Power modules and power supply equipment

Abstract

This invention provides a power module and power supply device. The power module includes: a circuit board; a power unit, a filter unit, and an inductor unit disposed on the circuit board; a shielding groove is provided on the outer side of the filter unit, and the shielding groove and the shielding cover cooperate to form a shielding cavity, which isolates the filter unit from other units of the power module; the power unit and the filter unit are respectively disposed on opposite sides of the circuit board, and the inductor unit is disposed between the power unit and the filter unit; the filter unit is electrically connected to the power unit and the inductor unit through the circuit board. This invention optimizes the shielding structure design of the filter unit to avoid interference from the power unit and the inductor unit to the filter unit, thereby improving the filtering effect and the EMC performance of the power module.

Description

Technical Field

[0001] This invention relates to the field of power supply PCB layout technology, and in particular to a power module and power supply device. Background Technology

[0002] With the continuous development of power supply technology, more and more scenarios require power supply modules. However, due to the limitations of the application environment, the size of power supply modules is restricted. A well-designed printed circuit board (PCB) can effectively improve the electromagnetic compatibility (EMC) performance of the power supply, as well as its operating efficiency.

[0003] In the prior art, the filtering unit of the power module is often directly set on the circuit board without a dedicated shielding structure. This makes it easy for electromagnetic interference generated by the power unit and inductor unit to enter the filtering unit, affecting the filtering effect and the EMC performance of the power module, and making it difficult to meet the requirements of high-stability power supply. Summary of the Invention

[0004] The purpose of this invention is to provide a power module and power supply device to solve the technical problems of the filter unit being susceptible to electromagnetic interference and having poor filtering effect in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a power module, comprising: a circuit board; a power unit disposed on the circuit board and electrically connected to the circuit board; a filter unit disposed on the circuit board and electrically connected to the circuit board, wherein a shielding groove is provided on the outer side of the filter unit; a shielding cover cooperating with the shielding groove to form a shielding cavity, the shielding cavity being used to isolate the filter unit from other units of the power module; and an inductor unit disposed on the circuit board and electrically connected to the circuit board, wherein the inductor unit is electrically connected between the power unit and the filter unit.

[0006] In one possible implementation, the power unit is located on the first side of the circuit board, and the filter unit is located on the second side of the circuit board, with the first and second sides being opposite sides of the circuit board. The inductor unit is located in the area between the power unit and the filter unit. By placing the power unit and the filter unit on opposite sides of the circuit board, and centrally positioning the inductor unit, the electrical connection path can be shortened, and interference can be further isolated through the shielding cavity, preventing electromagnetic interference generated by the power unit during operation from affecting the filtering effect of the filter unit.

[0007] In one possible implementation, the filtering unit includes an input filtering unit and an output filtering unit. The shielding groove includes a first shielding groove corresponding to the input filtering unit and a second shielding groove corresponding to the output filtering unit. The shielding cover includes a first shielding cover that mates with the first shielding groove and a second shielding cover that mates with the second shielding groove. The input filtering unit is used to filter out noise in the input power supply, and the output filtering unit is used to filter out noise in the power module's output power supply. The separate shielding grooves and shielding covers allow for targeted isolation between the input and output filtering units, further enhancing anti-interference capabilities.

[0008] In one possible implementation, the circuit board includes a first board and a second board. The input filter unit, the three-phase rectifier converter in the power unit, and the input inductor unit in the inductor unit are all disposed on the first board, while the output filter unit, the DC / DC isolation converter in the power unit, and the output inductor unit are all disposed on the second board. By disposing the input-side related units and the output-side related units on two separate boards, mutual interference between the input and output sides can be avoided. Combined with the shielding structure of the filter unit, this further optimizes the EMC performance of the power module.

[0009] In one possible implementation, a first shielding groove is disposed on the outside of the input filter unit on the first substrate, cooperating with the first shielding cover to form an input filter shielding cavity; a second shielding groove is disposed on the outside of the output filter unit on the second substrate, cooperating with the second shielding cover to form an output filter shielding cavity. The input filter shielding cavity can isolate the interference from the three-phase rectifier converter unit and the input inductor unit to the input filter unit, and the output filter shielding cavity can isolate the interference from the DC / DC isolation converter unit and the output inductor unit to the output filter unit, ensuring stable operation of the filter unit.

[0010] In one possible implementation, the input filter unit, the input inductor unit, and the three-phase rectifier unit are sequentially arranged along the first side to the second side of the first substrate, and all are electrically connected to the first substrate. This layout can shorten the electrical connection path between the units on the input side, reduce signal loss, and at the same time keep the input filter unit away from the power unit, further reducing interference in conjunction with the shielding cavity.

[0011] In one possible implementation, the DC / DC isolation converter unit, the output inductor unit, and the output filter unit are sequentially arranged along the first side to the second side of the second substrate, and all are electrically connected to the second substrate. This layout can shorten the electrical connection path between the units on the output side, reduce signal loss, and at the same time keep the output filter unit away from the power unit, further reducing interference in conjunction with the shielding cavity.

[0012] In one possible implementation, the first substrate and the second substrate are arranged parallel to each other and spaced apart. The three-phase rectifier converter on the first substrate and the DC / DC isolation converter on the second substrate are electrically connected by a plug-in connection. The parallel arrangement of the first and second substrates can reduce the overall size of the power module, and the plug-in connection method can ensure the stability and reliability of the electrical connection between the two substrates, while also facilitating assembly and maintenance.

[0013] In one possible implementation, the power unit includes a heat sink and a switching transistor mounted on the heat sink. The switching transistor is electrically connected to the circuit board, and forms an electrical connection loop with the inductor unit and the filter unit through the circuit board. The switching transistor is the core component of the power unit and generates a large amount of heat during operation. The heat sink effectively dissipates heat, ensuring stable operation of the switching transistor. The switching transistor, inductor unit, and filter unit form a complete loop, and the shielding structure of the filter unit improves the stability and anti-interference capability of the loop.

[0014] Secondly, embodiments of the present invention provide a power supply device, including any of the power modules described in the first aspect above. This power supply device possesses the same technical effects as the aforementioned power modules, namely, strong anti-interference capability, good filtering effect, and excellent EMC performance, making it suitable for various scenarios with high power stability requirements.

[0015] Specifically, the power module of this invention, by providing a shielding groove on the outside of the filter unit, which cooperates with the shielding cover to form a shielding cavity, effectively isolates the filter unit from other units of the power module (such as the power unit and the inductor unit). This prevents electromagnetic interference generated by other units during operation from affecting the filtering effect of the filter unit, thereby improving the EMC performance and operational stability of the power module. Simultaneously, by placing the power unit and the filter unit on opposite sides of the circuit board, with the inductor unit centrally located, the electrical connection path is shortened, reducing signal loss. Furthermore, the input and output filter units each have independent shielding structures, further enhancing the targeted anti-interference capabilities. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a power module provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of another power module provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of another power module structure provided in an embodiment of the present invention;

[0020] Figure 4 This is a top view of the fourth type of power module provided in this embodiment of the invention;

[0021] Figure 5 This is a top view of the fifth type of power module provided in this embodiment of the invention;

[0022] Figure 6 This is a schematic diagram of the sixth type of power module provided in the embodiments of the present invention;

[0023] Figure 7 This is a schematic diagram of the circuit structure of a power module provided in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of a DC / DC isolation converter unit provided in an embodiment of the present invention;

[0025] Figure 9 This is a top view of the first substrate provided in an embodiment of the present invention;

[0026] Figure 10 This is a top view of the second substrate provided in an embodiment of the present invention. Detailed Implementation

[0027] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0028] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0029] The implementation of the present invention will be described in detail below with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of a power module provided in an embodiment of the present invention. (Refer to...) Figure 1The power module includes a circuit board 10, a power unit 20, a filter unit, a shield (not shown), and an inductor unit. The power unit 20, the filter unit, and the inductor unit are all disposed on the circuit board 10 and electrically connected to the circuit board 10. The inductor unit is electrically connected between the power unit 20 and the filter unit. The filter unit has a shielding groove on its outer side. The shield and the shielding groove are connected to form a shielding cavity. The shielding cavity is used to isolate the filter unit from other units of the power module (power unit 20 and inductor unit).

[0031] Optionally, the circuit board 10 can be a printed circuit board (PCB), which has good electrical insulation and conductivity properties, and can realize electrical connection between various units. The power unit 20 can be a three-phase rectifier converter unit, DC / DC isolation converter unit, etc., used to realize the conversion of electrical energy, and its specific structure can be set according to actual needs.

[0032] The filtering unit is used to filter out noise in the power supply and ensure the stability of the output power supply. It can include an input filtering unit and an output filtering unit, corresponding to the input side and output side of the power supply, respectively. The shielding groove can be integrally formed on the circuit board 10 and is arranged around the filtering unit. Its size is adapted to the filtering unit to ensure that after the shielding cover and the shielding groove are fitted, the filtering unit can be completely wrapped in the shielding cavity to achieve effective isolation.

[0033] The inductor unit is used to store and convert electrical energy. It is electrically connected between the power unit 20 and the filter unit, and can filter out high-frequency noise in the circuit. At the same time, it works with the filter unit to further optimize the power quality. The specific model and specifications of the inductor unit can be selected according to the power requirements of the power module.

[0034] In this embodiment, the filtering unit is isolated from other units by the shielding cavity, which can effectively prevent the electromagnetic interference generated by the power unit 20 and the inductor unit during operation from affecting the filtering effect of the filtering unit and improve the EMC performance of the power module. At the same time, the inductor unit is centrally located, which shortens the electrical connection path between it and the power unit 20 and the filtering unit, reduces signal loss, and improves the working efficiency of the power module.

[0035] Figure 6 This is a schematic diagram of the sixth type of power module provided in the embodiments of the present invention, as shown below. Figure 6 As shown, in some embodiments of this application, the power unit 20 is disposed on the first side of the circuit board 10, and the filter unit is disposed on the second side of the circuit board 10. The first side and the second side are opposite sides of the circuit board 10, and the inductor unit is disposed in the area between the power unit 20 and the filter unit. This layout allows the power unit 20 and the filter unit to be as far apart as possible, further reducing interference with the shielding cavity. At the same time, the inductor unit is centrally located, which can accommodate electrical connections with both units and shorten the connection path.

[0036] In some embodiments of this application, the filtering unit includes an input filtering unit and an output filtering unit. The shielding groove includes a first shielding groove corresponding to the input filtering unit and a second shielding groove corresponding to the output filtering unit. The shielding cover includes a first shielding cover that mates with the first shielding groove and a second shielding cover that mates with the second shielding groove. The input filtering unit is used to filter out noise in the input power supply, and the output filtering unit is used to filter out noise in the output power supply. Each unit has an independent shielding structure, which can specifically isolate interference from different sources and improve the filtering effect.

[0037] Furthermore, the circuit board 10 includes a first board and a second board. The input filtering unit, the three-phase rectifier converter in the power unit 20, and the input inductor in the inductor unit are all disposed on the first board, while the output filtering unit, the DC / DC isolation converter in the power unit 20, and the output inductor in the inductor unit are all disposed on the second board. By disposing of the relevant units on the input and output sides on two independent boards, mutual interference between the input and output sides can be avoided, further optimizing the performance of the power module.

[0038] The first shielding groove is located on the outside of the input filter unit on the first substrate, and cooperates with the first shielding cover to form an input filter shielding cavity; the second shielding groove is located on the outside of the output filter unit on the second substrate, and cooperates with the second shielding cover to form an output filter shielding cavity. The input filter shielding cavity can isolate the interference from the three-phase rectifier converter unit and the input inductor unit to the input filter unit, and the output filter shielding cavity can isolate the interference from the DC / DC isolation converter unit and the output inductor unit to the output filter unit, ensuring the stable operation of the filter unit.

[0039] Along the first side to the second side of the first substrate, an input filter unit, an input inductor unit, and a three-phase rectifier unit are sequentially arranged and all electrically connected to the first substrate. This layout shortens the electrical connection path between the units on the input side, reduces signal loss, and simultaneously keeps the input filter unit away from the power unit 20, further reducing interference in conjunction with the input filter shielding cavity. For example, Figure 9 This is a top view of the first substrate provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the input filter unit is located on one side of the first substrate, the input inductor unit is located between the input filter unit and the three-phase rectifier conversion unit, the three-phase rectifier conversion unit is located on the other side of the first substrate, and the outer side of the input filter unit is provided with a first shielding groove, which can cooperate with the first shielding cover to form an input filter shielding cavity.

[0040] Along the first to the second side of the second substrate, a DC / DC isolation converter unit, an output inductor unit, and an output filter unit are sequentially arranged and all electrically connected to the second substrate. This layout shortens the electrical connection path between the units on the output side, reduces signal loss, and simultaneously keeps the output filter unit away from the power unit 20, further reducing interference in conjunction with the output filter shielding cavity. For example, Figure 10 This is a top view of the second substrate provided in an embodiment of the present invention, as shown below. Figure 10 As shown, the DC / DC isolation converter unit is located on one side of the second substrate, the output inductor unit is located between the DC / DC isolation converter unit and the output filter unit, the output filter unit is located on the other side of the second substrate, and the outer side of the output filter unit is provided with a second shielding groove, which can cooperate with the second shielding cover to form an output filter shielding cavity.

[0041] In some embodiments of this application, the first substrate and the second substrate are arranged parallel to each other and spaced apart. The three-phase rectifier converter on the first substrate and the DC / DC isolation converter on the second substrate are electrically connected by a plug-in connection. The parallel arrangement of the first and second substrates can reduce the overall size of the power module, making assembly and maintenance easier; the plug-in connection method can ensure the stability and reliability of the electrical connection between the two substrates and avoid failures caused by poor contact.

[0042] In some embodiments of this application, the power unit 20 includes a heat sink S and a switching transistor Q mounted on the heat sink S. The switching transistor Q is electrically connected to the circuit board 10, and forms an electrical connection loop with the inductor unit and the filter unit through the circuit board 10. The switching transistor Q is the core component of the power unit 20, and it generates a large amount of heat during operation. Mounting the heat sink S can effectively dissipate heat, ensuring stable operation of the switching transistor Q and extending its service life. The switching transistor Q forms a complete electrical connection loop with the inductor unit and the filter unit. Combined with the shielding structure of the filter unit, the stability and anti-interference capability of the loop can be improved.

[0043] For example, Figure 4 This is a top view structural diagram of the fourth type of power module provided in the embodiments of the present invention, as shown below. Figure 4 As shown, the power unit 20 (three-phase rectifier conversion unit) includes an A-phase switch tube unit, a B-phase switch tube unit, and a C-phase switch tube unit. Each switch tube unit includes eight switch tubes Q and two heat sinks S. The switch tubes Q are attached to the heat sinks S, which not only ensures the heat dissipation effect but also makes the overall layout of the power unit 20 symmetrical, further improving stability.

[0044] Figure 5 This is a top view schematic diagram of the fifth type of power module provided in the embodiment of the present invention, as shown below. Figure 5As shown, the power unit 20 (DC / DC isolation converter unit) includes two resonant converter units connected in parallel. Each resonant converter unit includes six switching transistors Q and four heat sinks S. The switching transistors Q are attached to the heat sinks S to ensure balanced heat dissipation and make the overall layout of the power unit 20 symmetrical, thereby improving the stability of operation.

[0045] Figure 7 This is a circuit structure diagram of a power module provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the power module includes an AC power conversion section and a DC power conversion section. The AC power conversion section includes an input filter unit, an input inductor unit, and a three-phase rectifier unit. The DC power conversion section includes a DC / DC isolation converter unit, an output inductor unit, and an output filter unit. The input filter unit, input inductor unit, and three-phase rectifier unit are located on the first substrate, while the output filter unit, output inductor unit, and DC / DC isolation converter unit are located on the second substrate. The first substrate and the second substrate are electrically connected via a connector.

[0046] The input filter unit has a first shielding groove on its outer side, which, together with the first shielding cover, forms an input filter shielding cavity to isolate the interference from the three-phase rectifier converter unit and the input inductor unit to the input filter unit. The output filter unit has a second shielding groove on its outer side, which, together with the second shielding cover, forms an output filter shielding cavity to isolate the interference from the DC / DC isolation converter unit and the output inductor unit to the output filter unit, ensuring the filtering effect and improving the EMC performance of the power module.

[0047] Figure 8 This is a schematic diagram of the structure of a DC / DC isolation converter unit provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the DC / DC isolation converter unit includes four resonant converters connected in parallel. Each resonant converter includes multiple switching transistors Q. The four resonant converters have the same circuit structure and are all electrically connected to the output inductor unit and the output filter unit. The second shielding groove on the outside of the output filter unit cooperates with the second shielding cover to effectively isolate the electromagnetic interference generated when the resonant converter is working, ensuring the stable operation of the output filter unit.

[0048] In this embodiment, the shielding structure design of the filter unit can effectively isolate electromagnetic interference from other units and improve the filtering effect; the layout of the power unit 20 and the filter unit is coordinated to shorten the electrical connection path and reduce signal loss; the separate substrates on the input and output sides further avoid mutual interference. The technical solution specifically addresses the pain points of the prior art and has significant technical advantages.

[0049] This application also provides a power supply device, including the power module as described in any of the above embodiments. This power supply device possesses the same technical effects as the power module described above, namely, strong anti-interference capability, good filtering effect, and excellent EMC performance, and can be applied to various scenarios with high power stability requirements, such as industrial control, communication equipment, and medical equipment.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power module, characterized in that, include: Circuit board; A power unit is disposed on the circuit board and electrically connected to the circuit board. A filter unit is disposed on the circuit board and electrically connected to the circuit board, and a shielding groove is provided on the outer side of the filter unit; A shielding cover, which mates with the shielding groove, forms a shielding cavity, which is used to isolate the filtering unit from other units of the power module. An inductor unit is disposed on the circuit board and electrically connected to the circuit board, and the inductor unit is electrically connected between the power unit and the filter unit.

2. The power module as described in claim 1, characterized in that, The power unit is disposed on the first side of the circuit board, the filter unit is disposed on the second side of the circuit board, the first side and the second side are opposite sides of the circuit board, and the inductor unit is disposed in the area between the power unit and the filter unit.

3. The power module as described in claim 1, characterized in that, The filtering unit includes an input filtering unit and an output filtering unit. The shielding groove includes a first shielding groove corresponding to the input filtering unit and a second shielding groove corresponding to the output filtering unit. The shielding cover includes a first shielding cover that mates with the first shielding groove and a second shielding cover that mates with the second shielding groove.

4. The power module as described in claim 3, characterized in that, The circuit board includes a first board and a second board. The input filtering unit, the three-phase rectifier converter in the power unit, and the input inductor in the inductor unit are all disposed on the first board. The output filtering unit, the DC / DC isolation converter in the power unit, and the output inductor in the inductor unit are all disposed on the second board.

5. The power module as described in claim 4, characterized in that, The first shielding groove is disposed on the outside of the input filter unit on the first substrate, and cooperates with the first shielding cover to form an input filter shielding cavity; the second shielding groove is disposed on the outside of the output filter unit on the second substrate, and cooperates with the second shielding cover to form an output filter shielding cavity.

6. The power module as described in claim 4, characterized in that, Along the first side to the second side of the first substrate, the input filter unit, the input inductor unit, and the three-phase rectifier conversion unit are arranged in sequence, and all are electrically connected to the first substrate.

7. The power module as described in claim 4, characterized in that, Along the first side to the second side of the second substrate, the DC / DC isolation converter unit, the output inductor unit, and the output filter unit are arranged in sequence and are all electrically connected to the second substrate.

8. The power module as described in claim 4, characterized in that, The first substrate and the second substrate are arranged in parallel and spaced apart. The three-phase rectifier converter on the first substrate and the DC / DC isolation converter on the second substrate are electrically connected by a plug-in connection.

9. The power module as described in claim 1, characterized in that, The power unit includes a heat sink and a switching transistor mounted on the heat sink. The switching transistor is electrically connected to the circuit board, and the switching transistor forms an electrical connection loop with the inductor unit and the filter unit through the circuit board.

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

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