A power module

Abstract

The present application relates to a power module, comprising: an electrical module, a housing, and an insulation assembly; a first heat dissipation structure is provided on the mounting plate body of the housing; the insulation assembly includes a first insulation plate body and a second insulation plate body, both the first insulation plate body and the second insulation plate body are arranged perpendicular to the mounting plate body, the electrical module is fixedly connected to the first insulation plate body, and a first fluid gap is provided between the electrical module and the second insulation plate body. By installing the electrical module through the first insulation plate body and the second insulation plate body, on the basis of playing an insulation and protection role, the insulation structure design of the electrical module in the power module is simplified, and the heat dissipation effect of the electrical module is increased through the first fluid gap provided between the electrical module and the second insulation plate body. The present application effectively solves the problem that the insulation structure design of the electrical components in the power module in the prior art is complex, resulting in poor heat dissipation effect of the power module.

Description

Technical Field

[0001] This application relates to the technical field of power electronics, and particularly to a power module. Background Art

[0002] A power module is a core component in medium and high voltage, high current frequency converter equipment or power supply equipment. It is usually composed of a heat sink, semiconductor electrical components, and connecting busbars. Each component is cooled through the heat sink or a heat dissipation device, and each component is connected to the external circuit through the busbar.

[0003] In the fields of medium and high voltage and high power industrial drives or power systems, the structural arrangement of the electrical component part of the power module is relatively complex. Considerable work needs to be done in terms of insulation to avoid the influence of its working environment. The conventional application has a complex structural design, and individual electrical components need to be wrapped with multiple layers of insulating materials, resulting in poor heat dissipation effect of the electrical components, unable to meet the requirements of power equipment. Moreover, the installation and maintenance of the power module set up in this way are very difficult. During maintenance, professional engineering personnel and maintenance skills are required. Summary of the Invention

[0004] This application provides a power module to solve the problem that the insulation structure design of the electrical components of the power module in the prior art is complex, resulting in poor heat dissipation effect of the power module.

[0005] This application provides a power module, including: an electrical module, a housing, and an insulation assembly; a first heat dissipation structure is provided on the mounting plate body of the housing; the insulation assembly includes a first insulation plate body and a second insulation plate body. Both the first insulation plate body and the second insulation plate body are perpendicular to the mounting plate body. The electrical module is fixedly connected to the first insulation plate body, and a first fluid gap is provided between the electrical module and the second insulation plate body.

[0006] Further, the electrical module includes electrical components and a plurality of second heat dissipation structures. The plurality of second heat dissipation structures are arranged around the electrical components, and a second fluid gap is provided between adjacent second heat dissipation structures. The port of the second fluid gap faces the first heat dissipation structure.

[0007] Further, the second heat dissipation structure is one of a profile heat sink or a fin heat sink.

[0008] Further, the electrical component is a disk-shaped thyristor, the second heat dissipation structure is a fin heat sink, the second heat dissipation structure has a plurality of fins, a third fluid gap is formed between adjacent fins, and part of the third fluid gap communicates with the second fluid gap.

[0009] Further, the insulation assembly includes two first insulation plate bodies and at least two second insulation plate bodies. Each first insulation plate body and each second insulation plate body are arranged perpendicular to each other. At least one electrical module is fixedly connected to each first insulation plate body respectively, and a first fluid gap is provided between the electrical module and each second insulation plate body.

[0010] Further, there are multiple electrical modules, and each electrical module is arranged in sequence along the length direction of the first insulation plate body. The first heat dissipation structure includes multiple fans, and each fan is arranged in sequence along the length direction of the first insulation plate body.

[0011] Further, the insulation assembly further includes a first insulation structure, which is arranged between the electrical module and the second insulation plate body. The length of the first insulation structure in the direction perpendicular to the mounting plate body is greater than the length of the electrical module in the direction perpendicular to the mounting plate body.

[0012] Further, bending regions are provided on both sides of the first insulation structure along the length direction of the first insulation plate body, and the bending regions are bent away from the first insulation plate body.

[0013] Further, a plurality of mounting holes are provided on the side of the first insulation plate body away from the electrical module. The electrical module and the first insulation plate body are fixedly connected by a plurality of threaded fasteners, and each threaded fastener is arranged in each mounting hole. A second insulation structure is provided on the side of the first insulation plate body away from the electrical module, and each mounting hole is located within the coverage range of the second insulation structure.

[0014] Further, bending regions are provided on both sides of the second insulation structure along the length direction of the first insulation plate body, and the bending regions are bent towards the first insulation plate body.

[0015] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0016] A power module provided by an embodiment of the present application includes: an electrical module, a housing, and an insulation assembly; a first heat dissipation structure is provided on the mounting plate body of the housing; the insulation assembly includes a first insulation plate body and a second insulation plate body, the first insulation plate body and the second insulation plate body are both perpendicular to the mounting plate body, the electrical module is fixedly connected to the first insulation plate body, the electrical module is fixedly connected to the first insulation plate body, and a first fluid gap is provided between the electrical module and the second insulation plate body. By installing the electrical module through the first insulation plate body and the second insulation plate body, on the basis of playing an insulating and protective role, the insulation structure design of the electrical module in the power module is simplified, and the heat dissipation effect of the electrical module is increased through the first fluid gap provided between the electrical module and the second insulation plate body. The present application effectively solves the problem that the insulation structure design of the electrical components in the power module in the prior art is complex, resulting in poor heat dissipation effect of the power module. Brief Description of the Drawings

[0017] The drawings herein are incorporated into and form a part of this specification, showing embodiments in accordance with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Shows a front view schematic diagram of a power module provided by an embodiment of the present application;

[0020] Figure 2 Shows Figure 1 A partially enlarged schematic diagram of the power module;

[0021] Figure 3 Shows Figure 1 An assembly schematic diagram of the first heat dissipation structure of the power module;

[0022] Figure 4 Shows Figure 1 An exploded view of the power module;

[0023] Figure 5 Shows Figure 1 An exploded view of some parts of the power module;

[0024] Figure 6 Shows Figure 1 A top view schematic diagram of the electrical module of the power module;

[0025] Figure 7 Shows Figure 6 A front view schematic diagram of the electrical appliance module;

[0026] Figure 8 Shows Figure 1 The internal circuit schematic diagram of the power module.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 10. Electrical module; 11. Electrical component; 12. Second heat dissipation structure; 13. Second fluid gap; 14. Balancing structure; 20. Housing; 21. Mounting plate body; 22. First side plate body; 23. Second side plate body; 24. Top plate; 25. Bottom plate; 26. Side wall wind deflector; 27. Bottom wind deflector; 28. Top hanging ear; 29. Bottom hanging ear; 30. Insulation assembly; 31. First insulation plate body; 32. Second insulation plate body; 33. First fluid gap; 34. First insulation structure; 35. Second insulation structure; 40. Power connection assembly; 41. Top copper busbar; 42. Side copper busbar; 43. Connecting copper busbar; 44. Busbar for current collection; 50. First heat dissipation structure. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0030] As Figure 1 and Figure 2 shown, an embodiment of the present application provides a power module, including: an electrical module 10, a housing 20 and an insulation assembly 30. A first heat dissipation structure 50 is provided on the mounting plate body 21 of the housing 20. The insulation assembly 30 includes a first insulation plate body 31 and a second insulation plate body 32. Both the first insulation plate body 31 and the second insulation plate body 32 are perpendicular to the mounting plate body 21. The electrical module 10 is fixedly connected to the first insulation plate body 31, and a first fluid gap 33 is provided between the electrical module 10 and the second insulation plate body 32. By installing the electrical module 10 through the first insulation plate body 31 and the second insulation plate body 32, on the basis of playing an insulation and protection role, the insulation structure design of the electrical module 10 in the power module is simplified. Through the first fluid gap 33 provided between the electrical module 10 and the second insulation plate body 32, the heat dissipation effect of the electrical module 10 is increased. The present application effectively solves the problem that the insulation structure design of the electrical components in the power module in the prior art is complex, resulting in poor heat dissipation effect of the power module.

[0031] It should be noted that in the prior art, the power module is a core component in the medium-voltage, high-current frequency converter equipment or the entire power supply equipment. Generally, it includes a radiator, semiconductor switching elements, and connecting busbars. Each component is connected to the radiator for heat dissipation, and the components are electrically connected through the connecting busbars. Switching elements such as disk-shaped thyristors are commonly used in the fields of medium-voltage and high-power industrial drives or power systems. The conventional application system design is complex, the installation and maintenance are very difficult, requiring professional engineering personnel and maintenance skills. The conflict between insulation and heat dissipation is serious, resulting in many problems in products using such switching elements. For example, they are bulky, heavy, have a low degree of modularization, are difficult to be serialized and modularized, are inconvenient for installation and maintenance, have prominent safety regulations issues, rely on special heat dissipation methods, such as relying on special heat dissipation medium deionized coolant, and a professional deionized liquid cooling circulation system, etc.; or rely on the system-level cabinet fan for heat dissipation, which is bulky, inconvenient for installation, and cannot be used independently. In the technical solution of this embodiment, the power module can be cooled by liquid cooling, that is, the fluid passing through the first fluid gap 33 is a coolant, or it can also be cooled by air cooling, that is, the fluid passing through the first fluid gap 33 is air or a cooling gas. When air cooling is selected for heat dissipation, the first heat dissipation structure 50 is a cooling fan. The air inlet of the cooling fan is communicated with the port of the first fluid gap 33, and the air in the first fluid gap 33 is taken out of the power module by the negative pressure generated by the cooling fan, and the heat dissipation effect is obvious. Since the first insulating plate body 31 and the second insulating plate body 32 completely wrap the electrical module 10, that is, no more insulation measures need to be taken. The first insulating plate body 31 and the second insulating plate body 32 are plate bodies with a certain thickness, which simplifies the entire structure, avoids multiple complex settings, reduces the volume of the power module, reduces the production materials and production processes, and is more conducive to production and manufacturing.

[0032] As Figure 1 , Figure 2 , Figure 6 and Figure 7 shown, in the technical solution of this embodiment, the electrical module 10 includes electrical components 11 and a plurality of second heat dissipation structures 12. The plurality of second heat dissipation structures 12 are arranged around the electrical components 11, and a second fluid gap 13 is provided between adjacent second heat dissipation structures 12. The port of the second fluid gap 13 faces the first heat dissipation structure 50. Arranging a plurality of second heat dissipation structures 12 around the electrical components 11 can dissipate the heat generated during use to the surroundings, improve the heat dissipation performance of the second heat dissipation structures 12, and a second fluid gap 13 can be provided between adjacent second heat dissipation structures 12. The second fluid gap 13 can increase the fluid throughput, that is, increase the heat carried away, so as to obtain a better heat dissipation effect.

[0033] In the technical solution of this embodiment (not shown in the figure), the second heat dissipation structure 12 is a type of profile radiator or finned radiator. When choosing a profile radiator, the corresponding optimal profile radiator can be selected according to the actual heat generation and heat dissipation requirements. When using a finned radiator, a fluid gap can be formed between its fins to facilitate the flow of the cooling medium and obtain a better heat dissipation effect.

[0034] As Figure 1 , Figure 2 , Figure 6 and Figure 7 shown, in the technical solution of this embodiment, the electrical component 11 is a disk-shaped thyristor, the second heat dissipation structure 12 is a finned radiator, the second heat dissipation structure 12 has a plurality of fins, and a third fluid gap is formed between adjacent fins. Part of the third fluid gap communicates with the second fluid gap 13. Using a disk-shaped thyristor can reduce the length in its axial direction, that is, the area of the disk shape serves as the heat dissipation transfer area, and there can be more overlapping space with the second heat dissipation structure 12 to facilitate heat dissipation. The third fluid gap and the second fluid gap 13 communicate, that is, the fluid can flow between the two to take away the heat. It should be noted that the main heat dissipation method adopted in this application is the convection heat dissipation method, and its cooling means is air cooling. The air flow directions of the second fluid gap 13 and the third fluid gap are the same, both perpendicular to the direction of the first heat dissipation structure 50. The disk-shaped thyristor is clamped by the second heat dissipation structures 12 on both sides to achieve heat dissipation on both sides. The side wall of the disk-shaped thyristor is located in the second fluid gap 13 and is directly in contact with the air to achieve cooling; specifically, there are two disk-shaped thyristors. The second heat dissipation structures 12 on one side of the two disk-shaped thyristors are fixedly adjacent to form an integrally formed structure, and the second heat dissipation structures 12 on the other side have a fixed interval distance. The advantage of such a setting is to install the disk-shaped thyristors based on the longer second heat dissipation structure 12, and then assemble the shorter second heat dissipation structure 12. The assembly reference is the same, and the formed fluid gaps are aligned with each other after assembly, which is convenient for the rapid flow of air, and the impact on subsequent assembly is relatively low after assembly, and the structure can be more compact.

[0035] As Figure 2 shown, in the technical solution of this embodiment, the second heat dissipation structure 12 has main fins and auxiliary fins. The main fins extend obliquely outward. Auxiliary fins extend on the side of the main fins close to the first insulating plate body 31. The thickness of the auxiliary fins is small, and the extending direction is perpendicular to the first insulating plate body 31. A small main fin extends on the side of the main fins away from the first insulating plate body 31, and auxiliary fins extending in the directions perpendicular to the first insulating plate body 31 and the second insulating plate body 32 are respectively provided on the small main fin. The adjacent auxiliary fins are parallel to each other, which can better achieve heat dissipation.

[0036] It should be noted that as Figure 2 , Figure 5 andFigure 7 As shown, in the technical solution of this embodiment, the end of the main fin of the second heat dissipation structure 12 has two through slots, the through slots penetrate in a direction perpendicular to the mounting plate body 21, and for the through slot close to the first insulating plate body 31, an opening is provided on the side facing the first insulating plate body 31, and the height of the opening in the vertical direction is less than the height of the through slot body in the vertical direction; for the through slot close to the second insulating plate body 32, an opening is provided on the side facing the second insulating plate body 32, and the width of the opening in the horizontal direction is less than the width of the through slot body in the horizontal direction. Such a setting facilitates the installation of fasteners. The fastener is a bolt, the nut of the bolt is located in the slot body, and the screw rod can extend out through the opening. The setting of the slot body limits the sliding direction of the bolt and can achieve precise positioning. The through slot facing the first insulating plate body 31 is used for the fixed installation of the second heat dissipation structure 12, and the through slot on the other side is used for the installation of the top copper row 41 at the top.

[0037] As Figures 1 to 5 As shown, in the technical solution of this embodiment, the insulating component 30 includes two first insulating plate bodies 31 and at least two second insulating plate bodies 32. Each first insulating plate body 31 and each second insulating plate body 32 are arranged perpendicular to each other. At least one electrical module 10 is fixedly connected to each first insulating plate body 31 respectively, and a first fluid gap 33 is provided between the electrical module 10 and each second insulating plate body 32. Such a setting confines the electrical module 10 in a fixed space, and there are first fluid gaps 33 on both sides. While the structure is compact, the heat dissipation effect is better. The electrical module 10 is fixedly connected to the first insulating plate body 31 respectively, that is, the electrical module 10 is suspended by the insulating plate bodies on both sides. On the one hand, it completely avoids the contact between the electrical module 10 and the second insulating plate body 32. On the other hand, it makes the installation of the electrical module 10 in the power module more balanced, avoiding the situation that one side is prone to failure due to force. Such a setting makes the structure more compact, and the insulation and heat dissipation effects are better.

[0038] As Figures 1 to 5As shown, in the technical solution of this embodiment, there are multiple electrical modules 10, and each electrical module 10 is arranged in sequence along the length direction of the first insulating plate body 31. The first heat dissipation structure 50 includes multiple fans, and each fan is arranged in sequence along the length direction of the first insulating plate body 31. Such an arrangement facilitates the formation of the required electrical circuit and increases the functionality of the power module. The arrangement of multiple fans can correspond to the second heat dissipation structures 12 at different positions, so that the proportion of the effective docking area between the second heat dissipation structure 12 and the fans increases, and a better heat dissipation effect can be achieved in convective heat dissipation. It should be noted that for the selection of fans, fans with a relatively large effective area can be used, and it is not necessary to set them one-to-one corresponding to the second heat dissipation structure 12. In the technical solution of this embodiment, there are two fans and three electrical modules 10. Such an arrangement reduces the limitation of the cooperation between the fans and the electrical modules 10, and reduces the setting of the cooperation of components on the premise of ensuring the heat dissipation effect. On the side of the second heat dissipation structure 12 facing the first insulating plate body 31, there are two balance structures 14 for adjusting the distance between the second heat dissipation structure 12 and the first insulating plate body 31.

[0039] As Figure 1 and Figure 8 shown, in the technical solution of this embodiment, there are three electrical modules 10. A single electrical module 10 is composed of two thyristors connected in series. Through the top copper bar 41, side copper bar 42, connection copper bar 43 and busbar copper bar 44 in the power connection component 40, corresponding to different wiring positions. Specifically, three side copper bars 42 respectively lead out the AC R phase, AC S phase and AC T phase from top to bottom. The connection copper bar 43 and the busbar copper bar 44 connect the busbar P phase and the busbar N phase of the thyristors in parallel, and lead out the busbar P phase and the busbar N phase of the entire rectifier circuit through the top copper bar of the electrical module 10 respectively. Such an arrangement can increase the output current of the electrical module 10 to cooperate with the operation of the medium-voltage and high-current frequency converter equipment or the entire power supply equipment. The power module belongs to a modular power unit and can be used alone or in multiple series-parallel combinations to achieve capacity expansion. The setting of the hanging ears can be used for the transfer, docking and installation of the power module.

[0040] As Figure 3 and Figure 4As shown, in the technical solution of this embodiment, the housing 20 includes a mounting plate body 21, a first side plate body 22, a second side plate body 23, a top plate 24, a bottom plate 25, a side wall windscreen strip 26, a bottom windscreen strip 27, a top hanging ear 28, a bottom hanging ear 29, and a top windscreen strip. The mounting plate body 21 is fixedly connected to the first side plate body 22 and the second side plate body 23 respectively through threaded fasteners. The bottom plate 25 and the second side plate body 23 can be integrally formed by welding or bending, or can be fixedly connected through threaded fasteners. The bottom plate 25 is fixedly connected to the first side plate body 22 through threaded fasteners. The sides of the first side plate body 22 and the second side plate body 23 away from the bottom plate 25 are bent towards the side close to the insulation assembly 30, and the bending angle is 90 degrees. The two sides of the top plate 24 are provided with strip regions extending outwards. The strip region of the top plate 24 is located below the bending region, and finally, it is fixedly connected to the top windscreen strip through threaded fasteners. The first side plate body 22 and the second side plate body 23 are both fixedly connected to the top windscreen strip through threaded fasteners. A side wall windscreen strip 26 is arranged between the first insulating plate body 31, the first side plate body 22, and the second side plate body 23, and is fixedly connected through threaded fasteners. The first insulating plate body 31 and the side wall windscreen strip 26 are fixedly connected through threaded fasteners. The bottom plate 25 is provided with a bottom windscreen strip 27. The setting of each windscreen strip plays a connecting role and is also used to separate the insulation assembly from the housing 20. The housing is usually made of metal, and its electric potential is equivalent to that of the earth. Both ends of the radiator of the electrical module 10 are at high voltage, so isolation is required.

[0041] As Figures 3 to 5 shown, in the technical solution of this embodiment, the insulation assembly 30 further includes a first insulation structure 34. The first insulation structure 34 is arranged between the electrical module 10 and the second insulating plate body 32. The length of the first insulation structure 34 in the direction perpendicular to the mounting plate body 21 is greater than the length of the electrical module 10 in the direction perpendicular to the mounting plate body 21. Since both ends of the second heat dissipation structure 12 are at high voltage, there is still a risk of electric leakage in the first insulating plate body 31 and the second insulating plate body 32. The setting of the first insulation structure 34 can reduce the contact area between the second heat dissipation structure 12 and the first insulating plate body 31, thereby isolating the risk of electric leakage. The length of the first insulation structure 34 is greater than the length of the electrical module 10, that is, the surface of the second heat dissipation structure 12 facing the first insulating plate body 31 is completely arranged within the first insulation structure 34, maximizing the isolation of the risk of electric leakage.

[0042] As Figures 3 to 5As shown, in the technical solution of this embodiment, the first insulating structure 34 is provided with bending regions on both sides along the length direction of the first insulating plate body 31, and the bending regions are bent away from the first insulating plate body 31. Since the first insulating plate body 31 and the second insulating plate body 32 are two independent individuals and are connected by a connecting member, specifically a threaded fastener, there is a gap between the first insulating plate body 31 and the second insulating plate body 32. The gap is located at a corner of the second heat dissipation structure 12, and there is a risk of electric leakage from the gap. By setting the bending regions, the heat dissipation structure part closest to the above gap is isolated by the first insulating structure 34. It should be noted that through holes for the threaded fasteners to pass through are provided on the first insulating structure 34, and a counterbore is provided on the side of the first insulating plate body 31 away from the first insulating structure 34. Nuts can be correspondingly arranged in the counterbore for the threaded fasteners. The fixed through holes and counterbores achieve the positioning of the threaded fasteners, and the counterbore can hide the nuts inside the first insulating plate body 31. When the threaded fasteners are made of metal materials, it can avoid external electric leakage.

[0043] As Figure 4 and Figure 5 shown, in the technical solution of this embodiment, a plurality of mounting holes are provided on the side of the first insulating plate body 31 away from the electrical module 10. The electrical module 10 and the first insulating plate body 31 are fixedly connected by a plurality of threaded fasteners, and each threaded fastener is arranged in each mounting hole. A second insulating structure 35 is provided on the side of the first insulating plate body 31 away from the electrical module 10, and each mounting hole is within the coverage range of the second insulating structure 35. Setting the second insulating structure 35 can further isolate the first insulating plate body 31 from the housing 20, and at the same time reduce the spacing area between the first insulating plate body 31 and the housing 20. Cooperating with the windshield strip can further isolate the risk of electric leakage. It should be noted that when a counterbore is provided on one side of the first insulating plate body 31, the first insulating structure 34 can completely cover the counterbore, reducing the risk of electric leakage from the counterbore.

[0044] As Figure 4 and Figure 5As shown, in the technical solution of this embodiment, the second insulating structure 35 is provided with bending regions on both sides along the length direction of the first insulating plate body 31, and the bending regions are bent towards the direction close to the first insulating plate body 31. Such a setting can cover the gap on the side facing the housing 20 between the first insulating plate body 31 and the second insulating plate body 32, further reducing the risk of electric leakage. The length of the second insulating structure 35 along the direction perpendicular to the mounting plate body 21 is greater than the length of the second heat dissipation structure 12 in this direction. It should be noted that both the first insulating structure 34 and the second insulating structure 35 are insulating adhesive films, and the thickness of the insulating adhesive film is small and can be ignored in the power module. The insulating adhesive film is set for the areas where there may be a risk of electric leakage, ensuring the insulating effect. In addition, the thickness of the insulating adhesive film is small, saving the design of other insulating structures, thereby reducing the setting of other components. While streamlining the structure, it also reduces the overall weight of the power module and the production cost. It has the advantages of high heat dissipation efficiency, convenient arrangement and combination, simple installation and connection, reliable process, easy production and manufacturing, and does not rely on special heat dissipation media such as deionized coolant, system-level heat dissipation air ducts and special heat dissipation devices, etc.

[0045] In the technical solution of this embodiment, a power module is provided, which includes a housing 20 made of sheet metal for external use, an insulating component 30 arranged in the middle, an electrical module 10 with a disk-shaped thyristor as the core inside, a first heat dissipation structure 50, and each copper busbar. The potential of the housing 20 is equivalent to that of the ground, and the second heat dissipation structures 12 at both ends of the internal electrical module 10 are all at high voltages. The electrical module 10 can be divided into a bus P level, a bus N level, an AC R level, an AC S level, and an AC T level respectively according to different internal topological connections. The second heat dissipation structures 12 at both ends of the electrical module 10 can be profile radiators, fin radiators, or heat pipe radiators. The insulating component 30 in the middle plays the roles of insulation, isolation, and fixation for the internal electrical module 10 and the external sheet metal housing 20. The insulating component 30 and the housing 20 act together to form an air duct for the electrical module 10. The first heat dissipation structure 50 is connected to the air duct and fixed on the external sheet metal housing assembly to forcibly air-cool the electrical module 10. The connecting copper busbar components are respectively connected to the second heat dissipation structures 12 at both ends of the electrical module 10 according to the topological structure, and the bus P level, the bus N level, the AC R level, the AC S level, and the AC T level are respectively led out. This modular power module can be used alone or in series and parallel combinations of multiple levels to achieve capacity expansion. By implementing a power module described in the specific implementation manner of the present invention, this modular structure is very convenient to use in a complete set of switchgear, easy to disassemble, assemble, and maintain, saves space and volume, improves power density while realizing modular installation and maintenance, and saves material costs, production costs, and maintenance costs. At the same time, it solves the problems caused by the application structure of traditional thyristors, such as difficult installation and maintenance, serious conflict between insulation and heat dissipation, large volume, heavy weight, low modularity, difficulty in serialization and modularization, prominent safety regulations problems, and dependence on special heat dissipation methods; it can well meet the requirements of high modularity, high maintainability, and convenient power expansion in the field of modern industrial drive converters.

[0046] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0047] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A power module, characterized in that, Comprising: An electrical module (10); A housing (20), on the mounting plate body (21) of the housing (20), a first heat dissipation structure (50) is provided; An insulation assembly (30), the insulation assembly (30) includes a first insulation plate body (31) and a second insulation plate body (32), both the first insulation plate body (31) and the second insulation plate body (32) are arranged perpendicular to the mounting plate body (21), the first insulation plate body (31) and the second insulation plate body (32) are arranged perpendicular to each other, the electrical module (10) is fixedly connected to the first insulation plate body (31), and a first fluid gap (33) is provided between the electrical module (10) and the second insulation plate body (32); The electrical module (10) includes electrical components (11) and a plurality of second heat dissipation structures (12), the plurality of second heat dissipation structures (12) are arranged around the electrical components (11), a second fluid gap (13) is provided between adjacent second heat dissipation structures (12), and the port of the second fluid gap (13) faces the first heat dissipation structure (50); The second heat dissipation structure (12) is one of a profile radiator or a chip radiator; The electrical component (11) is a disk-shaped thyristor, the second heat dissipation structure (12) is a chip radiator, the second heat dissipation structure (12) has a plurality of fins, a third fluid gap is formed between adjacent fins, and part of the third fluid gap communicates with the second fluid gap.

2. The power module according to any one of claims 1, characterized in that The insulation assembly (30) includes two of the first insulation plate bodies (31) and at least two of the second insulation plate bodies (32), at least one electrical module (10) is fixedly connected to each of the first insulation plate bodies (31), and the first fluid gap (33) is provided between the electrical module (10) and each of the second insulation plate bodies (32).

3. The power module according to claim 2, wherein There are a plurality of the electrical modules (10), and each of the electrical modules (10) is arranged in sequence along the length direction of the first insulation plate body (31), the first heat dissipation structure (50) includes a plurality of fans, and each of the fans is arranged in sequence along the length direction of the first insulation plate body (31).

4. The power module according to claim 2, characterized in that, The insulation assembly (30) further includes a first insulation structure (34), the first insulation structure (34) is arranged between the electrical module (10) and the second insulation plate body (32), and the length of the first insulation structure (34) in the direction perpendicular to the mounting plate body (21) is greater than the length of the electrical module (10) in the direction perpendicular to the mounting plate body (21).

5. The power module according to claim 4, characterized in that, Both sides of the first insulation structure (34) in the length direction of the first insulation plate body (31) are provided with bending regions, and the bending regions are bent away from the first insulation plate body (31).

6. The power module according to claim 3, characterized in that A plurality of mounting holes are provided on a side of the first insulating plate body (31) away from the electrical module (10). The electrical module (10) and the first insulating plate body (31) are fixedly connected by a plurality of threaded fasteners, and each of the threaded fasteners is disposed in each of the mounting holes. A second insulating structure (35) is provided on a side of the first insulating plate body (31) away from the electrical module (10), and each of the mounting holes is located within the coverage of the second insulating structure (35).

7. The power module according to claim 6, wherein, The second insulating structure (35) is provided with bending regions on both sides in the length direction of the first insulating plate body (31), and the bending regions are bent towards the direction close to the first insulating plate body (31).

Images