A capacitor

Abstract

The present invention provides a capacitor, which relates to the technical field of low-voltage reactive power compensation equipment and solves the technical problems of small capacitor capacity and poor ability to withstand large currents. The capacitor includes a copper bar bus and a capacitor element. The copper bar bus is used to connect to a power source. The capacitor element forms a single-phase output, three-phase or multi-phase output through the copper bar bus. The copper bar bus is made of tinned T2 copper material. It also includes a housing, lead terminals, insulating columns, fixing blocks and filling materials. The present invention uses a copper bar bus as a conductor, which has high conductivity and can reduce losses. The thickened bus bar can carry a larger current. The internal capacitor element is made into a standard plug-in structure, which can be directly plugged and welded with the copper bar bus. The element voltage can be downward compatible. By using the method of combining a bus bar with small capacitors, it can withstand a larger current and bus bar harmonics, and the product has a longer service life and lower cost.

Description

Technical Field

[0001] The present invention relates to the technical field of low - voltage reactive power compensation equipment, and particularly to a capacitor. Background Art

[0002] Capacitors are mainly used for low - voltage reactive power compensation, and are used in power distribution facilities such as factories and shopping malls to play a role in power factor correction. They can also be used for three - phase filtering of inverter output and are used in fields such as frequency converters and photovoltaics.

[0003] The existing capacitor designs are divided into two types:

[0004] Single - phase structure: One capacitor core, using electronic wire or bare copper wire as a conductor to connect and form a large capacitor core and then encapsulate it into a capacitor. Or, multiple capacitor cores use electronic wire or bare copper wire as conductors to be connected in parallel to form a large capacitor core and then encapsulate it into a capacitor;

[0005] Three - phase structure: Three capacitor cores, with two poles connected in sequence to form a △ structure, and the three corners are the three - phase lead - out points, and the three sides are the three capacitors.

[0006] The applicant of the present invention has found that the prior art has at least the following technical problems:

[0007] The existing capacitor designs use electronic wire or bare copper wire as connecting wires. Not only is the capacitor capacity limited and it is impossible to produce large - capacity capacitors, but also the ability to withstand large currents is poor. Summary of the Invention

[0008] The purpose of the present invention is to provide a capacitor to solve the technical problems of small capacitor capacity and poor ability to withstand large currents existing in the prior art.

[0009] To achieve the above - mentioned purpose, the present invention provides the following technical solutions:

[0010] A capacitor provided by the present invention includes copper - row busbars and capacitor elements. The copper - row busbars are used to connect to a power source; the capacitor elements form single - phase output, three - phase or multi - phase output through the copper - row busbars.

[0011] As a further improvement of the present invention, the copper - row busbars are made of tinned T2 copper material.

[0012] As a further improvement of the present invention, there are three copper - row busbars, which are used to correspondingly connect to the A, B, and C phases of three - phase electricity; there are three groups of capacitor elements, which form a delta connection through the three copper - row busbars, so that each of the copper - row busbars is respectively connected to one pin of two of the groups of capacitor elements.

[0013] As a further improvement of the present invention, the three copper busbars include a phase A busbar, a phase B busbar, and a phase C busbar. The phase A busbar and the phase C busbar are arranged in mirror symmetry, and the phase B busbar is arranged between the phase A busbar and the phase C busbar; the three groups of capacitor elements are divided into two rows and are inserted and welded to the copper busbars.

[0014] As a further improvement of the present invention, the number of capacitor elements in each group is at least one.

[0015] As a further improvement of the present invention, the phase A busbar includes a first body, an extension part, and a first split part. The first body is a long strip structure. The extension parts are formed by extending from both ends of the first body to one side. The first split part is parallel to the first body and is connected to the end of the extension part; the phase B busbar includes a second body and a second split part. The second body is a long strip structure. The number of the second split parts is an even number and is formed by extending outward along both sides of the second split part. A plurality of through holes for inserting the pins of the capacitor elements are arranged at intervals on the first body, the first split part, and the second split part. Connecting ends for connecting to the lead terminals are arranged in the middle of the first body and the second body.

[0016] As a further improvement of the present invention, it further includes a housing, lead terminals, and a filling material. After the three copper busbars are connected to the three groups of capacitor elements, they are folded in half and placed into the inner cavity of the housing. The number of the lead terminals is three. One end of each lead terminal is respectively connected to the three copper busbars, and the other end passes through the housing; the filling material is filled in the inner cavity of the housing.

[0017] As a further improvement of the present invention, it further includes insulating columns. The lead terminals are arranged inside the insulating columns, and the insulating columns are arranged through the top of the housing to insulate the lead terminals from the housing.

[0018] As a further improvement of the present invention, it further includes positioning blocks. The lower ends of the positioning blocks are sleeved outside the three copper busbars, and the upper ends are sleeved outside the insulating columns.

[0019] As a further improvement of the present invention, a positioning boss is arranged at the top of the insulating column, and the diameter of the positioning boss is equal to the diameter of the through hole at the top of the housing.

[0020] As a further improvement of the present invention, the housing includes a housing body and a cover detachably covered on the top of the housing body. A through hole for the insulating column to pass through is arranged on the cover; the housing is made of galvanized iron sheet and painted.

[0021] The present invention has the following beneficial effects compared with the prior art:

[0022] The capacitor provided by the present invention uses a copper busbar as the wire according to the required current drawing. Since the copper busbar has high conductivity, it can reduce energy consumption. Also, due to the large thickness of the copper busbar, it can carry a larger current. Further, a T2 copper busbar formed by laser cutting and then tin-plated is used to further improve the conductivity and reduce losses. The internal capacitor elements are made into a standard plug-in structure, which can be directly plugged and welded with the copper busbar. The element voltage can be downward compatible. The shell is made of galvanized iron sheet sprayed with paint. The low-cost shell increases the diversity at the same time. It can be welded according to different sizes of sheet metal without a casting mold. The method of combining the busbar with small capacitors can withstand a larger current and busbar harmonics, and the product has a longer lifespan and lower cost. The capacitor provided by the present invention can be assembled into single-phase, three-phase and other multi-phase capacitors or multi-capacitance value capacitors according to different requirements. The capacitor of the present invention only needs to change the corresponding copper busbar according to the customer's usage requirements to assemble the required product. The shell and the internal capacitor elements only need to distinguish several major categories without adding too many refined specifications to increase the risk of production dead stock. The general production can increase production efficiency. The design of the copper busbar with a large current can improve the overload resistance of the product. The combination method of multiple capacitor elements can improve the heat dissipation ability of the product and reduce the heat generation, thereby increasing the lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a three-dimensional structural schematic diagram after the capacitor element in the capacitor of the present invention is connected to the copper busbar;

[0025] Figure 2 It is the front view after the capacitor element in the capacitor of the present invention is connected to the copper busbar;

[0026] Figure 3 It is a layout diagram of three copper busbars in an embodiment of the capacitor of the present invention;

[0027] Figure 4 It is the top view of three copper busbars in an embodiment of the capacitor of the present invention;

[0028] Figure 5 It is a perspective view when the capacitor of the present invention is viewed from the front;

[0029] Figure 6 It is a three-dimensional structural schematic diagram after the shell of the capacitor of the present invention is removed.

[0030] In the figure: 1. Capacitor element; 2. Row A; 3. Row B; 4. Row C; 5. Pin insertion opening; 6. Lead terminal; 7. Connection end part; 8. Outer shell; 9. Filling material; 10. Insulating column; 11. Positioning boss; 12. Positioning block; 13. Shell body; 14. Cover. Detailed implementation mode

[0031] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope protected by the present invention.

[0032] The present invention provides a capacitor, including a copper busbar and a capacitor element 1. The copper busbar is used to connect to a power source; the capacitor element 1 forms a single-phase output, three-phase or multi-phase output through the copper busbar.

[0033] Specifically, the number of output phases formed is determined by the wiring method between the capacitor element 1 and the copper busbar. When a single-phase output is required, two copper busbars are set, and then the two pins of the capacitor element 1 are respectively connected to the two copper busbars to form a single-phase output;

[0034] When a non-standard output mode such as a four-phase output is required, four or more copper busbars are correspondingly set, and then the capacitor element 1 is divided into four groups or more groups and connected to the copper busbars to form a four-phase or multi-phase output mode;

[0035] It should be noted that the copper busbar is made of tinned T2 copper material. Further, the copper busbar is a tinned T2 copper busbar formed by laser cutting. The T2 copper busbar has a high conductivity, which can reduce losses. Since the copper busbar is a sheet structure and is thicker than both electronic wires and bare copper wires, a larger current can pass through the thickened busbar, thereby improving the over-current carrying capacity of the capacitor.

[0036] The following takes the three-phase output of the capacitor as an example for specific description:

[0037] Embodiment 1:

[0038] As Figure 1 shown, in this embodiment, there are three copper busbars, which are used to correspondingly connect to the A, B, and C phases of the three-phase power; there are three groups of capacitor elements 1, which form a delta connection through the three copper busbars, so that each copper busbar is respectively connected to one pin of two of the groups of capacitor elements 1.

[0039] As Figure 3 and Figure 4As shown, the three copper busbars include phase A busbar 2, phase B busbar 3, and phase C busbar 4. Phase A busbar 2 is used to connect to phase A of the power supply, phase B busbar 3 is used to connect to phase B of the power supply, and phase C busbar 4 is used to connect to phase C of the power supply; phase A busbar 2 and phase C busbar 4 are arranged in mirror symmetry, and phase B busbar 3 is arranged between phase A busbar 2 and phase C busbar 3; the three groups of capacitor elements 1 are arranged in two rows and are inserted and welded to the copper busbar.

[0040] Furthermore, the number of each group of capacitor elements 1 is at least one.

[0041] As Figure 1 and Figure 2 shown, taking the number of capacitor elements 1 being 24 as an example for specific illustration, the 24 capacitor elements 1 are arranged in two rows side by side, and 6 capacitor elements 1 in the same row are taken as a group. The two groups of capacitor elements 1 in the same row are separately arranged with a relatively large gap in the middle, and the capacitor elements 1 in the same group are arranged closely. Each capacitor element 1 has two pins arranged side by side.

[0042] After arranging the 24 capacitor elements 1 in two rows, 4 rows of pins are formed and arranged side by side.

[0043] In this embodiment, phase A busbar 2 includes a first body, an extension part, and a first split part. The first body is a long strip structure. The extension part extends from both ends of the first body to one side. The first split part is parallel to the first body and is connected to the end of the extension part; phase B busbar includes a second body and a second split part. The second body is a long strip structure. The number of the second split parts is an even number and extends outward along both sides of the second split part. A plurality of insertion holes 5 for inserting the pins of the capacitor elements 1 are arranged at intervals on the first body, the first split part, and the second split part. Connecting ends 7 connected to the lead-out terminals 6 are arranged in the middle of the first body and the second body.

[0044] Specifically, the length of the first body is equal to or greater than the pin distance between the outermost capacitor elements 1 among the 12 capacitor elements 1 in one row. The extension part is located between the two farthest capacitor elements 1. The length of the first split part is equal to or greater than the pin distance between two capacitor elements 1. The length of the second body is equal to or greater than the pin distance of eight capacitor elements 1.

[0045] Furthermore, two insertion holes 5 are arranged on the first split part for connecting the pins of the two farthest capacitor elements 1, that is, the inserts.

[0046] The insertion hole 5 is a strip-shaped hole extending inward from the edge of the first body, the second body, or the second split part.

[0047] The connecting end 7 is a circular through hole.

[0048] As Figure 5As shown, as an alternative embodiment of the present invention, it further includes a housing 8, lead terminals 6, and a filling material 9. After the three copper busbars are connected to the three groups of capacitor elements 1, they are folded in half and placed into the inner cavity of the housing 8. The number of lead terminals 6 is three, one end is respectively connected to the three copper busbars, and the other end passes through the housing 8; the filling material 9 is filled in the inner cavity of the housing 8 to completely fill the internal voids.

[0049] It further includes insulating columns 10. The lead terminals 6 are inserted into the insulating columns 10, and the insulating columns 10 are inserted through the top of the housing 8 to insulate the lead terminals 6 from the housing 8.

[0050] Furthermore, a positioning boss 11 is provided at the top of the insulating column 10, and the diameter of the positioning boss 11 is equal to the diameter of the perforation at the top of the housing 8.

[0051] As an alternative embodiment of the present invention, it further includes a positioning block 12. The lower end of the positioning block 12 is sleeved outside the three copper busbars, and the upper end is sleeved outside the insulating column 10.

[0052] Furthermore, the housing 8 includes a housing body 13 and a cover 14 detachably covered on the top of the housing body 13. A perforation for the insulating column 10 to pass through is provided on the cover 14; the housing 8 is made of galvanized iron sheet and painted.

[0053] Specifically, it should be noted that the housing body 13 and the cover 14 are detachably connected by blind rivets.

[0054] Specifically, the filling material 9 is vermiculite.

[0055] Assembly method:

[0056] As Figure 6 shown, take out the capacitor elements 1 required for the design, and place the capacitor elements 1 according to the designed circuit; insert and connect the cut copper busbars with the capacitor elements 1. The insertion pieces of the capacitor elements 1, that is, the pins, are connected to the corresponding grooves of the copper busbars, that is, the through-foot openings, and then soldering is carried out. Electric soldering iron soldering or wave soldering can be used for soldering. Fold the formed capacitor group in half, and then connect it to the lead terminals 6 of the positioning block 12. After preparing the housing 8 material, install the semi-finished product assembled inside into the housing, reinforce the corresponding positions with nuts, and then fill the inside with the insulating material vermiculite. The main function is to fill the voids between the capacitor elements 1 inside the housing 8, prevent the product from shaking, reduce vibration, absorb the oil leakage substances after the capacitor elements 1 fail, and avoid external contamination. After filling the vermiculite, install the cover 14, and then install the insulating columns 10. The cover 14 is fixedly encapsulated with the bottom housing body 13 by blind rivets or welding.

[0057] In the present invention, a large capacitor is disassembled into a plurality of small capacitor elements 1 for combination, and each small capacitor element 1 has an independent explosion-proof ability. The copper busbar in the present invention is equivalent to a wire, but the copper busbar can be customized and processed integrally according to the shape. The copper busbar is generally made of materials with good electrical conductivity such as T2 purple copper or brass. In the present invention, a large capacitor is formed by combining a plurality of elements with independent explosion-proof designs. The failure of one small capacitor does not affect the operation of the overall capacitor.

[0058] First of all, it should be noted here that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0060] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. 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.

[0062] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0063] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A capacitor, characterized in that, It includes copper busbars and capacitor elements. The copper busbars are used to connect to a power source; the capacitor elements form a single-phase output or a multi-phase output through the copper busbars. When there are three copper busbars, they are used to correspondingly connect to the A, B, and C phases of a three-phase power supply; there are three groups of capacitor elements, which form a delta connection through the three copper busbars, so that each of the copper busbars is respectively connected to a pin of two of the groups of capacitor elements. The three copper busbars include an A row, a B row, and a C row. The A row and the C row are arranged in mirror symmetry, and the B row is arranged between the A row and the C row; the three groups of capacitor elements are arranged in two rows and are inserted and welded to the copper busbars. The A row or the C row includes a first body, an extension part, and a first split part. The first body is a long strip structure. The extension part extends from both ends of the first body to one side. The first split part is parallel to the first body and is connected to the end of the extension part; the B row includes a second body and a second split part. The second body is a long strip structure. The number of the second split parts is an even number and extends outward along both sides of the second split part. A plurality of through holes for inserting the pins of the capacitor elements are arranged at intervals on the first body, the first split part, and the second split part. Connecting ends for connecting to the lead terminals are arranged in the middle of the first body and the second body.

2. The capacitor according to claim 1, characterized in that, The copper busbars are made of tinned T2 copper material.

3. The capacitor according to claim 1, wherein The number of each group of capacitor elements is at least one.

4. The capacitor according to claim 1, wherein It also includes a housing, lead terminals, and a filling material. After the three copper busbars are connected to the three groups of capacitor elements, they are folded and placed into the inner cavity of the housing. The number of the lead terminals is three. One end of each lead terminal is respectively connected to the three copper busbars, and the other end passes through the housing; the filling material is filled in the inner cavity of the housing.

5. The capacitor according to claim 4, wherein It also includes insulating columns. The lead terminals are arranged inside the insulating columns, and the insulating columns are arranged on the top of the housing to insulate the lead terminals from the housing.

6. The capacitor according to claim 5, characterized in that, It also includes positioning blocks. The lower ends of the positioning blocks are sleeved outside the three copper busbars, and the upper ends are sleeved outside the insulating columns.

7. The capacitor according to claim 5, characterized in that, The housing includes a housing body and a cover detachably covered on the top of the housing body. A through hole for the insulating column to pass through is arranged on the cover; the housing is made of galvanized iron sheet and painted.

Images