Lead structure and three-dimensional wound core transformer

Abstract

The present invention discloses a lead structure and a three-dimensional wound core transformer. When the lead structure and the three-dimensional wound core transformer are in use, the first copper busbar assembly is used to be arranged above the core column, all first wiring parts and all second wiring parts are extended in the vertical direction toward the core column, and the head end of the first valve side coil and the tail end of the first valve side coil are conveniently connected to the first wiring part and the second wiring part. The second copper busbar assembly is used to be arranged below the core column, all third wiring parts and all fourth wiring parts are extended in the vertical direction toward the core column, and the third wiring part and the fourth wiring part are conveniently connected to the head end of the second valve side coil and the tail end of the second valve side coil. All first terminal blocks are extended in the vertical direction away from the core column, and all second terminal blocks are located on the same side of the three-dimensional wound core transformer, so that the first terminal blocks and the second terminal blocks are conveniently connected to external equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a lead structure and a three-dimensional wound core transformer. Background Art

[0002] Three-dimensional wound-core dry-type traction rectifier transformers significantly improve energy efficiency and ensure greater operational stability, contributing to the green development of urban rail transit and thus ensuring its safe operation. Furthermore, these transformers offer low no-load and load losses, as well as low no-load current, reducing energy losses and offering significant economic benefits. Furthermore, these significantly reduced losses contribute to reduced carbon dioxide and sulfur dioxide emissions, offering significant social benefits.

[0003] However, when the conventional three-dimensional wound iron core dry-type traction rectifier transformer is in use, the connection terminals and lead structures of the coils are inconvenient to install, which makes the assembly of the three-dimensional wound iron core dry-type traction rectifier transformer relatively complicated. Summary of the Invention

[0004] Based on this, in order to solve the problem that the coil terminals and lead structures of the traditional three-dimensional wound iron core dry-type traction rectifier transformer are inconvenient to install when in use, resulting in the cumbersome assembly of the three-dimensional wound iron core dry-type traction rectifier transformer, a lead structure and a three-dimensional wound iron core transformer are proposed. The lead structure and the coil terminals and lead structure of the three-dimensional wound iron core transformer are easy to install, thereby improving the assembly efficiency of the three-dimensional wound iron core transformer.

[0005] The specific technical solutions are as follows:

[0006] In one aspect, the present application relates to a lead structure for use in a three-dimensional wound core transformer, wherein the three-dimensional wound core transformer includes a first valve-side coil and a second valve-side coil spaced apart along a core leg of the transformer, including:

[0007] a first copper busbar assembly, the first copper busbar assembly comprising three first connection portions for connecting to the head ends of the three valve-side first coils and three second connection portions for connecting to the tail ends of the three valve-side first coils, the three valve-side first coils being connected via the first copper busbar assembly in a star connection method; the first copper busbar assembly is further provided with three first connection terminals; the first copper busbar assembly is used to be arranged above the core leg, all the first connection portions and all the second connection portions are extended in a vertical direction toward the core leg, and all the first connection terminals are extended in a vertical direction away from the core leg and are located on the same side of the three-dimensional wound core transformer; and

[0008] The second copper busbar assembly includes three third wiring parts for connecting to the head ends of the three valve-side second coils and three fourth wiring parts for connecting to the tail ends of the three valve-side second coils. The three valve-side second coils are connected through the second copper busbar assembly using a triangle wiring method; the second copper busbar assembly is also provided with three second wiring terminals; the second copper busbar assembly is used to be arranged below the iron core column, all the third wiring parts, all the fourth wiring parts and all the second wiring terminals are extended in the vertical direction toward the iron core column, and all the second wiring terminals are located on the same side of the three-dimensional wound core transformer.

[0009] The technical solution is further described below:

[0010] In one embodiment, the first copper bar assembly includes a first copper bar, a second copper bar, and a third copper bar, the first copper bar includes a first wiring segment and a second wiring segment, the second copper bar includes a third wiring segment and a fourth wiring segment, and the third copper bar includes a fifth wiring segment and a sixth wiring segment;

[0011] One end of the first wiring segment is provided with a first connecting portion, one end of the third wiring segment is provided with a second connecting portion, and one end of the fifth wiring segment is provided with the third connecting portion. The other end of the first wiring segment, the other end of the third wiring segment, and one end of the fifth wiring segment are each provided with a first wiring portion; one end of the second wiring segment, one end of the fourth wiring segment, and one end of the sixth wiring segment are each provided with a second wiring portion, and the other end of the second wiring segment, the other end of the fourth wiring segment, and the other end of the sixth wiring segment are each provided with a first wiring terminal. The first connecting portion, the second connecting portion, and the third connecting portion are connected to each other.

[0012] In one embodiment, the first wiring segment includes a first wiring body and a second wiring body disposed at an angle and connected to each other, the third wiring segment includes a third wiring body and a fourth wiring body disposed at an angle and connected to each other, and the fifth wiring segment includes a fifth wiring body and a sixth wiring body disposed at an angle and connected to each other;

[0013] Among them, one end of the first wiring body is provided with the first connecting portion, one end of the third wiring body is provided with the second connecting portion, and one end of the fifth wiring body is provided with the third connecting portion, and the other end of the second wiring body, the other end of the fourth wiring body and the other end of the sixth wiring body are all extended in the vertical direction toward the iron core column and are all provided with the first connecting portion.

[0014] In one embodiment, the second copper bar assembly includes a fourth copper bar, a fifth copper bar, and a sixth copper bar;

[0015] The fourth copper bar is provided with a third connection portion for connecting to the head end of the second coil on the first valve side and a fourth connection portion for connecting to the tail end of the second coil on the second valve side;

[0016] The fifth copper bar is provided with a fourth connection portion for connecting to the tail end of the second coil on the first valve side and a third connection portion for connecting to the head end of the second coil on the third valve side;

[0017] One end of the sixth copper bar is provided with a third connection portion for connecting to the head end of the second valve side second coil and a fourth connection portion for connecting to the tail end of the third valve side second coil;

[0018] The other end of the fourth copper bar, the other end of the fifth copper bar and the other end of the sixth copper bar are each provided with a second connecting terminal.

[0019] In one embodiment, the fifth copper busbar includes a seventh wiring body and an eighth wiring body, the eighth wiring body includes a first split body and a second split body arranged at an angle and connected to each other, the first split body is provided with a first wiring terminal, the second split body is connected to the seventh wiring body, the first split body, the second split body and the seventh wiring body are surrounded to form an installation space, and the other end of the fourth copper busbar is passed through the installation space; the seventh wiring body is provided with a fourth wiring portion for connecting to the tail end of the second coil on the first valve side and a third wiring portion for connecting to the head end of the second coil on the third valve side.

[0020] In one embodiment, the other end of the fourth copper bar, the other end of the first split body and the other end of the sixth copper bar are all located on the same side of the seventh wiring body, the other end of the fourth copper bar is connected to the side of the seventh wiring body, the first split body is connected to the sixth copper bar, and the sixth copper bar is connected to the side of the seventh wiring body.

[0021] In one embodiment, the first split body and the seventh wiring body are arranged opposite to each other, and the first split body is connected to one side surface of the portion of the fourth copper busbar located in the installation space via an insulating member, and the seventh wiring body is connected to the other side surface opposite to the portion of the fourth copper busbar located in the installation space via another insulating member; or

[0022] The portion of the fourth copper busbar passing through the installation space is connected to the seventh wiring body through an insulating member.

[0023] On the other hand, the present application also relates to a three-dimensional wound core transformer, including the lead structure of any of the aforementioned embodiments; and also including three valve-side first coils, three valve-side second coils and an iron core, the iron core including three iron core columns, one valve-side first coil and one valve-side second coil correspondingly wound on one of the iron core columns, and the valve-side first coil and the valve-side second coil are arranged along the length direction of the iron core column.

[0024] The technical solution is further described below:

[0025] In one embodiment, the system further comprises three grid-side coils, one grid-side coil corresponding to one iron core leg, and one grid-side coil wound outside the first valve-side coil and the second valve-side coil;

[0026] One of the grid-side coils includes an upper triangle-connected coil, an upper phase-shifted coil, a lower phase-shifted coil, and a lower triangle-connected coil arranged along the length direction of the core leg;

[0027] The upper delta-connected coil and the upper phase-shifted coil are connected in series to form an upper coil;

[0028] The lower delta-connected coil and the lower phase-shifted coil are connected in series to form the lower coil;

[0029] The three upper coils are connected via grid-side coil leads using a triangle connection method, and the three lower coils are connected via grid-side coil leads using a triangle connection method. The upper coils are connected in parallel with the lower coils.

[0030] In one embodiment, it further includes a clamping structure, which includes a first clamping seat and a second clamping seat, and the iron core is clamped between the first clamping seat and the second clamping seat; the first copper busbar assembly is connected to the first clamping seat, and the second copper busbar assembly is connected to the second clamping seat.

[0031] When the lead structure and three-dimensional wound core transformer are in use, the first copper busbar assembly is positioned above the core leg, with all first and second connection portions extending vertically toward the core leg. The leading end and trailing end of the valve-side first coil are conveniently connected to the three first and third second connection portions. Furthermore, the second copper busbar assembly is positioned below the core leg, with all third and fourth connection portions extending vertically toward the core leg. This facilitates connection between the three third and fourth connection portions and the leading and trailing ends of the three valve-side second coils. Furthermore, all the first connecting terminals are extended in the vertical direction away from the core column and are located on the same side of the three-dimensional wound core transformer, and all the second connecting terminals are extended in the vertical direction toward the core column, and all the second connecting terminals are located on the same side of the three-dimensional wound core transformer. In this way, the first connecting terminals and the second connecting terminals are conveniently connected to external equipment, thereby improving the assembly efficiency of the three-dimensional wound core transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn to true scale.

[0035] Figure 1 A schematic structural diagram of a three-dimensional wound core transformer from one perspective according to an embodiment;

[0036] Figure 2 A schematic structural diagram of a three-dimensional wound core transformer from another perspective according to an embodiment;

[0037] Figure 3 is a schematic diagram of a transformer structure according to an embodiment;

[0038] Figure 4 This is a schematic structural diagram of a first copper busbar assembly according to an embodiment;

[0039] Figure 5 This is a schematic structural diagram of a second copper busbar assembly according to an embodiment;

[0040] Figure 6 A schematic diagram of one perspective of the first copper busbar assembly and the first clamping seat after assembly according to one embodiment;

[0041] Figure 7 A schematic diagram of another perspective of the first copper busbar assembly and the first clamping seat after being assembled in one embodiment;

[0042] Figure 8 A schematic diagram of one perspective of the second copper busbar assembly and the second clamping base after assembly according to one embodiment;

[0043] Figure 9 A schematic diagram of another perspective of the second copper busbar assembly and the second clamping seat after being assembled in one embodiment;

[0044] Figure 10 is a schematic diagram of a clamping structure according to an embodiment from one perspective;

[0045] Figure 11 is a schematic diagram of a clamping structure of an embodiment from another perspective;

[0046] Figure 12 Schematic diagram of the connection of the grid-side coil in one embodiment.

[0047] Description of reference numerals:

[0048] 10. Three-dimensional wound core transformer; 20. Lead structure; 100. First copper busbar assembly; 110. First copper busbar; 112. First connection segment; 1122. First connecting portion; 114. Second connection segment; 120. Second copper busbar; 122. Third connection segment; 1222. Second connecting portion; 124. Fourth connection segment; 130. Third copper busbar; 132. Fifth connection segment; 1322. Third connecting portion; 134. Sixth connection segment; 140. First connecting portion; 150. Second connecting portion; 160. First terminal; 200. Second copper busbar assembly; 210. Fourth copper busbar; 220. Fifth copper busbar; 222. Seventh connecting body; 224. Eighth connecting body; 2242. First sub-body; 2244. Second sub-body; 2246. Installation space; 230. Sixth copper busbar ; 240, the third wiring part; 250, the fourth wiring part; 260, the second wiring terminal; 300, the grid-side coil; 310, the upper coil; 312, the upper triangle-connected coil; 314, the upper phase-shifting coil; 320, the lower coil; 322, the lower triangle-connected coil; 324, the lower phase-shifting coil; 326, the gear shift switch; 20, the clamping structure; 410, the first clamping seat; 412, the mounting body; 414, the flange; 416, the mounting bracket; 420, the second clamping seat; 422, the support body; 430, the accommodating space; 440, the tensioning member; 442, the screw; 444, the first nut; 446, the second nut; 448, the third nut; 510, the first pressure block; 520, the second pressure block; 600, the support seat; 30, the iron core; 700, the iron core column. DETAILED DESCRIPTION

[0049] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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 understood as limiting the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In order to address the problem that the coil terminals and lead structures of traditional three-dimensional wound core dry-type traction rectifier transformers are inconvenient to install during use, resulting in the cumbersome assembly of the three-dimensional wound core dry-type traction rectifier transformer, the present application proposes a lead structure 20 and a three-dimensional wound core transformer 10. The coil terminals and lead structure 20 of the lead structure 20 and the three-dimensional wound core transformer 10 are easy to install, thereby improving the assembly efficiency of the three-dimensional wound core transformer 10.

[0053] Please refer to Figures 1 to 3 In one embodiment, the three-dimensional wound core transformer 10 includes an iron core 30 and a coil structure (not shown), wherein the iron core 30 includes three iron core legs 700, and the coil structure includes three valve-side first coils (not shown) and three valve-side second coils (not shown). One valve-side first coil and one valve-side second coil are respectively wound on one iron core leg 700, and the valve-side first coil and the valve-side second coil are arranged along the length direction of the iron core leg 700, and the valve-side first coil is arranged above the valve-side second coil. Please refer to Figure 3 The length direction of the core leg 700 is F. The material of the core 30 can be silicon steel or amorphous alloy.

[0054] Please refer to Figure 1 、 Figure 4 and Figure 5 The three-dimensional wound core transformer 10 also includes a lead structure 20, which includes a first copper busbar assembly 100 and a second copper busbar assembly 200. The first copper busbar assembly 100 includes three first connection portions 140 for connecting to the head ends of the three valve-side first coils and three second connection portions 150 for connecting to the tail ends of the three valve-side first coils. The three valve-side first coils are connected in a star connection via the first copper busbar assembly 100.

[0055] Please refer to Figure 1 and Figure 4The first copper busbar assembly 100 is configured to be positioned above the core leg 700 and is further provided with three first connecting terminals 160. All first connecting portions 140 and all second connecting portions 150 extend vertically toward the core leg 700. All first connecting terminals 160 extend vertically away from the core leg 700 and are located on the same side of the three-dimensional wound core transformer 10. The first connecting terminals 160 are used to connect to external devices.

[0056] Please refer to Figure 1 and Figure 5 The lead structure 20 also includes a second copper busbar assembly 200, which is used to be arranged below the iron core column 700. The second copper busbar assembly 200 includes three third wiring parts 240 for connecting to the head ends of the three valve-side second coils and three fourth wiring parts 250 for connecting to the tail ends of the three valve-side second coils. The three valve-side second coils are connected through the second copper busbar assembly 200 using a triangle wiring method.

[0057] Please refer to Figure 1 and Figure 5 The second copper busbar assembly 200 is also provided with three second connecting terminals 260. All third connecting parts 240, all fourth connecting parts 250 and all second connecting terminals 260 are extended in the vertical direction toward the core column 700, and all second connecting terminals 260 are located on the same side of the three-dimensional wound core transformer 10.

[0058] When the lead structure 20 and the three-dimensional wound core transformer 10 are in use, the first copper busbar assembly 100 is disposed above the core leg 700, with all first connecting portions 140 and all second connecting portions 150 extending vertically toward the core leg 700. The head end and tail end of the valve-side first coil are conveniently connected to the three first connecting portions 140 and three second connecting portions 150. Furthermore, the second copper busbar assembly 200 is disposed below the core leg 700, with all third connecting portions 240 and all fourth connecting portions 250 extending vertically toward the core leg 700. This facilitates connection between the three third connecting portions 240 and three fourth connecting portions 250 and the head ends and tail ends of the three valve-side second coils. Furthermore, all first connecting terminals 160 are extended in the vertical direction away from the core column 700 and are located on the same side of the three-dimensional wound core transformer 10, and all second connecting terminals 260 are extended in the vertical direction toward the core column 700, and all second connecting terminals 260 are located on the same side of the three-dimensional wound core transformer 10. In this way, it is convenient to connect the first connecting terminals 160 and the second connecting terminals 260 with external equipment, thereby improving the assembly efficiency of the three-dimensional wound core transformer 10.

[0059] Please refer to Figure 4 Specifically, in one embodiment, the first copper busbar assembly 100 includes a first copper busbar 110, a second copper busbar 120, and a third copper busbar 130. The first copper busbar 110 includes a first wiring segment 112 and a second wiring segment 114. The second copper busbar 120 includes a third wiring segment 122 and a fourth wiring segment 124. The third copper busbar 130 includes a fifth wiring segment 132 and a sixth wiring segment 134.

[0060] Please refer to Figure 6 and Figure 7 The first wiring segment 112 and the second wiring segment 114 are both insulated and connected to the first clamping seat 410 through an insulating member. The fifth wiring segment 132 and the sixth wiring segment 134 are connected to each other through an insulating member.

[0061] One end of first wiring segment 112 is provided with a first connecting portion 1122, one end of third wiring segment 122 is provided with a second connecting portion 1222, and one end of fifth wiring segment 132 is provided with a third connecting portion 1322. The other ends of first wiring segment 112, third wiring segment 122, and fifth wiring segment 132 are each provided with a first connecting portion 140. One end of second wiring segment 114, fourth wiring segment 124, and sixth wiring segment 134 are each provided with a second connecting portion 150. The other ends of second wiring segment 114, fourth wiring segment 124, and sixth wiring segment 134 are each provided with a first connecting terminal 160. First connecting portion 1122, second connecting portion 1222, and third connecting portion 1322 are interconnected.

[0062] Please refer to Figure 4 In some embodiments, the first wiring segment 112 includes a first wiring body and a second wiring body that are arranged at an angle and connected to each other, the third wiring segment 122 includes a third wiring body and a fourth wiring body that are arranged at an angle and connected to each other, and the fifth wiring segment 132 includes a fifth wiring body and a sixth wiring body that are arranged at an angle and connected to each other. The first wiring body has a first connecting portion 1122 at one end, a second connecting portion 1222 at one end, and a third connecting portion 1322 at one end of the fifth wiring body. The other ends of the second wiring body, the fourth wiring body, and the sixth wiring body all extend vertically toward the core leg 700 and are each provided with a first connecting portion 140. The angled arrangement of the first and second wiring bodies, the angled arrangement of the third and fourth wiring bodies, and the angled arrangement of the fifth and sixth wiring bodies facilitates interconnection of the first, third, and fifth wiring bodies. Furthermore, the second, fourth, and sixth wiring bodies all extend vertically toward the core leg 700 to facilitate connection to the valve-side first coil.

[0063] Please refer to Figure 4, this figure shows the specific wiring principle of the first copper busbar assembly 100 and the first coil on the valve side in one embodiment. In this embodiment, the first wiring portion 140 in the first wiring segment 112 can be connected to the beginning of the first valve side first coil, wherein the beginning of the first valve side first coil can be x1; the first wiring portion 140 in the third wiring segment 122 can be connected to the beginning of the second valve side first coil, wherein the beginning of the second valve side first coil can be y1; the first wiring portion 140 in the fifth wiring segment 132 can be connected to the beginning of the third valve side first coil, wherein the beginning of the third valve side first coil can be z1; the second wiring portion 150 of the second wiring segment 114 can be connected to the tail end of the first valve side first coil, wherein the tail end of the first valve side first coil can be a1; the second wiring portion 150 of the fourth wiring segment 124 can be connected to the tail end of the second valve side first coil, wherein the tail end of the second valve side first coil can be b1; the second wiring portion 150 of the sixth wiring segment 134 can be connected to the tail end of the third valve side first coil, wherein the tail end of the third valve side first coil can be c1. In this way, the three valve-side first coils are connected in a star connection method through the first copper busbar assembly.

[0064] Please refer to Figure 5 In some embodiments, the second copper bar assembly 200 includes a fourth copper bar 210, a fifth copper bar 220, and a sixth copper bar 230. The fourth copper bar 210 has a third connection portion 240 for connecting to the head end of the first valve-side second coil and a fourth connection portion 250 for connecting to the tail end of the second valve-side second coil. The fifth copper bar 220 has a fourth connection portion 250 for connecting to the tail end of the first valve-side second coil and a third connection portion 240 for connecting to the head end of the third valve-side second coil. One end of the sixth copper bar 230 has a third connection portion 240 for connecting to the head end of the second valve-side second coil and a fourth connection portion 250 for connecting to the tail end of the third valve-side second coil. The other ends of the fourth copper bar 210, the fifth copper bar 220, and the sixth copper bar 230 each have a second connection terminal 260. Thus, the three valve-side second coils are connected in a delta connection configuration via the second copper bar assembly.

[0065] Please refer to Figure 5Specifically, in one embodiment, the fifth copper busbar 220 includes a seventh wiring body 222 and an eighth wiring body 224. The eighth wiring body 224 includes a first sub-body 2242 and a second sub-body 2244 arranged at an angle and connected to each other. The first sub-body 2242 is provided with a second terminal 260. The second sub-body 2244 is connected to the seventh wiring body 222. The first sub-body 2242, the second sub-body 2244 and the seventh wiring body 222 are surrounded to form an installation space 2246. The other end of the fourth copper busbar 210 is passed through the installation space 2246. In this way, the second copper busbar assembly 200 is more compact in structure, thereby reducing the volume of the lead structure 20. Please refer to Figure 5 The seventh connecting body 222 is provided with a fourth connecting portion 250 for connecting to the tail end of the first valve-side second coil and a third connecting portion 240 for connecting to the head end of the third valve-side second coil.

[0066] Please refer to Figure 5 The other end of the fourth copper busbar 210, the other end of the first split body 2242, and the other end of the sixth copper busbar 230 are all located on the same side of the seventh wiring body 222. The other end of the fourth copper busbar 210 is connected to the side of the seventh wiring body 222, the first split body 2242 is connected to the sixth copper busbar 230, and the sixth copper busbar 230 is connected to the side of the seventh wiring body 222. Thus, the second terminal 260 on the sixth copper busbar 230, the second terminal 260 on the first split body 2242, and the second terminal 260 on the fourth copper busbar 210 are all located on the same side of the seventh wiring body 222.

[0067] Please refer to Figure 5 The first split body 2242 and the seventh wiring body 222 are arranged opposite to each other, and the first split body 2242 is connected to one side surface of the portion of the fourth copper busbar 210 located in the installation space 2246 through an insulating member, and the seventh wiring body 222 is connected to the other side surface opposite to the portion of the fourth copper busbar 210 located in the installation space 2246 through another insulating member.

[0068] Please refer to Figure 5 In some embodiments, the portion of the fourth copper busbar 210 passing through the installation space 2246 is connected to the seventh wiring body 222 through an insulating member.

[0069] Please refer to Figure 5 , this figure shows the specific wiring principle of the second copper busbar assembly 200 and the second coil on the valve side in one embodiment.

[0070] The first end of the second coil on the first valve side may be x2, which is connected to the third connection portion 240 provided on the fourth copper busbar 210 , and the second end of the first valve side coil may be a2, which is connected to the fourth connection portion 250 provided on the fifth copper busbar 220 .

[0071] The head end of the second valve side second coil can be y2, which is connected to the third wiring portion 240 set on the sixth copper busbar 230, and the tail end of the second valve side second coil can be b2, which is connected to the fourth wiring portion 250 set on the fourth copper busbar 210.

[0072] The head end of the second coil on the third valve side can be z2, which is connected to the third wiring portion 240 set on the fifth copper busbar 220, and the tail end of the second coil on the third valve side can be c2, which is connected to the fourth wiring portion 250 set on the sixth copper busbar 230.

[0073] Please refer to Figure 3 and Figure 12 On the basis of the above-mentioned embodiment, the lead structure 20 further includes three grid-side coils 300, one grid-side coil 300 corresponds to one iron core leg 700, and one grid-side coil 300 is wound outside the first valve-side coil and the second valve-side coil; one grid-side coil 300 includes an upper triangle-connected coil 312, an upper phase-shifting coil 314, a lower phase-shifting coil 324, and a lower triangle-connected coil 322 arranged along the length direction of the iron core leg 700; wherein, the upper triangle The triangle-connected coil 312 is connected in series with the upper phase-shifting coil 314 to form the upper coil 310; the lower triangle-connected coil 322 is connected in series with the lower phase-shifting coil 324 to form the lower coil 320; the three upper triangle-connected coils 312 are connected via the grid-side coil 300 leads using the extended triangle connection method, and the three lower triangle-connected coils 322 are connected via the grid-side coil 300 leads using the extended triangle connection method, and the upper coil 310 and the lower coil 320 are connected in parallel.

[0074] Please refer to Figure 3 In some embodiments, the upper triangle-connected coil 312, the upper phase-shifting coil 314, the lower phase-shifting coil 324, and the lower triangle-connected coil 322 are all provided with a gear adjustment switch 326. When the voltage needs to be adjusted, the gear adjustment switches 326 of the above four coils can be adjusted to the same gear position at the same time for adjustment.

[0075] Please refer to Figure 1 、 Figure 2 、 Figure 10 and Figure 11Based on any of the aforementioned embodiments, the three-dimensional wound core transformer 10 further includes a clamping structure 20 comprising a first clamping seat 410, a second clamping seat 420, and a tensioning member 440. The core 30 is clamped between the first clamping seat 410 and the second clamping seat 420. One end of the tensioning member 440 is connected to the first clamping seat 410, and the other end is connected to the second clamping seat 420. The first clamping seat 410 and the second clamping seat 420 are spaced apart to form a receiving space 430. The core 30 and the transformer structure formed by the valve-side first coil, the valve-side second coil, and the grid-side coil 300 wound around the core leg 700 are all disposed within the receiving space 430. The tensioning member 440 clamps the transformer structure within the receiving space 430 by applying a tensioning force to the first clamping seat 410, the second clamping seat 420, or both.

[0076] When the clamping structure 20 is in use, the transformer structure formed by the first valve side coil, the second valve side coil and the grid side coil 300 are all set in the accommodating space 430, and the tensioning member 440 applies a tensioning force to the first clamping seat 410 or the second clamping seat 420 or to the first clamping seat 410 and the second clamping seat 420 at the same time, so that the first clamping seat 410 and the second clamping seat 420 clamp the transformer structure, thereby improving the stability of the installation of the transformer structure.

[0077] Please refer to Figure 10 and Figure 11 The first clamping seat 410 is further provided with a flange 414, which can enhance the strength of the first clamping seat 410. Figure 10 and Figure 11 In order to adapt to the shape characteristics of the core 30, the first clamping seat 410 and the second clamping seat 420 are both configured to be hexagonal.

[0078] Please refer to Figure 10 and Figure 11 The number of the tensioning members 440 can be multiple, and all the tensioning members 440 are arranged at intervals along the circumference of the clamping structure 20.

[0079] Please refer to Figure 10In some embodiments, the tensioning member 440 includes a screw 442, a first nut 444 and a second nut 446. The first clamping seat 410 is provided with a first mounting hole (not shown), and the second clamping seat 420 is provided with a second mounting hole (not shown). One end of the screw 442 passes through the first mounting hole (not shown) and is screwed together with the first nut 444, and the other end of the screw 442 passes through the second mounting hole (not shown) and is screwed together with the second nut 446. The tensioning member 440 adjusts the tensioning force applied by the tensioning member 440 to the first clamping seat 410 and the second clamping seat 420 by screwing together the first nut 444 and the screw 442 and the second nut 446 and the screw 442.

[0080] Please refer to Figure 10 In some embodiments, the tensioning member 440 further includes a third nut 448, the first mounting hole is arranged between the first nut 444 and the third nut 448, the screw 442 passes through the third nut 448 and the first mounting hole and is screwed together with the first nut 444, and the tensioning member 440 is screwed together with the screw 442 through the first nut 444 and the third nut 448 to fix the first clamping seat 410 to the screw 442.

[0081] Please refer to Figure 1 and Figure 2 In some embodiments, a first pressure block 510 and a second pressure block 520 are further included. The first pressure block 510 is connected to the first clamping seat 410, and the second pressure block 520 is connected to the second clamping seat 420. The first clamping seat 410 acts on one end of the transformer structure through the first pressure block 510, and the second clamping seat 420 acts on the other end of the transformer structure through the second pressure block 520.

[0082] Specifically, comb-shaped racks are provided at both ends of the transformer structure, the first pressing block 510 is pressed against the upper comb-shaped rack, and the second pressing block 520 is disposed below the lower comb-shaped rack.

[0083] Please refer to Figure 10 and Figure 11 In some embodiments, the first clamping seat 410 includes a mounting body 412 for mounting the first pressing block 510, and the second clamping seat 420 includes a support body 422 for supporting the second pressing block 520. Specifically, the first pressing block 510 and the mounting body 412 can be connected by screws, and the second pressing block 520 is disposed on the supporting surface of the support body 422.

[0084] Please refer back Figure 6 and Figure 7 The first copper bar assembly 100 is connected to the first clamping seat 410, and the first copper bar 110, the second copper bar 120 and the third copper bar 130 in the first copper bar assembly 100 are insulated and connected to the first clamping seat 410 through insulating members.

[0085] Please refer back Figure 8 and Figure 9 The second copper bar assembly 200 is connected to the second clamping seat 420. The fourth copper bar 210, the fifth copper bar 220 and the sixth copper bar 230 in the second copper bar assembly 200 are insulated and connected to the second clamping seat 420 through insulating members.

[0086] Please refer to Figure 10 In some embodiments, the clamping structure 20 further includes a mounting bracket 416 , which is fixed to the first clamping seat 410 , and the mounting bracket 416 is used to mount the connection terminal of the grid-side coil 300 of the transformer structure.

[0087] Please refer to Figure 10 In some embodiments, the clamping structure 20 further includes a support base 600, and the second clamping base 420 is fixed to the support surface of the support base 600. In this way, the second clamping base 420 is supported by the support base 600, thereby more stably supporting the weight of the transformer structure.

[0088] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0089] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0090] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0091] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A lead structure, applied to a three-dimensional wound core transformer, wherein the three-dimensional wound core transformer comprises a valve-side first coil and a valve-side second coil spaced apart along a core leg of the transformer, characterized in that: include: a first copper busbar assembly, the first copper busbar assembly comprising three first connection portions for connecting to the head ends of the three valve-side first coils and three second connection portions for connecting to the tail ends of the three valve-side first coils, the three valve-side first coils being connected via the first copper busbar assembly in a star connection method; the first copper busbar assembly is further provided with three first connection terminals; the first copper busbar assembly is used to be arranged above the core leg, all the first connection portions and all the second connection portions are extended in a vertical direction toward the core leg, and all the first connection terminals are extended in a vertical direction away from the core leg and are located on the same side of the three-dimensional wound core transformer; and The second copper busbar assembly includes three third wiring parts for connecting to the head ends of the three valve-side second coils and three fourth wiring parts for connecting to the tail ends of the three valve-side second coils. The three valve-side second coils are connected through the second copper busbar assembly using a triangle wiring method; the second copper busbar assembly is also provided with three second wiring terminals; the second copper busbar assembly is used to be arranged below the iron core column, all the third wiring parts, all the fourth wiring parts and all the second wiring terminals are extended in the vertical direction toward the iron core column, and all the second wiring terminals are located on the same side of the three-dimensional wound core transformer.

2. The lead structure according to claim 1, wherein: The first copper bar assembly includes a first copper bar, a second copper bar and a third copper bar, the first copper bar includes a first wiring segment and a second wiring segment, the second copper bar includes a third wiring segment and a fourth wiring segment, and the third copper bar includes a fifth wiring segment and a sixth wiring segment; One end of the first wiring segment is provided with a first connecting portion, one end of the third wiring segment is provided with a second connecting portion, and one end of the fifth wiring segment is provided with a third connecting portion. The other end of the first wiring segment, the other end of the third wiring segment, and one end of the fifth wiring segment are each provided with a first wiring portion; one end of the second wiring segment, one end of the fourth wiring segment, and one end of the sixth wiring segment are each provided with a second wiring portion, and the other end of the second wiring segment, the other end of the fourth wiring segment, and the other end of the sixth wiring segment are each provided with a first wiring terminal. The first connecting portion, the second connecting portion, and the third connecting portion are connected to each other.

3. The lead structure according to claim 2, wherein: The first wiring segment includes a first wiring body and a second wiring body that are arranged at an angle and connected to each other, the third wiring segment includes a third wiring body and a fourth wiring body that are arranged at an angle and connected to each other, and the fifth wiring segment includes a fifth wiring body and a sixth wiring body that are arranged at an angle and connected to each other; Among them, one end of the first wiring body is provided with the first connecting portion, one end of the third wiring body is provided with the second connecting portion, and one end of the fifth wiring body is provided with the third connecting portion, and the other end of the second wiring body, the other end of the fourth wiring body and the other end of the sixth wiring body are all extended in the vertical direction toward the iron core column and are all provided with the first connecting portion.

4. The lead structure according to claim 1, wherein: The second copper bar assembly includes a fourth copper bar, a fifth copper bar and a sixth copper bar; The fourth copper bar is provided with a third connection portion for connecting to the head end of the second coil on the first valve side and a fourth connection portion for connecting to the tail end of the second coil on the second valve side; The fifth copper bar is provided with a fourth connection portion for connecting to the tail end of the second coil on the first valve side and a third connection portion for connecting to the head end of the second coil on the third valve side; One end of the sixth copper bar is provided with a third connection portion for connecting to the head end of the second valve side second coil and a fourth connection portion for connecting to the tail end of the third valve side second coil; The other end of the fourth copper bar, the other end of the fifth copper bar and the other end of the sixth copper bar are each provided with a second connecting terminal.

5. The lead structure according to claim 4, wherein: The fifth copper busbar includes a seventh wiring body and an eighth wiring body. The eighth wiring body includes a first split body and a second split body arranged at an angle and connected to each other. The first split body is provided with a first wiring terminal, and the second split body is connected to the seventh wiring body. The first split body, the second split body and the seventh wiring body are surrounded by an installation space, and the other end of the fourth copper busbar is passed through the installation space; the seventh wiring body is provided with a fourth wiring portion for connecting to the tail end of the second coil on the first valve side and a third wiring portion for connecting to the head end of the second coil on the third valve side.

6. The lead structure according to claim 5, wherein: The other end of the fourth copper bar, the other ends of the first split body and the sixth copper bar are all located on the same side of the seventh wiring body, the other end of the fourth copper bar is connected to the side of the seventh wiring body, the first split body is connected to the sixth copper bar, and the sixth copper bar is connected to the side of the seventh wiring body.

7. The lead structure according to claim 5, wherein: The first split body and the seventh wiring body are arranged opposite to each other, and the first split body is connected to one side surface of the portion of the fourth copper busbar located in the installation space via an insulating member, and the seventh wiring body is connected to the other side surface opposite to the portion of the fourth copper busbar located in the installation space via another insulating member; or The portion of the fourth copper busbar passing through the installation space is connected to the seventh wiring body through an insulating member.

8. A three-dimensional wound core transformer, characterized in that: It includes the lead structure described in any one of claims 1 to 7; it also includes three valve side first coils, three valve side second coils and an iron core, the iron core includes three iron core columns, one valve side first coil and one valve side second coil are correspondingly wound on one of the iron core columns, and the valve side first coil and the valve side second coil are arranged along the length direction of the iron core column.

9. The three-dimensional wound core transformer according to claim 8, characterized in that: It also includes three grid-side coils, one grid-side coil corresponds to one iron core leg, and one grid-side coil is wound outside the first valve-side coil and the second valve-side coil; One of the grid-side coils includes an upper triangle-connected coil, an upper phase-shifted coil, a lower phase-shifted coil, and a lower triangle-connected coil arranged along the length direction of the core leg; The upper delta-connected coil and the upper phase-shifted coil are connected in series to form an upper coil; The lower delta-connected coil and the lower phase-shifted coil are connected in series to form the lower coil; The three upper triangle-connected coils are connected via grid-side coil leads using an extended triangle connection method, and the three lower triangle-connected coils are connected via grid-side coil leads using an extended triangle connection method. The upper coil and the lower coil are connected in parallel.

10. The three-dimensional wound core transformer according to claim 8, characterized in that: It also includes a clamping structure, which includes a first clamping seat and a second clamping seat, and the iron core is clamped between the first clamping seat and the second clamping seat; the first copper bar assembly is connected to the first clamping seat, and the second copper bar assembly is connected to the second clamping seat.

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