CN219591376U

CN219591376U - IGBT protection device

Info

Publication number: CN219591376U
Application number: CN202223394625.XU
Authority: CN
Inventors: 王学合; 尤伟松
Original assignee: Shanghai Lingang Chegui Semiconductor Research Co ltd
Current assignee: Shanghai Lingang Chegui Semiconductor Research Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-08-25
Anticipated expiration: 2032-12-19

Abstract

The utility model relates to the technical field of IGBT modules and discloses an IGBT protection device, which comprises a substrate, wherein a plastic shell is arranged at the top of the substrate, four inserting posts are respectively and fixedly connected to the bottom of the plastic shell, four slots are respectively formed in the top of the substrate, clamping grooves are formed in the slot walls of the four slots, and a buckle is fixedly connected to each inserting post. The centrifugal fan is used for exhausting air from the radiating groove and the radiating hole, and when the substrate is fixed, the top opening of the fan mounting chamber is closed, considering that the substrate is generally mounted on the mounting plate.

Description

IGBT protection device

Technical Field

The utility model relates to the technical field of IGBT modules, in particular to an IGBT protection device.

Background

IGBT (InsulatedGateBipolarTransistor) the insulated gate bipolar transistor is a compound full-control voltage-driven power semiconductor device composed of BJT (bipolar transistor) and MOS (insulated gate field effect transistor), and has the advantages of high input impedance of MOSFET and low conduction voltage drop of GTR. The IGBT belongs to a high-power driving element, and is very suitable for being applied to the fields of a variable current system with a direct current voltage of 600V and above, such as an alternating current motor, a frequency converter, a switching power supply, a lighting circuit, traction transmission and the like.

The shell of current IGBT module is the plastics material, plays the radiating effect, and current shell inconvenient dismantlement, and unusual difficultly when leading to the IGBT module to need overhaul leads to the IGBT module in use, often can appear burning out the condition. For this reason, we propose an IGBT protection device to solve the problems proposed by the background art.

Disclosure of Invention

The utility model aims to provide an IGBT protection device, so as to solve the problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the IGBT protection device comprises a substrate, wherein a plastic shell is arranged at the top of the substrate, four inserting posts are fixedly connected to the bottom of the plastic shell respectively, and four slots are formed in the top of the substrate respectively;

clamping grooves are formed in the groove walls of the four slots, and each inserting column is fixedly connected with a buckle.

Preferably, the bottom inner wall fixedly connected with welt of plastic casing, two chips of top fixedly connected with respectively, two electric connection has bonding lead between the chip, and bonding lead's both ends are connected with the welt, plastic casing's top fixedly connected with grid, projecting pole, collecting electrode respectively, the top of welt is connected with female row electrode, female row electrode's top is connected with the welding layer, welding layer fixed connection is at plastic casing's top inner wall.

Preferably, the plastic shell is filled with silica gel, and the silica gel has high adsorption performance, good thermal stability, stable chemical property and higher mechanical strength.

Preferably, the bottom of the substrate is abutted against the external fan, the side wall of the substrate is provided with substrate ventilation holes, and the GBT module effectively dissipates heat by the substrate.

Preferably, the top of the welding layer is connected with a PCB, the PCB is connected to the top inner wall of the plastic shell, and the overall stability of the GBT module is improved through the arranged welding layer.

Preferably, the four inserting posts are respectively abutted with the four inserting grooves, and the clamping buckles are clamped with the clamping grooves, so that the plastic shell can be conveniently detached.

The utility model provides an IGBT protection device. The beneficial effects are as follows:

(1) According to the utility model, the centrifugal fan is used for exhausting air from the radiating groove and the radiating hole, and the substrate is generally arranged on the mounting plate, so that after the substrate is fixed, the top opening of the fan mounting chamber is in a closed state.

(2) According to the utility model, the overall stability of the GBT module is increased through the arranged welding layer, the silica gel is high in adsorption performance, good in thermal stability and stable in chemical property, and has higher mechanical strength, the plug posts are respectively abutted with the four slots, and the buckle is conveniently clamped with the clamping groove to detach the plastic shell.

Drawings

FIG. 1 is a front view of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a bottom view of the present utility model;

fig. 4 is a schematic structural view of the present utility model.

In the figure: 1. a substrate; 2. a plastic housing; 3. a gate; 4. an emitter; 5. a collector electrode; 6. a PCB; 7. a busbar electrode; 8. a chip; 9. bonding wires; 10. a welding layer; 11. a lining plate; 12. a slot; 13. inserting a column; 14. a buckle; 15. a clamping groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

As shown in fig. 1-4, the utility model provides an IGBT protection device, which comprises a substrate 1, wherein the bottom of the substrate 1 is abutted against an external fan, the side wall of the substrate 1 is provided with substrate ventilation holes, the GBT module effectively dissipates heat by the substrate 1, the top of the substrate 1 is provided with a plastic shell 2, the bottom of the plastic shell 2 is respectively and fixedly connected with four inserting posts 13, the top of the substrate 1 is respectively provided with four inserting slots 12, the slot walls of the four inserting slots 12 are respectively provided with a clamping slot 15, each inserting post 13 is fixedly connected with a clamping buckle 14, the four inserting posts 13 are respectively abutted against the four inserting slots 12, and the clamping buckles 14 are clamped with the clamping slots 15, so that the plastic shell 2 is convenient to detach.

In this embodiment, the air is discharged from the heat sink and the heat dissipation hole through the centrifugal fan, considering that the substrate 1 is generally mounted on the mounting board, when the substrate 1 is fixed, the top opening of the fan mounting chamber is in a closed state, and if no external air supplements the air in the centrifugal fan, a negative pressure is formed in the fan mounting chamber, so that the effect of rapid heat dissipation cannot be achieved.

Example 2

As shown in fig. 1-4, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the bottom inner wall fixedly connected with welt 11 of plastic housing 2, the top of welt 11 is two chips 8 of fixedly connected with respectively, electric connection has bonding wire 9 between two chips 8, bonding wire 9's both ends are connected with welt 11, plastic housing 2's top is fixedly connected with grid 3 respectively, projecting pole 4, collecting electrode 5, welt 11's top is connected with female row electrode 7, female row electrode 7's top is connected with welding layer 10, welding layer 10 fixed connection is at plastic housing 2's top inner wall, welding layer 10's top is connected with PCB6, PCB6 connects at the top inner wall just plastic housing 2, the overall stability of GBT module has been increased through the welding layer 10 that sets up, plastic housing 2's inside is filled through silica gel, silica gel adsorption efficiency is high, good heat stability, stable chemical property, have higher mechanical strength.

In this embodiment, through silica gel adsorption performance is high, thermal stability is good, chemical property is stable, have higher mechanical strength, through the welding layer 10 that sets up increased GBT module's overall stability, through inserting post 13 respectively with four slot 12 butt, and buckle 14 and draw-in groove 15 joint are convenient to dismantle plastics shell 2.

When using, centrifugal fan discharges air from radiating groove and louvre, consider base plate 1 generally to install on the mounting panel, after base plate 1 is fixed, fan mount chamber top opening is closed state, if do not external air supplement centrifugal fan in the air, then the indoor negative pressure that has formed of fan mount, thereby can not reach quick radiating effect, high through silica gel adsorption performance, good thermal stability, the chemical nature is stable, have higher mechanical strength, the overall stability of GBT module has been increased through the welding layer 10 that sets up, through inserting post 13 respectively with four slot 12 butt, and buckle 14 and draw-in groove 15 joint are convenient to dismantle plastics shell 2.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. An IGBT protection device comprising a substrate (1), characterized in that: the top of the base plate (1) is provided with a plastic shell (2), the bottom of the plastic shell (2) is fixedly connected with four inserting columns (13) respectively, and the top of the base plate (1) is provided with four inserting slots (12) respectively;

clamping grooves (15) are formed in the groove walls of the four slots (12), and each inserting column (13) is fixedly connected with a buckle (14).

2. The IGBT protection device according to claim 1, wherein: the plastic shell is characterized in that a lining plate (11) is fixedly connected to the inner wall of the bottom of the plastic shell (2), two chips (8) are fixedly connected to the top of the lining plate (11) respectively, bonding leads (9) are electrically connected between the chips (8), two ends of each bonding lead (9) are connected with the lining plate (11), grid electrodes (3), emitting electrodes (4) and collecting electrodes (5) are fixedly connected to the top of the plastic shell (2) respectively, busbar electrodes (7) are connected to the top of the lining plate (11), welding layers (10) are connected to the top of the busbar electrodes (7), and the welding layers (10) are fixedly connected to the inner wall of the top of the plastic shell (2).

3. The IGBT protection device according to claim 1, wherein: the inside of the plastic shell (2) is filled with silica gel.

4. The IGBT protection device according to claim 1, wherein: the bottom of the base plate (1) is abutted with an external fan, and the side wall of the base plate (1) is provided with base plate ventilation holes.

5. The IGBT protection device according to claim 2, wherein: the top of the welding layer (10) is connected with a PCB (6), and the PCB (6) is connected to the inner wall of the top of the plastic shell (2).

6. The IGBT protection device according to claim 1, wherein: the four inserting posts (13) are respectively abutted with the four inserting grooves (12), and the buckles (14) are clamped with the clamping grooves (15).