Capacitor

Abstract

The utility model discloses a capacitor which comprises a busbar structure. The busbar structure comprises a first busbar and a second busbar, and each of the first busbar and the second busbar is provided with a main body connecting bar used for being connected with a capacitor core, and a direct current terminal and an alternating current terminal which are connected to the main body connecting bar. The alternating current outer side part of the alternating current terminal and the direct current outer side part of the direct current terminal extend out of the capacitor and are horizontally arranged on the same side of the capacitor at intervals; the alternating current inner side part of the alternating current terminal is connected with the near-end side, close to the alternating current outer side part, of the main body connecting bar, and the direct current inner side part of the direct current terminal is connected with the far-end side, away from the direct current outer side part, of the main body connecting bar. The connection part of the direct current terminal and the main body connection bar and the connection part of the alternating current terminal and the main body connection bar are respectively located at the near-end side and the far-end side, which are opposite to each other, of the main body connection bar, so that current can completely pass through the core part of the capacitor, electromagnetic interference can be effectively reduced, and electromagnetic performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors. Background Art

[0002] With the rapid development of power electronics technology, metallized film capacitors are increasingly used in industrial control, new energy, automotive electronics, rail transit, power grids and other fields. At the same time, the electromagnetic interference problem of capacitors is becoming more and more prominent.

[0003] At present, the connection points between the DC terminal and the main copper busbar of the capacitor and the connection points between the AC terminal and the main copper busbar are often distributed on the same side. During the actual use of the capacitor, currents will flow through the adjacent DC terminals and AC terminals, and the currents will interfere with each other, resulting in large electromagnetic interference, which cannot meet the customer's operating conditions. Utility Model Content

[0004] The utility model aims to provide a capacitor which has the advantages of reducing electromagnetic interference and improving electromagnetic performance.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A capacitor includes a busbar structure;

[0007] The busbar structure comprises a first busbar and a second busbar, each of the first busbar and the second busbar having a main connecting bar for connecting the capacitor core, and a DC terminal and an AC terminal connected to the main connecting bar;

[0008] The AC outer portion of the AC terminal and the DC outer portion of the DC terminal both extend out of the capacitor and are located at the same side of the capacitor with a horizontal spacing therebetween;

[0009] The AC inner side of the AC terminal is connected to the proximal side of the main body connection bar close to the AC outer side, and the DC inner side of the DC terminal is connected to the distal side of the main body connection bar away from the DC outer side.

[0010] Further, it also includes a capacitor core;

[0011] The main connecting bars of the first busbar and the second busbar are respectively arranged to be connected to the upper and lower surfaces of the capacitor core;

[0012] The AC inner side of the first busbar is connected to the front end side of the main body connecting bar of the first busbar, and the DC inner side of the first busbar bypasses the front side, bottom side and rear side of the capacitor core and is connected to the rear end side of the main body connecting bar of the first busbar;

[0013] The AC inner side of the second busbar is connected to the front end side of the main connecting bar of the second busbar, and the DC inner side of the second busbar bypasses the front side and bottom side of the capacitor core and is connected to the rear end side of the main connecting bar of the second busbar.

[0014] Furthermore, the DC inner part of the first busbar and the DC inner part of the second busbar partially overlap each other, and are insulated from each other.

[0015] Furthermore, the inner ends of the DC outer portion of the first busbar and the DC outer portion of the second busbar overlap with each other, while the outer ends are perpendicular to each other, and the overlapping portions are insulated from each other.

[0016] Furthermore, the AC inner side of the second busbar includes a connecting vertical plate located on the front side of the capacitor core, the lower end of the connecting vertical plate is connected to the front end side of the main connecting bar of the second busbar, and the upper end is connected to the AC outer side of the second busbar; the main body of the DC inner side of the second busbar is insulated from the front side of the connecting vertical plate and the bottom side of the main connecting bar of the second busbar.

[0017] Furthermore, insulating paper is arranged between the AC inner part of the first busbar and the AC inner part of the second busbar; and insulating paper is arranged between the DC inner part of the first busbar and the DC inner part of the second busbar.

[0018] Furthermore, there are multiple capacitor cores.

[0019] Furthermore, it also includes a shell; the capacitor core and the main body of the busbar structure are located in the shell, the AC outer side of the AC terminal and the DC outer side of the DC terminal both extend out of the shell; and the shell is filled with potting material for sealing.

[0020] Furthermore, the AC outer side of the AC terminal includes a plurality of sub-AC terminals, and each sub-AC terminal and the DC outer side of the DC terminal are horizontally spaced apart from each other; meanwhile, each sub-AC terminal of the first busbar and each sub-AC terminal of the second busbar are staggered with each other.

[0021] Furthermore, the main body connecting bar is a copper bar structure.

[0022] After adopting the above technical scheme, since the connection between the DC terminal and the main body connecting row and the connection between the AC terminal and the main body connecting row are respectively located at the mutually opposite proximal side and distal side of the main body connecting row, the current can pass through the capacitor core part completely, that is, the current of the DC terminal can enter from the distal side of the main body connecting row through the DC outer side and the DC inner side and pass through the capacitor core, and will not flow out directly from the AC terminal as in the prior art; by the same token, it can be known that the current of the AC terminal of this scheme can enter from the proximal side of the main body connecting row through the AC outer side and the AC inner side and pass through the capacitor core, and will not flow out directly from the DC terminal as in the prior art, thereby effectively reducing electromagnetic interference and improving electromagnetic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0024] Figure 2 An exploded view of an embodiment of the utility model;

[0025] Figure 3 This is a three-dimensional diagram of the busbar structure hiding the insulating paper in an embodiment of the utility model;

[0026] Figure 4 It is a side view of the busbar structure of an embodiment of the utility model;

[0027] Figure 5 This is a front view of the busbar structure of an embodiment of the utility model;

[0028] Figure 6 Another stereoscopic view of the busbar structure with hidden insulation paper in an embodiment of the utility model;

[0029] Figure 7 It is a three-dimensional diagram of the second busbar of the embodiment of the utility model;

[0030] Figure 8 It is a three-dimensional diagram of the first busbar of an embodiment of the utility model.

[0031] Description of reference numerals: capacitor 100,

[0032] Busbar structure 10, first busbar 1, second busbar 2, main connecting bar 3, front end side 31, rear end side 32,

[0033] DC terminal 4, DC outer portion 41, inner end portion 411, outer end portion 412, DC inner portion 42,

[0034] AC terminal 5, AC outer part 51, sub-AC terminal 511, AC inner part 52, connecting riser 521,

[0035] Insulation paper 6,

[0036] Capacitor core 20 , housing 30 , and potting material 40 . DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] like Figure 1 and Figure 2 As shown, a capacitor 100 of the present invention includes a busbar structure 10 , a capacitor core 20 and a housing 30 .

[0039] The busbar structure 10 includes a first busbar 1 and a second busbar 2 . The first busbar 1 and the second busbar 2 both have a main connecting bar 3 for connecting a capacitor core 20 , and a DC terminal 4 and an AC terminal 5 connected to the main connecting bar 3 .

[0040] The AC outer portion 51 of the AC terminal 5 and the DC outer portion 41 of the DC terminal 4 both extend out of the capacitor 100 and are located on the same side of the capacitor 100 with a horizontal spacing therebetween.

[0041] The AC inner portion 52 of the AC terminal 5 is connected to the proximal side of the main body connection bar 3 close to the AC outer portion 51 , and the DC inner portion 42 of the DC terminal 4 is connected to the distal side of the main body connection bar 3 away from the DC outer portion 41 .

[0042] In this way, since the connection between the DC terminal 4 and the main connecting row 3 and the connection between the AC terminal 5 and the main connecting row 3 are respectively located at the mutually opposite proximal and distal sides of the main connecting row 3, the current can completely pass through the capacitor core 20 part, that is, the current of the DC terminal 4 can enter from the distal side of the main connecting row 3 through the DC outer side 41 and the DC inner side 42 and pass through the capacitor core 20, while the current of the AC terminal 5 can enter from the proximal side of the main connecting row 3 through the AC outer side 51 and the AC inner side 52 and pass through the capacitor core 20, thereby effectively reducing electromagnetic interference and improving electromagnetic performance.

[0043] In this embodiment, the main body connecting bar 3 may be a copper bar structure. The capacitor 100 may be a metallized film capacitor.

[0044] like Figure 2The main connecting bars 3 of the first busbar 1 and the second busbar 2 are respectively arranged to be connected to the upper and lower surfaces of the capacitor core 20. The upper and lower surfaces of the capacitor core 20 are respectively sprayed with gold and can be respectively welded to the main connecting bars 3 of the first busbar 1 and the second busbar 2.

[0045] There may be a plurality of capacitor cores 20. In this embodiment, four capacitor cores 20 are used as an example, and the four capacitor cores 20 are arranged in a horizontal and vertical array.

[0046] At the same time, the capacitor core 20 and the main body of the busbar structure 10 are located in the shell 30, and the AC outer part 51 of the AC terminal 5 and the DC outer part 41 of the DC terminal 4 both extend out of the shell 30; and the shell 30 is filled with a potting material 40 for sealing, and the potting material 40 can be resin.

[0047] See also Figure 3 , Figure 4 , Figure 7 and Figure 8 The AC inner side portion 52 of the AC terminal 5 of the first busbar 1 is connected to the front end side 31 (referring to the proximal side) of the main connecting bar 3 of the first busbar 1, and the DC inner side portion 42 of the DC terminal 4 of the first busbar 1 bypasses the front side, bottom side and rear side of the capacitor core 20 and is connected to the rear end side 32 (referring to the distal side) of the main connecting bar 3 of the first busbar 1.

[0048] The AC inner side 52 of the AC terminal 5 of the second busbar 2 is connected to the front end side 31 of the main connecting bar 3 of the second busbar 2, and the DC inner side 42 of the DC terminal 4 of the second busbar 2 bypasses the front side and bottom side of the capacitor core 20 and is connected to the rear end side 32 of the main connecting bar 3 of the second busbar 2.

[0049] By making the DC inner portion 42 of the DC terminal 4 bypass the capacitor core 20 , stray inductance can be reduced and electromagnetic performance can be improved.

[0050] See also Figure 6 The DC inner part 42 of the DC terminal 4 of the first busbar 1 and the DC inner part 42 of the DC terminal 4 of the second busbar 2 partially overlap each other, and the two are insulated from each other. Similarly, by increasing the overlapping area, stray inductance can be reduced and electromagnetic performance can be improved.

[0051] See also Figure 5 The DC outer portion 41 of the first busbar 1 DC terminal 4 and the DC outer portion 41 of the second busbar 2 DC terminal 4 have their inner ends 411 overlapped with each other and their outer ends 412 are perpendicular to each other, and the overlapping portions can be insulated from each other by providing insulating paper 6. Similarly, by increasing the overlapping area, stray inductance can be reduced and electromagnetic performance can be improved. The mutually perpendicular outer ends 412 can be conveniently connected to an external counterpart (not shown).

[0052] like Figure 4 and Figure 7 As shown, the AC inner part 52 of the AC terminal 5 of the second busbar 2 includes a connection vertical plate 521 located at the front side of the capacitor core 20, the lower end of the connection vertical plate 521 is connected to the front end side 31 of the main body connection bar 3 of the second busbar 2, and the upper end is connected to the AC outer part 51 of the AC terminal 5 of the second busbar 2; the main body of the DC inner part 42 of the DC terminal 4 of the second busbar 2 is insulated from the front side of the connection vertical plate 521 and the bottom side of the main body connection bar 3 of the second busbar 2. Similarly, the overlapping area can be increased, the stray inductance can be reduced, and the electromagnetic performance can be improved.

[0053] like Figure 3 and Figure 4 As shown, in this embodiment, insulating paper 6 is arranged between the AC inner part 52 of the first busbar 1 and the AC inner part 52 of the AC terminal 5 of the second busbar 2; insulating paper 6 is also arranged between the DC inner part 42 of the DC terminal 4 of the first busbar 1 and the DC inner part 42 of the DC terminal 4 of the second busbar 2.

[0054] like Figure 7 and Figure 8 As shown, the AC outer part 51 of the AC terminal 5 of the first busbar 1 and the second busbar 2 of the busbar structure 10 includes a plurality of sub-AC terminals 511, and each sub-AC terminal 511 and the DC outer part 41 of the DC terminal 4 are horizontally spaced apart from each other to achieve physical insulation; at the same time, each sub-AC terminal 511 of the first busbar 1 and each sub-AC terminal 511 of the second busbar 2 are staggered to facilitate external connection to the counterpart.

[0055] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0056] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0057] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0058] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" 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, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. A capacitor, characterized in that: Including busbar structure; The busbar structure comprises a first busbar and a second busbar, each of the first busbar and the second busbar having a main connecting bar for connecting the capacitor core, and a DC terminal and an AC terminal connected to the main connecting bar; The AC outer portion of the AC terminal and the DC outer portion of the DC terminal both extend out of the capacitor and are located at the same side of the capacitor with a horizontal spacing therebetween; The AC inner side of the AC terminal is connected to the proximal side of the main body connection bar close to the AC outer side, and the DC inner side of the DC terminal is connected to the distal side of the main body connection bar away from the DC outer side.

2. A capacitor according to claim 1, characterized in that: Also included is a capacitor core; The main connecting bars of the first busbar and the second busbar are respectively arranged to be connected to the upper and lower surfaces of the capacitor core; The AC inner side of the first busbar is connected to the front end side of the main body connecting bar of the first busbar, and the DC inner side of the first busbar bypasses the front side, bottom side and rear side of the capacitor core and is connected to the rear end side of the main body connecting bar of the first busbar; The AC inner side of the second busbar is connected to the front end side of the main connecting bar of the second busbar, and the DC inner side of the second busbar bypasses the front side and bottom side of the capacitor core and is connected to the rear end side of the main connecting bar of the second busbar.

3. A capacitor according to claim 2, characterized in that: The DC inner part of the first busbar and the DC inner part of the second busbar partially overlap each other, and are insulated from each other.

4. A capacitor according to claim 3, characterized in that: The inner ends of the DC outer portion of the first busbar and the DC outer portion of the second busbar overlap with each other, while the outer ends are perpendicular to each other, and the overlapping portions are insulated from each other.

5. A capacitor according to claim 2, characterized in that: The AC inner side of the second busbar includes a connecting vertical plate located on the front side of the capacitor core, the lower end of the connecting vertical plate is connected to the front end side of the main connecting bar of the second busbar, and the upper end is connected to the AC outer side of the second busbar; the main body of the DC inner side of the second busbar is insulated from the front side of the connecting vertical plate and the bottom side of the main connecting bar of the second busbar.

6. A capacitor according to claim 2, characterized in that: Insulation paper is arranged between the AC inner part of the first busbar and the AC inner part of the second busbar; and insulation paper is arranged between the DC inner part of the first busbar and the DC inner part of the second busbar.

7. A capacitor according to claim 2, characterized in that: The capacitor core is multiple.

8. A capacitor according to claim 2, characterized in that: It also includes a shell; the capacitor core and the main body of the busbar structure are located in the shell, the AC outer side of the AC terminal and the DC outer side of the DC terminal both extend out of the shell; and the shell is filled with potting material for sealing.

9. A capacitor according to claim 1, characterized in that: The AC outer portion of the AC terminal includes a plurality of sub-AC terminals, and each sub-AC terminal and the DC outer portion of the DC terminal are horizontally spaced apart from each other; meanwhile, each sub-AC terminal of the first busbar and each sub-AC terminal of the second busbar are staggered with each other.

10. A capacitor according to claim 1, characterized in that: The main body connecting bar is a copper bar structure.

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