CN218041206U - DC-DC module and auxiliary converter - Google Patents

Abstract

The utility model provides a DC-DC module and auxiliary converter, this DC-DC module includes: the heat dissipation assembly comprises a heat dissipation seat and an air duct which are connected with each other, wherein one side surface of the heat dissipation seat is a mounting surface for mounting a functional device, the other side surface of the heat dissipation seat is provided with a heat dissipation part consisting of a plurality of heat dissipation fins, the wall of the air duct is provided with an assembly opening, and the heat dissipation part extends into the air duct from the assembly opening; a support assembly; the heat dissipation structure comprises a support frame and a plurality of support columns arranged on the support frame, wherein the end parts of the support columns are connected to the mounting surface of a heat dissipation seat so as to form a mounting space between the support frame and the mounting surface; and the functional assembly comprises a plurality of functional devices, and the functional devices are all arranged in the installation space. Based on the technical scheme of the utility model, the modular structure design is progressive layer by layer, the assembly relation and the sequence are clear, and the disassembly and the assembly are convenient; the heat dissipation effect is good due to the self-provided air duct; the whole appearance of module is square, and electric interface and mechanical interface are friendly, are convenient for install, maintain.

Description

DC-DC module and auxiliary converter

Technical Field

The utility model relates to an auxiliary converter technical field especially relates to a DC-DC module and auxiliary converter.

Background

With the rapid development of the rail transit industry in China, the auxiliary converter is continuously upgraded as an important power supply unit of a train, and the original heavy converter device is gradually replaced by a small-sized high-efficiency converter. In order to achieve high performance, high efficiency and high power density of the converter, researchers achieve the aim of assisting the converter in high power density by adopting various modes such as new materials, new devices and new circuit topology combination.

In addition, the assembly structure of the auxiliary converter is also one of the improvement directions, and because the installation space on the train is limited, the auxiliary converter must consider the compactness of the structure and also consider the heat dissipation performance.

Therefore, a DC-DC module and an auxiliary converter are proposed for an assembly structure of the module, which impose compactness of the module structure on the premise of ensuring heat dissipation performance, and further reduce the volume and weight of the auxiliary converter system.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the prior art that the structure of an auxiliary converter module is compact and the heat dissipation performance is incomplete, the application provides a DC-DC module and an auxiliary converter.

In a first aspect, the present invention provides a DC-DC module, including:

the radiating assembly comprises a radiating seat and an air duct which are connected with each other, wherein one side surface of the radiating seat is a mounting surface for mounting a functional device, the other side surface of the radiating seat is provided with a radiating part consisting of a plurality of radiating fins, the wall of the air duct is provided with an assembly opening, and the radiating part extends into the air duct from the assembly opening;

a support assembly; the heat dissipation structure comprises a support frame and a plurality of support columns arranged on the support frame, wherein the end parts of the support columns are connected to the mounting surface of the heat dissipation seat, so that a mounting space is formed between the support frame and the mounting surface;

a functional assembly including a plurality of functional devices, the plurality of functional devices all being mounted in the mounting space.

In one embodiment, the air duct is a square duct with a rectangular cross section, and the mounting opening is formed in a wall of the air duct, which has a rectangular cross section and a length corresponding to the rectangular cross section.

In one embodiment, the heat dissipating fins of the heat dissipating unit are sheet-shaped, the plurality of heat dissipating fins are arranged in parallel at intervals, and heat dissipating flow channels are formed between the plurality of heat dissipating fins, and an extending direction of the heat dissipating flow channels coincides with an airflow direction in the air duct.

In one embodiment, the size of the inner space of the air duct is larger than the size of the heat dissipating portion, a wind deflector is provided on the inner wall of the air duct, and the size of the cross section of the air duct at the wind deflector, which is the airflow communication surface, is reduced to be equal to the size of the cross section of the heat dissipating portion.

In one embodiment, the plurality of pillars of the supporting component are arranged at intervals along the edge of the supporting frame, and the supporting frame, the mounting surface and the surface where the plurality of pillars are located jointly enclose the mounting space.

In one embodiment, the plurality of functional devices in the functional assembly are stacked on the mounting surface of the heat sink, and include a plurality of semiconductor power devices distributed on the mounting surface, a bus bar covering the plurality of semiconductor power devices, and a capacitor unit disposed on the bus bar.

In one embodiment, the edge of the busbar is provided with a plurality of positioning gaps, and the relative positions and the shapes and the sizes of the positioning gaps are matched with the plurality of pillars of the supporting component in a one-to-one correspondence manner;

when the busbar is installed according to a preset layout structure, the corresponding support is accommodated in the corresponding positioning notch.

In one embodiment, the capacitor unit is an integral capacitor, a plurality of fixing lugs extend from two sides of the capacitor unit, and the fixing lugs are fixedly connected with the support frame.

In one embodiment, the support frame is a concave structure with a U-shaped cross section, a capacitance cavity for accommodating the capacitor unit is formed by the support frame corresponding to the U-shaped concave portion, flanges which are turned outwards are formed on the support frame corresponding to two ends of the U-shaped concave portion, and the support column is arranged on the flanges.

In a second aspect, the present invention provides an auxiliary converter, which comprises the above DC-DC module, and further has all the technical effects of the auxiliary converter.

The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the invention can be achieved.

The utility model provides a pair of DC-DC module and auxiliary current transformer compares with prior art, possesses following beneficial effect at least:

the utility model discloses a DC-DC module and auxiliary converter develops assembly structure by the plane to three-dimensional structure, carries out the function subregion according to the circuit topology of module, then carries out the design of formula one by one according to the functional area, thereby forms the three-dimensional assembly structure who piles up and from taking the wind channel structure. The progressive modular structure design is layered, the assembly relation and the assembly sequence are clear, and the assembly error is effectively avoided; the self-provided air duct does not depend on the design of an external air duct, and has good heat dissipation effect; the whole appearance of module is square, and electric interface and mechanical interface are comparatively friendly, are convenient for install, maintain.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 shows an axial schematic view of the overall structure of the DC-DC module of the present invention;

FIG. 2 shows a schematic view of the right end face of the structure of FIG. 1;

fig. 3 is a schematic structural diagram illustrating the functional components (excluding the capacitor unit) of the DC-DC module according to the present invention mounted on the heat sink;

fig. 4 is a schematic structural diagram illustrating the mounting of the semiconductor power device of the functional component of the DC-DC module on the heat sink;

fig. 5 shows a schematic structural view of the assembly of the supporting frame of the supporting component of the DC-DC module of the present invention and the capacitor unit;

fig. 6 shows a schematic diagram of a capacitive unit of a functional component of the DC-DC module of the present invention;

fig. 7 shows a topology diagram of a circuit corresponding to the DC-DC module of the present invention.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Reference numerals:

the structure comprises a heat dissipation component 1, a heat dissipation seat 11, a heat dissipation part 111, a heat dissipation fin 112, an air duct 12, an air duct 121, an assembly opening 2, a support component 21, a support frame 211, a capacitance cavity 212, a flanging 22, a support column 3, a functional component 31, a semiconductor power device 32, a busbar 32, a positioning notch 321, a bending part 322, a capacitance unit 33, a fixing lug 331, a driving component 4, a mounting bracket 41, a driver 42, a mounting space 5 and a wind shield 6.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The embodiment of the utility model provides a DC-DC module, include:

the heat dissipation assembly 1 comprises a heat dissipation seat 11 and an air duct 12 which are connected with each other, wherein one side surface of the heat dissipation seat 11 is a mounting surface for mounting a functional device, the other side surface of the heat dissipation seat is provided with a heat dissipation part 111 consisting of a plurality of heat dissipation fins 112, the wall of the air duct 12 is provided with an assembly opening 121, and the heat dissipation part 111 extends into the air duct 12 from the assembly opening 121;

a support assembly 2; the heat dissipation structure comprises a support frame 21 and a plurality of support columns 22 arranged on the support frame 21, wherein the end parts of the support columns 22 are connected to the mounting surface of the heat dissipation seat 11, so that a mounting space 5 is formed between the support frame 21 and the mounting surface;

the functional component 3 includes a plurality of functional devices, each of which is installed in the installation space 5.

Specifically, as shown in the drawings, the DC-DC module of the present invention mainly includes three parts, namely, a heat dissipation assembly 1, a support assembly 2 and a functional assembly 3, which are stacked. The diffuser of the heat dissipation assembly 1 is equipped with the air duct 12, and the air duct 12 forms a cooling flow channel for the heat dissipation portion 111 of the heat dissipation base 11, so that the DC-DC module is provided with an air duct, a modularized air duct result is formed, and the design of the external air duct is not required. The support frame 21 of the support component 2 is arranged opposite to the heat radiation component 1, and an installation space 5 for installing the functional component 3 is formed between the support frame and the heat radiation component, so that the DC-DC module integrally forms a laminated modular design structure, and is convenient to disassemble during maintenance and installation.

In addition, the installation space 5 is supported by the pillars 22, and further the installation space 5 is surrounded by the pillars 22 to form a hollow structure, so that the heat dissipation performance is further improved, and the structure inside the functional component 3 can be visually observed.

Further, as shown in fig. 1, side structures are provided at the extending positions of the side surfaces of the air duct 12 and the heat dissipation base 11, the side structures of the air duct 12 and the heat dissipation base 11 are detachably connected to each other by fasteners, and thus the air duct 12 and the heat dissipation base 11 can be conveniently detached. After the removal, the heat dissipating portion 111 of the heat dissipating base 11 can be withdrawn from the air duct 12 through the mounting opening 121, and further, the maintenance can be performed.

In one embodiment, the air duct 12 is a square tube with a rectangular cross section, and the mounting opening 121 is opened on a tube wall corresponding to the length of the rectangular cross section of the air duct 12.

Specifically, as shown in fig. 1 and fig. 2 of the drawings, the air duct 12 is a square tube as a whole, and the cross section of the air duct is a rectangle matching with the heat dissipating portion 111 of the heat dissipating base 11, so that the design of the square tube mainly considers two aspects: firstly, each surface of the square cylinder is a plane, and the appearance of the whole module is in a square shape, so that the module is beneficial to stable connection with other structures (compared with the arc-shaped surface of the cylinder); secondly, the square cylinder can effectively reduce the overall height of the DC-DC module and improve the compactness of the structure.

In one embodiment, the heat dissipation fins 112 of the heat dissipation portion 111 are sheet-shaped, a plurality of heat dissipation fins 112 are arranged in parallel at intervals, and a heat dissipation flow channel is formed between the heat dissipation fins 112, and the extension direction of the heat dissipation flow channel is consistent with the air flow direction in the air duct 12.

Specifically, as shown in fig. 1 and fig. 3, the heat dissipation fins 112 are long strip-shaped sheet structures, a plurality of heat dissipation fins 112 are arranged in parallel, and a heat dissipation flow channel is formed at an interval between the heat dissipation fins 112, and an extending direction of the heat dissipation flow channel is the same as an airflow direction in the air duct 12, which is beneficial to rapid heat dissipation.

In one embodiment, the size of the internal space of the air duct 12 is larger than the size of the heat dissipating portion 111, a wind deflector 6 is disposed on the inner wall of the air duct 12, and the size of the cross section of the air duct 12 at the wind deflector 6, which is the airflow surface, is reduced to be equal to the size of the cross section of the heat dissipating portion 111.

Specifically, as shown in fig. 2, in consideration of the connection structure between the air duct 12 and the heat sink 11 and the fault tolerance during assembly, the heat sink 11 and the air duct 12 themselves are larger than the heat dissipation portion 111, so that a space located outside the heat dissipation portion 111 exists inside the air duct 12, and cooling air may directly flow from the space outside the heat dissipation portion 111, thereby affecting the heat dissipation effect. Therefore, the wind shield 6 is provided to forcibly guide the airflow toward the heat dissipation portion 111 to secure the heat dissipation effect. The wind deflector 6 may be provided in plurality in the air flow direction.

The wind deflector 6 may be an integral structure, that is, one wind deflector 6 can completely shield and fill the space inside the air duct 12 other than the heat dissipation portion 111, as shown in fig. 1. In addition, the wind deflector 6 may also be composed of several sub-plates, which are distributed at different positions in the airflow direction in the air duct 12, so that the projections of the several sub-plates on the cross section (perpendicular to the airflow direction) of the air duct 12 are completely shielded, and the space inside the air duct 12, which is located outside the heat dissipation portion 111, is filled.

In one embodiment, the plurality of posts 22 of the support assembly 2 are spaced along an edge of the support frame 21, and the support frame 21, the mounting surface, and a surface on which the plurality of posts 22 are located together define the mounting space 5.

Specifically, as shown in fig. 1, fig. 2 and fig. 3 of the drawings, the pillar 22 is located at an edge of the supporting frame 21, that is, the pillar 22 surrounds the installation space 5 to form an outer boundary of the installation space 5, and when the supporting function is performed, the pillar is equivalent to a shell with hollow-out peripheries of the installation space 5, so that the functional component 3 in the installation space 5 is effectively protected, and meanwhile, the hollow-out part also enables hot air formed by heat in the installation space 5 to be naturally convected with the outside to dissipate heat.

In one embodiment, the plurality of functional devices in the functional assembly 3 are stacked on the mounting surface of the heat sink 11, and include a plurality of semiconductor power devices 31 distributed on the mounting surface, a bus bar 32 covering the plurality of semiconductor power devices 31, and a capacitor unit 33 disposed on the bus bar 32.

Specifically, as shown in fig. 3 to fig. 6 of the drawings, the functional devices in the functional assembly 3 are also stacked, and mainly include a semiconductor power device 31, a bus bar 32, and a capacitor unit 33, which are stacked in sequence. Wherein, a plurality of different similar devices of the semiconductor power device 31 are distributed on the installation surface of the heat radiation seat 11; one side of the bus bar 32 has a bending portion 322, and the bending portion 322 is bent to correspond to the end of the capacitor unit 33 and is connected to the interface of the end of the capacitor unit 33.

In one embodiment, the edge of the busbar 32 has a plurality of positioning notches 321, and the relative positions and shapes and sizes of the positioning notches 321 are matched with the plurality of pillars 22 of the support assembly 2 in a one-to-one correspondence manner;

when the busbar 32 is installed according to the preset layout structure, the corresponding strut 22 is accommodated in the corresponding positioning notch 321.

Specifically, as shown in fig. 3 of the accompanying drawings, the edge of the busbar 32 is provided with a positioning notch 321 similar to a semicircle, and the positioning notch 321 is used for matching with the pillar 22 in the supporting component 2 to realize positioning and installation of the busbar 32, and also plays a role in limiting and reinforcing the installation structure of the busbar 32.

In one embodiment, the capacitor unit 33 is an integral capacitor, and a plurality of fixing lugs 331 extend from two sides of the capacitor unit 33, and the fixing lugs 331 are fixedly connected with the supporting frame 21.

Specifically, as shown in fig. 5 and fig. 6, the capacitor unit 33 is a customized integral capacitor, which is integrally formed and easy to install, but has a relatively heavy weight, and therefore, the support frame 21 is fixedly connected by the fixing lug 331 to improve the structural stability.

In one embodiment, the support frame 21 is a concave structure with a U-shaped cross section, the capacitor cavity 211 for accommodating the capacitor unit 33 is formed at the part of the support frame 21 corresponding to the U-shaped concave, the support frame 21 is formed with flanges 212 turned outwards at the positions corresponding to the two ends of the U-shape, and the pillars 22 are disposed on the flanges 212.

Specifically, as shown in fig. 2 and 5 of the drawings, the support frame 21 is a concave structure with a U-shaped cross section, so that the concave portion forms a space serving as a capacitor cavity 211 for accommodating and mounting the capacitor unit 33, the stability of the mounting structure of the capacitor unit 33 can be further improved, and in addition, the side walls on two sides of the capacitor cavity 211 can also serve as a shell for protecting the capacitor unit 33, thereby improving the external interference resistance of the whole module. In addition, flanges 212 are formed at both side wall ends of the capacitor chamber 211 for installing the support post 22, and the side walls actually serve as a part of the support function of the support post 22, thereby shortening the actual length of the support post 22 and further improving the reliability of the structure (when the support post 22 is used as a connecting member, the longer the length is, the lower the reliability is when the diameter is not changed).

Further, a driving assembly 4 is provided at a portion of the supporting bracket 21 which is a sidewall of both sides of the capacitor chamber 211, the driving assembly 4 is used for driving a corresponding function device in the function assembly 3, and the driving assembly 4 includes a mounting bracket 41 provided at an outer surface of a sidewall of the capacitor chamber 211 and a driver 42 provided on the mounting bracket 41.

An embodiment of the utility model provides an auxiliary converter, it includes foretell DC-DC module, and then possesses all technological effects that it possessed.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (10)

1. A DC-DC module, comprising:

the radiating assembly comprises a radiating seat and an air duct which are connected with each other, wherein one side surface of the radiating seat is a mounting surface for mounting a functional device, the other side surface of the radiating seat is provided with a radiating part consisting of a plurality of radiating fins, the wall of the air duct is provided with an assembly opening, and the radiating part extends into the air duct from the assembly opening;

a support assembly; the heat dissipation structure comprises a support frame and a plurality of support columns arranged on the support frame, wherein the end parts of the support columns are connected to the mounting surface of the heat dissipation seat, so that a mounting space is formed between the support frame and the mounting surface;

a functional assembly including a plurality of functional devices, the plurality of functional devices all being installed in the installation space.

2. The DC-DC module according to claim 1, wherein the air guide duct is a square duct with a rectangular cross section, and the assembling opening is formed in a wall of the duct with the rectangular cross section and the length corresponding to that of the duct.

3. The DC-DC module according to claim 1, wherein the heat dissipating fins of the heat dissipating unit are formed in a sheet shape, the plurality of heat dissipating fins are arranged in parallel at intervals to form heat dissipating flow paths therebetween, and an extending direction of the heat dissipating flow paths is aligned with an airflow direction in the air duct.

4. The DC-DC module according to claim 3, wherein the size of an inner space of the air guide duct is larger than that of the heat dissipating portion, a wind deflector is provided on an inner wall of the air guide duct, and a cross section of the air guide duct at the wind deflector, which is an airflow passage surface, is reduced to be equal to that of the heat dissipating portion.

5. The DC-DC module of claim 1, wherein the plurality of posts of the support assembly are spaced apart along an edge of the support frame, and the support frame, the mounting surface, and a surface on which the plurality of posts are located collectively define the mounting space.

6. The DC-DC module according to any one of claims 1 to 5, wherein the plurality of functional devices in the functional assembly are stacked on the mounting surface of the heat sink, and include a plurality of semiconductor power devices distributed on the mounting surface, a busbar covering the plurality of semiconductor power devices, and a capacitor unit disposed on the busbar.

7. The DC-DC module according to claim 6, wherein the edge of the busbar has a plurality of positioning notches, and the relative positions and shapes and sizes of the positioning notches are matched with the plurality of pillars of the supporting component in a one-to-one correspondence manner;

when the busbar is installed according to a preset layout structure, the corresponding support is accommodated in the corresponding positioning notch.

8. The DC-DC module of claim 6, wherein the capacitor unit is an integral capacitor, and a plurality of fixing lugs extend from two sides of the capacitor unit and are fixedly connected with the supporting frame.

9. The DC-DC module as claimed in claim 6, wherein the support frame is a U-shaped concave structure in cross section, the portion of the support frame corresponding to the U-shaped concave structure forms a capacitor chamber for accommodating the capacitor unit, the support frame is formed with flanges turned outwards at positions corresponding to two ends of the U-shaped concave structure, and the support posts are disposed on the flanges.

10. An auxiliary converter, characterized in that it comprises a DC-DC module according to any of claims 1 to 9.

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