Filter and power electronic controller

Abstract

The invention provides a filter and a power electronic controller. The filter comprises a shell, an electrical element group and a main copper bar, the electrical element group is at least partially arranged in the shell and comprises two capacitor assemblies and an inductor; the two capacitor assemblies are arranged in a spaced mode in the first direction, each capacitor assembly comprises two Y capacitors arranged in a spaced mode in the second direction, and the second direction is perpendicular to the first direction; the inductor is arranged between the two capacitor assemblies; the main copper bar penetrates through two opposite side walls of the inductor and the shell along a first direction, and also penetrates through an area between the two Y capacitors of the capacitor assembly; the main copper bar is also electrically connected with the capacitor assembly; and the shell, the electrical element group and the main copper bar are kept relatively static. The filter not only has a good electromagnetic compatibility requirement, but also has a good space utilization rate, and can meet the development requirements of high power density and miniaturization of new energy automobiles.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor control, and particularly relates to a filter and a power electronic controller. Background Art

[0002] With the rapid development of new energy vehicles, in order to improve market competitiveness, vehicle manufacturers have put forward higher requirements for parts manufacturers in terms of technological innovation, cost control, etc. As one of the key components of the three-electric system of new energy vehicles, the technological innovation of each component inside the power electronic controller plays a very important role in cost control and market competitiveness. The design scheme of the EMC filter, which is one of the core components of the power electronic controller, has a significant impact on cost, overall machine space layout, etc.

[0003] Most of the EMC filters in the prior art adopt a design scheme of laying out inductors and capacitors flat. The space utilization rate of this scheme is poor, and it is difficult to meet the development requirements of high power density and miniaturization of new energy vehicles. Summary of the Invention

[0004] The purpose of the present invention is to provide a filter and a power electronic controller, aiming to improve the space utilization rate of the filter.

[0005] To achieve the above purpose, the present invention provides a filter, including:

[0006] A housing;

[0007] An electrical component group, at least partially disposed in the housing, and including two capacitor assemblies and an inductor; the two capacitor assemblies are arranged at intervals along a first direction, and each capacitor assembly includes two Y capacitors arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; the inductor is disposed between the two capacitor assemblies;

[0008] A main copper busbar, penetrating through opposite two side walls of the inductor and the housing along the first direction, and also passing through the region between the two Y capacitors of each capacitor assembly; the main copper busbar is also electrically connected to each capacitor assembly;

[0009] The housing, the electrical component group, and the main copper busbar remain relatively stationary.

[0010] Optionally, the number of the electrical component groups is one; or,

[0011] The number of the electrical component groups is multiple, the multiple electrical component groups are arranged along the first direction, and two adjacent electrical component groups share one capacitor assembly.

[0012] Optionally, the current direction on the main copper busbar is perpendicular to the current direction on the capacitor assembly.

[0013] Optionally, at least one of the capacitor assemblies further includes an X capacitor, which is stacked on one end of the corresponding Y capacitor in the third direction, and the third direction is perpendicular to the first direction and the second direction.

[0014] Optionally, the housing has an inner cavity, and one end of the inner cavity in the third direction is an open end; at least part of the electrical component group is disposed in the inner cavity, and the X capacitor is closer to the open end of the inner cavity than the corresponding Y capacitor.

[0015] Optionally, the number of the main copper bars is two, and the two main copper bars are spaced apart in the second direction;

[0016] The main copper bar includes a first copper bar and a second copper bar; the first copper bar is a linear structure extending along the first direction, the first copper bar penetrates through the inductor, and also passes through the two Y capacitors of the capacitor assembly and is electrically connected to the capacitor assembly; one second copper bar is connected to each of the two opposite ends of the first copper bar in the first direction, the second copper bar is connected to the surface of the corresponding first copper bar perpendicular to the second direction, and the second copper bar penetrates through the side wall of the housing.

[0017] Optionally, the second copper bar is connected to the surface of the corresponding first copper bar away from the other first copper bar.

[0018] Optionally, the distance between the two first copper bars is 3.5 mm to 4.5 mm.

[0019] Optionally, it further includes a potting colloid, which fills the gaps between the inductor, the capacitor assembly, the main copper bar and the housing, and is also bonded to the housing, the inductor, the capacitor assembly and the main copper bar to keep the electrical component group, the main copper bar and the housing relatively stationary; the potting colloid also covers the Pin feet of the capacitor assembly.

[0020] Optionally, the housing includes a main housing and end caps; the main housing has an inner cavity, and notches are respectively provided on two opposite side walls of the main housing in the first direction; one end of the inner cavity and the notches in the third direction is an open end, and a plug-in groove extending along the edge of the notch and communicating with the notch is further provided on the part of the main housing located outside the periphery of the notch; the number of the end caps is two, each end cap is plugged at one plug-in groove and closes the corresponding notch, and a second engaging through hole extending along the first direction and for the main copper bar to pass through is further provided on the end cap;

[0021] The third direction is perpendicular to the first direction and the second direction.

[0022] To achieve the above object, the present invention further provides a power electronic controller, including the filter as described in any one of the preceding items.

[0023] Compared with the prior art, the filter and the power electronic controller of the present invention have the following advantages:

[0024] The aforementioned filter includes a housing, an electrical component group, and a main copper busbar; at least part of the electrical component group is disposed in the housing, and includes two capacitor assemblies and an inductor; the two capacitor assemblies are arranged at intervals in a first direction, and each capacitor assembly includes two Y capacitors arranged at intervals in a second direction, the second direction being perpendicular to the first direction; the inductor is disposed between the two capacitor assemblies; the main copper busbar penetrates through opposite two side walls of the inductor and the housing in the first direction, and also passes through the region between the two Y capacitors of each capacitor assembly; the main copper busbar is also electrically connected to each capacitor assembly; the housing, the electrical component group, and the main copper busbar remain relatively stationary. The arrangement of the electrical component group and the main copper busbar, on the one hand, meets the requirement that the current direction on the capacitor assembly is perpendicular to the current direction on the main copper busbar, so that the filter has good electromagnetic compatibility, and on the other hand, greatly improves the space utilization rate of the filter to meet the development requirements of high power density and miniaturization of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to better understand the present invention and do not constitute an improper limitation to the present invention. Among them:

[0026] Figure 1 is an exploded schematic view of the filter provided by the present invention according to an embodiment;

[0027] Figure 2 is Figure 1 a partial schematic view of, mainly showing the first capacitor assembly in the figure;

[0028] Figure 3 is Figure 1 a partial schematic view of, mainly showing the second capacitor assembly in the figure;

[0029] Figure 4 is a partial structural schematic view of the filter provided by the present invention according to an embodiment, with the housing and potting colloid not shown in the figure;

[0030] Figure 5 is a cross-sectional view of the inductor of the filter provided by the present invention according to an embodiment;

[0031] Figure 6FIG. 0 is a schematic diagram of a partial structure of a filter provided according to an embodiment of the present invention, which shows the cooperation relationship among the main copper busbar, the transition copper busbar, and the docking copper busbar, and the capacitor assembly in the figure is the second capacitor assembly;

[0032] Figure 7 FIG. 4 is a schematic diagram of a partial structure of a filter provided according to an embodiment of the present invention. The end cover is not shown in the figure, and the insertion slot on the main housing is shown;

[0033] Figure 8 FIG. 8 is a schematic diagram of an end cover of a housing of a filter provided according to an embodiment of the present invention;

[0034] Figure 9 FIG. 12 is a schematic diagram of a partial structure of a filter provided according to an embodiment of the present invention, which shows the cooperation relationship between the end cover and the main housing.

[0035] [Description of reference numerals is as follows]: 100 - housing, 101 - inner cavity, 110 - main housing, 111 - notch, 112 - insertion slot, 120 - end cover, 121 - end cover body, 122 - reinforcing rib, 1201 - second engagement through hole, 130 - sealing ring, 200 - electrical component group, 210 - capacitor assembly, 211 - Y capacitor, 212 - channel, 212 - X capacitor, 220 - inductor, 221 - inductor body, 222 - insulating housing, 2221 - first engagement through hole, 222 - insulating spacer, 300 - main copper busbar, 300 - main copper busbar, 310 - first copper busbar, 320 - second copper busbar, 400 - docking copper busbar, 500 - grounding copper busbar, 600 - potting colloid. Detailed Embodiments

[0036] The following describes the embodiments of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0037] In addition, each of the embodiments described below has one or more technical features. However, this does not mean that the inventor must implement all the technical features in any one embodiment simultaneously, or that only one or all of the technical features in different embodiments can be implemented separately. In other words, on the premise that implementation is possible, those skilled in the art can, according to the disclosure of the present invention and in view of design specifications or implementation requirements, selectively implement some or all of the technical features in any one embodiment, or selectively implement the combination of some or all of the technical features in multiple embodiments, thereby increasing the flexibility in implementing the present invention.

[0038] As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural form "plural" includes more than two referents, unless the context clearly indicates otherwise. As used in this specification, the term "or" is generally used in the sense of including "and / or", unless the context clearly indicates otherwise, and the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. The relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor do they indicate or imply relative importance or implicitly specify the quantity of the indicated technical features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The object of the present invention is to provide a filter, which has the characteristics of being structurally compact and having high space utilization rate on the premise of good electromagnetic compatibility.

[0040] To make the object, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and are all drawn with non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar components.

[0041] As Figures 1 to 4 shown, the filter includes a housing 100, an electrical component group 200 and a main copper bus 300.

[0042] Among them, the housing 100 has an inner cavity 101.

[0043] The electrical component group 200 is arranged in the inner cavity 101 of the shell 100, and the electrical component group 200 includes two capacitor components 210 and an inductor 220. The two capacitor components 210 are arranged at intervals along the first direction, and the inductor 220 is arranged between the two capacitor components 210. That is, in the first direction, the arrangement of the electrical component group 200 is: capacitor component 210-inductor 220-capacitor component 210. Each of the capacitor components 210 includes two Y capacitors 211, and the two Y capacitors 211 of the same capacitor component 210 are arranged at intervals along the second direction so that a channel (not marked in the figure) is formed between the two Y capacitors 211. The second direction is perpendicular to the first direction. Figure 1 In the figure, the first direction is represented by a double-headed arrow X, and the second direction is represented by a double-headed arrow Y.

[0044] The main copper bar 300 passes through the inductor 220 and two opposite side walls of the housing 100 along the first direction, and the main copper bar 300 also passes through the channel of each capacitor assembly 210 along the first direction, and the main copper bar 300 is also electrically connected to each capacitor assembly 210. It can be understood that the main copper bar 300 passing through the two opposite side walls of the housing 100 along the first direction means that the main copper bar 300 passes through the two opposite side walls of the housing 100 in the first direction.

[0045] The housing 100 , the electrical component group 200 , and the main copper busbar 300 remain relatively still.

[0046] The arrangement of the electrical component group 200 and the main copper busbar 300 in the filter provided by the embodiment of the present invention can satisfy the direction of the current on the main copper busbar 300 (such as Figure 2 ① in the figure) is perpendicular to the direction of the current on the capacitor component 210 (as shown by the arrow ① in the figure). Figure 2 ② in the figure), so that the filter has good electromagnetic compatibility performance, and on the other hand, it also improves the structural compactness and space utilization of the filter to adapt to the high power density and miniaturization development trend of new energy vehicles. It can be understood that the main copper bar 300 runs through the side wall of the housing 100 and partially extends to the outside of the housing 100, so that the filter can be connected to external devices such as external high-voltage lines, capacitors, etc. through the main copper bar 300, and then receive external signals.

[0047] In an embodiment of the present invention, the filter includes at least one of the electrical component groups 200. When the filter includes a plurality of the electrical component groups 200, the plurality of the electrical component groups 200 are arranged along the first direction, and two adjacent electrical component groups 200 share one capacitance component 210.

[0048] The number of the electrical component groups 200 determines the filtering stage number of the filter. The filtering stage number refers to the sum of the number of the capacitance components 210 and the number of the inductors 220 in the filter. That is, when the filter includes n electrical component groups 200, the filtering stage number of the filter is 2n + 1, where n is a positive number greater than or equal to 1. For example, the filter includes one electrical component group 200, so the filter includes two capacitance components 210 and one inductor 220. Thus, the filtering stage number of the filter is three, that is, the filter is formed into a three-stage filtering structure. Another example is that the filter includes two electrical component groups 200, so the filter includes three capacitance components 210 and two inductors 220. Thus, the filtering stage number of the filter is five, that is, the filter is formed into a five-stage filtering structure. Another example is that the filter includes three electrical components 200, so the filter includes four capacitance components 210 and three inductors 220. Thus, the filtering stage number of the filter is seven, that is, the filter is formed into a seven-stage filtering structure. Of course, the filter may further include more electrical component groups 200, which will not be listed one by one here.

[0049] It is easy to understand that when the filter includes a plurality of the electrical component groups 200, all the capacitance components 210 and all the inductors 220 of the filter are alternately arranged. Filters with different filtering stage numbers have different filtering effects. Thus, in the embodiment of the present invention, without changing the overall structure of the filter, only by adjusting the number of the electrical component groups 200, filters with different filtering effects can be prepared.

[0050] In addition, compared with the three-stage filtering structure in the prior art, the space volume of the three-stage filtering structure provided by the embodiment of the present invention is reduced by about 72.6%.

[0051] At least some of the capacitance components 210 may include only the Y capacitors 211, or at least some of the capacitance components 210 may include not only two Y capacitors 211 but also X capacitors 212. The X capacitors 212 are disposed at one end of the corresponding Y capacitors 211 in the third direction. The third direction is perpendicular to the first direction and the second direction. Figure 1 The third direction is represented by a two-way arrow Z.

[0052] For convenience of description, the capacitor assembly 210 that only includes the Y-capacitor 211 is referred to as the first capacitor assembly, and the capacitor assembly 210 that includes both the Y-capacitor 211 and the X-capacitor 212 is referred to as the second capacitor assembly. For any one of the electrical component groups 200, its two capacitor assemblies 210 can both be the first capacitor assembly, or both be the second capacitor assembly, or one be the first capacitor assembly and the other be the second capacitor assembly. It is specifically determined according to requirements. In other words, in the filter provided by the embodiments of the present invention, all the capacitor assemblies 210 can be the first capacitor assembly, or all the capacitor assemblies 210 can be the second capacitor assembly, or some of the capacitor assemblies 210 are the first capacitor assembly and some of the capacitor assemblies 210 are the second capacitor assembly.

[0053] The configurations of different capacitor assemblies 210 result in different filtering effects of the filter. That is, in the embodiments of the present invention, without changing the overall construction method of the filter, but only by adjusting the type of the capacitor assemblies 210 in the electrical component group 200, filters with different filtering effects can be prepared.

[0054] Thus, in the embodiments of the present invention, by adjusting the number of the electrical component groups 200, and / or adjusting the type of the capacitor assemblies 210 in at least one of the electrical component groups 200, filters with different filtering effects can be prepared.

[0055] As Figure 1 Figure 4 、 Figure 7 and Figure 9 shown, the number of the main copper bars 300 is two, and the two main copper bars 300 are arranged at intervals in the first direction to maintain electrical isolation.

[0056] As Figure 5 shown, the inductor 220 includes an inductor body 221 and an insulating housing 222 wrapped on the outer surface of the inductor body 221. Two mutually isolated first bonding through holes 2221 are formed on the insulating housing 222. Each main copper bar 300 passes through one of the first bonding through holes 2221. Thus, the two main copper bars 300 achieve the effect of being arranged at intervals in the first direction under the action of the insulating housing 222. In addition, under the action of the insulating housing 221, the main copper bar 300 is also electrically isolated from the inductor body 221.

[0057] It can be further understood that each of the main busbars 300 passes through the channels of the capacitor assembly 210 and through two side walls of the housing 100 that are opposite to each other in the first direction. In addition, each of the main busbars 300 is electrically connected to the capacitor assembly 210.

[0058] Preferably, the main busbar 300 includes a first busbar 310 and a second busbar 320. The first busbar 310 is a linear structure extending in the first direction, and the first busbar 310 passes through the first engagement through hole 2211 and the channels of the capacitor assembly 210. The first busbar 310 is also electrically connected to the capacitor assembly 210. Each of the first busbars 310 is connected to a second busbar 320 at opposite ends in the first direction. The second busbar 320 is connected to a surface of the corresponding first busbar 310 perpendicular to the second direction, and the second busbar 320 passes through the side wall of the housing 100. In this way, the material utilization rate of the main busbar 300 can be improved, and the material consumption for manufacturing the main busbar 300 can be reduced.

[0059] Furthermore, the second busbar 320 is connected to a surface of the corresponding first busbar 310 away from the other main busbar 300. By doing so, the distance between the two first busbars 310 can be minimized as much as possible. It is easy to understand that the main busbar 300 and the inductor 220 together form at least a part of the busbar magnetic core structure. The distance between the two first busbars 310 being as small as possible can enable the main busbar magnetic core structure to achieve the effect of minimizing the magnetic core volume while having the same magnetic flux area, and at the same time can also reduce the material cost of the magnetic core. In practice, the distance between the two first busbars 300 in the second direction can be 3.5 mm to 4.5 mm.

[0060] In the embodiment of the present invention, the first busbar 310 can be electrically connected to the capacitor assembly 210 in any suitable manner. In an alternative embodiment, as Figures 1 to 3 、 Figures 6 to 9 shown, the filter further includes a docking busbar 400, and the first busbar 310 is electrically connected to the capacitor assembly 210 through the docking busbar 400.

[0061] Each of the capacitor components 210 is electrically connected to two of the first busbars 310 through two of the docking busbars 400 respectively. Specifically, when the capacitor component 210 is the first capacitor component, one Y-capacitor 211 of the first capacitor component is electrically connected to one of the first busbars 310 through one of the docking busbars 400, and the other Y-capacitor 211 of the first capacitor component is electrically connected to the other of the first busbars 300 through the other docking busbar 400; when the capacitor component 210 is the second capacitor component, one Y-capacitor 211 and the X-capacitor 212 of the second capacitor component are electrically connected to one of the first busbars 310 through the same docking busbar 400, and the other Y-capacitor 211 of the second capacitor component is electrically connected to the other of the first busbars 310 through the other docking busbar 400.

[0062] In addition, as Figures 1 to 4 , Figures 6 to 9 shown, preferably, the filter further includes a grounding busbar 500, which is electrically connected to the capacitor component 210 and is also used for grounding.

[0063] Preferably, as Figure 1 , Figures 7 to 9 shown, the housing 100 includes a main housing 110 and end caps 120, and the main housing 110 and the end caps 120 are integrally formed. The main housing 110 has the inner cavity 101, and notches 111 are respectively provided on two opposite side walls of the main housing 110 in the first direction. One end of the inner cavity 101 and the notches 111 in the third direction is an open end. On a portion of the main housing 110 located outside the periphery of the notches 111, there is also provided a plug-in groove 112 extending along the edge of the notch and communicating with the notch. The number of the end caps 120 is two, and each end cap 120 can be partially inserted into one of the plug-in grooves 112 in the third direction to realize the connection between the end cap 120 and the main housing 110 and close the corresponding notch 111. The end cap 120 is also provided with a second engagement through hole 1201 extending in the first direction, and the main busbar 300 passes through the second engagement through hole 1201. It should be understood that two second engagement through holes 1201 are provided on each end cap 120 at intervals in the second direction. Such a setting is beneficial to facilitate the assembly of the filter, and the specific assembly process of the filter will be described in detail later.

[0064] As Figure 9 shown, preferably, the housing 100 further includes a sealing ring 130 provided between the end cap 120 and the groove wall of the plug-in groove 112.

[0065] Optionally, asFigure 8 As described above, the end cap 120 includes an end cap body 121 and reinforcing ribs 122. The reinforcing ribs 122 are connected to the end cap body 121 and protrude from the end cap body 121 in the first direction. The second engaging through hole 1201 penetrates through the end cap body 121 and the reinforcing ribs 122. The arrangement of the reinforcing ribs 122 can ensure that the end cap 120 has good strength while reducing the material consumption and volume of the end cap 120. It should be noted that when the end cap 120 is assembled with the main housing 110, the reinforcing ribs 122 are located outside the main housing 100.

[0066] Both the main housing 110 and the end cap 120 can be formed by injection molding.

[0067] In addition, when any one of the capacitor assemblies 210 of the filter is the second capacitor assembly, the X capacitor 212 is stacked on one side of the corresponding Y capacitor 211 close to the open end of the inner cavity 101. In other words, the X capacitor 212 is closer to the open end of the inner cavity 101 than the Y capacitor 211.

[0068] Optionally, as Figure 1 shown, the filter further includes a potting colloid 600, and the potting colloid 600 is filled in the gaps between the capacitor assembly 210, the inductor 220, the main copper bus 300, the docking copper bus 400, the grounding copper bus 500, and the housing 100, and is also bonded to the housing 100, the capacitor assembly 210, the inductor 220, the main copper bus 300, the docking copper bus 400, and the grounding copper bus 500. By filling the potting colloid 600 in the gaps between the various components, the effect of keeping the various components relatively stationary can be achieved.

[0069] It can be understood that the potting colloid 600 also covers the pins of the capacitor assembly 210 to provide electrical isolation protection for the pins of the capacitor assembly 210.

[0070] Next, the assembly process of the filter will be introduced. The specific assembly process is as follows, including:

[0071] Step S1: Assemble the first copper bus 310 and the inductor 220 to obtain a first assembly. That is, partially insert two of the first copper buses 310 through the first engaging through holes 2211 of the inductor 220, and make the two first copper buses 310 located on opposite sides of the insulating spacer 222 in the second direction.

[0072] Step S2: Assemble the second copper busbar 320 and the end cap 120 to obtain a second assembly. That is, pass each second copper busbar 320 through one of the second engagement through-holes 1201 of one end cap 120.

[0073] Step S3: Assemble the first assembly and the second assembly to obtain a third assembly. That is, connect the second copper busbar 320 to the first copper busbar 310. The specific connection method can be welding, such as laser welding, resistance welding or other suitable welding methods.

[0074] Step S4: Assemble the capacitor assembly 210, the docking copper busbar 400, and the third assembly to obtain a fourth assembly. That is, connect the Y capacitor 211 of each capacitor assembly 210, or the Y capacitor 211 and the X capacitor 212 of the capacitor assembly 210 to the first copper busbar 310 through the docking copper busbar 400. The specific connection method can be welding, such as laser welding, resistance welding or other suitable welding methods.

[0075] Step S5: Place the fourth assembly into the inner cavity 101 of the main housing 110.

[0076] Step S6: Pour potting glue into the inner cavity 101 of the main housing 110. It can be understood that the potting colloid 600 is formed after the potting glue is cured.

[0077] Furthermore, an embodiment of the present invention also provides a power electronic controller, and the power electronic controller includes the aforementioned filter.

[0078] Although the present invention is disclosed as above, it is not limited thereto. Those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A filter, characterized in that, Comprising: A housing; An electrical component group, at least partially disposed within the housing, and including two capacitor assemblies and an inductor; the two capacitor assemblies are spaced apart along a first direction, and each capacitor assembly includes two Y capacitors spaced apart along a second direction, the second direction being perpendicular to the first direction; the inductor is disposed between the two capacitor assemblies; A main copper busbar, extending through opposite side walls of the inductor and the housing along the first direction, and further passing through a region between the two Y capacitors of each capacitor assembly; the main copper busbar is also electrically connected to each capacitor assembly; The housing, the electrical component group, and the main copper busbar remain relatively stationary.

2. The filter according to claim 1, characterized in that, The current direction on the main copper busbar is perpendicular to the current direction on the capacitor assembly.

3. The filter according to claim 1, characterized in that, The number of the electrical component groups is one; or, The number of the electrical component groups is multiple, and the multiple electrical component groups are arranged along the first direction, and two adjacent electrical component groups share one capacitor assembly.

4. The filter according to claim 3, wherein At least one of the capacitor assemblies further includes an X capacitor, and the X capacitor is stacked on one end of the corresponding Y capacitor in a third direction, the third direction being perpendicular to the first direction and the second direction.

5. The filter according to claim 4, characterized in that, The housing has an inner cavity, and one end of the inner cavity in the third direction is an open end; the electrical component group is at least partially disposed in the inner cavity, and the X capacitor is closer to the open end of the inner cavity than the corresponding Y capacitor.

6. The filter according to claim 1, wherein The number of the main copper busbars is two, and the two main copper busbars are spaced apart in the second direction; The main copper busbar includes a first copper busbar and a second copper busbar; the first copper busbar is a linear structure extending along the first direction, the first copper busbar passes through the inductor, and further passes through the two Y capacitors of the capacitor assembly, and is electrically connected to the capacitor assembly; two ends of the first copper busbar opposite to each other in the first direction are respectively connected with a second copper busbar, the second copper busbar is connected to a surface of the corresponding first copper busbar perpendicular to the second direction, and the second copper busbar passes through the side wall of the housing.

7. The filter according to claim 6, wherein The second copper busbar is connected to a surface of the corresponding first copper busbar away from the other first copper busbar.

8. The filter according to claim 7, characterized in that The distance between the two first copper busbars is 3.5 mm to 4.5 mm.

9. The filter according to claim 1, characterized in that It further includes a potting colloid, and the potting colloid fills the gaps between the inductor, the capacitor assembly, the main copper busbar, and the housing, and is also bonded to the housing, the inductor, the capacitor assembly, and the main copper busbar, so that the electrical component group, the main copper busbar, and the housing remain relatively stationary; the potting colloid also covers the Pin pins of the capacitor assembly.

10. The filter according to claim 1, characterized in that, The housing includes a main housing and end caps; the main housing has an inner cavity, and two side walls of the main housing that are opposite to each other in the first direction are respectively provided with notches; one end of the inner cavity and the notches in the third direction is an open end; a plug-in groove extending along the edge of the notch and communicating with the notch is further provided on a portion of the main housing located outside the periphery of the notch; the number of the end caps is two, each end cap is plugged at one plug-in groove and closes the corresponding notch, and a second engagement through hole extending in the first direction and for the main copper busbar to pass through is further provided on the end cap. The third direction is perpendicular to the first direction and the second direction.

11. A power electronic controller, characterized in that, It includes the filter according to any one of claims 1-10.

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