filter

Abstract

The present disclosure provides a filter, and relates to the technical field of power systems. The filter comprises an external terminal, a magnetic ring, a conductive row, a grounding piece and a shielding shell. The external terminal comprises an external end and a connecting end. The magnetic ring is formed with an accommodation space, the external terminal is located in the accommodation space, and the external end and the connecting end are located on both sides in the axial direction of the magnetic ring. One end of the conductive row is connected with the connecting end of the external terminal. The grounding piece is connected with the conductive row. The shielding shell is formed with a shielding space, the external terminal, the magnetic ring, the conductive row and the grounding piece are arranged in the shielding space, and the external end of the external terminal is located outside the shielding shell. The other end of the conductive row is exposed from the shielding shell. The filter provided by the present disclosure improves the electromagnetic interference suppression capability.

Description

Technical Field

[0001] This disclosure relates to the field of power system technology, and more specifically, to a filter. Background Technology

[0002] In the fields of photovoltaic power generation and electrochemical energy storage, photovoltaic modules and electrochemical energy storage battery packs generate direct current (DC). However, modern power grid systems mainly rely on alternating current (AC) for transmission, and inverters can efficiently convert DC to AC. Therefore, in order to achieve grid-connected power generation for photovoltaic or electrochemical energy storage power plants, DC must be converted to AC by an inverter.

[0003] With the rapid development of the industry, inverters must not generate electromagnetic noise exceeding certain limits during operation. Therefore, the requirements for the EMC (Electromagnetic Compatibility) performance of inverters are becoming increasingly stringent. Typically, inverters use filters to suppress EMI (Electromagnetic Interference), thus the requirements for the EMI suppression capability of inverters are also becoming increasingly stringent.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this disclosure is to provide a filter that improves the ability to suppress electromagnetic interference.

[0006] According to one aspect of this disclosure, a filter is provided, the filter comprising: An external terminal, wherein the external terminal includes an external end and a connection end; A magnetic ring having a receiving space, an external terminal located in the receiving space, and the external terminal and the connecting terminal located on opposite sides of the magnetic ring along its axial direction; A conductive bus, one end of which is connected to the connection end of the external terminal; A grounding component, which is connected to the conductive busbar; A shielding housing has a shielding space, in which the external terminal, the magnetic ring, the conductive busbar and the grounding member are disposed. The external end of the external terminal is located outside the shielding housing, and the other end of the conductive busbar protrudes from the shielding housing.

[0007] In one exemplary embodiment of this disclosure, the shielding housing completely shields the magnetic ring in a direction perpendicular to the axial direction of the magnetic ring.

[0008] In one exemplary embodiment of this disclosure, the shielding housing includes a first housing and a second housing, the first housing and the second housing being fastened together to form the shielding space; the first housing forms a receiving groove, the opening of the receiving groove facing the axial direction of the magnetic ring, and the magnetic ring being located within the receiving groove.

[0009] In one exemplary embodiment of this disclosure, the filter further includes: Mounting bracket, the mounting bracket is located in the shielded space, the conductive busbar is assembled on the mounting bracket and is limitedly connected to the mounting bracket.

[0010] In one exemplary embodiment of this disclosure, the conductive bar and the mounting bracket are an integrally molded insert structure.

[0011] In one exemplary embodiment of this disclosure, the mounting bracket is provided with an annular assembly groove, and the magnetic ring is assembled in the annular assembly groove.

[0012] In one exemplary embodiment of this disclosure, the mounting bracket is provided with a mounting groove, and the external terminal is located in the mounting groove for limiting connection with the mounting bracket.

[0013] In one exemplary embodiment of this disclosure, the mounting bracket is provided with a limiting groove, and the grounding member is located in the limiting groove to limit its assembly on the mounting bracket.

[0014] In one exemplary embodiment of this disclosure, the filter further includes: The Y-capacitor is connected to the busbar via the grounding component.

[0015] In one exemplary embodiment of this disclosure, the mounting bracket is provided with a first mounting slot, and the Y capacitor is located in the first mounting slot for limiting its assembly on the mounting bracket.

[0016] In one exemplary embodiment of this disclosure, the filter further includes: A conductive element is provided, through which the Y capacitor is connected to the conductive busbar; the conductive element is mounted on the mounting frame and is limitedly connected to the mounting frame.

[0017] In one exemplary embodiment of this disclosure, the conductive element and the mounting bracket are an integrally molded insert structure.

[0018] In one exemplary embodiment of this disclosure, the filter further includes: An X-capacitor is connected to two adjacent conductive bars; the mounting frame is provided with a second mounting slot, and the X-capacitor is located in the second mounting slot for positioning and mounting on the mounting frame.

[0019] The filter disclosed herein has external terminals housed within a magnetic ring, with the external end and the connection end of the external terminals located on opposite sides of the magnetic ring's axial direction. When electromagnetic noise propagates along the external terminals, the magnetic ring generates significant impedance to the noise signal, thereby suppressing noise propagation. More importantly, because the external terminals penetrate the magnetic ring's containment space, the magnetic ring can be positioned as close as possible to the external ends, significantly shortening the distance between the external ends and the magnetic ring. This close-range arrangement effectively prevents electromagnetic noise from diffracting around the magnetic ring and directly reaching the port, ensuring that electromagnetic noise propagated through the external terminals is effectively filtered by the magnetic ring, significantly improving the filter's EMI suppression capability. Furthermore, by housing the external terminals, magnetic ring, conductive busbar, and grounding component within a shielded housing, with only the external end of the external terminals located outside the shielded housing and the other end of the conductive busbar exposed, the shielded space formed by the housing effectively blocks electromagnetic radiation generated by internal components from leaking outward, preventing interference with other sensitive components within the equipment. Simultaneously, it also prevents external electromagnetic interference signals from entering the shielded space and affecting the normal operation of components such as the magnetic ring.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 A schematic diagram of a filter provided in one embodiment of this disclosure.

[0023] Figure 2 This is a schematic diagram of a filter provided from another perspective, according to an embodiment of the present disclosure.

[0024] Figure 3 An exploded view of a filter provided in one embodiment of this disclosure.

[0025] Figure 4 An exploded view of a filter provided as an embodiment of this disclosure from another perspective.

[0026] Figure 5This is a schematic diagram of a filter with its second housing opened, according to one embodiment of the present disclosure.

[0027] Figure 6 This is a schematic diagram of a mounting bracket, external terminals, and magnetic ring provided for one embodiment of the present disclosure.

[0028] Figure 7 This is a schematic diagram of a mounting bracket provided in one embodiment of the present disclosure.

[0029] Figure 8 This is a schematic diagram of a first housing, magnetic ring, conductive busbar, Y capacitor, grounding element, and conductive element provided for one embodiment of the present disclosure.

[0030] Figure 9 This is a schematic diagram of another view of the mounting bracket provided in one embodiment of the present disclosure.

[0031] Figure 10 A schematic diagram of a filter provided for another embodiment of this disclosure.

[0032] Figure 11 A schematic diagram of a filter provided as another embodiment of this disclosure from another perspective.

[0033] Figure 12 A schematic diagram showing the filter with its second housing open, according to another embodiment of this disclosure.

[0034] Figure 13 A schematic diagram of a mounting bracket provided for another embodiment of this disclosure.

[0035] Figure 14 A schematic diagram of a first housing, magnetic ring, conductive busbar, Y capacitor, X capacitor, grounding element, and conductive element provided for another embodiment of this disclosure.

[0036] Figure 15 This is a schematic diagram of a mounting base equipped with multiple filters, provided as an embodiment of the present disclosure.

[0037] Figure 16 This is a schematic diagram from another perspective of a mounting base equipped with multiple filters, provided as an embodiment of the present disclosure.

[0038] Explanation of reference numerals in the attached figures: 1. Filter; 2. Mounting base; 10. External terminal; 11. External end; 12. Connection end; 20. Magnetic ring; 30. Conductive busbar; 41. Y capacitor; 42. X capacitor; 51. Grounding component; 52. Conductive component; 60. Shielding housing; 61. First housing; 610. Receiving groove; 62. Second housing; 620. Connection hole; 70. Mounting bracket; 71. Annular assembly groove; 72. Mounting groove; 73. First assembly groove; 74. Second assembly groove; 75. Limiting groove. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0040] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0041] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0042] This disclosure provides a filter 1, such as... Figures 1-14 As shown, the filter 1 includes: an external terminal 10, a magnetic ring 20, a conductive bus 30, a grounding component 51, and a shielding housing 60. The external terminal 10 includes an external end 11 and a connecting end 12. The magnetic ring 20 forms a receiving space, and the external terminal 10 is located in the receiving space, with the external end 11 and the connecting end 12 located on opposite sides of the magnetic ring 20 along its axial direction. One end of the conductive bus 30 is connected to the connecting end 12 of the external terminal 10. The grounding component 51 is connected to the conductive bus 30. The shielding housing 60 forms a shielding space, and the external terminal 10, the magnetic ring 20, the conductive bus 30, and the grounding component 51 are disposed in the shielding space. The external end 11 of the external terminal 10 is located outside the shielding housing 60, and the other end of the conductive bus 30 protrudes from the shielding housing 60.

[0043] The filter 1 provided in this disclosure has an external terminal 10 inserted inside a magnetic ring 20, with the external end 11 and the connection end 12 of the external terminal 10 located on opposite sides of the magnetic ring 20 along its axial direction. When electromagnetic noise is conducted along the external terminal 10, the magnetic ring 20 generates a large impedance to the noise signal, thereby suppressing the propagation of the noise. More importantly, since the external terminal 10 penetrates the space of the magnetic ring 20, the magnetic ring 20 can be brought as close as possible to the external end 11 (i.e., the port position), greatly shortening the distance between the external end 11 and the magnetic ring 20. This close-range arrangement effectively avoids the diffraction phenomenon where electromagnetic noise bypasses the magnetic ring 20 in space and directly reaches the port, ensuring that electromagnetic noise conducted through the external terminal 10 can be effectively filtered by the magnetic ring 20. This fundamentally solves the filtering failure problem caused by improper positioning of the magnetic ring 20 in the prior art, significantly improving the EMI suppression capability of the filter 1. Furthermore, the external terminal 10, magnetic ring 20, conductive bus 30, and grounding component 51 are all housed within the shielding housing 60, with only the external end 11 of the external terminal 10 located outside the shielding housing 60. The other end of the conductive bus 30 protrudes from the shielding housing 60. The shielding housing 60 is made of a material with excellent electromagnetic shielding performance, and the shielding space it forms can effectively block electromagnetic radiation generated by internal components from leaking outward, avoiding interference with other sensitive components inside the equipment. At the same time, it can also prevent external electromagnetic interference signals from entering the shielding space and affecting the normal operation of components such as the magnetic ring 20.

[0044] Specifically, the filter 1 includes multiple external terminals 10, multiple conductive bars 30, multiple Y capacitors 41, and at least one grounding element 51. Each external terminal 10 has an external end 11 and a connecting end 12. The magnetic ring 20 forms a receiving space, in which the multiple external terminals 10 are located, and the external end 11 and the connecting end 12 are located on both sides of the magnetic ring 20 along its axial direction. One end of each of the multiple conductive bars 30 is connected to the connecting end 12 of the multiple external terminals 10 in a one-to-one correspondence. One end of each of the multiple Y capacitors 41 is connected to the multiple conductive bars 30 in a one-to-one correspondence, and the other end of each of the multiple Y capacitors 41 is connected to the grounding element 51. The multiple external terminals 10, the magnetic ring 20, the multiple conductive bars 30, the multiple Y capacitors 41, and the at least one grounding element 51 are disposed in a shielding space, and the external ends 11 of the multiple external terminals 10 are located outside the shielding housing 60, while the other ends of the multiple conductive bars 30 are exposed from the shielding housing 60.

[0045] It is understood that the number of conductive busbars 30 in filter 1 can be even, meaning it includes at least one group of conductive busbars 30 with opposite polarities. Correspondingly, the number of external terminals 10 is the same as the number of conductive busbars 30, connected one-to-one; the number of Y capacitors 41 is the same as the number of conductive busbars 30, connected one-to-one; the number of grounding components 51 can be the same as the number of groups of conductive busbars 30 with opposite polarities, meaning the number of grounding components 51 is half the number of conductive busbars 30. For example, as... Figures 1-5As shown, the filter 1 can have four conductive busbars 30, four external terminals 10, four Y capacitors 41, and two grounding components 51. For example,... Figures 10-14 As shown, the filter 1 can have two conductive bars 30, two external terminals 10, two Y capacitors 41, and one grounding component 51. Figure 15 and Figure 16 As shown, two filters 1 with different numbers of conductive bars 30 can be simultaneously mounted on the mounting base 2 for use.

[0046] In some embodiments, the shielding housing 60 completely shields the magnetic ring 20 in a direction perpendicular to the axial direction of the magnetic ring 20. When the shielding housing 60 completely shields the magnetic ring 20 radially, the magnetic field generated by the magnetic ring 20 is confined within the shielding housing 60 and cannot radiate radially outward. Simultaneously, external electromagnetic interference signals cannot penetrate the shielding housing 60 radially to affect the magnetic ring 20. This comprehensive radial shielding further enhances the overall shielding effectiveness of the shielding housing 60, reduces electromagnetic coupling between the filter 1 and the external environment, and enables the filter 1 to maintain stable filtering performance in complex electromagnetic environments, avoiding EMC performance degradation caused by electromagnetic radiation leakage from the magnetic ring 20 or external interference. Furthermore, as a metallic structure, the shielding housing 60 can constrain the magnetic field of the magnetic ring 20, concentrating the magnetic field mainly within the shielding space inside and around the magnetic ring 20, creating a relatively independent magnetic field environment for the magnetic ring 20. By avoiding interference from external structures on the magnetic field distribution, this uniform magnetic field distribution ensures that the magnetic ring 20 uniformly and stably suppresses noise signals on the external terminals 10 that pass through its housing space. No matter where the external terminals 10 are located within the housing space of the magnetic ring 20, they can be subjected to the same intensity of magnetic field, thereby ensuring the consistency of the noise suppression effect of the filter 1 on different conductive paths.

[0047] Among them, such as Figures 3-5 As shown, the shielding housing 60 includes a first housing 61 and a second housing 62. The first housing 61 and the second housing 62 are fastened together to form a shielding space. The first housing 61 forms a receiving groove 610. The opening of the receiving groove 610 faces the axial direction of the magnetic ring 20, and the magnetic ring 20 is located in the receiving groove 610. In the direction perpendicular to the axial direction of the magnetic ring 20, the first housing 61 completely shields the magnetic ring 20, that is, the magnetic ring 20 is completely located in the receiving groove 610.

[0048] The first housing 61 has multiple through holes, and multiple external terminals 10 pass through these through holes, with the external ends 11 of the external terminals 10 located outside the through holes. The first housing 61 and the second housing 62 are detachably connected via threaded connections.

[0049] A waterproof gasket may be provided on the first housing 61 to seal the gap between the area around the through hole on the first housing 61 and the external terminal 10, thereby improving the water tightness of the filter 1. Multiple external terminals 10 can be sealed simultaneously with a single waterproof gasket, or multiple waterproof gaskets can be used for separate sealing; this disclosure does not limit this approach.

[0050] In some embodiments, such as Figure 3 and Figure 4 As shown, the filter 1 also includes a mounting bracket 70, which is located in the shielded space. Multiple conductive bars 30 are mounted on the mounting bracket 70 and are positioned and connected to it. By positioning the multiple conductive bars 30 onto the mounting bracket 70, the accuracy of their installation positions is improved. The mounting bracket 70 can be detachably connected to the first housing 61 via a threaded connection.

[0051] In this design, multiple conductive busbars 30 and mounting brackets 70 form an integrated insert injection molding structure. During the injection molding process of the mounting bracket 70, the conductive busbars 30 are pre-placed in the mold, and then molten plastic is injected. After the melt cools and solidifies, the conductive busbars 30 and mounting brackets 70 form a tightly integrated whole. This integrated structure completely eliminates the connection gap between the conductive busbars 30 and the mounting brackets 70, significantly improving the bonding strength and effectively resisting the effects of vibration, impact, and temperature changes on connection stability. Furthermore, before injection molding, the conductive busbars 30 are precisely fixed in a preset position in the mold. After injection molding, the conductive busbars 30 and mounting brackets 70 become a single unit, with their positional accuracy entirely guaranteed by the mold and unaffected by manual operation. The insert injection molding process achieves precise control of the conductive busbar position through the mold. In addition, the integrated insert injection molding structure combines the installation of the conductive busbars 30 with the molding process of the mounting brackets 70, eliminating the need for subsequent assembly steps, reducing labor costs, and simplifying the production process.

[0052] Among them, such as Figure 1 As shown, after the conductive busbar 30 is installed on the mounting bracket 70 using an insert injection molding process, one end of the conductive busbar 30 protrudes from the surface of the mounting bracket 70 to serve as an output terminal for connection. After the first housing 61 and the second housing 62 are fastened together, a notch is formed, and the portion of the conductive busbar 30 exposed on the mounting bracket 70 is located in this notch.

[0053] In some embodiments, such as Figure 6 and Figure 7As shown, the mounting bracket 70 has an annular mounting groove 71 on the side facing the external terminal 10, and the magnetic ring 20 is mounted in the annular mounting groove 71. The annular mounting groove 71 on the mounting bracket 70 is precisely matched with the outer dimensions of the magnetic ring 20. After the magnetic ring 20 is mounted in the annular mounting groove 71, its radial and axial positions can be defined. At the same time, the position design of the annular mounting groove 71 matches the installation position of the external terminal 10, ensuring that the external terminal 10 can accurately pass through the receiving space of the magnetic ring 20 and always be within the effective magnetic field range of the magnetic ring 20. The magnetic ring 20 and multiple conductive bars 30 are all positioned on the mounting bracket 70, which improves the compactness of the structure and avoids wasting installation space. In addition, the annular mounting groove 71 provides a precise assembly interface for the magnetic ring 20. During assembly, the magnetic ring 20 can be directly inserted into the annular mounting groove 71 to complete the fixation without additional adjustment and tightening steps, reducing manual operation and assembly errors.

[0054] In some embodiments, such as Figure 6 and Figure 7 As shown, the mounting bracket 70 has multiple mounting slots 72, and multiple external terminals 10 are located one-to-one in the mounting slots 72 for positioning and connection with the mounting bracket 70. By precisely matching the dimensions of the mounting slots 72 on the mounting bracket 70 with the external terminals 10, the radial and axial positions of the external terminals 10 are defined after they are inserted into the mounting slots 72, ensuring stable signal and current transmission between the filter 1 and external equipment, and avoiding electromagnetic noise leakage and equipment failure caused by connection problems. The multiple external terminals 10, magnetic ring 20, and multiple conductive busbars 30 are all positioned on the mounting bracket 70, improving the compactness of the structure and avoiding wasted installation space. In addition, the multiple mounting slots 72 provide precise assembly positions for the multiple external terminals 10. During assembly, simply inserting the external terminals 10 into the mounting slots 72 completes the fixing without additional adjustment and tightening steps, reducing manual operation and assembly errors.

[0055] Among them, such as Figure 7 As shown, the structure of the mounting groove 72 matches the shape and size of the external terminal 10 to form a limit on the external terminal 10 in multiple directions, so that the assembly position of the external terminal 10 in the mounting groove 72 is unique.

[0056] In some embodiments, such as Figure 8 and Figure 9As shown, the mounting bracket 70 has multiple first mounting slots 73, and multiple Y capacitors 41 are located one-to-one in the multiple first mounting slots 73 for positioning and assembly on the mounting bracket 70. As the core component of the filter 1 for suppressing common-mode noise, the Y capacitor 41 needs to be reliably connected at one end to the busbar 30 and at the other end to the grounding component 51. The positional accuracy of the Y capacitor 41 directly affects the reliability of these two connections. The first mounting slots 73 on the mounting bracket 70 are precisely matched to the external dimensions of the Y capacitors 41. After the multiple Y capacitors 41 are embedded one-to-one into the multiple first mounting slots 73, a positioning assembly is formed, thereby ensuring that the two ends of the Y capacitor 41 can be reliably connected to the busbar 30 and the grounding component 51 respectively. Simultaneously, the first mounting slots 73 of the Y capacitors 41 are integrated into the mounting bracket 70, forming a collaborative design with the assembly structure of the busbar 30, magnetic ring 20, and external terminal 10. This achieves a compact layout of the Y capacitors 41 and other components, improving the structural compactness and avoiding wasted installation space. In addition, the multiple first assembly slots 73 provide precise assembly positions for the multiple Y capacitors 41. During assembly, the Y capacitors 41 can be simply inserted into the first assembly slots 73 to complete the positioning assembly without additional adjustment and fastening steps, thus reducing manual operation and assembly errors.

[0057] The shape and size of the first assembly groove 73 match the shape and size of the Y capacitor 41. The upper and lower walls of the first assembly groove 73 can be provided with wire passage notches so that the connecting wires at the upper and lower ends of the Y capacitor 41 can extend out from the first assembly groove 73 to connect the conductive bus 30 and the grounding member 51.

[0058] In some embodiments, such as Figure 8 and Figure 9 As shown, the mounting bracket 70 has at least one limiting groove 75, and at least one grounding component 51 is correspondingly located in the at least one limiting groove 75 to limit its assembly on the mounting bracket 70. The grounding component 51 is the key channel for the filter 1 to conduct common-mode noise to the ground, and the stability of its grounding path directly affects the noise release efficiency. The limiting groove 75 on the mounting bracket 70 is precisely matched with the outer dimensions of the grounding component 51. After the grounding component 51 is embedded into the limiting groove 75, it is limited and assembled on the mounting bracket 70. The stable grounding path ensures that common-mode noise can be efficiently conducted to the ground, avoiding noise accumulation caused by poor grounding. At the same time, the limiting groove 75 of the grounding component 51 is integrated on the mounting bracket 70, forming a collaborative design with the assembly structure of the conductive bus 30, magnetic ring 20, external terminal 10, and Y capacitor 41, improving the compactness of the structure and avoiding waste of installation space. In addition, the limiting groove 75 provides a precise assembly position for the grounding component 51. During assembly, simply placing the grounding component 51 into the limiting groove 75 completes the positioning and assembly without additional adjustment and tightening steps, reducing manual operation and assembly errors.

[0059] When the grounding component 51 is installed in the limiting groove 75, it can be fixed to the mounting bracket 70 by means of a threaded component. The grounding component 51 can be a copper busbar.

[0060] Among them, such as Figure 2 and Figure 11 As shown, the second housing 62 is provided with a connection hole 620, and the grounding component 51 protrudes from the connection hole 620 to connect to the external contact line through the connection hole 620.

[0061] Among them, such as Figures 1-5 As shown, when the filter 1 has four external terminals 10, there are four corresponding conductive busbars 30, that is, two sets of conductive busbars 30 with opposite polarities; at this time, there are two grounding components 51, and the two grounding components 51 are simultaneously electrically connected to one set of conductive busbars 30 with opposite polarities. Figures 10-12 As shown, when the filter 1 is provided with two external terminals 10, there are two corresponding conductive bars 30, that is, there is a set of conductive bars 30 with opposite polarities; at this time, there is one grounding component 51, and the two conductive bars 30 with opposite polarities of the grounding component 51 are electrically connected.

[0062] In some embodiments, such as Figure 8 and Figure 9 As shown, the filter 1 also includes multiple conductive components 52. One end of the Y capacitor 41 is connected to the conductive bus 30 through the conductive component 52. The multiple conductive components 52 are assembled on the mounting frame 70 and are limitedly connected to the mounting frame 70. The multiple conductive components 52 are limitedly assembled on the mounting frame 70, forming a coordinated design with the assembly structure of the grounding component 51, conductive bus 30, magnetic ring 20, external terminal 10, and Y capacitor 41, which improves the compactness of the structure and avoids the waste of installation space.

[0063] In this design, multiple conductive components 52 and the mounting bracket 70 form an integrated insert injection molding structure. During the injection molding process of the mounting bracket 70, the conductive components 52 are pre-placed in the mold, and then molten plastic is injected. After the melt cools and solidifies, the conductive components 52 and the mounting bracket 70 form a tightly integrated whole. This integrated structure completely eliminates the connection gap between the conductive components 52 and the mounting bracket 70, significantly improving the bonding strength and effectively resisting the effects of vibration, impact, and temperature changes on connection stability. Furthermore, before injection molding, the conductive components 52 are precisely fixed in a preset position in the mold. After injection molding, the conductive components 52 and the mounting bracket 70 become one unit, with their positional accuracy entirely guaranteed by the mold and unaffected by manual operation. The insert injection molding process achieves precise control of the conductive component 52's position through the mold. In addition, the integrated insert injection molding structure combines the installation of the conductive components 52 with the molding process of the mounting bracket 70, eliminating the need for subsequent assembly steps, reducing labor costs, and simplifying the production process.

[0064] In this design, one end of the conductive element 52 contacts and conducts electricity with the conductive busbar 30 during the injection molding process, while the other end of the conductive element 52 protrudes from the mounting bracket 70 and is located near the corresponding Y capacitor 41, thereby connecting the Y capacitor 41 to the conductive busbar 30. The conductive element 52 and the conductive busbar 30 can be copper busbars.

[0065] In some embodiments, such as Figures 12-14 As shown, the filter 1 also includes at least one X capacitor 42, which is connected to two adjacent conductive busbars 30. The mounting bracket 70 has at least one second mounting slot 74, and each X capacitor 42 is located in one of these slots for positioning on the mounting bracket 70. The X capacitor 42, as a core component of the filter 1 for suppressing common-mode noise, requires one end to be reliably connected to the conductive busbar 30 and the other end to be reliably connected to the grounding component 51. The positional accuracy of the X capacitor 42 directly affects the reliability of these two connections. The second mounting slots 74 on the mounting bracket 70 precisely match the external dimensions of the X capacitor 42. After the X capacitors 42 are embedded into the corresponding second mounting slots 74, a positioning assembly is formed, thereby ensuring that both ends of the X capacitor 42 can be reliably connected to the conductive busbar 30 and the grounding component 51, respectively. Meanwhile, the second assembly slot 74 of the X capacitor 42 is integrated into the mounting bracket 70, forming a collaborative design with the assembly structure of the conductive busbar 30, magnetic ring 20, and external terminal 10. This achieves a compact layout of the X capacitor 42 and other components, improving the structural compactness and avoiding wasted installation space. Furthermore, multiple second assembly slots 74 provide precise assembly positions for multiple X capacitors 42. During assembly, simply inserting the X capacitor 42 into the second assembly slot 74 completes the positioning and assembly, eliminating the need for additional adjustments and tightening steps, reducing manual operation and assembly errors.

[0066] Among them, X capacitor 42 is mainly used for signal coupling and filtering applications. In DC filter 1, X capacitor 42 can effectively transmit high-frequency signals to the target circuit while filtering out low-frequency noise, ensuring signal purity and stability; its high-frequency characteristics are excellent, making it suitable for operation in high-frequency circuits. Y capacitor 41 is mainly used in power supply filter 1, serving as a power supply filter and filtering common-mode interference, absorbing high-frequency noise and eliminating electromagnetic interference.

[0067] Among them, the two ends of the X capacitor 42 are connected to the conductive parts 52 that are connected to the conductive bars 30 on both sides, that is, the X capacitor 42 is connected to the conductive bars 30 through the conductive parts 52.

[0068] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A filter, characterized in that, include: An external terminal, wherein the external terminal includes an external end and a connection end; A magnetic ring having a receiving space, an external terminal located in the receiving space, and the external terminal and the connecting terminal located on opposite sides of the magnetic ring along its axial direction; A conductive bus, one end of which is connected to the connection end of the external terminal; A grounding component, which is connected to the conductive busbar; A shielding housing has a shielding space, in which the external terminal, the magnetic ring, the conductive busbar and the grounding member are disposed. The external end of the external terminal is located outside the shielding housing, and the other end of the conductive busbar protrudes from the shielding housing.

2. The filter according to claim 1, characterized in that, In a direction perpendicular to the axial direction of the magnetic ring, the shielding housing completely covers the magnetic ring.

3. The filter according to claim 2, characterized in that, The shielding housing includes a first housing and a second housing, which are fastened together to form the shielding space; the first housing forms a receiving groove, the opening of which faces the axial direction of the magnetic ring, and the magnetic ring is located in the receiving groove.

4. The filter according to claim 1, characterized in that, The filter also includes: Mounting bracket, the mounting bracket is located in the shielded space, the conductive busbar is assembled on the mounting bracket and is limitedly connected to the mounting bracket.

5. The filter according to claim 4, characterized in that, The conductive busbar and the mounting bracket are an integrated insert injection molded structure.

6. The filter according to claim 4, characterized in that, The mounting bracket is provided with an annular assembly groove, and the magnetic ring is assembled in the annular assembly groove.

7. The filter according to claim 4, characterized in that, The mounting bracket is provided with a mounting slot, and the external terminal is located in the mounting slot for limiting connection with the mounting bracket.

8. The filter according to claim 4, characterized in that, The mounting bracket is provided with a limiting groove, and the grounding component is located in the limiting groove to be mounted on the mounting bracket for limiting.

9. The filter according to claim 4, characterized in that, The filter also includes: The Y-capacitor is connected to the busbar via the grounding component.

10. The filter according to claim 9, characterized in that, The mounting bracket is provided with a first assembly slot, and the Y capacitor is located in the first assembly slot for positioning and assembly on the mounting bracket.

11. The filter according to claim 9, characterized in that, The filter also includes: A conductive element is provided, through which the Y capacitor is connected to the conductive busbar; the conductive element is mounted on the mounting frame and is limitedly connected to the mounting frame.

12. The filter according to claim 11, characterized in that, The conductive component and the mounting bracket are an integrated insert injection molded structure.

13. The filter according to claim 4, characterized in that, The filter also includes: An X capacitor is connected to two adjacent conductive bars; the mounting frame is provided with a second mounting slot, and the X capacitor is located in the second mounting slot for positioning and mounting on the mounting frame.

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