CN219780111U - filter - Google Patents

Abstract

The utility model discloses a filter, which comprises a capacitor assembly, a busbar assembly, a grounding metal sheet and a magnetic ring, wherein the capacitor assembly comprises at least one group of first capacitors arranged side by side, and the number of each group of first capacitors is at least two; the busbar assembly comprises at least two power distribution busbars, the number of the power distribution busbars is consistent with the number of the first capacitors in the capacitor assembly and corresponds to that of the first capacitors one by one, and each first capacitor is sleeved on the corresponding power distribution busbar and is electrically connected with the corresponding power distribution busbar; the grounding metal sheet is electrically connected with each first capacitor; the magnetic ring is sleeved on the busbar assembly, and two ends of the power distribution busbar are exposed out of the magnetic ring. The utility model reduces the volume of the filter and increases the space utilization rate.

Description

Filter

Technical Field

The utility model relates to the field of direct current filtering, in particular to a filter.

Background

In the filter circuit design, the capacitor plays a role in filtering interference signals. In an ideal circuit, the capacitor is purely capacitive, and in an actual circuit, the capacitor also has inductance, so in an actual filter circuit, the capacitor is inductive after the resonant frequency, the voltage phase advances from the current phase, reactive power and reactive current are generated, and the filter performance of the capacitor is reduced.

At present, a filter is adopted to solve the problem of capacitance lead inductance, a capacitor in the filter is of a cylindrical hollow structure, a busbar penetrates through the inside of the capacitor, two end faces of the capacitor are respectively pressed on a metal busbar and a metal shell, and the copper busbar is connected with the end face of the capacitor and the other end face of the capacitor is connected with the metal shell through the pressure of a metal nut pressing plate.

However, in the existing filter, the capacitor really plays a role in filtering, but other connecting pieces such as nuts, pressing plates and metal shells in the filter account for about 30% -50% of the total volume, so that the filter has the problems of large volume, limited installation position and the like.

Disclosure of Invention

The utility model mainly aims to provide a filter, and aims to solve the problems of large size and low space utilization rate of the existing filter.

In order to achieve the above object, the present utility model provides a filter, which includes a capacitor assembly, a busbar assembly, a grounding metal sheet and a magnetic ring, wherein the capacitor assembly includes at least one set of first capacitors arranged side by side, and the number of each set of first capacitors is at least two; the busbar assembly comprises at least two power distribution busbars, the number of the power distribution busbars is consistent with the number of the first capacitors in the capacitor assembly and corresponds to that of the first capacitors one by one, and each first capacitor is sleeved on the corresponding power distribution busbar and is electrically connected with the corresponding power distribution busbar; the grounding metal sheet is electrically connected with each first capacitor; the magnetic ring is sleeved on the busbar assembly, and two ends of the power distribution busbar are exposed out of the magnetic ring.

In an embodiment, the capacitor assembly includes at least two sets of first capacitors arranged side by side, the multiple sets of capacitor assemblies are arranged at intervals along the extending direction of the distribution busbar, and the magnetic ring is arranged between at least two sets of capacitor assemblies.

In an embodiment, the number of the magnetic rings is multiple, the multiple magnetic rings are arranged at intervals along the extending direction of the power distribution busbar, and a capacitor assembly is arranged between at least two magnetic rings.

In one embodiment, the magnetic ring is an integral part; or, the magnetic ring is formed by mutually splicing two non-closed arc-shaped rings.

In an embodiment, the capacitor assembly further includes annular metal sheets, and the number of the annular metal sheets is consistent with and corresponds to the number of the first capacitors one by one;

the first capacitor is provided with a first conductive end face and a second conductive end face which are oppositely arranged, a through hole is formed in the first capacitor, and the through hole penetrates through the first conductive end face and the second conductive end face;

the power distribution busbar is arranged in a penetrating mode through the through hole of the first capacitor, the annular metal sheet is sleeved on the power distribution busbar, the annular metal sheet is electrically connected with the power distribution busbar, and the annular metal sheet is adjacent to and electrically connected with the first conductive end face of the first capacitor;

the grounding metal sheet is provided with a first via hole, the grounding metal sheet is sleeved on the power distribution busbar, and the grounding metal sheet is adjacent to and electrically connected with the second conductive end face of the first capacitor.

In an embodiment, the grounding metal sheet includes a metal sheet body and an elastic sheet that are connected to each other, the metal sheet body forms the first via hole, the elastic sheet is disposed at one end of the metal sheet body, and the metal sheet body is adjacent to and electrically connected to the second conductive end face of the first capacitor.

In an embodiment, the grounding metal sheet includes a metal sheet body forming the first via hole and a pin connected with an end of the metal sheet body.

In an embodiment, two groups of metal bumps are formed on the annular metal sheet, the metal bumps are arranged along the circumferential direction of the distribution busbar, one group of metal bumps are electrically connected with the distribution busbar, and the other group of metal bumps are electrically connected with the first conductive end face of the first capacitor.

In an embodiment, the capacitor assembly further comprises a second capacitor, and the second capacitor is electrically connected with the annular metal sheet.

In an embodiment, a group of metal bumps are arranged in the circumferential direction of the first via hole on the grounding metal sheet, and one group of metal bumps are electrically connected with the second conductive end face of the capacitor.

In an embodiment, the filter further comprises a housing, wherein an accommodating space is formed in the housing, the capacitor assembly, the busbar assembly, the grounding metal sheet and the magnetic ring are all located in the accommodating space, and two ends of the distribution busbar extend out of the housing.

In an embodiment, the shell includes a bottom shell and two baffles, two baffles are respectively connected to opposite ends of the bottom shell, the bottom shell and the two baffles enclose into an accommodating space, and the two baffles are provided with second through holes.

In an embodiment, a fixing lug assembly is formed on the bottom shell at a position corresponding to the grounding metal sheet, the fixing lug assembly comprises two fixing lugs arranged side by side, grooves are formed in each fixing lug, and the pins are respectively arranged in the grooves.

According to the technical scheme, when the number of the capacitor assemblies is multiple, the capacitor assemblies are arranged at intervals along the extending direction of the distribution busbar, the number of each group of the first capacitors is at least two, the number of the distribution busbar in the busbar assemblies is consistent with the number of the first capacitors in the capacitor assemblies and corresponds to one by one, and each first capacitor in the capacitor assemblies is provided with one distribution busbar in a penetrating way, so that the first capacitors are electrically connected with the distribution busbar, and the lead inductance of the first capacitors can be prevented from becoming large in the working process. The magnetic ring is sleeved on the busbar assembly, the busbar assembly comprises at least two power distribution busbars, each power distribution busbar in the busbar assembly is sleeved by the magnetic ring, two ends of each power distribution busbar are exposed out of the magnetic ring, and the grounding metal sheet is electrically connected with each first capacitor, so that the grounding metal sheet is grounded after the grounding wire is connected with the first capacitors. In the filter in this embodiment, the first capacitor and the magnetic ring are both sleeved outside the power distribution busbar, and the grounding metal sheet is adopted to realize the grounding of each capacitor, so that the problems of large volume and low space utilization rate of the existing filter are solved, the whole volume of the filter is reduced, and the effect of improving the installation flexibility of the filter is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a filter according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a filter according to an embodiment of the present utility model assembled in a housing;

FIG. 3 is a schematic diagram of the explosive structure of FIG. 2;

fig. 4 is a schematic structural diagram of connection between a grounding metal sheet, a first capacitor, a distribution busbar and an annular metal sheet according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a connection between a grounding metal sheet, a first capacitor and a distribution busbar according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of connection between a ring metal sheet, a first capacitor and a distribution busbar according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a connection structure of a second capacitor to a ring-shaped metal sheet according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a housing according to an embodiment of the utility model.

Fig. 9 is a schematic structural diagram of a grounding metal sheet including a metal sheet body and a spring sheet in a feedthrough capacitor according to an embodiment of the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Filter	51	First metal bump
1	Capacitor assembly	52	Second metal bump
				11	First capacitor	313	Third metal bump
2	Busbar assembly	6	Outer casing
				21	Distribution busbar	61	Accommodation space
3	Grounding metal sheet	62	Bottom shell
				31	Sheet metal body	63	Baffle plate
311	First via hole	631	Second via hole
				32	Pin	621	Fixed ear
4	Magnetic ring	6211	Groove
				5	Annular metal sheet	7	Metal insert
111	A first conductive end face	33	Spring plate
				112	Second conductive end face	12	Second capacitor
113	Through hole

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 6, a filter 100 according to the present utility model includes a capacitor assembly 1, a busbar assembly 2, a grounding metal sheet 3 and a magnetic ring 4, wherein the capacitor assembly 1 includes at least one set of first capacitors 11 arranged side by side, and the number of each set of first capacitors 11 is at least two; the busbar assembly 2 comprises at least two power distribution busbars 21, the number of the power distribution busbars 21 is consistent with that of the first capacitors 11 in the capacitor assembly 1 and corresponds to that of the first capacitors 11 one by one, and each first capacitor 11 is sleeved on the corresponding power distribution busbar 21 and is electrically connected with the corresponding power distribution busbar 21; the grounding metal sheet 3 is electrically connected with each first capacitor 11; the magnetic ring 4 is sleeved on the busbar assembly 2, and two ends of the power distribution busbar 21 are exposed out of the magnetic ring 4.

In the technical solution of this embodiment, the capacitor assembly 1 is composed of at least one set of first capacitors 11 arranged side by side, and the number of each set of first capacitors 11 is at least two.

When the number of the capacitor modules 1 is plural, the plural capacitor modules 1 are arranged at intervals along the extending direction of the distribution busbar 21.

The number of distribution busbars 21 in the busbar assembly 2 corresponds to the number of first capacitors 11 in the capacitor assembly 1 one to one.

Each first capacitor 11 in the capacitor assembly 1 is sleeved on a corresponding power distribution busbar 21, so that the lead inductance of the first capacitor 11 can be prevented from becoming large in the working process while the first capacitor 11 is electrically connected with the power distribution busbar 21.

The magnetic ring 4 is sleeved on the busbar assembly 2, wherein the busbar assembly 2 comprises at least two power distribution busbars 21, each power distribution busbar 21 in the busbar assembly 2 is sleeved by the magnetic ring 4, and two ends of each power distribution busbar 21 are exposed out of the magnetic ring 4.

The grounding metal sheet 3 is electrically connected to each first capacitor 11, so that the grounding metal sheet 3 realizes the grounding of the first capacitor 11 after being connected to the ground wire.

In the filter 100 of the embodiment, the first capacitor 11 and the magnetic ring 4 are both sleeved on the power distribution busbar 21, and the grounding metal sheet 3 is adopted to realize the grounding of each capacitor, so that the problems of large volume and low space utilization rate of the existing filter 100 are solved, and the effects of reducing the whole volume of the filter 100 and improving the installation flexibility of the filter 100 are achieved.

In an alternative embodiment, the capacitor assembly 1 includes at least two sets of first capacitors 11 arranged side by side, the multiple sets of capacitor assemblies 1 are arranged at intervals along the extension direction of the distribution busbar 21, and a magnetic ring 4 is arranged between at least two sets of capacitor assemblies 1.

Specifically, the filter 100 includes two groups of capacitor assemblies 1, one magnetic ring 4, each group of capacitor assemblies 1 includes two capacitors arranged side by side, the two groups of capacitor assemblies 1 are arranged at intervals along the extending direction of the distribution busbar 21, and the magnetic ring 4 is arranged between the two groups of capacitor assemblies 1 and sleeves the distribution busbar 21, so that the filter 100 in this embodiment forms a CLC filter 100.

Optionally, the filter 100 includes two sets of capacitor assemblies 1, two magnetic rings 4, each set of capacitor assemblies 1 includes two capacitors that are arranged side by side, the two sets of capacitor assemblies 1 are arranged at intervals along the extending direction of the distribution busbar 21, the two magnetic rings 4 are all arranged between the two sets of capacitor assemblies 1 and sleeve the distribution busbar 21, and by arranging the plurality of magnetic rings 4, the power of the filter 100 is increased, and it should be noted that the number of the magnetic rings 4 in the embodiment is not limited to two, the number of the magnetic rings 4 can be three, four or more, and a plurality of magnetic rings 4 are all arranged between the two capacitor assemblies 1.

In an alternative embodiment, the number of the magnetic rings 4 is plural, the plural magnetic rings 4 are arranged at intervals along the extending direction of the distribution busbar 21, and the capacitor assembly 1 is arranged between at least two magnetic rings 4.

Specifically, the filter 100 includes two magnetic rings 4, one capacitor assembly 1, where the two magnetic rings 4 are disposed at intervals along the extending direction of the distribution busbar 21, and one capacitor assembly 1 is disposed between the two magnetic rings 4, so that the filter 100 in this embodiment forms the LCL filter 100.

Optionally, the filter includes two magnetic rings 4, two groups of capacitor assemblies 1, the two magnetic rings 4 are arranged at intervals along the extending direction of the distribution busbar 21, and the two capacitor assemblies 1 are arranged between the two magnetic rings 4 to increase the power of the filter 100, it should be noted that the number of the capacitor assemblies 1 in the embodiment is not limited to two, the number of the capacitor assemblies 1 may be three, four or more, and a plurality of capacitor assemblies 1 are all arranged between the two magnetic rings 4.

In one embodiment, the magnetic ring 4 is an integral part; or, the magnetic ring 4 is formed by mutually splicing two non-closed arc-shaped rings. The magnetic ring 4 is an integrated part, so that the magnetic ring 4 is convenient to manufacture, and the production cost is reduced; the magnetic ring 4 is formed by mutually splicing two non-closed arc-shaped rings, so that the two non-closed arc-shaped rings can be mutually spliced and sleeved on the power distribution busbar 21 in the assembly process of the filter 100, and the production efficiency of the filter 100 is improved.

In one embodiment, the capacitor assembly 1 further includes annular metal sheets 5, and the number of the annular metal sheets 5 is consistent with and corresponds to the number of the first capacitors 11 one by one; the first capacitor 11 has a first conductive end face 111 and a second conductive end face 112 which are disposed opposite to each other, the first capacitor 11 is formed with a through hole 113, and the through hole 113 penetrates through the first conductive end face 111 and the second conductive end face 112; the power distribution busbar 21 is arranged through the through hole 113 of the first capacitor 11 in a penetrating way, the annular metal sheet 5 is sleeved on the power distribution busbar 21, the annular metal sheet 5 is electrically connected with the power distribution busbar 21, and the annular metal sheet 5 is adjacent to and electrically connected with the first conductive end face 111 of the first capacitor 11; the grounding metal sheet 3 is formed with a first via hole 311, the grounding metal sheet 3 is sleeved on the power distribution busbar 21, and the grounding metal sheet 3 is adjacent to and electrically connected with the second conductive end face 112 of the first capacitor 11.

In the technical solution of this embodiment, please refer to fig. 6, the distribution busbar 21 is disposed through the through hole 113, the annular metal sheet 5 is sleeved on the distribution busbar 21, the annular metal sheet 5 is electrically connected with the distribution busbar 21, and the annular metal sheet 5 is electrically connected with the first conductive end face 111 of the first capacitor, and the first capacitor is electrically connected with the distribution busbar 21 through the annular metal sheet 5. The grounding metal sheet 3 is electrically connected to the second conductive end face 112 of the first capacitor 11, so that the grounding metal sheet 3 is electrically connected to the first capacitor 11, and the grounding of the first capacitor 11 is realized by grounding the grounding metal sheet 3.

Optionally, the number of the grounding metal sheets 3 is identical to that of the first capacitors 11, and the second conductive end face 112 of each first capacitor 11 is electrically connected with one grounding metal sheet 3.

Optionally, the number of the grounding metal sheets 3 is not identical to the number of the first capacitors 11, and the second conductive end surfaces 112 of the adjacent first capacitors 11 are electrically connected with the same grounding metal sheet 3. For example, when three first capacitors 11 are provided on one distribution busbar 21, there is one grounding metal sheet 3 shared by two adjacent first capacitors 11, and there is one grounding metal sheet 3 used by one first capacitor 11 alone.

Optionally, the first capacitor 11 in this embodiment is composed of a cylindrical and insulated sleeve and a metal film wound around the sleeve, where the metal film is wound onto the sleeve at a high temperature, and the power distribution busbar 21 is inserted into the insulated sleeve, so that the compressive strength of the first capacitor 11 can be increased, and the first capacitor is prevented from being broken down.

Alternatively, the distribution busbar 21 may be a copper busbar or an aluminum busbar, and in this embodiment, a copper busbar is preferred.

In an embodiment, referring to fig. 9, the grounding metal sheet 3 includes a metal sheet body 31 and a spring sheet 33 connected to each other, the metal sheet body 31 forms a first via hole 311, the spring sheet 33 is disposed at one end of the metal sheet body 31, and the metal sheet body 31 is adjacent to and electrically connected to the second conductive end face 112 of the first capacitor 11.

In an alternative embodiment, the grounding metal sheet 3 is composed of a metal sheet body 31 and an elastic sheet 33 which are connected with each other, the metal sheet body 31 is abutted against the second conductive end face 112 of the first capacitor, so that the metal sheet body 31 is electrically connected with the second conductive end face 112 of the first capacitor, the metal sheet body 31 forms a first via hole 311, so that the distribution busbar 21 can pass through the metal sheet body 31, the installation of the metal sheet body 31 is facilitated, the elastic sheet 33 is used for being connected with a ground wire, the elastic sheet 33 can be bent relative to the metal sheet body 31, the ground wire is conveniently connected with the grounding metal sheet 3, and the grounding of the first capacitor 11 electrically connected with the metal sheet body 31 is realized.

In another embodiment, the grounding metal plate 3 includes a metal plate body 31 and a pin 32, the metal plate body 31 forms a first via 311, and the pin 32 is connected to an end of the metal plate body 31. The pins 32 are used for connecting to ground, and optionally, the number of pins 32 is two, and two pins 32 are arranged side by side. The pins 32 are connected to the ends of the metal sheet body 31, and may be two pins 32 disposed side by side at one end of the metal sheet body 31, as shown in fig. 5, or two pins 32 are disposed at opposite ends of the metal sheet body 31. The pin 32 is electrically connected to the metal sheet body 31, and after the pin 32 is grounded, the metal sheet body 31 can be grounded, so that the first capacitor 11 electrically connected to the metal sheet body 31 is grounded.

In one embodiment, two groups of metal bumps are formed on the annular metal sheet 5, wherein the metal bumps are arranged along the circumferential direction of the distribution busbar 21, one group of metal bumps is electrically connected with the distribution busbar 21, and the other group of metal bumps is electrically connected with the first conductive end face 111 of the first capacitor 11.

In one example, the two sets of metal bumps are a plurality of first metal bumps 51 and a plurality of second metal bumps 52, the plurality of first metal bumps 51 are welded to the first conductive end face 111 of the first capacitor, the plurality of second metal bumps 52 are welded to the distribution busbar 21, wherein the first metal bumps 51 are in surface contact with the first conductive end face 111 of the first capacitor 11, the second metal bumps 52 are in surface contact with the outer wall of the distribution busbar 21, after the first metal bumps 51 of the annular metal sheet 5 are welded to the first conductive end face 111 of the first capacitor, and the second metal bumps 52 of the annular metal sheet 5 are welded to the outer wall of the distribution busbar 21, the connection strength between the annular metal sheet 5 and the distribution busbar 21 and the first capacitor can be increased while the electrical connection between the distribution busbar 21 and the first capacitor 11 is realized, and the reliability of the electrical connection among the annular metal sheet 5, the distribution busbar 21 and the first capacitor 11 is ensured.

In the implementation of the present utility model, the annular metal sheet 5 and the first conductive end face 111 of the first capacitor 11 may be electrically connected by a conductive medium, for example, a conductive medium is disposed between the annular metal sheet 5 and the distribution busbar 21.

Optionally, the conductive medium in this embodiment may be conductive glue, conductive plastic, conductive fiber fabric, conductive paint, or conductive metal such as copper, aluminum, etc.

In one example, the conductive medium is a conductive paste. By arranging the conductive medium between the annular metal sheet 5 and the first conductive end face 111 of the first capacitor 11 and between the annular metal sheet 5 and the distribution busbar 21, the stability of the electrical connection among the distribution busbar 21, the first capacitor 11 and the annular metal sheet 5 can be increased, and the performance stability of the feedthrough capacitor in the embodiment is improved.

Optionally, three optional electrical connection manners are provided between the annular metal sheet 5 and the first conductive end face 111 of the first capacitor 11 and between the annular metal sheet 5 and the distribution busbar 21, wherein the first manner is to separately adopt conductive adhesive to electrically connect the annular metal sheet 5 with the distribution busbar 21 and the first conductive end face 111 of the first capacitor 11, the second manner is to separately adopt metal bumps to electrically connect the annular metal sheet 5 with the distribution busbar 21 and the first conductive end face 111 of the first capacitor 11, and the third manner is to adopt a manner of combining conductive adhesive with metal bumps to electrically connect the annular metal sheet 5 with the distribution busbar 21 and the first conductive end face 111 of the first capacitor 11;

in one embodiment, the capacitor assembly 1 further comprises a second capacitor 12, and the second capacitor 12 is electrically connected to the annular metal sheet 5.

Alternatively, referring to fig. 7, the second capacitor 12 is electrically connected to the ring-shaped metal sheet 5 at a position between the two sets of metal bumps.

In an alternative embodiment, differential mode signal interference between the side-by-side power distribution busbar 21 is eliminated by providing the second capacitor 12.

In an embodiment, the first via hole 311 on the grounding metal sheet 3 is provided with a set of metal bumps along the circumferential direction, and the set of metal bumps is electrically connected to the second conductive end surface 112 of the first capacitor.

In an alternative embodiment, as shown in fig. 5, the via hole on the grounding metal sheet 3 is circumferentially provided with a set of metal bumps, and the set of metal bumps is electrically connected to the second conductive end surface 112 of the first capacitor 11. The group of metal bumps circumferentially arranged through holes in the grounding metal sheet 3 consists of a plurality of third metal bumps 313, and the third metal bumps 313 are welded to the second conductive end face 112 of the first capacitor 11. The third metal bump 313 is welded on the second conductive end face 112 of the first capacitor 11, so that the connection strength between the grounding metal sheet 3 and the first capacitor 11 can be increased while the electrical connection between the grounding metal sheet 3 and the first capacitor 11 is realized, and the reliability of the electrical connection between the grounding metal sheet 3 and the first capacitor 11 is ensured.

In another alternative embodiment, a conductive medium is disposed between the grounding metal sheet 3 and the second conductive end face 112 of the first capacitor 11, where the conductive medium between the grounding metal sheet 3 and the second conductive end face 112 of the first capacitor 11 may be conductive glue, conductive plastic, conductive fiber fabric, conductive paint, or conductive metal such as copper, aluminum, etc. In this embodiment, the conductive adhesive is preferably used, and the conductive medium is used to connect the grounding metal sheet 3 and the second conductive end face 112 of the first capacitor 11, so that the stability of electrical connection between the grounding metal sheet 3 and the second conductive end face 112 of the first capacitor 11 can be increased, and the performance stability of the through-type first capacitor 11 in this embodiment is improved.

Optionally, there are three optional electrical connection manners between the grounding metal sheet 3 and the second conductive end face 112 of the first capacitor 11, the first is that the grounding metal sheet 3 is electrically connected with the second conductive end face 112 of the first capacitor 11 by using conductive adhesive alone, the second is that the grounding metal sheet 3 is electrically connected with the second conductive end face 112 of the first capacitor 11 by using metal bumps alone, and the third is that the grounding metal sheet 3 is electrically connected with the second conductive end face 112 of the first capacitor 11 by using a combination manner of conductive adhesive and metal bumps.

In an embodiment, referring to fig. 1 and 8, the filter 100 further includes a housing 6, the housing 6 is formed with an accommodating space 61, the capacitor assembly 1, the busbar assembly 2, the grounding metal plate 3 and the magnetic ring 4 are all located in the accommodating space 61, and two ends of the distribution busbar 21 extend out of the housing 6.

In this embodiment, the housing 6 is formed with the accommodating space 61, and the filter 100 is disposed in the accommodating space 61 of the housing 6, so that the filter 100 can be prevented from being interfered, extruded, bumped and the like by external components in the working process, the housing 6 can protect the filter 100, and the stability of the filter 100 in the working process is increased, so that the filter 100 in the embodiment of the utility model has the characteristics of pressure resistance, impact resistance, dust resistance and the like.

The two ends of the distribution busbar 21 extend out of the shell 6, so that the distribution busbar 21 is conveniently connected with a power line.

In an embodiment, the housing 6 includes a bottom case 62 and two baffles 63, the two baffles 63 are respectively connected to opposite ends of the bottom case 62, the bottom case 62 and the two baffles 63 enclose an accommodating space 61, and the two baffles 63 are both provided with second through holes 631. The two ends of the power distribution busbar 21 respectively pass through the second through holes of the two baffles 63, so that the two ends of the power distribution busbar 21 extend out of the housing 6, the bottom shell 62 and the baffles 63 can be detachably connected, the filter 100 can be conveniently installed in the accommodating space 61, and the filter 100 can be conveniently installed and maintained.

In an embodiment, a fixing lug 621 assembly is formed on the bottom case 62 corresponding to the position of the grounding metal sheet 3, the fixing lug 621 assembly includes two fixing lugs 621 arranged side by side, each fixing lug 621 is formed with a groove 6211, the pins 32 are respectively arranged in the two grooves 6211, the pins 32 of the grounding metal sheet 3 can be fixed in the grooves 6211, specifically, the filter 100 further includes a metal insert 7, the pins 32 of the grounding metal sheet 3 can be arranged corresponding to the positions of the grooves 6211, the pins 32 of the grounding metal sheet 3 are clamped into the grooves 6211 by the metal insert 7, so that the pins 32 of the grounding metal sheet 3 are fixed, and in addition, in the process of connecting the grounding metal sheet 3 with a ground wire, the pins 32 of the grounding metal sheet 3 can be clamped into the grooves 6211 by the metal insert 7, so that the electrical connection between the pins 32 of the grounding metal sheet 3 and the ground wire is realized.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (13)

1. A filter, the filter comprising:

the capacitive component comprises at least one group of first capacitors arranged side by side, and the number of each group of first capacitors is at least two;

the busbar assembly comprises at least two power distribution busbars, the number of the power distribution busbars is consistent with the number of the first capacitors in the capacitor assembly and corresponds to that of the first capacitors one by one, and each first capacitor is sleeved on the corresponding power distribution busbar and is electrically connected with the corresponding power distribution busbar;

the grounding metal sheet is electrically connected with each first capacitor;

the magnetic ring is sleeved on the busbar assembly, and two ends of the power distribution busbar are exposed out of the magnetic ring.

2. The filter of claim 1, wherein the capacitor assembly includes at least two sets of first capacitors arranged side by side, the sets of capacitor assemblies being arranged at intervals along the extension direction of the distribution busbar, and the magnetic ring being arranged between at least two sets of capacitor assemblies.

3. The filter of claim 1, wherein the number of magnetic rings is plural, the plural magnetic rings are arranged at intervals along the extending direction of the distribution busbar, and the capacitor assembly is arranged between at least two magnetic rings.

4. A filter as claimed in any one of claims 1 to 3, wherein the magnetic ring is an integral part; or, the magnetic ring is formed by mutually splicing two non-closed arc-shaped rings.

5. A filter according to any one of claims 1 to 3, wherein the capacitor assembly further comprises annular metal sheets, the number of which corresponds to the number of the first capacitors one to one;

the first capacitor is provided with a first conductive end face and a second conductive end face which are oppositely arranged, a through hole is formed in the first capacitor, and the through hole penetrates through the first conductive end face and the second conductive end face;

the power distribution busbar is arranged in a penetrating mode through the through hole of the first capacitor, the annular metal sheet is sleeved on the power distribution busbar, the annular metal sheet is electrically connected with the power distribution busbar, and the annular metal sheet is adjacent to and electrically connected with the first conductive end face of the first capacitor;

the grounding metal sheet is provided with a first via hole, the grounding metal sheet is sleeved on the power distribution busbar, and the grounding metal sheet is adjacent to and electrically connected with the second conductive end face of the first capacitor.

6. The filter of claim 5, wherein the grounded metal sheet comprises a metal sheet body and a spring sheet connected to each other, the metal sheet body forming the first via, the spring sheet being disposed at one end of the metal sheet body, the metal sheet body being adjacent to and electrically connected to the second conductive end face of the first capacitor.

7. The filter of claim 5, wherein the ground plate includes a plate body and a pin, the plate body forming the first via, the pin being connected to an end of the plate body.

8. The filter of claim 5, wherein the annular metal sheet has two sets of metal bumps formed thereon along a circumferential direction of the distribution busbar, one set of metal bumps being electrically connected to the distribution busbar, and the other set of metal bumps being electrically connected to the first conductive end face of the first capacitor.

9. The filter of claim 8, wherein the capacitive assembly further comprises a second capacitor electrically connected to the annular metal plate.

10. The filter of claim 5, wherein the first via in the ground plate is provided with a set of metal bumps along a circumferential direction, one set of metal bumps being electrically connected to the second conductive end face of the capacitor.

11. The filter of claim 7, further comprising a housing defining a receiving space, wherein the capacitor assembly, the busbar assembly, the grounding plate and the magnetic ring are all located in the receiving space, and wherein both ends of the distribution busbar extend out of the housing.

12. The filter of claim 11, wherein the housing includes a bottom case and two baffles, the two baffles being connected to opposite ends of the bottom case, respectively, the bottom case and the two baffles enclosing a receiving space, and the two baffles each having a second via hole.

13. The filter of claim 12, wherein a fixing lug assembly is formed on the bottom shell at a position corresponding to the grounding metal sheet, the fixing lug assembly comprises two fixing lugs arranged side by side, each fixing lug is formed with a groove, and the pins are respectively arranged in the two grooves.