Power module structure and power supply

Abstract

This utility model provides a power module structure and a power supply. The power module structure includes a transformer, a first printed circuit board, a second printed circuit board, a first group of power devices, a second group of power devices, and output terminals. The first output pin of the secondary side of the transformer is connected to the first printed circuit board, and the second output pin of the secondary side of the transformer is connected to the second printed circuit board. The output terminals are connected to both the first and second printed circuit boards. The first group of power devices is fixed to the first printed circuit board, and the second group of power devices is fixed to the second printed circuit board, having the same number and type of components. The secondary side of the transformer is electrically connected to the input terminals of both the first and second groups of power devices. The output terminals of the first group of power devices are electrically connected to the output terminals, and the input terminals of the second group of power devices are electrically connected to the output terminals. The power module structure and power supply provided by this utility model embodiment improve heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of electronic device technology, specifically to a power module structure and a power supply. Background Technology

[0002] With the continuous development of artificial intelligence technology, the demand for computing power is growing rapidly, requiring continuous transformation and upgrading of data centers, and placing increasingly higher demands on server power supply systems and heat dissipation.

[0003] In existing technologies, server power supplies suffer from low heat dissipation efficiency, which can lead to transformer overheating during prolonged operation and affect their normal use. To accelerate heat dissipation, fans are typically installed on server power supplies. However, for some high-power, high-current servers, adding fans still does not achieve the desired effect. Therefore, developing a server power supply with superior heat dissipation capabilities has become a crucial issue that urgently needs to be addressed by those skilled in the art. Utility Model Content

[0004] To address the problems in the prior art, this utility model provides a power module structure and power supply, which can at least partially solve the problems existing in the prior art.

[0005] On one hand, this utility model proposes a power module structure, including a transformer, a first printed circuit board, a second printed circuit board, a first group of power devices, a second group of power devices, and output terminals, wherein:

[0006] The first output pin of the secondary side of the transformer is connected to the first printed circuit board, the second output pin of the secondary side of the transformer is connected to the second printed circuit board, and the output terminals are respectively connected to the first printed circuit board and the second printed circuit board.

[0007] The first group of power devices is fixed to the first printed circuit board, and the second group of power devices is fixed to the second printed circuit board; the component data and component types included in the first group of power components are the same as the number and component types included in the second group of power components;

[0008] The secondary side of the transformer is electrically connected to the input terminals of the first group of power devices and the second group of power devices, respectively. The output terminal of the first group of power devices is electrically connected to the output terminal, and the input terminal of the second group of power devices is electrically connected to the output terminal.

[0009] Furthermore, the first printed circuit board and the second printed circuit board are arranged in parallel.

[0010] Furthermore, the first group of power devices and the second group of power devices each include at least one of the following components: a first output capacitor, a second output capacitor, an output inductor, and an output rectifier switch.

[0011] Furthermore, the output rectifier switch is a metal-oxide-semiconductor field-effect transistor or a diode.

[0012] Furthermore, the first output capacitor is used for filtering, and the second output capacitor is used for energy storage.

[0013] Furthermore, the power module structure provided in this embodiment of the present invention also includes an input inductor and an input capacitor, the input inductor and the input capacitor being disposed on the first printed circuit board or the second printed circuit board; the input capacitor is connected to the input inductor, and the input inductor is connected to the primary side of the transformer.

[0014] Furthermore, the input capacitor is a thin-film capacitor or a ceramic capacitor.

[0015] Furthermore, the power module structure provided in this embodiment of the present invention also includes an output current detection unit, which is disposed on the first printed circuit board or the second printed circuit board; the output current detection unit is used to detect the secondary output current of the transformer.

[0016] Furthermore, the transformer has 3 sets, with each set of transformers corresponding to the first set of power devices and the second set of power devices.

[0017] On the other hand, this utility model proposes a power supply, including the power module structure described in any of the above embodiments.

[0018] The power module structure and power supply provided in this embodiment include a transformer, a first printed circuit board, a second printed circuit board, a first group of power devices, a second group of power devices, and output terminals. The first output pin of the secondary side of the transformer is connected to the first printed circuit board, and the second output pin of the secondary side of the transformer is connected to the second printed circuit board. The output terminals are connected to both the first and second printed circuit boards. The first group of power devices is fixed to the first printed circuit board, and the second group of power devices is fixed to the second printed circuit board. The component data and types included in the first group of power devices are the same as the number and types of components included in the second group of power devices. The secondary side of the transformer is electrically connected to the input terminals of the first group of power devices and the second group of power devices. The output terminals of the first group of power devices are electrically connected to the output terminals, and the input terminals of the second group of power devices are electrically connected to the output terminals. The power supply current is output through the first and second printed circuit boards, which reduces the current flowing through the printed circuit boards while increasing the heat dissipation area and improving the heat dissipation performance of the power module structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0020] Figure 1 This is a heat dissipation diagram of a power module in the prior art provided by the first embodiment of this utility model.

[0021] Figure 2 This is a heat dissipation diagram of the power module structure provided in the second embodiment of this application.

[0022] Figure 3A This is a three-dimensional structural diagram of the power module structure provided in the third embodiment of this utility model.

[0023] Figure 3B This is a first side view of the power module structure provided in the third embodiment of this utility model.

[0024] Figure 3C This is a second side view of the power module structure provided in the third embodiment of this utility model.

[0025] Figure 3D This is a front view structural diagram of the power module structure provided in the third embodiment of this utility model.

[0026] Figure 3E This is a bottom view of the power module structure provided in the third embodiment of this utility model.

[0027] Figure 4 This is a circuit structure diagram of the power module structure provided in the fourth embodiment of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Transformer; 2. First printed circuit board;

[0030] 3. Second printed circuit board; 4. Output terminals;

[0031] 5. First output capacitor; 6. Second output capacitor;

[0032] 7. Output inductor; 8. Output rectifier switch;

[0033] 9. Input inductor; 10. Input capacitor;

[0034] 11. Output current detection unit. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of this utility model and their descriptions are used to explain this utility model, but are not intended to limit this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0036] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0037] To facilitate understanding of the technical solution provided in this application, the relevant content of the technical solution in this application will be explained below.

[0038] With the development of power supply technology, modular power supplies have been widely adopted in the power supply industry due to their advantages such as plug-and-play capability, convenient assembly, and easy replacement. Modular power supplies can be power systems composed of individual modules, including EMC (Electromagnetic Compatibility), AC / DC (Alternating Current / Direct Current), and DC / DC (Direct Current / Direct Current) modules, or individual functional modules, generally referred to as AC / DC modular power supplies or DC / DC modular power supplies. The advantages of modular power supplies are standardization, compatible design, plug-and-play flexibility, and the ability to connect modules in series or parallel to meet different power and voltage requirements.

[0039] Figure 1 This is a heat dissipation diagram of a power module in the prior art provided by the first embodiment of this utility model, as shown below. Figure 1 As shown, the fan is located on one side of the power module, and the airflow is from left to right. Since the power semiconductor devices (hereinafter referred to as power devices) are all concentrated on a PCB (Printed Circuit Board), the PCB generates a lot of heat. The airflow mainly flows on the top and bottom sides of the PCB to dissipate heat from the PCB.

[0040] Figure 2 This is a heat dissipation schematic diagram of the power module structure of this application provided in the second embodiment of the present invention, as shown below. Figure 2 As shown, the fan is located on one side of the power module, with airflow from left to right. Due to the presence of a first printed circuit board (PCB1) and a second printed circuit board (PCB2), and because PCB1 and PCB2 respectively carry some power devices on the secondary output side of the transformer, the current flowing through PCB1 and PCB2 is relatively... Figure 1 The current flowing through the middle PCB is small, and the airflow can flow on the upper and lower sides of PCB1 and PCB2 respectively. This reduces the current flowing through the printed circuit board while increasing the heat dissipation area, thereby improving the heat dissipation effect of the power module structure.

[0041] The power module structure provided in this embodiment of the invention is compatible with high-power, low-voltage, high-current power modules for Artificial Intelligence (AI) / server power supplies. For example, it can be an external 760VDC power module with a rated current of several hundred amps.

[0042] Figure 3A This is a three-dimensional structural diagram of the power module structure provided in the third embodiment of this utility model. Figure 3BThis is a first side view of the power module structure provided in the third embodiment of this utility model. Figure 3C This is a second side view of the power module structure provided in the third embodiment of this utility model. Figure 3D This is a front view schematic diagram of the power module structure provided in the third embodiment of this utility model. Figure 3E This is a bottom view of the power module structure provided in the third embodiment of this utility model, as shown in the diagram. Figure 3A , Figure 3B , Figure 3C , Figure 3D and Figure 3E As shown, the power module structure provided in this embodiment of the present invention includes a transformer 1, a first printed circuit board 2, a second printed circuit board 3, a first group of power devices, a second group of power devices, and an output terminal 4, wherein:

[0043] The first output pin of the secondary side of transformer 1 is connected to the first printed circuit board 2, the second output pin of the secondary side of transformer 1 is connected to the second printed circuit board 3, and the output terminal 4 is connected to the first printed circuit board 2 and the second printed circuit board 3 respectively.

[0044] The first group of power devices is fixed to the first printed circuit board 2, and the second group of power devices is fixed to the second printed circuit board 3; the component data and component types included in the first group of power components are the same as the number and component types included in the second group of power components;

[0045] The secondary side of transformer 1 is electrically connected to the input terminals of the first group of power devices and the second group of power devices, respectively. The output terminal of the first group of power devices is electrically connected to the output terminal 4, and the input terminal of the second group of power devices is electrically connected to the output terminal 4.

[0046] Specifically, transformer 1 is located between the first printed circuit board 2 and the second printed circuit board 3. The first printed circuit board 2 is electrically connected to transformer 1 through a first lead on the secondary side of transformer 1. The first lead on the secondary side of transformer 1 can be fixed to the first printed circuit board 2, for example, by soldering or plugging. The second printed circuit board 3 is electrically connected to transformer 1 through a second lead on the secondary side of transformer 1. The second lead on the secondary side of transformer 1 can be fixed to the second printed circuit board 3, for example, by soldering or plugging.

[0047] The power devices connected to the secondary side of transformer 1 are distributed across the first printed circuit board 2 and the second printed circuit board 3. For example, the power devices connected to the secondary side of transformer 1 are evenly distributed across the first printed circuit board 2 and the second printed circuit board 3, thereby dispersing the heat generated by the power devices connected to the secondary side of transformer 1 across the two printed circuit boards, which is beneficial for heat dissipation. The power devices set on the first printed circuit board 2 are the first group of power devices, and the power devices set on the second printed circuit board 3 are the second group of power devices. The first group of power devices may include devices such as a first output capacitor, a second output capacitor, an output inductor, and an output rectifier switch, and the configuration is set according to actual needs. This embodiment of the present invention does not limit the configuration. The second group of power devices may include devices such as a first output capacitor, a second output capacitor, an output inductor, and an output rectifier switch, and the configuration is set according to actual needs. This embodiment of the present invention does not limit the configuration.

[0048] The secondary side of transformer 1 is electrically connected to the input terminals of the first group of power devices and the second group of power devices, respectively. The output terminal of the first group of power devices is electrically connected to output terminal 4, and the input terminal of the second group of power devices is electrically connected to output terminal 4. The output current of the secondary side of transformer 1 passes through the first group of power devices and the second group of power devices, and is then combined to output terminal 4 to provide the power supply current. This reduces the current flowing through the printed circuit board and disperses heat across the two printed circuit boards for heat dissipation. The first end of output terminal 4 can be fixed to the first printed circuit board 2 by means of plugging or other methods, and the second end of output terminal 4 can be fixed to the second printed circuit board 3 by means of plugging or other methods.

[0049] The first group of power devices includes the same number of components as the second group of power devices, and the types of components in the first group of power devices are the same as those in the second group of power devices. By setting the number of components in the first group of power devices to be the same as that in the second group of power devices, the heat generated by the first group of power devices and the second group of power devices can be distributed as evenly as possible on the first printed circuit board 2 and the second printed circuit board 3, which helps to improve the heat dissipation efficiency of the printed circuit boards.

[0050] For example, the first group of power devices and the second group of power devices include the same number of first output capacitors, second output capacitors, output inductors and output rectifier switches.

[0051] The power module structure provided in this embodiment includes a transformer, a first printed circuit board, a second printed circuit board, a first group of power devices, a second group of power devices, and output terminals. The first output pin of the secondary side of the transformer is connected to the first printed circuit board, and the second output pin of the secondary side of the transformer is connected to the second printed circuit board. The output terminals are connected to both the first and second printed circuit boards. The first group of power devices is fixed to the first printed circuit board, and the second group of power devices is fixed to the second printed circuit board. The component data and types included in the first group of power devices are the same as the number and types of components included in the second group of power devices. The secondary side of the transformer is electrically connected to the input terminals of the first group of power devices and the second group of power devices. The output terminals of the first group of power devices are electrically connected to the output terminals, and the input terminals of the second group of power devices are electrically connected to the output terminals. Power supply current is output through the first and second printed circuit boards, which reduces the current flowing through the printed circuit boards while increasing the heat dissipation area, thus improving the heat dissipation performance of the power module structure.

[0052] Based on the above embodiments, the first printed circuit board 2 and the second printed circuit board 3 are further arranged in parallel. The airflow direction generated by the fan used for heat dissipation of the power module structure is the same as the parallel direction of the first printed circuit board 2 and the second printed circuit board 3, which is beneficial for the airflow to remove the heat from the first printed circuit board 2 and the second printed circuit board 3.

[0053] like Figure 3A , Figure 3B , Figure 3C and Figure 3E As shown, based on the above embodiments, the first group of power devices and the second group of power devices further include at least one of the following components: a first output capacitor 5, a second output capacitor 6, an output inductor 7, and an output rectifier switch 8.

[0054] Specifically, the first output capacitor 5 is used for filtering and smoothing the voltage; it can be a ceramic capacitor. The second output capacitor 6 is larger than the first output capacitor 5. It is used for energy storage and instantaneous current compensation, reducing voltage fluctuations caused by sudden load changes; it can be an electrolytic capacitor. The output inductor 7 is used for filtering and smoothing the current; it can form a filter circuit with the first output capacitor 5. The output rectifier switch 8 is used for rectification and can be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) switch or a diode device.

[0055] Based on the above embodiments, the output rectifier switch 8 further adopts a MOSFET switch or a diode.

[0056] Building upon the above embodiments, the first output capacitor 5 is further used for filtering to smooth the voltage. The second output capacitor 6 is used for energy storage to reduce voltage fluctuations caused by sudden load changes.

[0057] like Figure 3A , Figure 3B and Figure 3C As shown, based on the above embodiments, the power module structure provided by this utility model embodiment further includes an input inductor 9 and an input capacitor 10, which are disposed on the first printed circuit board 2 or the second printed circuit board 3; the input capacitor 10 is connected to the input inductor 9, and the input inductor 9 is connected to the primary side of the transformer 1.

[0058] Specifically, the input inductor 9 and the input capacitor 10 can be soldered onto the first printed circuit board 2. Correspondingly, the primary output terminal of the transformer 1 is soldered onto the first printed circuit board 2, and the input inductor 9 is electrically connected to the transformer 1 through the primary output terminal of the transformer 1; or, the input inductor 9 and the input capacitor 10 can be soldered onto the second printed circuit board 3. Correspondingly, the primary output terminal of the transformer 1 is soldered onto the second printed circuit board 3, and the input inductor 9 is electrically connected to the transformer 1 through the primary output terminal of the transformer 1.

[0059] The input inductor 9 and the input capacitor 10 can form an LC resonant circuit, which can be used to implement soft switching. The specific number of input inductors 9 and input capacitors 10 can be selected according to actual needs, and this embodiment of the invention does not limit the number of inductors 9 and 10.

[0060] Based on the above embodiments, the input capacitor 10 is further adopted as a thin film capacitor or a ceramic capacitor.

[0061] like Figure 3A As shown, based on the above embodiments, the power module structure provided in this embodiment further includes an output current detection unit 11, which is disposed on the first printed circuit board 2 or the second printed circuit board 3; the output current detection unit 11 is used to detect the secondary output current of the transformer 1. The output current detection unit 11 can be a resistor or a Hall current sensor.

[0062] To balance heat dissipation between the first printed circuit board 2 and the second printed circuit board 3, when the input inductor 9 and the input capacitor 10 are located on the first printed circuit board 2, the current detection unit 11 can be located on the second printed circuit board 3. Conversely, when the input inductor 9 and the input capacitor 10 are located on the second printed circuit board 3, the current detection unit 11 can be located on the first printed circuit board 2.

[0063] Based on the above embodiments, further, there are multiple sets of transformer 1, each set of transformer 1 corresponding to a first set of power devices and a second set of power devices.

[0064] like Figure 4 As shown, the power module structure includes three sets of transformers. Each set of transformers corresponds to the first set of power devices and the second set of power devices. The first set of power devices includes a first output capacitor 5-1, a second output capacitor 6-1, an output inductor 7-1, and an output rectifier switch 8-1. The second set of power devices includes a first output capacitor 5-2, a second output capacitor 6-2, an output inductor 7-2, and an output rectifier switch 8-2. Each set of transformers has corresponding first output capacitors 5-1, 5-2, 8-1, and 8-2. The three sets of transformers share the second output capacitor 6-1, output inductor 7-1, second output capacitor 6-2, and output inductor 7-2. The primary side of each set of transformers is electrically connected to the second terminal of the input inductor 9, and the first terminal of the input inductor 9 is electrically connected to the input capacitor 10. The input capacitor 10 can be connected to a power conversion switch, which is used for step-down chopping. The power conversion switch can be mounted on the same circuit board as the connected input capacitor 10, or it can be mounted on another circuit board (for example, the power conversion switch can be mounted on a third printed circuit board). The mounting can be configured according to actual needs, and this embodiment of the invention does not impose any limitations. It is understood that the power module structure may also include a grounding terminal.

[0065] The first output pin of the secondary side of each transformer is electrically connected to the first terminal of the output rectifier switch 8-1 of the first group of power devices. The second terminal of the output rectifier switch 8-1 is electrically connected to the first terminal of the first output capacitor 5-1. The second terminal of each first output capacitor 5-1 of the first group of power devices is electrically connected to the first terminal of the output inductor 7-1. The second terminal of the output inductor 7-1 is connected to the first terminal of the second output capacitor 6-1. The second terminal of the second output capacitor 6-1 is electrically connected to the output terminal 4.

[0066] The second output pin of the secondary side of each transformer is electrically connected to the first terminal of the output rectifier switch 8-2 ​​of the second group of power devices. The second terminal of the output rectifier switch 8-2 ​​is electrically connected to the first terminal of the first output capacitor 5-2. The second terminal of each first output capacitor 5-2 of the second group of power devices is electrically connected to the first terminal of the output inductor 7-2. The second terminal of the output inductor 7-2 is connected to the first terminal of the second output capacitor 6-2. The second terminal of the second output capacitor 6-2 is electrically connected to the output terminal 4.

[0067] This utility model provides a power supply, including the power module structure described in any of the above embodiments.

[0068] The power module structure provided in this embodiment of the present invention has the following advantages compared with the prior art:

[0069] (1) The power module structure is divided into upper and lower PCBs to output the power supply current, which is then summarized to the output terminal. This can reduce the current flowing through the PCB and disperse the heat dissipation of the PCB, resulting in better heat dissipation performance.

[0070] (2) The magnetic components such as transformers and resonant inductors in the power module structure are placed in the center, and the two PCB boards are raised, which is more suitable for the airflow of the heat dissipation channel.

[0071] (3) The upper and lower lead wire structure of the secondary winding of the transformer divides the current that is concentrated on one PCB in the existing technology into two PCBs, thereby reducing the current flowing through each PCB, reducing the current stress on the PCB, and making it more suitable for heat dissipation applications in high current scenarios.

[0072] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0073] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power module structure, characterized in that, It includes a transformer, a first printed circuit board, a second printed circuit board, a first group of power devices, a second group of power devices, and output terminals, wherein: The first output pin of the secondary side of the transformer is connected to the first printed circuit board, the second output pin of the secondary side of the transformer is connected to the second printed circuit board, and the output terminals are respectively connected to the first printed circuit board and the second printed circuit board. The first group of power devices is fixed to the first printed circuit board, and the second group of power devices is fixed to the second printed circuit board; the component data and component types included in the first group of power components are the same as the number and component types included in the second group of power components; The secondary side of the transformer is electrically connected to the input terminals of the first group of power devices and the second group of power devices, respectively. The output terminal of the first group of power devices is electrically connected to the output terminal, and the input terminal of the second group of power devices is electrically connected to the output terminal.

2. The power module structure according to claim 1, characterized in that, The first printed circuit board and the second printed circuit board are arranged in parallel.

3. The power module structure according to claim 1, characterized in that, The first group of power devices and the second group of power devices each include at least one of the following components: a first output capacitor, a second output capacitor, an output inductor, and an output rectifier switch.

4. The power module structure according to claim 3, characterized in that, The output rectifier switch is a metal-oxide-semiconductor field-effect transistor or a diode.

5. The power module structure according to claim 3, characterized in that, The first output capacitor is used for filtering, and the second output capacitor is used for energy storage.

6. The power module structure according to claim 1, characterized in that, It also includes an input inductor and an input capacitor, which are disposed on the first printed circuit board or the second printed circuit board; the input capacitor is connected to the input inductor, and the input inductor is connected to the primary side of the transformer.

7. The power module structure according to claim 6, characterized in that, The input capacitor is either a thin-film capacitor or a ceramic capacitor.

8. The power module structure according to claim 1, characterized in that, It also includes an output current detection unit, which is disposed on the first printed circuit board or the second printed circuit board; the output current detection unit is used to detect the secondary output current of the transformer.

9. The power module structure according to any one of claims 1 to 8, characterized in that, The transformer has multiple sets, and each set of transformers corresponds to the first set of power devices and the second set of power devices.

10. A power supply, characterized in that, Includes the power module structure as described in any one of claims 1 to 9.

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