Air-cooled direct-current power supply module

Abstract

The utility model relates to the field of power supply modules, and discloses an air-cooled direct-current power supply module, which comprises a shell, an anode copper bar, a cathode copper bar, a high-frequency transformer, a radiator, a capacitor module and a fan, the high-frequency transformer is arranged between the positive electrode copper bar and the negative electrode copper bar in a crossing mode, the four corners of the high-frequency transformer are fixed to the shell through insulation columns, the radiator is installed on the shell opposite to the high-frequency transformer, the two capacitor modules are connected to the positive electrode copper bar and the negative electrode copper bar through the rectifier bridge and the IGBT module respectively, and the two capacitor modules are communicated with each other. The fan is mounted on the shell on one side, far away from the radiator, of the capacitor module, and the air outlet direction of the fan is positioned between the positive copper bar and the negative copper bar. By arranging the positive copper bar and the negative copper bar, an air channel can flow out between the positive copper bar and the negative copper bar, so that the heat dissipation efficiency of the fan can be improved.

Description

Technical Field

[0001] The utility model relates to the field of power modules, in particular to an air-cooled direct current power module. Background Art

[0002] The structural layout of the power module directly affects the size, heat dissipation effect, component life and safety of the power module. The location layout of the IGBT module, capacitor, rectifier bridge and other electrical appliances in the existing power module is mainly stacked according to their respective volumes. In order to ensure the heat dissipation effect, the power module needs either a very large chassis or more heat dissipation equipment, which increases the investment cost of the power module. For devices with small space, smaller power modules can adapt. Utility Model Content

[0003] The utility model aims to solve the problems in the background technology and provide an air-cooled DC power supply module.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A wind-cooled DC power supply module comprises a shell, a positive copper bar, a negative copper bar, a high-frequency transformer, a radiator, a capacitor module and a fan, wherein the positive copper bar and the negative copper bar are parallel and staggeredly installed in the shell, the high-frequency transformer is located in the middle of the shell, the high-frequency transformer is arranged across the positive copper bar and the negative copper bar, the four corners of the high-frequency transformer are fixed to the shell through insulating columns, the radiator is installed on the shell opposite to the high-frequency transformer, the two capacitor modules are respectively connected to the positive copper bar and the negative copper bar through a rectifier bridge and an IGBT module, and the two capacitor modules are connected to each other, the fan is installed on the shell on the side of the capacitor module away from the radiator, and the air outlet direction of the fan is located between the positive copper bar and the negative copper bar.

[0006] The fans are provided with three groups, and a controller is installed on the outer shell of one side of the fans.

[0007] The positive copper bar and the negative copper bar are respectively provided with connection terminals passing through the shell, the connection terminal of the positive copper bar is provided with an inductor, and the connection terminal of the negative copper bar is connected with a Hall sensor.

[0008] It also includes a three-phase full-bridge rectifier, which is connected to a high-frequency transformer.

[0009] The air-cooled DC power supply module provided by the utility model has the following beneficial effects:

[0010] (1) By arranging the positive copper bar and the negative copper bar installed in parallel and staggered, an air duct can flow out between the positive copper bar and the negative copper bar. The high-frequency transformer and the radiator are symmetrically installed on both sides of the positive copper bar and the negative copper bar, so that the main heat source of the power module can be connected with the air duct, which can improve the heat dissipation efficiency of the fan. At the same time, this layout structure is arranged according to the function of each component and the heat dissipation channel, making the layout more compact, greatly improving the space utilization, and making the power module smaller in size;

[0011] (2) By providing two interconnected capacitor modules, the capacitor modules can be prevented from blocking the central air duct, thereby ensuring the heat dissipation effect of the power module and effectively reducing the failure rate of components;

[0012] (3) By setting up a three-phase full-bridge rectifier, the power conversion efficiency is not affected by the conduction angle of the rectifier device within the entire load range. In addition, the heat sink and the good heat dissipation design channel minimize the radiation of the whole machine. It also reduces the occupied space and volume, and reduces the product weight and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic structural diagram of an embodiment of the present utility model is provided.

[0015] Figure 2 A top view of the structure provided for an embodiment of the utility model.

[0016] Figure 3 The front view provided for the embodiment of the utility model.

[0017] Figure numerals: 1. Shell; 2. Positive copper busbar; 3. Negative copper busbar; 4. High-frequency transformer; 5. Radiator; 6. Capacitor module; 7. Fan; 8. Insulation column; 9. Rectifier bridge; 10. IGBT module; 11. Inductor; 12. Hall sensor; 13. Controller; 14. Three-phase full-bridge rectifier. DETAILED DESCRIPTION

[0018] Example

[0019] like Figure 1 to Figure 3As shown, the air-cooled DC power supply module provided in this embodiment includes a shell 1, a positive copper bar 2, a negative copper bar 3, a high-frequency transformer 4, a radiator 5, a capacitor module 6 and a fan 7. The positive copper bar 2 and the negative copper bar 3 are parallel and staggeredly installed in the shell 1. The positive copper bar 2 and the negative copper bar 3 are arranged in parallel to ensure that their spacing is consistent, and the staggered arrangement is, on the one hand, to adapt to the installation of components, and on the other hand, to provide a channel for air flow in the middle, which can improve the heat dissipation efficiency. The high-frequency transformer 4 is located in the middle of the shell 1, and the high-frequency transformer 4 is arranged across the positive copper bar 2 and the negative copper bar 3. The four corners of the high-frequency transformer 4 are fixed to the shell 1 through insulating columns 8. Through the insulating columns 8, there can be a space between the high-frequency transformer 4 and the shell 1 for air to flow, so as to ensure the heat dissipation effect. The radiator 5 is installed On the housing 1 opposite to the high-frequency transformer 4, the radiator 5 and the high-frequency transformer 4 are symmetrically arranged along the positive copper bar 2, which can save space in the housing 1 and enclose a heat dissipation channel. This not only makes the structure of the power module more compact, but also achieves the best heat dissipation effect. The two capacitor modules 6 are respectively connected to the positive copper bar 2 and the negative copper bar 3 through the rectifier bridge 9 and the IGBT module 10, and the two capacitor modules 6 are interconnected to effectively avoid the space of the air duct. The fan 7 is installed on the housing 1 on the side of the capacitor module 6 away from the radiator 5, and the air outlet direction of the fan 7 is located between the positive copper bar 2 and the negative copper bar 3. There are three groups of fans 7, and the three groups of fans 7 are arranged side by side. A controller 13 is installed on the housing 1 on one side of the fan 7, and a display panel for displaying various data of the power module is processed on the controller 13.

[0020] In order to detect the working status of the power module, the positive copper bus 2 and the negative copper bus 3 are respectively installed with wiring terminals passing through the shell 1, the wiring terminal of the positive copper bus 2 is installed with an inductor 11, and the wiring terminal of the negative copper bus 3 is connected with a Hall sensor 12. The inductor 11 and the Hall sensor 12 are both connected to the controller 13 to facilitate understanding of the working status of the power module.

[0021] It also includes a three-phase full-bridge rectifier 14, which is connected to the high-frequency transformer 4. The rectifier device is fully turned on during the rectification process. In the entire load range, the conversion efficiency of the power supply is not affected by the conduction angle of the rectifier device. In addition, the heat sink 5 and the good heat dissipation design channel, high-quality devices and process level minimize the radiation of the whole machine. It also reduces the occupied space and volume, and reduces the product weight and cost.

[0022] In addition, the structural routing of the entire power module disclosed in this patent not only has short lines, but also effectively reduces the impact of the lines on components, thereby extending the service life of the power module.

[0023] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any modification and replacement based on the technical solution and the utility model concept provided by the present invention shall be included in the protection scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present invention omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the present invention.

Claims

1. An air-cooled DC power supply module, characterized in that: The invention comprises a housing (1), a positive copper bar (2), a negative copper bar (3), a high-frequency transformer (4), a radiator (5), a capacitor module (6) and a fan (7); the positive copper bar (2) and the negative copper bar (3) are arranged in parallel and staggered in the housing (1); the high-frequency transformer (4) is located in the middle of the housing (1); the high-frequency transformer (4) is arranged across the positive copper bar (2) and the negative copper bar (3); the four corners of the high-frequency transformer (4) are fixed to the housing (1) by insulating columns (8). The heat sink (5) is mounted on a housing (1) opposite to the high-frequency transformer (4); the two capacitor modules (6) are respectively connected to the positive copper bar (2) and the negative copper bar (3) through a rectifier bridge (9) and an IGBT module (10), and the two capacitor modules (6) are interconnected; the fan (7) is mounted on the housing (1) on a side of the capacitor module (6) away from the heat sink (5), and the air outlet direction of the fan (7) is located between the positive copper bar (2) and the negative copper bar (3).

2. The air-cooled DC power supply module according to claim 1, characterized in that: The fans (7) are provided in three groups, and a controller (13) is installed on the housing (1) on one side of the fans (7).

3. The air-cooled DC power supply module according to claim 2, characterized in that: The positive copper bar (2) and the negative copper bar (3) are respectively provided with connection terminals passing through the housing (1); an inductor (11) is installed on the connection terminal of the positive copper bar (2); and a Hall sensor (12) is connected to the connection terminal of the negative copper bar (3).

4. The air-cooled DC power supply module according to claim 1, characterized in that: It also includes a three-phase full-bridge rectifier (14), which is connected to the high-frequency transformer (4).

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