Integrated multistage filter

Abstract

The utility model relates to an integrated multistage filter which comprises a support assembly, a filtering combination plate, a copper bar assembly and a magnetic ring assembly. A mounting table is arranged on the support assembly, the filtering combination plate comprises a filtering plate and a capacitor bank, and one side, away from the filtering plate, of the capacitor bank is in contact with the mounting table through a glue layer; the magnetic ring assembly comprises a first magnetic ring and two second magnetic rings, and the filtering combination plates and the second magnetic rings are arranged in turn; the copper bar assembly sequentially penetrates through the two second magnetic rings and is provided with a welding point, and the welding point is welded to the two filtering combination plates. Compared with the prior art, the two independent filtering combination plates are adopted, and the filtering combination plates are welded with the copper bar pins, so that compared with the traditional connection, the number of the pins is obviously reduced, the connection is convenient and fast, and the stability is high; three stages of magnetic rings and two filtering combination plates are integrated, so that the multi-stage filtering function is realized; and the filtering combination plate is mounted on the bracket assembly in an inverted manner, so that the longitudinal space is effectively utilized, and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filter especially a kind of integrated multistage filter. BACKGROUND

[0002] With the development of new energy vehicles, the performance, driving experience and internal space of vehicle have more stringent standards, which promotes new energy vehicles to develop in the direction of high integration, high performance and light weight. As the core component of electric drive assembly, motor controller integrates filter components, film capacitors, power components and current sensors and other key components. The cooperation between these components has a decisive influence on the integration level of the whole motor controller.

[0003] As a key component, the integration of the current filter component needs to be improved. The connection between filter capacitor and copper bar mainly relies on manual pin welding. This method not only consumes manpower, but also cannot guarantee the consistency of products, increases the risk of product failure. In addition, the introduction of multistage filter structure increases the number of pin welding, which not only increases the labor cost, but also increases the risk, which is not conducive to large-scale production. The dispersed layout of each filter capacitor leads to insufficient space utilization, which increases the volume of the component and is not conducive to integrated design.

[0004] In summary, how to design a filter with high integration, filter capacitor and copper bar convenient for connection is a technical problem to be solved. CONTENT OF UTILITY MODEL

[0005] The utility model aims at overcoming the defects of low integration or inconvenient production in the prior art and provides an integrated multistage filter.

[0006] The purpose of the utility model can be realized by the following technical solutions.

[0007] According to one aspect of the utility model, an integrated multistage filter is provided, which comprises a support assembly, two filter combination plates, a copper bar assembly and a magnetic ring assembly mounted on the support assembly. The support assembly is provided with a mounting table. The filter combination plate comprises a filter plate and a capacitor group mounted on the filter plate. The side of the capacitor group away from the filter plate is in contact with the mounting table. The magnetic ring assembly comprises a first magnetic ring and two second magnetic rings. The filter combination plate and the second magnetic ring are arranged alternately. The copper bar assembly passes through the two second magnetic rings in turn. The copper bar assembly is provided with a welding point, and the welding point is welded with the two filter combination plates.

[0008] As a preferred technical solution, the bracket assembly includes two filter areas for mounting the filter combination board, a copper busbar area for mounting the copper busbar assembly, and three magnetic ring areas for mounting the magnetic ring assembly. One of the filter areas is located between the two magnetic ring areas, and the copper busbar area passes through the filter area and the magnetic ring area.

[0009] As a preferred technical solution, the mounting platform is located in the filtering area, and an adhesive layer is provided on the mounting platform, which is in contact with the capacitor bank.

[0010] As a preferred technical solution, the mounting platform is provided with a groove.

[0011] As a preferred technical solution, the magnetic ring region includes a first magnetic ring region and a second magnetic ring region. The first magnetic ring region is provided with a groove, the first magnetic ring is filled into the groove, and the second magnetic ring is installed in the second magnetic ring region.

[0012] As a preferred technical solution, the copper busbar assembly includes a positive copper busbar and a negative copper busbar, the copper busbar area is provided with a partition, the positive copper busbar and the negative copper busbar are respectively installed on one side of the partition, and the partition is provided with a limiting post.

[0013] As a preferred technical solution, the bracket assembly includes a side plate, and the side plate has a limiting post and a wire harness binding ring on its surface away from the copper busbar assembly.

[0014] As a preferred technical solution, the bracket assembly is provided with a positioning post, and the copper busbar assembly is provided with a positioning hole, and the positioning post cooperates with the positioning hole.

[0015] As a preferred technical solution, the pins of the capacitor bank are soldered to a filter board; the filter board is provided with multiple mounting holes and grounding holes, the filter assembly is mounted on the bracket assembly through the mounting holes, and the filter board is grounded through the grounding holes.

[0016] As a preferred technical solution, the capacitor group includes an X capacitor and two Y capacitor groups, with the X capacitor located on one side of the filter plate and the two Y capacitor groups located on the other side of the filter plate; each Y capacitor group includes a first Y capacitor and a second Y capacitor arranged adjacent to each other.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) This utility model uses two independent filter combination boards, which are welded to the copper busbar pins. Compared with the traditional connection, the number of pins is significantly reduced, the connection is convenient, materials are saved, and the stability is high. Within a limited space, three-stage magnetic rings and two filter combination boards are integrated, which has the function of multi-stage filtering and can achieve better EMC performance. The capacitor bank is in contact with the mounting platform, that is, the filter combination board and the capacitor bank are mounted on the bracket assembly in an inverted manner, which effectively utilizes the longitudinal space for arrangement, making the overall structure more compact. At the same time, it also shortens the welding distance and pin length between the filter combination board and the copper busbar assembly, ensuring the firmness and reliability of the connection.

[0019] 2) The mounting platform of this utility model is provided with an adhesive layer, which not only enhances the stability of the connection, but also has the function of vibration reduction and buffering; the mounting platform is also provided with a groove, which can increase the contact area with the adhesive layer and improve the firmness of the connection.

[0020] 3) The positioning posts on the bracket assembly of this utility model cooperate with the positioning holes on the copper busbar assembly to prevent errors and limit positioning, thereby reducing assembly mistakes; the bracket assembly is equipped with limiting posts and wire harness binding rings to facilitate the arrangement and fixation of the wire harness when the filter is subsequently connected to the discharge resistor.

[0021] 4) The filter combination board of this utility model has multiple grounding holes, which can be directly connected to the box for grounding. The multi-point grounding design optimizes the grounding path of the capacitor bank and further ensures EMC performance. The two filter combination boards adopt the same layout design, realizing design sharing. They can avoid distinguishing them during assembly, effectively reducing costs and shortening assembly time. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an integrated multi-stage filter according to the present invention;

[0023] Figure 2 This is an exploded view of an integrated multi-stage filter according to the present invention.

[0024] Figure 3 This is a schematic diagram of the support assembly structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the filter combination board structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the copper busbar assembly structure of this utility model;

[0027] The numbers in the diagram are as follows:

[0028] 1. Bracket assembly; 11. Filtering area; 111. Mounting platform; 1111. Groove; 12. Copper busbar area; 121. Partition; 13. Magnetic ring area; 131. First magnetic ring area; 1311. Slot; 132. Second magnetic ring area; 14. Side plate; 15. Limiting post; 16. Wire harness binding ring; 17. Positioning post; 2. Filter combination plate; 21. Filter plate; 211. Mounting hole; 212. Grounding hole; 22. Capacitor group; 221. X capacitor; 222. Y capacitor group; 2221. First Y capacitor; 2222. Second Y capacitor; 3. Copper busbar assembly; 31. Welding point; 32. Positioning hole; 4. Magnetic ring assembly; 41. First magnetic ring; 42. Second magnetic ring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0030] like Figure 1 As shown, this utility model provides an integrated multi-stage filter, including a support assembly 1, a filter combination board 2, a copper busbar assembly 3, and a magnetic ring assembly 4. This utility model integrates three-stage magnetic rings and multiple pairs of filter capacitors, possessing multi-stage filtering functionality and achieving good EMC performance.

[0031] like Figure 3 As shown, the support assembly 1 includes two filter areas 11, a copper busbar area 12, and three magnetic ring areas 13. The magnetic ring area 13 includes a first magnetic ring area 131 and a second magnetic ring area 132. The support assembly 1 is arranged from one side to the other with the second magnetic ring area 132, the filter area 11, the second magnetic ring area 132, the filter area 11, and the first magnetic ring area 131 in sequence. The copper busbar area 12 passes through the filter area 11 and the magnetic ring area 13.

[0032] The filter assembly board 2 is installed within the filter area 11. The filter area 11 has a mounting platform 111. The mounting platform 111 has grooves 1111 on its surface and an adhesive layer. The grooves 1111 allow for a tighter connection between the adhesive layer and the mounting platform 111. The adhesive layer contacts the capacitor bank 22 of the filter assembly board 2. This means the filter assembly board 2 is installed in an inverted manner on the support assembly 1, effectively utilizing the longitudinal arrangement space, resulting in a more compact overall structure. It also shortens the soldering distance and pin length between the assembly board and the copper busbar, ensuring a strong and reliable connection. The adhesive layer ensures a certain amount of adhesive application, providing vibration damping and cushioning protection.

[0033] The copper busbar assembly 3 is installed in the copper busbar area 12. The copper busbar area 12 is divided into two parts by a partition 121, which houses the positive and negative copper busbars of the copper busbar assembly 3. A limiting post 15 is also provided on the partition 121. A positioning post 17 is also provided in the copper busbar area 12. The positioning post 17 cooperates with the positioning hole 32 of the copper busbar assembly 3 to prevent errors and limit positioning, reducing assembly mistakes.

[0034] The bracket assembly 1 is also provided with a side plate 14, and a limiting post 15 is provided on the side plate 14. A wire harness binding ring 16 is also provided on the outer side of the side plate 14. The limiting post 15 and the wire harness binding ring 16 can facilitate the subsequent installation of the discharge resistor and the routing of the wire harness.

[0035] The first magnetic ring area 131 is provided with a slot 1311, and the first magnetic ring 41 is encapsulated in the slot 1311, which can simplify the subsequent assembly process. The two second magnetic rings 42 are respectively installed in one second magnetic ring area 132.

[0036] like Figure 4 As shown, the filter assembly board 2 includes a filter board 21 and a capacitor bank 22. The filter board 21 has multiple mounting holes 211 and grounding holes 212. The filter assembly board 2 is mounted on the bracket assembly 1 through the mounting holes 211, and grounded by fixing it to the enclosure through the grounding holes 212. This multi-point grounding design optimizes the grounding path of the filter capacitors, further ensuring EMC performance. The capacitor bank 22 includes an X capacitor 221 and two Y capacitor banks 222. The X capacitor 221 is located on one side of the filter board 21, and the two Y capacitor banks 222 are located on the other side. Each Y capacitor bank 222 includes a first Y capacitor 2221 and a second Y capacitor 2222 arranged adjacent to each other. The leads of each capacitor in the capacitor bank 22 are wave soldered to the filter board 21. Two independent filter combination boards 2 are used, with capacitors integrated on them. Wave soldering technology is employed to solder the filter combination boards 2 to the copper busbar leads, significantly reducing the number of leads compared to traditional connections. This not only saves material costs but also enhances the stability of the copper busbar forming process. The two filter combination boards 2 use identical layout designs, achieving design standardization and eliminating the need for differentiation during assembly, effectively reducing costs and shortening assembly time.

[0037] like Figure 5 As shown, the copper busbar assembly 3 includes a positive copper busbar and a negative copper busbar. Both the positive and negative copper busbars are provided with welding points 31 and positioning holes 32. The positive and negative copper busbars are welded to the two filter combination boards 2 through the welding points 31 by wave soldering. The positioning holes 32 are used for the installation and positioning of the copper busbar assembly 3.

[0038] like Figure 2As shown, the magnetic ring assembly 4 includes a first magnetic ring 41 and two second magnetic rings 42, both of which are installed inside the bracket assembly 1. The copper busbar assembly 3 passes through the two second magnetic rings 42 in sequence, but does not pass through the first magnetic ring 41. The first magnetic ring 41 is located on the outside of one end of the copper busbar assembly 3.

[0039] During installation, the first magnetic ring 41 is first encapsulated in the slot 1311, and the capacitor group 22 is welded to the filter plate 21. Next, the copper busbar assembly 3 passes through the two second magnetic rings 42, and the position is adjusted so that the positioning post 17 and the positioning hole 32 are engaged. The two second magnetic rings 42 and the copper busbar assembly 3 are then installed on the bracket assembly 1. After that, an adhesive layer is applied to the mounting platform 111, the filter assembly 2 is installed on the bracket assembly 1, the capacitor group 22 is bonded to the adhesive layer, and the copper busbar assembly 3 passes through the filter assembly 2. Finally, the copper busbar leads are welded to the filter assembly 2 using wave soldering.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An integrated multi-stage filter, characterized in that, The system includes a support assembly (1) and two filter combination plates (2), a copper busbar assembly (3), and a magnetic ring assembly (4) mounted on the support assembly (1). The support assembly (1) is provided with a mounting platform (111). The filter combination plate (2) includes a filter plate (21) and a capacitor bank (22) mounted on the filter plate (21). The side of the capacitor bank (22) away from the filter plate (21) is in contact with the mounting platform (111). The magnetic ring assembly (4) includes a first magnetic ring (41) and two second magnetic rings (42). The filter combination plate (2) and the second magnetic rings (42) are arranged alternately. The copper busbar assembly (3) passes through the two second magnetic rings (42) in sequence. The copper busbar assembly (3) is provided with a welding point (31), which is welded to the two filter combination plates (2).

2. The integrated multi-stage filter according to claim 1, characterized in that, The bracket assembly (1) includes two filter areas (11) for mounting the filter combination plate (2), a copper busbar area (12) for mounting the copper busbar assembly (3), and three magnetic ring areas (13) for mounting the magnetic ring assembly (4). One of the filter areas (11) is located between the two magnetic ring areas (13), and the copper busbar area (12) passes through the filter area (11) and the magnetic ring area (13).

3. An integrated multi-stage filter according to claim 2, characterized in that, The mounting platform (111) is located in the filter area (11), and an adhesive layer is provided on the mounting platform (111), which is in contact with the capacitor bank (22).

4. An integrated multi-stage filter according to claim 1 or 3, characterized in that, The mounting platform (111) is provided with a groove (1111).

5. An integrated multi-stage filter according to claim 2, characterized in that, The magnetic ring area (13) includes a first magnetic ring area (131) and a second magnetic ring area (132). The first magnetic ring area (131) is provided with a slot (1311). The first magnetic ring (41) is filled in the slot (1311). The second magnetic ring (42) is installed in the second magnetic ring area (132).

6. An integrated multi-stage filter according to claim 2, characterized in that, The copper busbar assembly (3) includes a positive copper busbar and a negative copper busbar. The copper busbar area (12) is provided with a partition (121). The positive copper busbar and the negative copper busbar are respectively installed on one side of the partition (121). The partition (121) is provided with a limiting post (15).

7. An integrated multi-stage filter according to claim 1, characterized in that, The bracket assembly (1) includes a side plate (14), on the surface of the side plate (14) away from the copper busbar assembly (3) a limiting post (15) and a wire harness binding ring (16).

8. An integrated multi-stage filter according to claim 1, characterized in that, The bracket assembly (1) is provided with a positioning post (17), and the copper busbar assembly (3) is provided with a positioning hole (32). The positioning post (17) cooperates with the positioning hole (32).

9. An integrated multi-stage filter according to claim 1, characterized in that, The pins of the capacitor bank (22) are soldered onto the filter board (21); the filter board (21) is provided with a plurality of mounting holes (211) and grounding holes (212); the filter combination board (2) is mounted on the bracket assembly (1) through the mounting holes (211); and the filter board (21) is grounded through the grounding holes (212).

10. An integrated multi-stage filter according to claim 9, characterized in that, The capacitor group (22) includes an X capacitor (221) and two Y capacitor groups (222). The X capacitor (221) is located on one side of the filter plate (21), and the two Y capacitor groups (222) are located on the other side of the filter plate (21). Each Y capacitor group (222) includes a first Y capacitor (2221) and a second Y capacitor (2222) arranged adjacent to each other.

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