Pressure control device for IGBT (Insulated Gate Bipolar Translator) thermal test

Abstract

The utility model discloses a pressure control device for an IGBT thermal test, which comprises a T-shaped seat, the top of the T-shaped seat is fixedly connected with a vertically arranged rotating shaft, and the top end of the rotating shaft is rotatably connected with a cross beam through a connecting piece; a screw rod and a sliding rod which are arranged in the vertical direction are installed on the upper portion of a main body of the T-shaped base, the screw rod is connected with the T-shaped base through threads, and the sliding rod is connected with the T-shaped base in a sliding mode. The bottom of the screw rod is rotationally installed in a sliding seat, a pressing rod arranged in the vertical direction is installed below the sliding seat, and a heat insulation pressing head A is installed at the bottom end of the pressing rod; the sliding rod body is sleeved with an annular weight, and a heat insulation pressing head B is installed at the bottom end of the sliding rod. The pressure control device for the IGBT thermal test provided by the utility model not only can simulate a constant-voltage pressure environment, but also can simulate a variable-voltage pressure environment, and the two pressure environments can be switched conveniently, so that the thermal test process is more convenient and efficient.

Description

Technical Field

[0001] This utility model relates to a pressure control device for IGBT thermal testing, belonging to the field of thermal testing technology. Background Technology

[0002] IGBT, or Insulated Gate Bipolar Transistor, is a composite, fully controllable, voltage-driven power semiconductor device composed of a BJT (Bipolar Junction Transistor) and a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). It combines the advantages of the high input impedance of a MOSFET and the low on-state voltage drop of a GTR. It is ideally suited for applications in converter systems with DC voltages of 600V and above, such as AC motors, frequency converters, switching power supplies, lighting circuits, and traction drives.

[0003] The thermal testing of IGBT modules requires a pressure control device to provide stable and precise pressure control. This helps simulate the pressure environment of the IGBT module under actual operating conditions, thereby ensuring the accuracy and reliability of the test results. However, since IGBT modules sometimes operate under constant pressure and sometimes under variable pressure in actual operation, existing pressure control devices cannot simulate these two pressure environments, leading to various inconveniences in the thermal testing process.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] This invention addresses the shortcomings of the prior art by providing a pressure control device for IGBT thermal testing, which can simulate both constant and variable pressure environments, and allows for easy switching between the two pressure environments, making the thermal testing process more convenient and efficient.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] The pressure control device for IGBT thermal testing includes a T-shaped seat, the top of which is fixedly connected to a vertically arranged rotating shaft, and the top of the rotating shaft is rotatably connected to a crossbeam through a connector.

[0008] The upper part of the T-shaped seat is equipped with a screw and a slide rod arranged in a vertical direction. The screw is connected to the T-shaped seat by a thread, and the slide rod is slidably connected to the T-shaped seat.

[0009] The bottom of the screw is rotatably mounted in the slide, and a pressure rod is installed below the slide in a vertical direction. An insulated pressure head A is installed at the bottom of the pressure rod.

[0010] A ring-shaped weight is fitted onto the main body of the slide rod, and an insulated pressure head B is installed at the bottom end of the slide rod.

[0011] Furthermore, one end of the crossbeam is connected to a vertically installed upright via a connecting seat, the connecting seat having a self-locking function, and the upright being fixed to the base.

[0012] Furthermore, a cold plate is also installed above the base.

[0013] Furthermore, the cold plate is connected to the base via a hollow support shaft.

[0014] Furthermore, the T-shaped seat is provided with threaded holes for mounting screws and through holes for mounting slide bars.

[0015] Furthermore, the slide block is slidably disposed within the groove at the lower part of the main body of the T-shaped seat.

[0016] Furthermore, a knob is fixedly installed on the top of the screw.

[0017] Furthermore, a pressure sensor is installed at the connection between the pressure rod and the slide.

[0018] Furthermore, the slide bar is provided with a limiting ring fixedly connected to it, and a ring-shaped weight is placed above the limiting ring.

[0019] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0020] This invention can simulate two pressure environments: constant pressure and variable pressure. The two pressure environments can be switched by rotating 180°, making the thermal testing process more convenient and efficient.

[0021] When simulating a constant pressure environment, rotate the slide bar above the cold plate, and install a ring weight of constant weight on the slide bar as required. The weight of the ring weight is used as the downward pressure to press on the sample to be tested. The pressure on the sample to be tested is the sum of the weights of the ring weight, the slide bar, and the insulated pressure head B.

[0022] When simulating a variable pressure environment, rotate the pressure bar above the cold plate, and press the adiabatic pressure head A against the sample by turning the knob. The pressure on the sample can be adjusted by the knob, and the pressure on the sample can be obtained in real time by the pressure sensor.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0025] Fig. 2 This is a structural cross-sectional view of the present invention;

[0026] Fig. 3This is a schematic diagram showing the connection between the T-shaped seat and the slide.

[0027] In the figure, 1-T-shaped seat, 2-rotating shaft, 3-connector, 4-crossbeam, 5-upright pole, 6-connecting seat, 7-base, 8-cold plate, 9-support shaft, 10-screw, 11-slide rod, 12-slide seat, 13-slide groove, 14-pressure sensor, 15-pressure rod, 16-insulated pressure head A, 17-ring weight, 18-insulated pressure head B, 19-sample under test. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0029] like Figs. 1-3 As shown in the figure, this utility model provides a pressure control device for IGBT thermal testing, including a T-shaped seat 1. The top of the T-shaped seat 1 is fixedly connected to a vertically arranged rotating shaft 2. The top of the rotating shaft 2 is rotatably connected to a crossbeam 4 through a connector 3. The T-shaped seat 1 and the rotating shaft 2 can rotate at a certain angle along the connector 3, thereby switching between constant pressure and variable pressure environments.

[0030] One end of the crossbeam 4 is connected to the vertically installed upright 5 via a connecting seat 6. The connecting seat 6 has a self-locking function, and the upright 5 is fixed above the base 7.

[0031] A cold plate 8 is also installed above the base 7, and the cold plate 8 is connected to the base 7 by a hollow support shaft 9. The cold plate 8 provides a heat dissipation environment for the sample 19 under test, and the hollow design of the support shaft 9 facilitates wiring and pipe laying.

[0032] The upper part of the main body of the T-shaped seat 1 is equipped with a screw 10 and a slide rod 11 arranged in a vertical direction. The T-shaped seat 1 is provided with a threaded hole for installing the screw 10 and a through hole for installing the slide rod 11. The screw 10 is threadedly connected to the T-shaped seat 1, and the slide rod 11 is slidably connected to the T-shaped seat 1.

[0033] The bottom of the screw 10 is rotatably mounted inside the slide block 12, which is slidably disposed in the groove 13 at the lower part of the main body of the T-shaped seat 1. A knob is fixedly mounted on the top of the screw 10. By rotating the knob, the slide block 12 can be driven to rise and fall along the groove 13.

[0034] A pressure rod 15, arranged vertically, is installed below the slide 12. A pressure sensor 14 is installed at the connection between the pressure rod 15 and the slide 12. An insulated pressure head A16 is installed at the bottom of the pressure rod 15. The insulated pressure head A16 is used to press down on the sample 19 to be tested. The pressure sensor 14 is used to detect the pressure on the sample 19 to be tested in real time. The magnitude of the pressure on the sample 19 to be tested can be adjusted by a knob.

[0035] The slide rod 11 can slide up and down within the T-shaped seat 1. A limiting ring is fixedly connected to the main body of the slide rod 11. A ring-shaped weight 17 is placed above the limiting ring and fitted onto the main body of the slide rod 11. The weight of the ring-shaped weight 17 can be selected according to requirements. An insulated pressure head B18 is installed at the bottom end of the slide rod 11. The insulated pressure head B18 is used to press down on the sample 19 being tested.

[0036] The specific working principle of this utility model is as follows:

[0037] This invention can simulate both constant pressure and variable pressure environments.

[0038] When simulating a constant pressure environment, rotate the slide bar 11 above the cold plate 8, place the sample to be tested 19 on the cold plate 8 and below the adiabatic pressure head B18, and then install a ring weight 17 of constant weight on the slide bar 11 as required. The weight of the ring weight 17 is used as the downward pressure to press the sample to be tested 19. The pressure on the sample to be tested 19 is the sum of the weights of the ring weight 17, the slide bar 11 and the adiabatic pressure head B18.

[0039] When simulating a variable pressure environment, rotate the pressure rod 15 above the cold plate 8, place the sample 19 to be tested on the cold plate 8 and below the adiabatic pressure head A16, and press the sample 19 to be tested by rotating the knob. The magnitude of the pressure on the sample 19 can be adjusted by the knob, and the magnitude of the pressure on the sample 19 can be obtained in real time by the pressure sensor 14.

[0040] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A pressure control device for IGBT thermal testing, characterized in that: It includes a T-shaped seat (1), the top of which is fixedly connected to a vertically arranged rotating shaft (2), and the top of the rotating shaft (2) is rotatably connected to the crossbeam (4) through a connector (3); The upper part of the main body of the T-shaped seat (1) is equipped with a screw (10) and a slide rod (11) arranged in the vertical direction. The screw (10) is connected to the T-shaped seat (1) by a thread, and the slide rod (11) is slidably connected to the T-shaped seat (1). The bottom of the screw (10) is rotatably installed in the slide (12), and a pressure rod (15) is installed below the slide (12) in a vertical direction. An insulated pressure head A (16) is installed at the bottom of the pressure rod (15). A ring weight (17) is fitted on the main body of the slide rod (11), and an insulated pressure head B (18) is installed at the bottom end of the slide rod (11).

2. The pressure control device for IGBT thermal testing as described in claim 1, characterized in that: One end of the crossbeam (4) is connected to the vertically set upright (5) through the connecting seat (6). The connecting seat (6) has a self-locking function, and the upright (5) is fixed above the base (7).

3. The pressure control device for IGBT thermal testing as described in claim 2, characterized in that: A cold plate (8) is also installed above the base (7).

4. The pressure control device for IGBT thermal testing as described in claim 3, characterized in that: The cold plate (8) and the base (7) are connected by a hollow support shaft (9).

5. The pressure control device for IGBT thermal testing as described in claim 1, characterized in that: The T-shaped seat (1) is provided with a threaded hole for installing the screw (10) and a through hole for installing the slide (11).

6. The pressure control device for IGBT thermal testing as described in claim 1, characterized in that: The slide (12) is slidably disposed in the groove (13) at the lower part of the main body of the T-shaped seat (1).

7. The pressure control device for IGBT thermal testing as described in claim 1, characterized in that: A knob is fixedly installed on the top of the screw (10).

8. The pressure control device for IGBT thermal testing as described in claim 1, characterized in that: A pressure sensor (14) is installed at the connection between the pressure rod (15) and the slide (12).

9. The pressure control device for IGBT thermal testing as described in claim 1, characterized in that: The slide bar (11) has a limiting ring fixedly connected to it, and a ring weight (17) is placed above the limiting ring.

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