A heating device for aging test of press-fit IGBT devices

Abstract

The present invention is applicable to the field of aging tests of IGBT devices, and provides a heating device for aging tests of press-fit IGBT devices, including a housing, and further including: a heating assembly disposed in the housing, a placement table is disposed on one side of the heating assembly, and an electric telescopic member is disposed between the placement table and the inner end face of the housing; a clamping mechanism is disposed on one side of the placement table, the clamping mechanism can clamp and fix the IGBT device, and the clamping mechanism is connected with a rotating mechanism, and the rotating mechanism can drive the IGBT device to continuously rotate. By starting the heating assembly, the heater heats the IGBT device through the heating coil, and at the same time, the rotating mechanism is started. In the rotating mechanism, the second motor is started, the second motor drives the driving wheel to rotate, the driving wheel drives the connecting rod to rotate through the engagement with the driven wheel, and the connecting rod drives the IGBT device to continuously rotate through the arc-shaped clamp, so that the IGBT device is uniformly heated.

Description

Technical Field

[0001] The present invention belongs to the field of IGBT device aging testing, and particularly relates to a heating device for press-fit IGBT device aging testing. Background Art

[0002] IGBT, an insulated gate bipolar transistor, is a composite fully controlled voltage-driven power semiconductor device composed of a bipolar transistor and an insulated gate field-effect transistor, combining the advantages of both a MOSFET's high input impedance and a power transistor's low conduction voltage drop. The GTR has a low saturation voltage drop and a large current density, but requires a large drive current; the MOSFET has a very small drive power and a fast switching speed, but a large conduction voltage drop and a small current density. The IGBT combines the advantages of the above two devices, with a small drive power and a low saturation voltage drop. It is very suitable for application in variable current systems with a DC voltage of 600V or above, such as AC motors, frequency converters, switching power supplies, lighting circuits, traction drives, and other fields.

[0003] During the aging test of press-fit IGBT devices, heating tests are required. However, since the IGBT devices are prone to uneven heating during the test, the test results are not accurate enough, resulting in large experimental errors.

[0004] To avoid the above technical problems, it is necessary to provide a heating device for press-fit IGBT device aging testing to overcome the defects in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a heating device for press-fit IGBT device aging testing, aiming to solve the problem that during the aging test of press-fit IGBT devices, heating tests are required, but since the IGBT devices are prone to uneven heating during the test, the test results are not accurate enough, resulting in large experimental errors.

[0006] The present invention is implemented as follows. A heating device for press-fit IGBT device aging testing includes a housing, and further includes:

[0007] A heating assembly is disposed in the housing. A placement table is provided on one side of the heating assembly, and an electric telescopic member is provided between the placement table and the inner end face of the housing.

[0008] A clamping mechanism is provided on one side of the placement table. The clamping mechanism can clamp and fix the IGBT device, and the clamping mechanism is connected to a rotating mechanism, which can drive the IGBT device to rotate continuously.

[0009] In a further technical solution, the clamping mechanism includes a left sliding frame, a right sliding frame, a driving assembly, and a fixture assembly;

[0010] A mechanism cavity is provided in the shell, and the left sliding frame and the right sliding frame are both slidably connected to the side walls of the mechanism cavity. The driving assembly can drive the left sliding frame and the right sliding frame to move relative to or towards each other. The left sliding frame and the right sliding frame are both connected to a clamp assembly, and the clamp assembly is used to clamp and limit the IGBT device.

[0011] A further technical solution is that the driving assembly includes a No. 1 motor, a rack and a gear, the left sliding frame and the right sliding frame are both fixedly provided with a rack, the No. 1 motor is fixedly connected to the inner wall of the mechanism cavity, the gear is fixedly connected to the output shaft of the No. 1 motor, and the gear is meshed with both sections of the rack.

[0012] According to a further technical solution, the clamp assembly includes a limit clamp, a guide rod, a threaded sleeve, a spring and an arc clamp;

[0013] One end of the left sliding frame is rotatably connected to a connecting rod, one end of the connecting rod is fixedly connected to a limit clamp, one end of the right sliding frame is rotatably connected to a limit clamp, the limit clamp is slidably connected to a guide rod, one end of the guide rod is threadedly connected to a threaded sleeve, the other end of the guide rod is fixedly connected to an arc clamp, and the outer side of the guide rod is sleeved with a spring.

[0014] According to a further technical solution, the rotating mechanism includes a second motor, a driving wheel and a driven wheel;

[0015] The No. 2 motor is fixedly connected to the left sliding frame, the driving wheel is fixedly connected to the output shaft of the No. 2 motor, the driven wheel is fixedly connected to the connecting rod, and the driving wheel and the driven wheel are meshed.

[0016] According to a further technical solution, the heating assembly includes a heater and a heating coil, the heater and the heating coil are both fixedly connected to the inner end surface of the shell, and the heating coil is connected to the heater.

[0017] According to a further technical solution, an arc-shaped heat conducting plate is fixedly provided on the inner wall of the shell.

[0018] According to a further technical solution, the limit clamp is arc-shaped, and both ends of the limit clamp are fixedly connected with rubber heads.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] A heating device for aging test of a press-fit IGBT device provided by the present invention starts the heating component. The heater heats the IGBT device through the heating coil. At the same time, the rotation mechanism is started. In the rotation mechanism, the second motor is started, and the second motor drives the driving wheel to rotate. The driving wheel drives the connecting rod to rotate through the engagement with the driven wheel. The connecting rod drives the IGBT device to continuously rotate through the arc-shaped clamp, so that the IGBT device is uniformly heated.

[0021] In a heating device for aging test of a press-fit IGBT device provided by the present invention, arc-shaped heat conducting plates are fixedly arranged on the inner walls of the outer shell, and the heat is concentrated at the IGBT device through the arc-shaped heat conducting plates, increasing the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is Figure 1 an enlarged structural diagram of area A in

[0024] Figure 3 is Figure 1 an enlarged structural diagram of area B in

[0025] Figure 4 is a schematic structural diagram of the fixture assembly;

[0026] Figure 5 is a schematic structural diagram of the arc-shaped heat conducting plate.

[0027] In the drawings: 1. Outer shell; 2. Heating component; 21. Heater; 22. Heating coil; 3. Placing table; 4. Electric telescopic part; 5. Clamping mechanism; 51. Left sliding frame; 52. Right sliding frame; 53. Driving component; 531. First motor; 532. Rack; 533. Gear; 54. Fixture assembly; 541. Limit clamp; 542. Guide rod; 543. Threaded sleeve; 544. Spring; 545. Arc-shaped clamp; 55. Connecting rod; 6. Rotation mechanism; 61. Second motor; 62. Driving wheel; 63. Driven wheel; 6. Rotation mechanism; 61. Second motor; 62. Driving wheel; 63. Driven wheel; 7. Mechanism cavity; 8. Arc-shaped heat conducting plate; 9. Rubber head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0030] As shown Figures 1 - 5 in the figure, a heating device for aging test of a press - fit IGBT device provided by the present invention includes a housing 1, and further includes:

[0031] A heating component 2 is arranged in the housing 1. A placement table 3 is arranged on one side of the heating component 2. An electric telescopic member 4 is arranged between the placement table 3 and the inner end face of the housing 1;

[0032] A clamping mechanism 5 is arranged on one side of the placement table 3. The clamping mechanism 5 can clamp and fix the IGBT device. The clamping mechanism 5 is connected to a rotating mechanism 6, and the rotating mechanism 6 can drive the IGBT device to continuously rotate.

[0033] During use, place the IGBT device on the placement table 3, start the clamping mechanism 5, and the clamping mechanism 5 clamps and fixes the IGBT device. Then control the electric telescopic member 4 to lower the height;

[0034] Start the heating component 2. The heating component 2 heats the IGBT device. At the same time, start the rotating mechanism 6, and the rotating mechanism 6 can drive the IGBT device to continuously rotate, so that the IGBT device is heated evenly.

[0035] In an embodiment of the present invention, as a preferred embodiment of the present invention, the clamping mechanism 5 includes a left sliding frame 51, a right sliding frame 52, a driving component 53 and a fixture component 54;

[0036] A mechanism cavity 7 is arranged in the housing 1. Both the left sliding frame 51 and the right sliding frame 52 are slidably connected to the side wall of the mechanism cavity 7. The driving component 53 can drive the left sliding frame 51 and the right sliding frame 52 to move relative to or towards each other. Both the left sliding frame 51 and the right sliding frame 52 are connected to a fixture component 54, and the fixture component 54 is used for clamping and limiting the IGBT device.

[0037] In the clamping mechanism 5, the driving component 53 drives the left sliding frame 51 and the right sliding frame 52 to move relative to each other, and the left sliding frame 51 and the right sliding frame 52 clamp and limit the IGBT device through the fixture component 54.

[0038] In an embodiment of the present invention, as a preferred embodiment of the present invention, the driving component 53 includes a first motor 531, a rack 532 and a gear 533. Both the left sliding frame 51 and the right sliding frame 52 are fixedly provided with a rack 532. The first motor 531 is fixedly connected to the inner wall of the mechanism cavity 7. The gear 533 is fixedly connected to the output shaft of the first motor 531, and the gear 533 meshes with both sections of the rack 532.

[0039] In the driving component 53, start the first motor 531. The first motor 531 drives the gear 533 to rotate. The gear 533 meshes with the rack 532, thereby driving the left sliding frame 51 and the right sliding frame 52 to move relative to each other.

[0040] In an embodiment of the present invention, as a preferred embodiment of the present invention, the fixture assembly 54 includes a limit clamp 541, a guide rod 542, a threaded sleeve 543, a spring 544, and an arc clamp 545;

[0041] One end of the left sliding frame 51 is rotatably connected to a connecting rod 55. One end of the connecting rod 55 is fixedly connected to a limit clamp 541. One end of the right sliding frame 52 is rotatably connected to a limit clamp 541. The limit clamp 541 is slidably connected to the guide rod 542. One end of the guide rod 542 is threadedly connected to the threaded sleeve 543. The other end of the guide rod 542 is fixedly connected to the arc clamp 545. The spring 544 is sleeved on the outer side of the guide rod 542.

[0042] In the fixture assembly 54, the limit clamp 541 drives the arc clamp 545 to clamp and fix the IGBT device. Under the action of the spring 544, the arc clamp 545 elastically clamps the IGBT device; rotate the threaded sleeve 543, and the threaded sleeve 543 moves along the guide rod 542, thereby adjusting the pre-tightening force of the spring 544.

[0043] In an embodiment of the present invention, as a preferred embodiment of the present invention, the rotating mechanism 6 includes a second motor 61, a driving wheel 62, and a driven wheel 63;

[0044] The second motor 61 is fixedly connected to the left sliding frame 51. The driving wheel 62 is fixedly connected to the output shaft of the second motor 61. The driven wheel 63 is fixedly connected to the connecting rod 55. The driving wheel 62 and the driven wheel 63 are meshed with each other.

[0045] In the rotating mechanism 6, start the second motor 61. The second motor 61 drives the driving wheel 62 to rotate. The driving wheel 62 drives the connecting rod 55 to rotate through meshing with the driven wheel 63. The connecting rod 55 drives the IGBT device to continuously rotate through the arc clamp 545.

[0046] In an embodiment of the present invention, as a preferred embodiment of the present invention, the heating component 2 includes a heater 21 and a heating coil 22. The heater 21 and the heating coil 22 are both fixedly connected to the inner end face of the housing 1. The heating coil 22 is connected to the heater 21.

[0047] In the heating component 2, the heater 21 heats the IGBT device through the heating coil 22.

[0048] In an embodiment of the present invention, as a preferred embodiment of the present invention, arc-shaped heat conducting plates 8 are fixedly arranged on the inner walls of the outer shell 1, and the heat is concentrated at the IGBT device through the arc-shaped heat conducting plates 8.

[0049] In an embodiment of the present invention, as a preferred embodiment of the present invention, the limiting clip 541 is arc-shaped, and rubber heads 9 are fixedly connected to both ends of the limiting clip 541, and the fitting degree during the connection of the arc-shaped clip 545 is increased through the rubber heads 9.

[0050] Working principle:

[0051] During use, place the IGBT device on the placing table 3, start the first motor 531, the first motor 531 drives the gear 533 to rotate, the gear 533 drives the left sliding frame 51 and the right sliding frame 52 to move relative to each other through meshing with the rack 532, the left sliding frame 51 and the right sliding frame 52 clamp and limit the IGBT device through the arc-shaped clip 545, the limiting clip 541 drives the arc-shaped clip 545 to clamp and fix the IGBT device, and under the action of the spring 544, the arc-shaped clip 545 elastically clamps the IGBT device; rotate the threaded sleeve 543, and the threaded sleeve 543 moves along the guide rod 542, so as to adjust the pre-tightening force of the spring 544, and then control the electric telescopic member 4 to lower the height;

[0052] Start the heating component 2, the heater 21 heats the IGBT device through the heating coil 22, and at the same time start the rotating mechanism 6. In the rotating mechanism 6, start the second motor 61, the second motor 61 drives the driving wheel 62 to rotate, the driving wheel 62 drives the connecting rod 55 to rotate through meshing with the driven wheel 63, and the connecting rod 55 drives the IGBT device to continuously rotate through the arc-shaped clip 545, so that the IGBT device is uniformly heated;

[0053] Arc-shaped heat conducting plates 8 are fixedly arranged on the inner walls of the outer shell 1, and the heat is concentrated at the IGBT device through the arc-shaped heat conducting plates 8.

[0054] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

[0055] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. The narrative manner of this specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heating device for aging test of a crimped IGBT device, comprising a housing (1), characterized in that: Also includes: A heating component (2) is arranged in the outer shell (1); a placement table (3) is arranged on one side of the heating component (2); and an electric telescopic member (4) is arranged between the placement table (3) and the inner end surface of the outer shell (1); A clamping mechanism (5) is provided on one side of the placement platform (3), and the clamping mechanism (5) is capable of clamping and fixing the IGBT device; the clamping mechanism (5) is connected to a rotating mechanism (6), and the rotating mechanism (6) is capable of driving the IGBT device to rotate continuously; The clamping mechanism (5) comprises a left sliding frame (51), a right sliding frame (52), a driving assembly (53) and a clamp assembly (54); A mechanism cavity (7) is provided in the housing (1); the left sliding frame (51) and the right sliding frame (52) are both slidably connected to the side wall of the mechanism cavity (7); the driving assembly (53) is capable of driving the left sliding frame (51) and the right sliding frame (52) to move relative to or towards each other; the left sliding frame (51) and the right sliding frame (52) are both connected to a clamp assembly (54); the clamp assembly (54) is used to clamp and limit the IGBT device; The clamp assembly (54) comprises a limit clamp (541), a guide rod (542), a threaded sleeve (543), a spring (544), and an arc clamp (545); One end of the left sliding frame (51) is rotatably connected to a connecting rod (55), one end of the connecting rod (55) is fixedly connected to a limiting clamp (541), one end of the right sliding frame (52) is rotatably connected to a limiting clamp (541), the limiting clamp (541) is slidably connected to a guide rod (542), one end of the guide rod (542) is threadedly connected to a threaded sleeve (543), the other end of the guide rod (542) is fixedly connected to an arc-shaped clamp (545), and the outer side of the guide rod (542) is provided with a spring (544); The rotating mechanism (6) comprises a second motor (61), a driving wheel (62) and a driven wheel (63); The second motor (61) is fixedly connected to the left sliding frame (51), the driving wheel (62) is fixedly connected to the output shaft of the second motor (61), the driven wheel (63) is fixedly connected to the connecting rod (55), and the driving wheel (62) and the driven wheel (63) are meshed.

2. The heating device for aging test of a press-fit IGBT device according to claim 1, characterized in that: The driving assembly (53) comprises a No. 1 motor (531), a rack (532) and a gear (533); the left sliding frame (51) and the right sliding frame (52) are both fixedly provided with a rack (532); the No. 1 motor (531) is fixedly connected to the inner wall of the mechanism cavity (7); the gear (533) is fixedly connected to the output shaft of the No. 1 motor (531); and the gear (533) is meshed with the two sections of the rack (532).

3. The heating device for aging test of a press-fit IGBT device according to claim 1, characterized in that: The heating component (2) comprises a heater (21) and a heating coil (22); the heater (21) and the heating coil (22) are both fixedly connected to the inner end surface of the housing (1); and the heating coil (22) is connected to the heater (21).

4. The heating device for aging test of a press-fit IGBT device according to claim 1, characterized in that: The inner wall of the outer shell (1) is fixedly provided with an arc-shaped heat conducting plate (8).

5. The heating device for aging test of press-fit IGBT device according to claim 1, characterized in that: The limiting clamp (541) is arc-shaped, and both ends of the limiting clamp (541) are fixedly connected to rubber heads (9).

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