Transformer winding structure and transformer

Abstract

The application belongs to the technical field of power transmission equipment, and discloses a transformer winding structure and a transformer, wherein the transformer winding structure comprises a support, a first winding, the first winding comprising a first wire, the first wire being wound on the support in a spiral manner and forming a plurality of first coils, and a first gap being arranged between any two adjacent first coils, a first filling structure arranged in the plurality of first gaps outside the first winding, and a second winding, the second winding comprising a second wire, the second wire being wound on the first winding and the first filling structure in a spiral manner and forming a plurality of second coils. The application can solve the technical problem of uneven winding in the winding structure of the transformer in the prior art.

Description

Technical Field

[0001] This application belongs to the field of power transmission equipment technology, specifically relating to a transformer winding structure and a transformer. Background Technology

[0002] In the transformer winding structure, when subsequent windings are wound on top of an already wound layer, some of the windings in the subsequent windings can easily enter the gaps between the windings in the previous layer, resulting in unevenness in the subsequent windings. This unevenness in the distance between the subsequent windings and the adjacent windings leads to changes in the parasitic capacitance in the transformer, causing a decrease in the transformer yield. Utility Model Content

[0003] The purpose of this application is to provide a transformer winding structure and a transformer to solve the technical problem of uneven windings in the transformer winding structure in the prior art.

[0004] To achieve the above objectives, an embodiment of the first aspect of this application provides a transformer winding structure, comprising: a support member; a first winding, the first winding including a first conductor, the first conductor being wound spirally on the support member to form a plurality of first coils, a first gap being provided between any two adjacent first coils; a first filling structure disposed in the plurality of first gaps outside the first winding; and a second winding, the second winding including a second conductor, the second conductor being wound spirally on the first winding and the first filling structure to form a plurality of second coils.

[0005] In some embodiments, the first filling structure is a strip, and the first filling structure is wound in a spiral manner on the first winding.

[0006] In some embodiments, the first filling structure is a wire, which is connected in parallel with a first wire or a second wire.

[0007] In some embodiments, the cross-section of the first filling structure is circular, and the ratio of the diameter of the first filling structure to the diameter of the first wire is less than or equal to 0.25; and / or, the diameter of the first filling structure is greater than or equal to 0.15 mm.

[0008] In some embodiments, the first filling structure is made of an insulating material.

[0009] In some embodiments, the support member includes a support rod and two limiting plates. The support rod extends along a first direction, and a first conductor is wound around the support rod. The two limiting plates are respectively connected to the two ends of the support rod along the first direction and perpendicular to the support rod. The limiting plates are used to block the movement of the first winding and the second winding.

[0010] In some embodiments, a first end gap is provided between the first winding and at least one limiting plate, and a portion of the first filling structure is provided in the first end gap outside the first winding.

[0011] In some embodiments, the transformer winding structure further includes insulating paper disposed between the first winding and the first filling structure and the second winding.

[0012] In some embodiments, a second gap is provided between any two adjacent second coils; the transformer winding structure also includes a third winding and a second filling structure, the second filling structure is provided in a plurality of second gaps outside the second winding, and the third winding is wound on the second winding and the second filling structure.

[0013] The second aspect of this application also provides a transformer, including the transformer winding structure of any one of the first aspect embodiments. The beneficial effects of the transformer winding structure and transformer provided in this application are as follows: By setting a first filling structure in multiple first gaps on the outer side of the first winding, the depth of the first gaps can be reduced, making the outer surface of the whole formed by the first winding and the first filling structure smoother. This, in turn, makes the inner surface of the second winding wound on the first winding and the first filling structure smoother, resulting in a higher yield rate and more stable equipment parameters with the transformer winding structure. This application can solve the technical problem of uneven windings in transformer winding structures. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the winding structure in an existing flyback transformer under ideal conditions; Figure 2 This is a schematic diagram of the winding structure in an existing flyback transformer during actual winding. Figure 3 This is a schematic diagram of a transformer winding structure provided in some embodiments of this application; Figure 4 A schematic diagram of the first winding and the first filling structure on the support structure provided in some embodiments of this application; Figure 5 This is a partial structural cross-sectional view of a transformer winding structure provided in some embodiments of this application.

[0016] The following are the labeling elements in the figure: 100. Transformer winding structure; 10. Support component; 11. Support rod; 12. Limiting plate; 20. First winding; 21. First coil; 22. First gap; 30. Second winding; 31. Second coil; 33. Second gap; 40. First filling structure; 50. First end gap; 60. Insulating paper; 200. Winding structure; 210. Inner winding; 220. Outer winding. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0019] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0020] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] Please refer to Figure 1The flyback transformer includes a winding structure 200. The parasitic capacitance of the winding structure 200 can be estimated using the formula C=ε*S / D; where C is the capacitance, S is the effective area of ​​the plates, D is the plate spacing (related to the distance between adjacent winding layers), and ε is the dielectric constant. Ideally, the distance between adjacent winding layers in the winding structure 200 is equal at different positions. However, due to gaps between the coils of the inner winding 210 (the innermost winding among adjacent layers), the outer surface of the inner winding 210 is not smooth. Please refer to... Figure 2 In actual winding, a portion of the outer winding 220 (the outermost winding among two adjacent winding layers) is easily wound into the gaps between the inner winding 210 coils, resulting in an uneven outer winding 220. This is especially true when flyback transformers use multi-strand wire with a larger diameter, leading to larger gaps between the coils. Consequently, the subsequent outer winding 220, with its smaller diameter wire, is more prone to unevenness. The inconsistent distances between the uneven winding and adjacent windings at different locations cause changes in the parasitic capacitance of the flyback transformer, thereby reducing its yield.

[0022] To address the aforementioned issues, this application provides a transformer winding structure that fills the gaps between coils in the winding to make subsequent windings flatter and to make the distances between adjacent winding layers at different positions more consistent, thereby improving the yield of the transformer.

[0023] An embodiment of the first aspect of this application provides a transformer winding structure for use in a transformer.

[0024] Please refer to Figures 3 to 5 The transformer winding structure 100 includes a support member 10, a first winding 20, a first filling structure 40, and a second winding 30. The first winding 20 includes a first conductor wound spirally on the support member 10 to form multiple first coils 21, with a first gap 22 between any two adjacent first coils 21. The first filling structure 40 is located in the multiple first gaps 22 outside the first winding 20. The second winding 30 includes a second conductor wound spirally on the first winding 20 and the first filling structure 40 to form multiple second coils 31.

[0025] The support member 10 is used to support the first winding 20, the first filling structure 40, and the second winding 30.

[0026] Multiple first coils 21 are formed by winding a single first conductor. Each first coil 21 is formed by winding the first conductor 360° around the support member 10. The multiple first coils 21 are connected sequentially according to the winding direction of the first conductor, and the overall structure of the multiple first coils 21 is a ring. The first conductor is wound directly or indirectly on the support member 10. Optionally, the first conductor can be directly wound on the support member 10, with the inner side of the first winding 20 in contact with the support member 10. Optionally, when the diameter of the first conductor is large, one or more windings can be wound on the support member 10 first, and then the first conductor can be wound onto the windings on the support member 10. The first conductor includes a conductor core and an insulation layer wrapped around the conductor core.

[0027] The first conductor can be wound into first coils 21 of different shapes on support members 10 of different shapes. Optionally, the orthographic projection of the first coil 21 onto the projection plane perpendicular to the first direction X can be a circle, a polygon, etc. The arrangement direction of the multiple first coils 21 is defined as the first direction X, which is also the length direction of each winding on the support member 10. The inner side of the winding refers to the side of the winding that is close to the support member 10 along the direction perpendicular to the first direction X. The outer side of the winding refers to the part of the winding and coil that is away from the support member 10 along the direction perpendicular to the first direction X, and the inner side of the winding refers to the part of the winding that is close to the support member 10 along the direction perpendicular to the first direction X. For example, the projection of the first winding 20 onto the projection plane perpendicular to the first direction X is a circle. The inner side of the first winding 20 refers to the part of the first winding 20 that is close to the support member 10 along its own radial direction, and the outer side of the first winding 20 refers to the part of the first winding 20 that is close to the second winding 30 along its own radial direction.

[0028] The first conductor is a round wire, please refer to... Figure 5 In the direction perpendicular to the first direction X, the cross-sections of two adjacent first coils 21 only contact at the middle position, and the contact position is a spiral. A first gap 22 is provided on both the inner and outer sides of the contact position of two adjacent first coils 21; that is, a first gap 22 is provided between two adjacent coils on the inner and outer sides of the first winding 20, respectively. The first filling structure 40 fills the first gap 22 on the outer side of the first winding 20. The depth direction of the first gap 22 is perpendicular to the first direction X. Optionally, in multiple directions perpendicular to the first direction X, the first filling structure 40 is flush with the end of the first winding 20 away from the support member 10, and the overall outer surface of the first filling structure 40 and the first winding 20 is flatter. The first filling structure 40 and the first winding 20 as a whole form an annular shape extending along the first direction X, and the overall shape of the outer surface of the first filling structure 40 and the first winding 20 is an annular surface extending along the first direction X.

[0029] The second winding 30 and the first winding 20 are two adjacent winding layers in the transformer winding structure 100. The second conductor includes a core and an insulation layer wrapped around the core. The first winding 20 and the second winding 30 are electrically isolated by the insulation layer. The second conductor is a round conductor. Multiple second coils 31 are formed by winding a single second conductor, and the multiple second coils 31 are connected sequentially according to the winding direction of the first conductor. The second conductor forms a second coil 31 after winding 360° on the first winding 20, and the multiple second coils 31 form a ring structure. The orthographic projection shape of the second coil 31 on the projection plane perpendicular to the first direction X is similar to the orthographic projection shape of the first coil 21 on the projection plane perpendicular to the first direction X. Optionally, the orthographic projection of the second coil 31 on the projection plane perpendicular to the first direction X can be a circle, a polygon, etc. Optionally, the wire diameter of the second conductor can be smaller than that of the first conductor. Without the first filling structure 40, the unevenness of the second winding 30 is relatively large. With the first filling structure 40, the second winding 30 is flatter.

[0030] When manufacturing the transformer winding structure 100, a first wire is spirally wound onto the support member 10 to form a first winding 20. Then, a first filling structure 40 is placed into a plurality of first gaps 22 on the outer part of the first winding 20. A second wire is spirally wound onto the first winding 20 and the first filling structure 40 to form a second winding 30.

[0031] The beneficial effects of this application embodiment are as follows: by providing a first filling structure 40 in the plurality of first gaps 22 on the outer side of the first winding 20, the depth of the first gaps 22 can be reduced, and the outer surface of the whole formed by the first winding 20 and the first filling structure 40 is flatter. This, in turn, makes the second winding 30 wound on the first winding 20 and the first filling structure 40 flatter, resulting in a higher yield rate and more stable equipment parameters for the transformer winding structure 100. This application embodiment can solve the technical problem of uneven windings in the multilayer transformer winding structure 100.

[0032] In some embodiments, please refer to Figure 3 The first filling structure 40 is a strip, and the first filling structure 40 is wound in a spiral manner on the first winding 20.

[0033] Optionally, the first filler structure 40 can be a soft strip, which is easily deformable during winding, making it convenient to wind the first filler structure 40 to a designated position. Optionally, the first filler structure 40 can be a silicone strip, which is heat-resistant and not easily damaged in electrical equipment that generates high temperatures. Optionally, the first filler structure 40 can also be a rubber strip, etc.

[0034] The multiple first gaps 22 are in a continuous spiral shape. When manufacturing the transformer winding structure 100, after the first winding 20 is wound, the first strip is wound in the multiple first gaps 22. The method of filling the first gaps 22 is relatively simple and the filling efficiency is relatively high.

[0035] The beneficial effects of this application embodiment are as follows: by using a strip to fill the first gap 22 by winding, the same strip is used in multiple first gaps 22, the shape and size of the first filling structure 40 in multiple first gaps 22 are consistent, and the outer surface of the whole composed of the first winding 20 and the first filling structure 40 is flatter.

[0036] In some embodiments, please refer to Figure 3 The first filling structure 40 is a conductor, which is connected in parallel with the first conductor or the second conductor.

[0037] The conductor includes a core and an insulation layer wrapped around the core. Optionally, the conductor can be connected in parallel with a first conductor, and the cross-section of the first conductor and the conductor together is larger than the cross-section of the first conductor; the resistance of the first conductor and the conductor together in parallel is smaller than the resistance of the first conductor, and the current carrying capacity is stronger.

[0038] Optionally, the conductor can also be connected in parallel with the second conductor. Compared with the cross-section of the second conductor, the cross-section of the second conductor and the conductor as a whole is larger; compared with the resistance of the second conductor, the resistance of the second conductor and the conductor as a whole in parallel is smaller, and the current carrying capacity is stronger.

[0039] Optionally, the first filling structure 40 can be made of the same material as the first and second conductors, resulting in a more stable current transmission process. For example, the first conductor, the second conductor, and the first filling structure 40 can all be copper wires.

[0040] The beneficial effect of this embodiment is that: placing the conductor in the first gap 22 does not increase the volume of the transformer winding structure 100. Connecting the conductor in parallel with the first conductor or the second conductor can improve the current carrying capacity of the transformer winding structure 100 without increasing its volume.

[0041] In some embodiments, please refer to Figure 3 and Figure 5 The cross-section of the first filling structure 40 is circular, and the ratio of the diameter of the first filling structure 40 to the diameter of the first wire is less than or equal to 0.25.

[0042] The first filler structure 40 is a strip with a circular cross-section. The diameter of the first filler structure 40 refers to the cross-sectional diameter of the strip. If the ratio of the diameter of the first filler structure 40 to the diameter of the first conductor is greater than 0.25, the first filler structure 40 is likely to protrude beyond the first gap 22, which will increase the unevenness of the outer surface of the first filler structure 40 and the first winding 20 as a whole.

[0043] Setting the ratio of the diameter of the first filling structure 40 to the diameter of the first wire to be less than or equal to 0.25 results in a smaller unevenness on the outer surface of the first filling structure 40 and the first winding 20 as a whole. Optionally, the ratio of the diameter of the first filling structure 40 to the diameter of the first wire can be 0.25, which can prevent the first filling structure 40 from protruding beyond the first gap 22 and can fill more space in the first gap 22, making the outer surface of the whole formed by the first winding 20 and the first filling structure 40 smoother. Optionally, the ratio of the diameter of the first filling structure 40 to the diameter of the first wire can also be 0.24, 0.2, etc.

[0044] In some embodiments, please refer to Figure 3 and Figure 5 The cross-section of the first filling structure 40 is circular, and the diameter of the first filling structure 40 is greater than or equal to 0.15 mm.

[0045] If the diameter of the insulated wire is less than 0.15mm, the wire strength is low and it is prone to breakage. By setting the diameter of the first filling structure 40 to be greater than or equal to 0.15mm, when the first filling structure 40 is a wire connected in parallel with the first or second wire, the connection between the first filling structure 40 and the first or second wire is more stable.

[0046] Optionally, the diameter of the first filling structure 40 can be 0.15 mm, 0.2 mm, etc.

[0047] In some embodiments, please refer to Figure 3 and Figure 5 The cross-section of the first filling structure 40 is circular, the ratio of the diameter of the first filling structure 40 to the diameter of the first wire is less than or equal to 0.25, and the diameter of the first filling structure 40 is greater than or equal to 0.15 mm.

[0048] In other embodiments, the cross-section of the first filling structure 40 may also be a rectangle, hexagon, or other polygon.

[0049] In some embodiments, the first filling structure 40 is made of an insulating material.

[0050] Optionally, the first filling structure 40 can be insulating adhesive, epoxy resin, etc., which can flow in the first gap 22 when filling it, making it easy to completely fill the first gap 22, so that the outer surface of the whole formed by the first winding 20 and the first filling structure 40 is smoother.

[0051] The beneficial effects of this application embodiment are that the portion of the second coil 31 wound on the first filling structure 40 is separated from the first coil 21 by the first filling structure 40, and the first filling material is set as an insulating material, which can improve the electrical isolation effect between the first winding 20 and the second winding 30, making the transformer winding structure 100 more stable in use.

[0052] In some embodiments, please refer to Figures 3 to 5 The support member 10 includes a support rod 11 and two limiting plates 12. The support rod 11 extends along a first direction X, and a first wire is wound around the support rod 11. The two limiting plates 12 are respectively connected to the two ends of the support rod 11 along the first direction X and are perpendicular to the support rod 11. The limiting plates 12 are used to block the movement of the first winding 20 and the second winding 30.

[0053] The support rod 11 is used to support the first winding 20. Optionally, the support rod 11 can be a round rod, a prism rod, etc. Optionally, the support rod 11 can be provided with a through hole extending along the first direction X. The support rod 11 is a hollow rod, which can reduce the weight of the transformer winding structure 100.

[0054] The first winding 20 and the second winding 30 are both wound on the support rod 11. The two limiting plates 12 are located at both ends of the support rod 11 along the first direction X, that is, the two limiting plates 12 are located on both sides of the first winding 20 and the second winding 30 along the first direction X. The two limiting plates 12 can prevent the first winding 20 and the second winding 30 from moving out of the support rod 11 along the first direction X.

[0055] Optionally, the limiting plate 12 can be a circular plate whose axis coincides with the center line of the support rod 11.

[0056] The beneficial effect of this embodiment is that the two limiting plates 12 can restrict the first winding 20 and the second winding 30 to the support rod 11. When the lengths of the first winding 20 and the second winding 30 are equal to those of the support rod 11, the limiting plates 12 can abut against the first winding 20 and the second winding 30, preventing the first winding 20 and the second winding 30 from deforming or shifting along the first direction X.

[0057] In some embodiments, please refer to Figure 3 and Figure 4A first end gap 50 is provided between the first winding 20 and at least one limiting plate 12, and a portion of the first filling structure 40 is provided in at least one first end gap 50 on the outer part of the first winding 20.

[0058] The first conductor is wound from one end of the support rod 11. At least one end of the first winding 20 along the first direction X is in line contact with the limiting plate 12. The inner and outer portions of the first winding 20 are respectively provided with a first end gap 50 between the limiting plate 12 and the limiting plate 12. The first filling structure 40 fills the first end gap 50 between the outer portion of the first winding 20 and the limiting plate 12.

[0059] For example, when the length of the first winding 20 is less than the length of the support rod 11, the first winding 20 contacts a limiting plate 12, and the first filling structure 40 may be provided only in the first end gap 50 between the outer portion of the first winding 20 and the adjacent limiting plate 12.

[0060] For example, when the length of the first winding 20 is equal to the length of the support rod 11, the first winding 20 contacts the two limiting plates 12, and the first filling structure 40 can also be provided in the two first end gaps 50 between the outer part of the first winding 20 and the two limiting plates 12.

[0061] When the second conductor is wound starting from one end of the support rod 11 along the first direction X, the second coil 31 is prone to getting wound in the first end gap 50 between the outer portion of the first winding 20 and the limiting plate 12, which can easily lead to increased unevenness of the second winding 30. Providing a first filling structure 40 in the first end gap 50 between the outer portion of the first winding 20 and the limiting plate 12 can support the second winding 30 and make the second winding 30 flatter.

[0062] In some embodiments, please refer to Figure 5 The transformer winding structure 100 also includes insulating paper 60, which is disposed between the first winding 20 and the first filling structure 40 and the second winding 30.

[0063] The insulating paper 60 is wrapped around the entire first winding 20 and the first filling structure 40 to form a ring structure. In the direction perpendicular to the first direction X, the insulating paper 60 separates the entire first winding 20 and the first filling structure 40 from the second winding 30, which can enhance the electrical isolation effect between the first winding 20 and the second winding 30.

[0064] Optionally, the insulating paper 60 can be insulating adhesive paper, which can be bonded and fixed to the first winding 20. Optionally, the insulating paper 60 can also be non-adhesive aramid paper, barley paper, etc.

[0065] Optionally, two layers of insulating paper 60 can be provided between the first winding 20 and the first filling structure 40 and the second winding 30 to enhance the electrical isolation effect.

[0066] In some embodiments, please refer to Figure 3 and Figure 5 A second gap 33 is provided between any two adjacent second coils 31; the transformer winding structure 100 also includes a third winding and a second filling structure. The second filling structure is provided in a plurality of second gaps 33 on the outer part of the second winding 30, and the third winding is wound on the second winding 30 and the second filling structure.

[0067] The third winding and the second winding 30 are two adjacent windings. The second conductor is a round wire. On the inner part of the second winding 30, a second gap 33 is provided between two adjacent second coils 31; on the outer part of the second winding 30, a second gap 33 is provided between two adjacent second coils 31, and a second filling structure fills the second gap 33 on the outer part of the second winding 30. The third winding is formed by spirally winding the third conductor on the second winding 30 and the second filling structure. The third conductor includes a wire core and an insulating layer wrapped around the wire core.

[0068] Optionally, the second filling structure can be an insulating material such as epoxy resin or insulating adhesive. Alternatively, the second filling structure can also be a strip-shaped component such as a wire or silicone strip.

[0069] Optionally, the second filling structure may be located in the gap between the outer portion of the second winding 30 and the limiting plate 12.

[0070] Optionally, the transformer winding structure 100 may include three or more windings, and a filling structure is provided between any two adjacent windings.

[0071] The beneficial effects of this application embodiment are: setting the second filling structure can make the outer surface of the second winding 30 and the second filling structure as a whole flatter, thereby making the third winding flatter and the transformer winding structure 100 has a higher yield.

[0072] In some embodiments, please refer to Figures 3 to 5The transformer winding structure 100 includes a support member 10, a first winding 20, a first filling structure 40, insulating paper 60, and a second winding 30. The first winding 20 includes a first conductor wound helically on the support member 10 to form multiple first coils 21, with a first gap 22 between any two adjacent first coils 21. The first filling structure 40 is a conductor wound helically in the multiple first gaps 22 outside the first winding 20, and the conductor is connected in parallel with the first conductor. The second winding 30 includes a second conductor wound helically on the first winding 20 and the first filling structure 40 to form multiple second coils 31. The insulating paper 60 is disposed between the entire first winding 20 and the first filling structure 40 and the second winding 30.

[0073] An embodiment of the second aspect of this application also provides a transformer, the transformer including the transformer winding structure 100 of any one of the embodiments of the first aspect.

[0074] Transformers include various types such as flyback transformers and forward transformers. Optionally, transformers may also include components such as a casing and switches.

[0075] The beneficial effects of the embodiments of this application are as follows: the transformer includes the transformer winding structure 100 in the first aspect embodiment, the inner side of the second winding 30 wound on the first winding 20 and the first filling structure 40 is flatter, it is easier to control the parasitic capacitance of the transformer at a preset value, the transformer yield is higher, and it has all the effects of the transformer winding structure 100.

[0076] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A transformer winding structure, characterized in that, include: Support components; The first winding includes a first conductor, which is wound in a spiral manner on the support to form a plurality of first coils, and a first gap is provided between any two adjacent first coils. The first filling structure is disposed in a plurality of the first gaps outside the first winding; The second winding includes a second conductor, which is wound in a spiral manner on the first winding and the first filling structure to form a plurality of second coils.

2. The transformer winding structure as described in claim 1, characterized in that, The first filling structure is a strip, and the first filling structure is wound on the first winding in a spiral manner.

3. The transformer winding structure as described in claim 2, characterized in that, The first filling structure is a wire, which is connected in parallel with the first wire or the second wire.

4. The transformer winding structure as described in claim 2, characterized in that, The first filling structure has a circular cross-section, and the ratio of the diameter of the first filling structure to the diameter of the first wire is less than or equal to 0.25; and / or, The diameter of the first filling structure is greater than or equal to 0.15 mm.

5. The transformer winding structure as described in claim 1, characterized in that, The first filling structure is made of insulating material.

6. The transformer winding structure as described in claim 1, characterized in that, The support member includes a support rod and two limiting plates. The support rod extends along a first direction, and the first conductor is wound around the support rod. The two limiting plates are respectively connected to the two ends of the support rod along the first direction and are perpendicular to the support rod. The limiting plates are used to block the movement of the first winding and the second winding.

7. The transformer winding structure as described in claim 6, characterized in that, A first end gap is provided between the first winding and at least one of the limiting plates, and part of the first filling structure is provided in at least one of the first end gaps outside the first winding.

8. The transformer winding structure as described in any one of claims 1-7, characterized in that, The transformer winding structure also includes insulating paper, which is disposed between the first winding and the first filling structure and the second winding.

9. The transformer winding structure as described in any one of claims 1-7, characterized in that, A second gap is provided between any two adjacent second coils; the transformer winding structure also includes a third winding and a second filling structure, the second filling structure is provided in a plurality of second gaps outside the second winding, and the third winding is wound on the second winding and the second filling structure.

10. A transformer, characterized in that, Includes the transformer winding structure as described in any one of claims 1-9.

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