontal third direction. The second direction and the third direction are perpendicular to each other. The plurality of first connecting holes on the base plate 21 can be arranged in a one-to-one correspondence with the plurality of second connecting holes 11 in any column to insert fasteners, so that the base plate 21 is securely installed on the worktable 1. The installation position of the base plate 21 on the worktable 1 is adjustable along the second direction and the third direction. Thus, in actual operation, the installation position of the base plate 21 on the worktable 1 can be adjusted according to the different sizes of the devices of different specifications, so that the base plate 21 is placed adjacent to the device, and the clamping member 4 is suspended above the device.

[0049] Regarding the lifting and lowering adjustment of the clamping member 4, in this embodiment, preferably, as follows: Figure 3 As shown, the support arm 3 has a second screw hole at one end for mounting the clamping member 4. The second screw hole passes through the support arm 3 and its axial direction extends along the first direction. The outer wall of the clamping member 4 has a third external threaded connection part that matches the second screw hole, so that the clamping member 4 is screwed onto the support arm 3. By screwing the clamping member 4, the clamping member 4 can move along the first direction to achieve the lifting and lowering adjustment of the clamping member 4.

[0050] In this embodiment, preferably, as follows: Figure 3 As shown, the lower end of the clamping member 4 is provided with a pressure head 41, and the lower surface of the pressure head 41 is provided with anti-slip texture, such as multiple anti-slip ridges or anti-slip dots on the lower surface of the pressure head 41. This ensures that the clamping member 4 can stably press against the device to achieve stable clamping and fixing of the device.

[0051] In this embodiment, preferably, as follows: Figure 3 As shown, the upper end of the clamping member 4 is provided with a handle. The clamping member 4 can be rotated by the handle to adjust the clamping member 4 in height, and can also provide force to the support arm 3 to rotate the support arm 3 to adjust the angle position of the clamping member 4.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A testing fixture for IGBT heat dissipation performance, characterized in that, Includes worktable, support, support arm, and clamping components; The workbench forms a test area for placing the device under test. The support is mounted on the workbench, and the clamping member is mounted on the workbench via the support arm, so that the clamping member is suspended on one side of the test area in a first direction. The clamping member is adjustable up and down along the first direction on the support arm, and the support arm and the support are rotatably connected, so that the support arm and the clamping member can rotate in a plane perpendicular to the first direction.

2. The IGBT heat dissipation performance testing fixture according to claim 1, characterized in that, The support includes a support column, a limiting cover, and a rotating shaft; One end of the support column is mounted on the workbench, and the other end of the support column is detachably connected to the limiting cover. The support column is placed between the limiting covers to form an accommodating space. The rotating shaft is arranged along the first direction and adapted to be limited and installed in the accommodating space, so that the rotating shaft can rotate around its own axis. The limiting cover has a through hole coaxial with the rotating shaft, and one end of the support arm has a connecting part that can movably pass through the through hole and be coaxially connected to the rotating shaft.

3. The IGBT heat dissipation performance testing fixture according to claim 2, characterized in that, The limiting cover can be sleeved on the support column, and the inner wall of the limiting cover is provided with a first internal thread connection part, and the outer wall of the support column is provided with a first external thread connection part that is adapted to be screwed into the first internal thread connection part.

4. The IGBT heat dissipation performance testing fixture according to claim 2, characterized in that, The rotating shaft has a first screw hole at one end facing the limiting cover. The first screw hole is coaxial with the rotating shaft. The outer wall of the connecting part has a second external threaded connecting part, so that the connecting part can be screwed into the first screw hole.

5. The IGBT heat dissipation performance testing fixture according to claim 2, characterized in that, The limiting cover is provided with a locking element, and the support arm is provided with a locking engagement element that is adapted to the locking element to lock the support arm.

6. The IGBT heat dissipation performance testing fixture according to claim 5, characterized in that, The locking element is a ring-shaped element coaxially mounted on the limiting cover, and the inner diameter of the locking element is not less than the outer diameter of the connecting part; The locking member has a locking groove on the side surface opposite to the limiting cover. The locking groove extends radially along the locking member and penetrates both the inner and outer sides of the locking member. There are multiple locking grooves, which are distributed at intervals along the circumference of the locking member. The locking component is a T-shaped rod, including a first rod portion and a second rod portion that are vertically connected. The first rod portion is arranged along the radial direction of the locking component and pivotally connected to the connecting portion, so that the second rod portion can be flipped to be confined within or lifted away from the opposite locking groove.

7. The IGBT heat dissipation performance testing fixture according to claim 2, characterized in that, The support includes a base plate, and the support column is connected to the workbench through the base plate; The base plate is provided with a plurality of first connection holes spaced apart side by side; The workbench is provided with a plurality of second connecting holes, which are arranged in a multi-row, multi-column array. The plurality of first connecting holes can be arranged one-to-one with the plurality of second connecting holes located in the same column to be used for fasteners to be inserted so that the base plate is securely installed on the workbench.

8. The IGBT heat dissipation performance testing fixture according to claim 1, characterized in that, The support arm is provided with a second screw hole, and the axis of the second screw hole extends along the first direction; The outer wall of the clamping member is provided with a third external threaded connection part that is adapted to the second screw hole, so that the clamping member can be screwed onto the support arm.

9. The IGBT heat dissipation performance testing fixture according to claim 8, characterized in that, The clamping member has a pressure head at one end facing the worktable, and the surface of the pressure head facing the worktable has anti-slip texture.

10. The IGBT heat dissipation performance testing fixture according to claim 8, characterized in that, The clamping member has a handle at the end away from the worktable.

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