CN115967257A - Power module - Google Patents
Power module Download PDFInfo
- Publication number
- CN115967257A CN115967257A CN202310025072.0A CN202310025072A CN115967257A CN 115967257 A CN115967257 A CN 115967257A CN 202310025072 A CN202310025072 A CN 202310025072A CN 115967257 A CN115967257 A CN 115967257A
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- Prior art keywords
- power module
- screw hole
- mounting surface
- mounting groove
- screw
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- 238000005192 partition Methods 0.000 claims abstract description 24
- 239000004519 grease Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a power module, which comprises: the heat radiator comprises a heat radiator, a first screw hole and a second screw hole, wherein one side surface of the heat radiator is a mounting surface, the mounting surface is provided with an inwards-recessed mounting groove, and the edge position of the mounting surface is provided with a plurality of first screw holes which are mutually spaced in a penetrating manner; the power module is attached and fixed in the mounting groove; the partition plate is attached to the mounting surface and covers the side face, far away from the mounting groove, of the power module, and a second screw hole penetrates through the partition plate at a position corresponding to each first screw hole; the electric control board is attached to one side, far away from the mounting surface, of the partition board, and a third screw hole penetrates through the position, corresponding to each second screw hole, of the electric control board; a plurality of screws; a plurality of nuts. The power module can avoid the phenomenon of edge breakage or cracking caused by extrusion of the shell of the power module, and ensures the integrity of the power module.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a power module.
Background
An Intelligent Power Module, namely MIPM (Module Intelligent Power System), which is a Power-driven product combining Power electronics and integrated circuit technology; the intelligent power module not only integrates the power switch device and the driving circuit, but also is internally provided with fault detection circuits such as overvoltage, overcurrent and overheat, and the like, and can transmit detection signals to a CPU or a DSP for terminal processing. The intelligent power module mainly comprises a high-speed low-power-consumption tube core, an optimized gate-level driving circuit and a quick protection circuit, and can not be damaged even if a load accident or improper use occurs, so that the intelligent power module is widely applied to the fields of industrial control, household appliances and the like.
When the intelligent power module works, the power devices such as an IGBT (insulated gate bipolar transistor) and an FRD (fast recovery diode) inside the intelligent power module can generate larger heat, so that a heat dissipation structure needs to be additionally arranged to realize quick heat dissipation. In the conventional heat dissipation structure, after an external electric control board is installed, a heat radiator is installed on the back of an intelligent power module to accelerate heat exchange between the intelligent power module and an external space.
When the radiator is installed, the radiator and the intelligent power module are fixed on the electric control board together by using a screw matched nut, therefore, screw holes for installing screws are reserved between the radiator and the intelligent power module and between the intelligent power module and the electric control board, but because the electric control board is made of a PCB material, in the process of screwing the nut, the electric control board can generate micro-deformation to extrude the edge of the screw hole of the intelligent power module, and the shell of the intelligent power module is formed by injection molding of a resin material, so that the intelligent power module is hard and brittle in texture, and is easy to generate the phenomenon of edge breakage or cracking after being extruded.
Disclosure of Invention
The invention aims to provide a power module to solve the problem that an existing intelligent power module is prone to edge breakage or cracking caused by extrusion when being installed with a radiator and an electric control board.
In order to solve the above problem, the present invention provides a power module, which includes:
the radiator comprises a radiator, wherein one side surface of the radiator is a mounting surface, the mounting surface is provided with an inwards recessed mounting groove, and a plurality of first screw holes which are spaced from each other penetrate through the edge position of the mounting surface;
the power module is attached and fixed in the mounting groove;
the partition plate is attached to the mounting surface and covers the side face, far away from the mounting groove, of the power module, and a second screw hole penetrates through the position, corresponding to each first screw hole, of the partition plate;
the electric control board is attached to one side, far away from the mounting surface, of the partition board, and a third screw hole penetrates through the position, corresponding to each second screw hole, of the electric control board;
a plurality of screws, each of which sequentially passes through the corresponding first screw hole, the second screw hole and the third screw hole;
and the screw is close to one end of the third screw hole.
Preferably, the first screw holes include two and are oppositely disposed.
Preferably, two fourth screw holes are oppositely arranged at the edge position of the power module; the mounting groove corresponds every the position of fourth screw hole all is provided with the column arch that an outside protrusion extends the formation, the column arch extends to corresponding in the fourth screw hole.
Preferably, the fourth screw hole extends to an edge of the power module and has a semi-cylindrical shape.
Preferably, the power module is fixed in the mounting groove through heat-conducting silicone grease.
Preferably, the heat sink is made of copper or aluminum.
Preferably, a plurality of radiating fins are arranged on one side of the radiator away from the mounting surface at intervals.
Preferably, each pin of the power module is provided with a welding hole corresponding to the electric control board, and each pin of the power module is welded to the corresponding welding hole.
Compared with the prior art, the power module is characterized in that the mounting surface of the radiator is provided with the inward-sunken mounting groove, the power module is fixedly attached in the mounting groove, the partition plate covering the power module is attached to the mounting surface, and finally, the power module passes through the first screw hole in the radiator, the second screw hole in the partition plate and the third screw hole in the electric control plate in sequence through the screws, and the nut is screwed to complete the mounting.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an exploded view of an overall structure of a power module according to an embodiment of the present invention;
fig. 2 is an exploded view of a screw and a nut of a power module according to an embodiment of the present invention;
fig. 3 is an exploded view of an electric control board in a power module according to an embodiment of the present invention;
fig. 4 is an exploded view of a partition board in a power module according to an embodiment of the present invention;
fig. 5 is an exploded view of a partition board when a power module is not installed in a power module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a power module in a power module according to an embodiment of the present invention;
fig. 7 is a front view of an overall structure of a power module according to an embodiment of the present invention;
fig. 8 is a side view of an overall structure of a power module according to an embodiment of the invention.
100. A power module; 1. a heat sink; 11. a mounting surface; 12. mounting grooves; 13. a first screw hole; 14. columnar bulges; 15. heat dissipation fins; 2. a power module; 21. a fourth screw hole; 22. a pin; 3. a partition plate; 31. a second screw hole; 4. an electric control board; 41. a third screw hole; 42. welding the hole; 5. a screw; 6. and (4) a nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the invention provides a power module 100, which is shown in fig. 1 to 8 and includes a heat sink 1, a power module 2, a partition plate 3, an electric control board 4, a plurality of screws 5, and a plurality of nuts 6.
Specifically, one side surface of the heat sink 1 is a mounting surface 11, the mounting surface 11 is provided with an inwardly recessed mounting groove 12, and a plurality of first screw holes 13 spaced from each other are arranged at the edge of the mounting surface 11 in a penetrating manner; the power module 2 is fixedly attached in the mounting groove 12; the partition plate 3 is attached to the mounting surface 11 and covers the side surface, far away from the mounting groove 12, of the power module 2, and a second screw hole 31 penetrates through the partition plate 3 at a position corresponding to each first screw hole 13; the electric control board 4 is attached to one side of the partition board 3 far away from the mounting surface 11, and a third screw hole 41 penetrates through the electric control board 4 at a position corresponding to each second screw hole 31.
Specifically, each screw 5 sequentially passes through the corresponding first screw hole 13, second screw hole 31 and third screw hole 41; each nut 6 is sleeved on one end of one screw 5 close to the third screw hole 41.
The power module 2 is a core device of a direct current frequency conversion technology, and mainly includes a main body, a housing formed outside the main body through injection molding of an epoxy resin material and realizing sealing, and a plurality of pins 22 electrically connected with the main body and extending outwards through the housing, wherein the housing is used for protecting an internal structure, and the pins 22 are used for realizing electrical connection with an external electronic control board 4.
The partition plate 3 is used for assisting in fixing the radiator 1 and preventing the electric control board 4 from extruding the power module 2 when the screw cap 6 is screwed.
In this embodiment, the first screw holes 13 include two and are oppositely disposed. The arrangement can avoid the problem that the process is complicated due to the excessive number of the screw holes 5, and can also realize the stable installation of the radiator 1, the power module 2 and the electric control board 4.
In the embodiment, the radiator 1 is made of copper or aluminum by CNC equipment; a plurality of radiating fins 15 are arranged at intervals on one side of the radiator 1 far away from the mounting surface 11. It utilizes the good heat conduction performance of copper or aluminum to accelerate the propagation of internal heat, and increases the surface area of the heat sink 1 through the sheet-shaped heat dissipation fins 15 to accelerate the heat exchange between the heat sink 1 and the surrounding environment.
In this embodiment, two fourth screw holes 21 are oppositely disposed at the edge of the power module 2; the mounting groove 12 is provided with a column-shaped protrusion 14 protruding outwards and extending at a position corresponding to each fourth screw hole 21, and the column-shaped protrusion 14 extends into the corresponding fourth screw hole 21. This arrangement can better ensure that the power module 2 is more stably attached and fixed in the mounting groove 12.
In this embodiment, the mounting surfaces 11 and the bottom of the mounting groove 12 are both smooth planes, and before the power module 2 is mounted, a layer of heat-conducting silicone grease (not shown) is coated on the bottom of the mounting groove 12, so as to prevent an air layer from existing between the power module 2 and the mounting groove 12 and affecting the heat dissipation effect.
In this embodiment, the fourth screw hole 21 extends to the edge of the power module 2 and is semi-cylindrical.
In this embodiment, the power module 2 is fixed in the mounting groove 12 by attaching heat-conducting silicone grease. After the installation is finished, the heat-conducting silicone grease extruded from the gap needs to be cleaned.
In this embodiment, the partition plate 3 is attached to the mounting surface 11 and covers the side surface of the power module 2 far away from the mounting groove 12, so that the power module 2 can be closely attached to the radiator 1 after being mounted, and the heat dissipation effect is improved.
In this embodiment, the position of the electronic control board 4 corresponding to each pin 22 of the power module 2 is provided with a welding hole 42, and each pin 22 of the power module 2 is welded to the corresponding welding hole 42. During welding, firstly, solder paste is coated on the welding position of the pin 22 and the electric control board 4, then the solder paste is heated by a hot air gun to be molten, so that the pin 22 is welded on the electric control board 4, and when a small amount of power modules 2 are assembled, electric soldering iron and a solder wire can be used for welding.
When the power module 100 in this embodiment is installed, the power module 2 is first attached to the mounting surface 11 of the heat sink 1 through the heat-conducting silicone grease, then the second screw hole 31 of the partition plate 3 is aligned with the first screw hole 13 of the heat sink 1 and pressed, then the third screw hole 41 of the electric control board 4 is aligned with the second screw hole 31 of the partition plate 3 and pressed, then the pin 22 of the power module 2 is aligned with the welding hole 42 on the electric control board 4, and finally the screw 5 and the nut 6 are installed and the pin 22 is welded to complete the installation.
Compared with the prior art, in the power module 100 in the embodiment, the mounting surface 11 of the heat sink 1 is provided with the inward-recessed mounting groove 12, the power module 2 is attached and fixed in the mounting groove 12, the partition plate 3 covering the power module 2 is attached to the mounting surface 11, and finally the screw 5 sequentially penetrates through the first screw hole 13 on the heat sink 1, the second screw hole 31 on the partition plate 3 and the third screw hole 41 on the electric control board 4, and the nut is screwed to complete the mounting; meanwhile, the assembly time of the power module 2 and the radiator 1 is saved, so that the production efficiency is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A power module, comprising:
the radiator comprises a radiator, wherein one side surface of the radiator is a mounting surface, the mounting surface is provided with an inwards-recessed mounting groove, and a plurality of first screw holes which are spaced from each other penetrate through the edge position of the mounting surface;
the power module is attached and fixed in the mounting groove;
the partition plate is attached to the mounting surface and covers the side face, far away from the mounting groove, of the power module, and a second screw hole penetrates through the position, corresponding to each first screw hole, of the partition plate;
the electric control board is attached to one side, far away from the mounting surface, of the partition board, and a third screw hole penetrates through the position, corresponding to each second screw hole, of the electric control board;
a plurality of screws, each of which sequentially passes through the corresponding first screw hole, the second screw hole and the third screw hole;
and the screw is close to one end of the third screw hole.
2. The power module as claimed in claim 1, wherein the first screw holes comprise two and are oppositely disposed.
3. The power module according to claim 1, wherein two fourth screw holes are oppositely arranged at the edge position of the power module; the mounting groove corresponds every the position of fourth screw hole all is provided with the column arch that an outside protrusion extends the formation, the column arch extends to corresponding in the fourth screw hole.
4. The power module of claim 3, wherein the fourth screw hole extends to an edge of the power module and has a semi-cylindrical shape.
5. The power module of claim 1, wherein the power module is mounted in the mounting groove by a thermally conductive silicone grease.
6. The power module of claim 1 wherein said heat sink is made of copper or aluminum.
7. The power module of claim 1 wherein a plurality of fins are spaced apart from one side of the heat sink remote from the mounting surface.
8. The power module as claimed in claim 1, wherein the electrical control board is provided with a soldering hole corresponding to each pin of the power module, and each pin of the power module is soldered to the corresponding soldering hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310025072.0A CN115967257A (en) | 2023-01-09 | 2023-01-09 | Power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310025072.0A CN115967257A (en) | 2023-01-09 | 2023-01-09 | Power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115967257A true CN115967257A (en) | 2023-04-14 |
Family
ID=87363326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310025072.0A Pending CN115967257A (en) | 2023-01-09 | 2023-01-09 | Power module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115967257A (en) |
-
2023
- 2023-01-09 CN CN202310025072.0A patent/CN115967257A/en active Pending
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