Graphene copper-based high-conductivity three-dimensional roll core transformer

Abstract

The utility model belongs to transformer technical field discloses a kind of graphene copper-based high-conductivity three-dimensional winding iron core transformer.The graphene copper-based high-conductivity three-dimensional winding iron core transformer includes transformer core body, transformer core body includes three-dimensional winding iron core and the coil assembly being set on the core column of three-dimensional winding iron core, coil assembly includes low-voltage winding, insulating heat-dissipating piece and high-voltage winding.Low-voltage winding is wound on core column, and low-voltage winding is made of multiple first conducting wire, and first conducting wire includes first wire rod and first graphene-based high-conductive copper layer being covered outside first wire rod;Insulating heat-dissipating piece is covered outside low-voltage winding;High-voltage winding is wound on insulating heat-dissipating piece, and high-voltage winding is made of multiple second conducting wire, and second conducting wire includes second wire rod and second graphene-based high-conductive copper layer being covered outside second wire rod.The total energy consumption of the graphene copper-based high-conductivity three-dimensional winding iron core transformer is lower.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a graphene copper-based high-conductivity three-dimensional wound core transformer. Background Technology

[0002] The three-dimensional wound core transformer is an energy-saving power transformer that creatively reforms the traditional laminated magnetic circuit structure and three-phase layout of power transformers, thereby optimizing product performance.

[0003] Currently, the conductor materials used in three-dimensional wound core transformers are mostly traditional conductor materials such as copper. The physical and chemical properties of traditional conductor materials can no longer be further optimized by changing the design scheme, making it difficult to further reduce the overall energy consumption of three-dimensional wound core transformers.

[0004] Therefore, there is an urgent need to propose a graphene-based copper-based high-conductivity three-dimensional wound core transformer to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a graphene-copper-based high-conductivity three-dimensional wound core transformer, in which both the low-voltage and high-voltage windings are made of wire coated with a graphene-based high-conductivity copper layer, which greatly improves the conductivity of the low-voltage and high-voltage windings and reduces the resistance value, thereby helping to reduce the total energy consumption of the graphene-copper-based high-conductivity three-dimensional wound core transformer.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A graphene-copper-based high-conductivity three-dimensional wound core transformer includes a transformer core, the transformer core comprising a three-dimensional wound core and a coil assembly disposed on a core column of the three-dimensional wound core, the coil assembly comprising:

[0008] A low-voltage winding is wound around the core post. The low-voltage winding is made of multiple first conductors. The first conductors include a first wire and a first graphene-based highly conductive copper layer covering the first wire.

[0009] An insulating heat dissipation component is provided to cover the low-voltage winding.

[0010] A high-voltage winding is wound around the insulating heat sink. The high-voltage winding is made of multiple second conductors, each of which includes a second wire and a second graphene-based highly conductive copper layer covering the second wire.

[0011] Optionally, the first graphene-based high-conductivity copper layer is a graphene-based high-conductivity copper high-temperature resistant paper covering the first wire.

[0012] And / or, the second graphene-based highly conductive copper layer is a graphene-based highly conductive copper varnish film coated on the outside of the second wire.

[0013] Optionally, the first and last exits of the low-voltage winding are located at the same end in the axial direction of the low-voltage winding, and the low-voltage winding is wound with the last exit inside and the first exit outside.

[0014] The first and last exits of the high-voltage winding are located at the same end in the axial direction of the high-voltage winding, and the high-voltage winding is wound with the last exit inside and the first exit outside.

[0015] Optionally, the insulating heat sink includes a first high-temperature resistant insulating paper and a plurality of support strips, the plurality of support strips being spaced apart, and a main channel being formed between two adjacent support strips, the main channel being used for the flow of cooling medium.

[0016] Optionally, the high-voltage winding includes multiple coil layers, with a second high-temperature resistant insulating paper provided between adjacent coil layers.

[0017] Optionally, the multiple first conductors are wound in a parallel spiral manner; and / or, the multiple second conductors are wound in a single-layer manner.

[0018] Optionally, the three-dimensional coiled iron core includes three closed iron core frames, which are spliced ​​together to form a three-dimensional triangular structure, and the splicing point of two adjacent iron core frames forms the core column.

[0019] Optionally, the graphene copper-based high-conductivity three-dimensional wound core transformer further includes an oil tank filled with cooling oil, and the three-dimensional wound core is installed in the oil tank and immersed in the cooling oil.

[0020] Optionally, both the inner and outer walls of the fuel tank are coated with graphene.

[0021] Optionally, the oil tank includes a tank body and a tank cover on top of the tank body; the tank cover is provided with an oil filling hole and an oil level gauge, the oil level gauge includes a measuring part and an oil level indicating window, the measuring part is located inside the tank body, and the oil level indicating window is located outside the tank cover.

[0022] The beneficial effects of this utility model are:

[0023] This invention provides a graphene-copper-based high-conductivity three-dimensional wound core transformer, comprising a transformer core, which includes a three-dimensional wound core and a coil assembly. The coil assembly includes a low-voltage winding, an insulating heat sink, and a high-voltage winding. Both the low-voltage and high-voltage windings are wound with wire coated with a graphene-based high-conductivity copper layer. Because the graphene-based high-conductivity copper composite material has excellent electrical and thermal conductivity and high mechanical strength, this design improves the conductivity of both the low-voltage and high-voltage windings, thus reducing overall energy consumption. Furthermore, it significantly enhances the mechanical strength of the wire, reducing the risk of breakage during winding, while also improving the reliability of shape retention of the low-voltage and high-voltage windings and reducing the risk of short circuits due to creep. In addition, due to the improved thermal conductivity, the temperature rise of the low-voltage winding and the high-voltage winding is smaller under the same workload, allowing the graphene copper-based high-conductivity three-dimensional wound core transformer to operate at higher power without overheating. This improves the reliability of the graphene copper-based high-conductivity three-dimensional wound core transformer, and the lower operating temperature also helps to extend the service life of the low-voltage winding and the high-voltage winding.

[0024] Compared with wires made directly from graphene-based high-conductivity copper composites, wires coated with graphene-based high-conductivity copper layers can improve conductivity, thermal conductivity, and mechanical strength, while effectively reducing material and processing costs.

[0025] By installing insulating heat dissipation components between the low-voltage and high-voltage windings, both electrical insulation between the low-voltage and high-voltage windings can be ensured, and the temperature of the low-voltage and high-voltage windings can be reduced, thereby extending the service life of the graphene copper-based high-conductivity three-dimensional wound core transformer. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the transformer core structure from one perspective provided by an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the three-dimensional wound iron core provided in this embodiment of the utility model.

[0029] Figure 3 This is a schematic diagram of the structure of the coil assembly provided in this embodiment of the utility model;

[0030] Figure 4This is an exploded view of the coil assembly provided in an embodiment of the present utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the insulating heat sink provided in this embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of the transformer core structure from another perspective provided by an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the graphene copper-based high-conductivity three-dimensional wound iron core transformer provided in this embodiment of the utility model;

[0034] Figure 8 This is a schematic diagram of the winding method of low-voltage windings in the existing technology;

[0035] Figure 9 This is a schematic diagram of the winding method of the low-voltage winding provided in this embodiment of the utility model.

[0036] In the picture:

[0037] 100. Transformer core; 110. Three-dimensional wound core; 111. Core frame; 1111. Core column; 120. Coil assembly; 121. Low-voltage winding; 122. Insulating heat sink; 1221. First high-temperature resistant insulating paper; 1222. Support bar; 1223. Main air passage; 123. High-voltage winding; 124. Insulating cylinder; 130. First triangular pressure block; 140. Second triangular pressure block; 150. Screw;

[0038] 200. Fuel tank. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] Example 1

[0044] This embodiment provides a graphene-copper-based high-conductivity three-dimensional wound core transformer, in which both the low-voltage and high-voltage windings are made of wire coated with a graphene-based high-conductivity copper layer, which greatly improves the conductivity of the low-voltage and high-voltage windings and reduces the resistance value, thereby helping to reduce the total energy consumption of the graphene-copper-based high-conductivity three-dimensional wound core transformer.

[0045] like Figures 1-4 As shown, the graphene copper-based high-conductivity three-dimensional wound core transformer includes a transformer core 100, which includes a three-dimensional wound core 110 and a coil assembly 120 disposed on the core post 1111 of the three-dimensional wound core 110.

[0046] The coil assembly 120 includes a low-voltage winding 121, a high-voltage winding 123, and an insulating heat sink 122.

[0047] Specifically, the low-voltage winding 121 is wound around the core post 1111. The low-voltage winding 121 is formed by winding multiple first conductors, each first conductor comprising a first wire and a first graphene-based highly conductive copper layer covering the first wire. The insulating heat sink 122 covers the low-voltage winding 121. The high-voltage winding 123 is wound around the insulating heat sink 122. The high-voltage winding 123 is formed by winding multiple second conductors, each second conductor comprising a second wire and a second graphene-based highly conductive copper layer covering the second wire.

[0048] That is, in this coil assembly 120, both the low-voltage winding 121 and the high-voltage winding 123 are made of wire coated with a graphene-based high-conductivity copper layer. Because the graphene-based high-conductivity copper composite material has excellent electrical and thermal conductivity and high mechanical strength, this configuration improves the conductivity of the low-voltage winding 121 and the high-voltage winding 123, which helps reduce overall energy consumption. Furthermore, it significantly enhances the mechanical strength of the wire, reducing the risk of breakage during winding, while also improving the reliability of shape retention of the low-voltage winding 121 and the high-voltage winding 123, reducing the risk of short circuits due to creep. In addition, due to the improved thermal conductivity, the temperature rise of the low-voltage winding 121 and the high-voltage winding 123 is smaller under the same working load, allowing the graphene copper-based high-conductivity three-dimensional wound core transformer to operate at higher power without overheating, thus improving the reliability of the operation of the graphene copper-based high-conductivity three-dimensional wound core transformer. The lower operating temperature also helps to extend the service life of the low-voltage winding 121 and the high-voltage winding 123.

[0049] It is worth noting that, compared with wires made directly from graphene-based high-conductivity copper composite materials, wires coated with graphene-based high-conductivity copper layers can improve conductivity, thermal conductivity, and mechanical strength, while effectively reducing material and processing costs.

[0050] By providing an insulating heat sink 122 between the low-voltage winding 121 and the high-voltage winding 123, the electrical insulation between the low-voltage winding 121 and the high-voltage winding 123 can be guaranteed, and the temperature of the low-voltage winding 121 and the high-voltage winding 123 can be reduced, which in turn helps to extend the service life of the graphene copper-based high-conductivity three-dimensional wound core transformer.

[0051] Optionally, in one possible embodiment, the first graphene-based highly conductive copper layer is a graphene-based highly conductive copper high-temperature resistant paper covering the first wire. This configuration simplifies the fabrication of the first wire and reduces processing costs.

[0052] Alternatively, in another possible embodiment, the second graphene-based highly conductive copper layer is a graphene-based highly conductive copper varnish coated on the outside of the second wire. Since the high-voltage winding 123 requires a low resistivity, the thickness of the second graphene-based highly conductive copper layer should be relatively thin in order to minimize the cross-sectional area of ​​the second conductor. Therefore, forming the second graphene-based highly conductive copper layer by coating not only meets the requirement of low resistivity but also simplifies the processing technology, thereby reducing costs and improving processing efficiency.

[0053] It is understandable that in the high-voltage winding 123 where the resistivity requirement is not high, the second graphene-based high-conductivity copper layer can also be a graphene-based high-conductivity copper high-temperature resistant paper wrapped around the second wire.

[0054] Optionally, see [link to relevant documentation] Figure 3 and Figure 4 In one possible embodiment, the core post 1111 is covered with an insulating sleeve 124 to achieve insulation between the core post 1111 and the low-voltage winding 121.

[0055] Alternatively, the insulating cylinder 124 may be made of high-temperature resistant paper.

[0056] Further, see also Figures 3-5 The insulating heat sink 122 includes a first high-temperature resistant insulating paper 1221 and multiple support bars 1222. The multiple support bars 1222 are spaced apart, and a main channel 1223 is formed between two adjacent support bars 1222 for the passage of cooling medium. The insulating heat sink 122 has a simple structure, is easy to process and assemble, and uses the first high-temperature resistant insulating paper 1221, which makes the insulating heat sink 122 have strong high-temperature resistance. This allows it to better withstand the temperature rise caused by short-term high load of the graphene copper-based high-conductivity three-dimensional wound core transformer, thus broadening the application scenarios of the graphene copper-based high-conductivity three-dimensional wound core transformer.

[0057] It is understood that the cooling medium can be either cooling oil or cooling gas, and this application does not make any specific limitation.

[0058] Understandably, the width of the first high-temperature resistant insulating paper 1221 is generally equal to the axial length of the low-voltage winding 121, and the length of the first high-temperature resistant insulating paper 1221 is generally equal to the circumferential length of the low-voltage winding 121. Before the insulating heat sink 122 is assembled, the first high-temperature resistant insulating paper 1221 is in a flattened state. Multiple support strips 1222 can be arranged parallel to each other along the length of the first high-temperature resistant insulating paper 1221 and extend along the width of the first high-temperature resistant insulating paper 1221. The length of the support strips 1222 can be the same as the width of the first high-temperature resistant insulating paper 1221. During assembly, the first high-temperature resistant insulating paper 1221 is lifted, wrapped around the low-voltage winding 121, and the two wide sides are joined together or glued together.

[0059] Optionally, the support bar 1222 can be attached to the low-voltage winding 121 or the high-voltage winding 123; this application does not impose a specific limitation. In one possible embodiment, the support bar 1222 is attached to the low-voltage winding 121. With this configuration, the high-voltage winding 123 is formed by winding the second conductor on the first high-temperature resistant insulating paper 1221. Compared to forming the second conductor by winding it on multiple support bars 1222, the winding difficulty is lower.

[0060] Optionally, in one possible embodiment, the high-voltage winding 123 includes multiple coil layers, with a second high-temperature resistant insulating paper between adjacent coil layers. By providing the second high-temperature resistant insulating paper, insulation between coil layers is ensured while allowing the transformer to operate under high-temperature conditions. This results in higher insulation performance and service life, and also broadens the application scenarios of the graphene copper-based high-conductivity three-dimensional wound core transformer.

[0061] Optionally, in one possible embodiment, the multiple first wires can be wound in a parallel spiral manner. The number of first wires can be three, four, etc., depending on actual needs, and this application does not impose a specific limitation.

[0062] Alternatively, in another possible embodiment, the multiple second conductors can be wound in a single-layer manner.

[0063] In this embodiment, multiple first conductors are wound in a parallel spiral manner, and multiple second conductors are wound in a single-layer manner.

[0064] Further, see also Figure 2 The three-dimensional wound core 110 comprises three closed core frames 111, which are assembled into a three-dimensional triangular structure. The joints of adjacent core frames 111 form core pillars 1111. This arrangement ensures symmetrical distribution of the three phases of the three-dimensional wound core 110, resulting in a more uniform magnetic circuit distribution, which is beneficial for the stable operation of the graphene-copper-based high-conductivity three-dimensional wound core transformer. Furthermore, the noise level is significantly lower than the national standard level 2 energy efficiency requirement.

[0065] Optionally, the material of the iron core frame 111 can be an amorphous alloy, which helps to reduce no-load loss.

[0066] Furthermore, such as Figure 1 and Figure 6 As shown, since the iron core frame 111 cannot bear force, in order to increase the clamping area of ​​the coil assembly 120, a first triangular clamping block 130 and a second triangular clamping block 140 are respectively provided in the middle of the three iron core frames 111. The first triangular clamping block 130 and the second triangular clamping block 140 are connected by a screw 150, and the first triangular clamping block 130 and the second triangular clamping block 140 clamp and fix the three coil assemblies 120.

[0067] Furthermore, such as Figure 7 As shown, the graphene copper-based high-conductivity three-dimensional wound core transformer also includes an oil tank 200, which is filled with cooling oil. The three-dimensional wound core 110 is installed in the oil tank 200 and immersed in the cooling oil.

[0068] Optionally, both the inner and outer walls of the oil tank 200 are coated with graphene. Because graphene has excellent thermal conductivity, applying a graphene coating to the inner and outer walls of the oil tank 200 improves the heat dissipation performance of the graphene-coated copper-based high-conductivity three-dimensional wound core transformer under natural convection conditions. This not only increases the upper limit of the high-load capacity of the graphene-coated copper-based high-conductivity three-dimensional wound core transformer but also prevents excessive temperature differences between the transformer and the external environment, resulting in greater energy efficiency and safety.

[0069] Optionally, the oil tank 200 includes a tank body and a cover on top of the tank body. An oil filling hole is located on the cover, through which cooling oil is filled into the oil tank 200. Furthermore, the cover is equipped with an oil level gauge, which includes a measuring part and an oil level indicating window. The measuring part is located inside the tank, while the oil level indicating window is located outside the cover. When adding cooling oil, filling is generally stopped when the oil level indicating window displays green to maintain a certain air gap.

[0070] Optionally, the graphene copper-based high-conductivity three-dimensional wound core transformer also includes an explosion-proof resin bushing (not shown in the figure) for leading out high and low voltage leads. The explosion-proof resin bushing has extremely strong tensile strength, which improves the safety of the graphene copper-based high-conductivity three-dimensional wound core transformer.

[0071] Example 2

[0072] This embodiment provides a graphene-based copper-based high-conductivity three-dimensional wound core transformer, which has a largely the same structure as Embodiment 1, with improvements only. Therefore, only the differences between the two are described here, and the structures identical to those in Embodiment 1 will not be repeated. In this embodiment, the same or corresponding technical features as in Embodiment 1 are referred to by the same reference numerals.

[0073] In existing technology, the winding methods for high-voltage windings and low-voltage windings are basically the same. For example... Figure 8 As shown, taking the low-voltage winding as an example, the conventional winding method is as follows: the wire head 'a' is inside the coil, and the wire tail 'x' is outside the coil, with both wire head 'a' and wire tail 'x' located at the top. Wire tail 'x' is usually connected to the wire tail 'x' of the other two phases of the low-voltage winding to form the neutral point, and wire head 'a' is led out to the corresponding three-phase bushing. Because in the traditional three-phase three-dimensional wound core product structure, the neutral point convergence point is located in the space above the transformer body and below the casing, and wire tail 'x' is located outside of wire head 'a', this causes wire head 'a' to be blocked by wire tail 'x' during its upward convergence after being led out. To avoid wire tail 'x' obstructing the lead-out of wire head 'a', wire head 'a' needs to be bent outwards and wire tail 'x' needs to be bent inwards. This results in a crossing between wire head 'a' and wire tail 'x', and the distance between the two at the crossing point is relatively short, which can easily cause a short circuit.

[0074] Based on the above issues, such as Figure 9As shown, in this embodiment, the first end a and the last end x of the low-voltage winding 121 are located at the same end in the axial direction of the low-voltage winding 121, and the low-voltage winding 121 is wound with the last end x inside and the first end a outside. Similarly, the first end and the last end x of the high-voltage winding 123 are located at the same end in the axial direction of the high-voltage winding 123, and the high-voltage winding 123 is wound with the last end inside and the first end outside.

[0075] This configuration, with the first exit point outside the last exit point, ensures that it is not obstructed by the last exit point during its upward extension. This maintains the insulation distance between the first and last exit points, reducing the risk of short circuits, and eliminates the need for bending at the first and last exit points, thus reducing manufacturing complexity. Furthermore, by changing the winding method, the transformer polarity remains unchanged, guaranteeing stable operation.

[0076] It is worth noting that, under normal circumstances, if the traditional winding adopts a left-hand winding direction, then after swapping the inner and outer ends of the lead-in and tail-out leads, it should be changed to a right-hand winding direction.

[0077] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A graphene-copper-based high-conductivity three-dimensional wound core transformer, characterized in that, The transformer core (100) includes a three-dimensional wound core (110) and a coil assembly (120) disposed on a core post (1111) of the three-dimensional wound core (110). The coil assembly (120) includes: A low-voltage winding (121) is wound around the core post (1111). The low-voltage winding (121) is made of multiple first wires. The first wires include a first wire and a first graphene-based highly conductive copper layer covering the first wire. An insulating heat sink (122) is provided to cover the low-voltage winding (121); A high-voltage winding (123) is wound around the insulating heat sink (122). The high-voltage winding (123) is made of multiple second conductors, each of which includes a second wire and a second graphene-based highly conductive copper layer covering the second wire.

2. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 1, characterized in that, The first graphene-based high-conductivity copper layer is a graphene-based high-conductivity copper high-temperature resistant paper covering the first wire. And / or, the second graphene-based highly conductive copper layer is a graphene-based highly conductive copper varnish film coated on the outside of the second wire.

3. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 1, characterized in that, The first end and the last end of the low-voltage winding (121) are located at the same end in the axial direction of the low-voltage winding (121), and the low-voltage winding (121) is wound with the last end inside and the first end outside. The first end and the last end of the high voltage winding (123) are located at the same end in the axial direction of the high voltage winding (123), and the high voltage winding (123) is wound with the last end inside and the first end outside.

4. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 1, characterized in that, The insulating heat dissipation component (122) includes a first high-temperature resistant insulating paper (1221) and a plurality of support strips (1222). The plurality of support strips (1222) are spaced apart, and a main channel (1223) is formed between two adjacent support strips (1222). The main channel (1223) is used for the flow of cooling medium.

5. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 1, characterized in that, The high-voltage winding (123) includes multiple coil layers, and a second high-temperature resistant insulating paper is provided between adjacent coil layers.

6. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 1, characterized in that, Multiple first conductors are wound in a parallel spiral manner; and / or, multiple second conductors are wound in a single-layer manner.

7. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to any one of claims 1-6, characterized in that, The three-dimensional coiled iron core (110) includes three closed iron core frames (111), the three iron core frames (111) are spliced ​​together to form a three-dimensional triangular structure, and the splicing point of two adjacent iron core frames (111) forms the core column (1111).

8. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to any one of claims 1-6, characterized in that, The graphene copper-based high-conductivity three-dimensional wound core transformer also includes an oil tank (200), which is filled with cooling oil, and the three-dimensional wound core (110) is installed in the oil tank (200) and immersed in the cooling oil.

9. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 8, characterized in that, The inner and outer walls of the oil tank (200) are coated with graphene.

10. The graphene-copper-based high-conductivity three-dimensional wound core transformer according to claim 8, characterized in that, The oil tank (200) includes a tank body and a tank cover on the top of the tank body; the tank cover is provided with an oil filling hole and an oil level gauge, the oil level gauge includes a measuring part and an oil level indicating window, the measuring part is located inside the tank body, and the oil level indicating window is located outside the tank cover.

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