Winding structure and magnetic element comprising same
By employing a specific winding structure and winding method in the transformer, the problem of existing transformers being unable to simultaneously achieve high power density and control leakage inductance has been solved, thus realizing a highly efficient transformer design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHICONY POWER TECH CO LTD
- Filing Date
- 2024-12-10
- Publication Date
- 2026-05-15
AI Technical Summary
Existing transformer designs struggle to simultaneously achieve the requirements of high power density and easy leakage inductance control.
A winding structure is adopted, including a winding frame, a first winding and a second winding. The winding frame consists of two blades and a winding shaft. The winding is wound on different sections of the winding shaft in a specific manner, and these sections are separated by partitions to form winding slots, thereby realizing the stacking and cross-slot connection of the windings.
A transformer design with high power density and easy leakage inductance control has been achieved, meeting the needs of high-wattage power consumption.
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Figure CN122051004A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a winding structure and a magnetic element comprising the winding structure. Background Technology
[0002] With the development of technology and industry, the demand for high-wattage power supplies is increasing. This trend has led engineers to rethink transformer design in order to achieve high power density and easy control of leakage inductance. Summary of the Invention
[0003] In view of this, one objective of this disclosure is to provide a high power density and easily controllable leakage inductance magnetic element, as well as a winding structure for the magnetic element.
[0004] According to some embodiments disclosed herein, a winding structure includes a winding frame, a first winding, and a second winding. The winding frame includes two blades and a winding shaft connected between the two blades. The winding shaft includes a first section and a second section. The first winding includes a first lead end, a first segment, a second segment, a second lead end, and a fourth segment. The first lead end is connected to one end of the first segment, and the first segment is wound around the first section of the winding shaft. The second segment is wound around the second section of the winding shaft, and one end of the second segment is connected to the second lead end. The fourth segment is connected between the first segment and the second segment. The second winding includes a third lead end, a third segment, and a fourth lead end. The third lead end is connected to one end of the third segment, the third segment is wound around the second section of the winding shaft, and is stacked with the second segment of the first winding. The other end of the third segment is connected to the fourth lead end.
[0005] In one or more embodiments disclosed herein, the winding frame further includes a partition disposed on the winding shaft and separating a first section and a second section of the winding shaft to form a first winding groove and a second winding groove located on both sides of the partition. A first wire segment is disposed in the first winding groove, a second wire segment and a third wire segment are disposed in the second winding groove, and a fourth wire segment passes through the partition or passes through one side of the partition.
[0006] In one or more embodiments disclosed herein, the partition has a cross-slot portion that connects the first winding slot and the second winding slot and allows the fourth segment of the first winding to pass through. The cross-slot portion is a notch, a through hole, or a groove.
[0007] In one or more embodiments disclosed herein, the partition protrudes from the winding shaft at a first position by a first distance and at a second position by a second distance, the second distance being less than the first distance. A fourth segment extends through the partition from the second position.
[0008] In one or more embodiments disclosed herein, one of the two blades has a knotting portion, the partition has a thread-organizing portion, and the knotting portion and the thread-organizing portion are located on the same side of the winding frame.
[0009] In one or more embodiments disclosed herein, at least one of the first lead end, the second lead end, the third lead end, and the fourth lead end passes through the first winding groove or the second winding groove and is fixed to the wire management part and the wire knotting part, while the remaining one of the first lead end, the second lead end, the third lead end, and the fourth lead end passes through the first winding groove or the second winding groove and is fixed to the wire knotting part and is separated from the wire management part.
[0010] In one or more embodiments disclosed herein, the fourth segment of the first winding and the wire management portion are located on different sides of the partition.
[0011] In one or more embodiments disclosed herein, the length of the first line segment is greater than the length of the second line segment.
[0012] In one or more embodiments disclosed herein, the length of the second line segment is less than the length of the third line segment.
[0013] In one or more embodiments disclosed herein, the second line segment has a first winding width in the axial direction of the winding shaft, and the third line segment has a second winding width in the axial direction, wherein the second winding width is greater than the first winding width.
[0014] In one or more embodiments disclosed herein, the second line segment is superimposed on the side of the third line segment away from the winding axis, or the third line segment is superimposed on the side of the second line segment away from the winding axis.
[0015] In one or more embodiments disclosed herein, the third line segment is arranged in two layers with a distance different from the winding axis, and the second line segment is disposed between the two layers.
[0016] According to some embodiments disclosed herein, a magnetic element includes the above-described winding structure and an iron core disposed on a winding frame of the winding structure.
[0017] In summary, the disclosed winding structure includes a winding frame and a first winding and a second winding wound on the winding frame. The first winding is partially wound on a first section of the winding shaft of the winding frame and partially wound on a second section of the winding shaft. The second winding is wound on a second section of the winding shaft and stacked with a portion of the first winding. This configuration helps to achieve a transformer with high power density and easily controllable leakage inductance. Attached Figure Description
[0018] To make the above and other objects, features, advantages and embodiments disclosed herein more apparent and understandable, the accompanying drawings are described below:
[0019] Figure 1 A schematic exploded view of a magnetic element according to one embodiment of this disclosure is provided.
[0020] Figure 2 For illustration Figure 1 A schematic diagram of the magnetic components shown.
[0021] Figure 3 For illustration Figure 2 The diagram shows a schematic cross-sectional view of the magnetic element at the mark 3-3'.
[0022] Figure 4 A perspective view of a winding frame according to another embodiment of this disclosure is provided;
[0023] Figure 5 To illustrate a schematic front view of a magnetic element according to another embodiment of this disclosure, wherein the magnetic element comprises Figure 4 The winding frame shown;
[0024] Figure 6 For illustration Figure 5 A schematic rear view of the magnetic element shown;
[0025] Figure 7 For illustration Figure 5 The schematic cross-sectional view of the magnetic element shown is located at the mark 7-7' on line segment;
[0026] Figure 8 A schematic cross-sectional view of a magnetic element according to another embodiment of this disclosure is provided.
[0027] Figure 9 A schematic front view of a magnetic element according to another embodiment of this disclosure is provided.
[0028] Figure 10 A schematic front view of a magnetic element according to another embodiment of this disclosure is provided.
[0029] Figure 11 For illustration Figure 10 The diagram shows a schematic cross-sectional view of the magnetic element at the mark 11-11'.
[0030] Figure 12 A schematic cross-sectional view of a magnetic element according to another embodiment of this disclosure is provided.
[0031] Figure 13 A diagram illustrating the magnetomotive force of the magnetic element disclosed herein.
[0032] [Symbol Explanation]
[0033] 20, 20A, 20B, 20C, 20D, 20E: Magnetic components
[0034] 21: First core component
[0035] 22: Second core component
[0036] 23: Iron core
[0037] 24: Winding Structure
[0038] 25: Winding
[0039] 30, 30A, 30B: Winding frame
[0040] 31: First Section
[0041] 32: Second Section
[0042] 33: Borehole
[0043] 34: Through hole
[0044] 35: Leaf
[0045] 36: Knotting section
[0046] 37,37B: Partition
[0047] 38: Cross-slot section
[0048] 39: Cable Management Department
[0049] 50: First winding
[0050] 51: First lead end
[0051] 52: Second lead end
[0052] 54: Fourth line segment
[0053] 56: First line segment
[0054] 57: Second line segment
[0055] 60: Second winding
[0056] 63: Third lead end
[0057] 64: Fourth lead end
[0058] 65: Third line segment
[0059] 91: First winding slot
[0060] 92: Second winding slot
[0061] l T Total slot width
[0062] l α ,l β ,l σ :slot width
[0063] l p_av ,l s_av ,l γ_av Average winding length
[0064] P1: First position
[0065] P2: Second position
[0066] R: Axial direction
[0067] W1: First winding width
[0068] W2: Second winding width Detailed Implementation
[0069] To make the description of this disclosure more detailed and complete, reference may be made to the accompanying drawings and the various embodiments described below. The elements in the drawings are not drawn to scale and are provided for illustrative purposes only. Many practical details are described below to provide a comprehensive understanding of this disclosure; however, those skilled in the art will understand that this disclosure can be practiced without one or more of these practical details, and therefore, these details should not be used to limit this disclosure.
[0070] Please refer to Figure 1 and Figure 2 . Figure 1 To illustrate a schematic exploded view of the magnetic element 20 according to one embodiment of this disclosure, Figure 2 For illustration Figure 1 The diagram shows a schematic assembly of the magnetic element 20. As shown, the magnetic element 20 includes a winding structure 24, which includes a winding frame 30 and a plurality of windings 25. The winding frame 30 is made of an insulating material (e.g., bakelite) and includes two blades 35 and a winding shaft 33 connected between the two blades 35, with the windings 25 wound on the winding shaft 33. The winding frame 30 also has an axially extending through-hole 34 that passes through the winding shaft 33. At least one of the two blades 35 of the winding frame 30 includes a knot portion 36, which may include one or more grooves disposed along the edge of the blade 35. The magnetic element 20 also includes an iron core 23 disposed on the winding frame 30. Specifically, the iron core 23 is disposed around the winding frame 30, and a portion of the iron core 23 extends into the through-hole 34 of the winding frame 30. The iron core 23 can be composed of a first iron core component 21 and a second iron core component 22, which respectively abut against the two blades 35 of the winding frame 30 and are in contact with each other. In this embodiment, the magnetic element 20 is a transformer.
[0071] Please refer to the above as well. Figure 3 . Figure 3 For illustration Figure 2 The schematic cross-sectional view of the magnetic element 20 shown is located at the mark 3-3'. Figure 2 and Figure 3As shown, winding 25 includes a first winding 50 (marked with a slash) and a second winding 60 (marked with dots). The first winding 50 and the second winding 60 can be either a primary winding and a secondary winding, or both can be either a secondary winding and a primary winding. To make the first winding 50 and the second winding 60 easily distinguishable in the figure, the first winding 50 is marked with a slash, and the second winding 60 is marked with dots. In some embodiments, the first winding 50 includes a single conductor, and the second winding 60 also includes a single conductor. Depending on practical requirements, the first winding 50 and the second winding 60 may have the same or different wire diameters.
[0072] like Figure 2 and Figure 3 As shown, the first winding 50 includes a first lead end 51, a first segment 56, a second segment 57, a second lead end 52, and a fourth segment 54, while the second winding 60 includes a third lead end 63, a third segment 65, and a fourth lead end 64. The first winding 50 may include a conductor and an insulating layer for covering the conductor. The first segment 56, the second segment 57, and the fourth segment 54 are the portions of the conductor of the first winding 50 covered by the insulating layer, while the first lead end 51 and the second lead end 52 are the portions of the first winding 50 where the conductor is exposed at the end. Similarly, the second winding 60 may include a conductor and an insulating layer for covering the conductor. The third segment 65 is the portion of the second winding 60 where the conductor is covered by the insulating layer, while the third lead end 63 and the fourth lead end 64 are the portions of the second winding 60 where the conductor is exposed at the end. The first lead end 51, the second lead end 52, the third lead end 63 and the fourth lead end 64 can be connected to a power source or an electrical device and can be fixed to the knotting part 36 of the winding frame 30.
[0073] like Figure 2 and Figure 3 As shown, along the axial direction R, the winding shaft 33 includes a first segment 31 and a second segment 32 that do not overlap. The first lead end 51 of the first winding 50 is connected to one end of the first segment 56, which is wound around the first segment 31 of the winding shaft 33. The second segment 57 of the first winding 50 is wound around the second segment 32 of the winding shaft 33, and one end of the second segment 57 is connected to the second lead end 52. The fourth segment 54 of the first winding 50 is connected between the end of the first segment 56 away from the first lead end 51 and the end of the second segment 57 away from the second lead end 52. The third lead end 63 of the second winding 60 is connected to one end of the third segment 65, which is wound around the second segment 32 of the winding shaft 33 and stacked with the second segment 57 of the first winding 50. The other end of the third segment 65 is connected to the fourth lead end 64. With the above configuration, the magnetic element 20 can achieve high power density and easily control leakage inductance when used as a transformer, meeting the power demand of high wattage.
[0074] like Figure 2 and Figure 3 As shown, in this embodiment, the second segment 57 of the first winding 50 is stacked on the side of the third segment 65 of the second winding 60 away from the winding shaft 33. In some embodiments, the winding structure may further include insulating tape disposed around the outer peripheral surfaces of the first winding 50 and the second winding 60. In some embodiments, insulating tape may also be disposed between the second segment 57 of the first winding 50 and the third segment 65 of the second winding 60.
[0075] like Figure 2 and Figure 3 As shown, the first segment 56, the second segment 57, and the third segment 65 can be arranged in one or more layers along the axial direction R and in the radial direction perpendicular to the axial direction R. In this embodiment, the third segment 65 has more turns than the first segment 56 and also more turns than the second segment 57 along the axial direction R. Correspondingly, the second section 32 of the winding shaft 33 is wider than the first section 31 along the axial direction R. In other embodiments, the third segment 65 may have fewer turns than the first segment 56. Correspondingly, the first section 31 may be wider than the second section 32.
[0076] like Figure 2 and Figure 3 As shown, in some embodiments, the length of the first segment 56 is greater than the length of the second segment 57; in other words, the length of the portion of the first winding 50 wound around the first section 31 of the winding shaft 33 is greater than the length of the portion of the first winding 50 wound around the second section 32 of the winding shaft 33. In some embodiments, the length of the second segment 57 is less than the length of the third segment 65; in other words, the length of the portion of the first winding 50 wound around the second section 32 of the winding shaft 33 is less than the length of the portion of the second winding 60 wound around the second section 32 of the winding shaft 33.
[0077] like Figure 2 and Figure 3 As shown, in some embodiments, the second line segment 57 has a first winding width W1 along the axial direction R of the winding shaft 33, and the third line segment 65 has a second winding width W2 along the axial direction R, wherein the second winding width W2 is greater than the first winding width W1. In some embodiments, the vertical projected area of the second line segment 57 on the winding shaft 33 is smaller than the vertical projected area of the third line segment 65 on the winding shaft 33.
[0078] like Figure 2 and Figure 3As shown, in this embodiment, the magnetic element 20 exits from below, and its four lead ends are fixed to the junction portion 36 of the blade 35 adjacent to the second section 32. In other embodiments, the magnetic element 20 may exit from above, and its four lead ends may be fixed to the junction portion 36 of the blade 35 adjacent to the first section 31.
[0079] Please refer to Figure 4 . Figure 4 This is a perspective view illustrating a winding frame 30A according to another embodiment of the present disclosure. Compared to the aforementioned embodiment, the winding frame 30A of this embodiment further includes a partition 37, which is disposed on the winding shaft 33 and separates the first section 31 and the second section 32 of the winding shaft 33 to form a first winding groove 91 and a second winding groove 92 located on both sides of the partition 37. The partition 37 may have a slot-crossing portion 38 and a wire-guiding portion 39. The slot-crossing portion 38 may be a notch, through hole, or groove for the winding to pass through. The wire-guiding portion 39 may also include one or more notches, through holes, or grooves for fixing the lead ends of the winding. The wire-binding portion 36 of the blade 35 and the wire-guiding portion 39 of the partition 37 may be located on the same side of the winding frame 30, while the slot-crossing portion 38 and the wire-guiding portion 39 may be located on opposite sides of the partition 37 (e.g., opposite sides). In other embodiments, the wire-tying portion 36 of the blade 35 and the wire-guiding portion 39 of the partition 37 may also be located on opposite sides of the winding frame 30.
[0080] Please refer to Figures 5 to 7 . Figure 5 To illustrate a schematic front view of a magnetic element 20A according to another embodiment of this disclosure, wherein the magnetic element 20A includes Figure 4 The winding frame 30A shown is... Figure 6 For illustration Figure 5 The schematic rear view of the magnetic element 20A shown is shown, while Figure 7 For illustration Figure 5 The diagram shows a schematic cross-sectional view of the magnetic element 20A at the marked line segment 7-7'. As shown, in this embodiment, the first line segment 56 of the first winding 50 is disposed in the first winding slot 91, and the second line segment 57 of the first winding 50 and the third line segment 65 of the second winding 60 are stacked and disposed in the second winding slot 92. The fourth line segment 54 of the first winding 50 passes through the partition 37 via the slot-crossing portion 38; therefore, the fourth line segment 54 and the wire-arranging portion 39 are located on different sides of the partition 37.
[0081] like Figures 5 to 7As shown, in this embodiment, the number of turns in the third segment 65 is greater than the number of turns in the first segment 56 and also greater than the number of turns in the second segment 57 along the axial direction R. Correspondingly, the second winding groove 92 of the winding frame 30 is wider than the first winding groove 91 along the axial direction R. In other embodiments, the number of turns in the third segment 65 may be less than the number of turns in the first segment 56, and correspondingly, the first winding groove 91 may be wider than the second winding groove 92. Therefore, the position of the partition 37 can be adjusted according to the number of turns in the first segment 56, the second segment 57, and the third segment 65; it can be located in the exact center or offset to one side.
[0082] like Figures 5 to 7 As shown, in this embodiment, the magnetic element 20A exits from below. The first lead end 51 passes through the first winding groove 91 and is fixed to the wire management portion 39 of the partition 37 and the wire knotting portion 36 of the blade 35 adjacent to the second winding groove 92. The second lead end 52, the third lead end 63 and the fourth lead end 64 pass through the second winding groove 92 and are fixed to the wire knotting portion 36 of the blade 35 adjacent to the second winding groove 92 and are separated from the wire management portion 39 of the partition 37.
[0083] Please refer to Figure 8 . Figure 8 A schematic cross-sectional view of the magnetic element 20B according to another embodiment of this disclosure is shown. Unlike the design of the partition 37 having a slot-crossing portion 38 in the previous embodiment, in this embodiment, the distance by which the partition 37B of the winding frame 30B protrudes from the winding shaft 33 is partially reduced (e.g., one side of the partition 37B is cut off) to facilitate the passage of the winding. Specifically, in the radial direction, the partition 37B protrudes from the winding shaft 33 at a first position P1 by a first distance and at a second position P2 by a second distance, the second distance being less than the first distance. The fourth segment 54 of the first winding 50 extends from the second position P2 through the partition 37B to allow the first winding 50 to be wound simultaneously in the first winding slot 91 and the second winding slot 92.
[0084] Please refer to Figure 9 . Figure 9 The following is a schematic front view illustrating a magnetic element 20C according to another embodiment of this disclosure. In this embodiment, the magnetic element 20C has wires extending from above. The first lead end 51 passes through the first winding groove 91 and is fixed to the knotting portion 36 of the blade 35 adjacent to the first winding groove 91 and separated from the wire management portion 39 of the partition plate 37. The second lead end 52, the third lead end 63, and the fourth lead end 64 pass through the second winding groove 92 and are fixed to the wire management portion 39 of the partition plate 37 and the knotting portion 36 of the blade 35 adjacent to the first winding groove 91.
[0085] Please refer to Figure 10 and Figure 11 . Figure 10To illustrate a schematic front view of a magnetic element 20D according to another embodiment of this disclosure, Figure 11 For illustration Figure 10 The magnetic element 20D shown is a schematic cross-sectional view at the mark 11-11'. This embodiment is similar to... Figure 2 and Figure 3 The difference in the illustrated embodiment is that the third segment 65 of the second winding 60 is overlapped on the side of the second segment 57 of the first winding 50 away from the winding shaft 33. This also helps to achieve a transformer with high power density and easy control of leakage inductance, meeting the power demand for high wattage. In addition, some of the variations mentioned above are also applicable to this embodiment, such as the winding frame may include a partition, and the magnetic element 20D may be redirected to exit from the top.
[0086] Please refer to Figure 12 . Figure 12 A schematic cross-sectional view of the magnetic element 20E according to another embodiment of this disclosure is shown. The difference between this embodiment and the previous embodiment is that the third segment 65 of the second winding 60 is arranged in two layers with different distances from the winding shaft 33, and the second segment 57 of the first winding 50 is disposed between the two layers of the third segment 65. This also helps to achieve a transformer with high power density and easy control of leakage inductance, meeting the power demand for high wattage. Furthermore, some of the variations mentioned above are also applicable to this embodiment; for example, the winding frame may include a partition, and the magnetic element 20E may exit from the top or bottom.
[0087] Please refer to Figure 13 . Figure 13 A graph illustrating the magnetomotive force (MOF) of the magnetic element disclosed herein is provided. The magnetic element disclosed herein exhibits partial MOF cancellation (mmf on the horizontal axis) due to the partial overlap of the first winding 50 and the second winding 60, thereby reducing its leakage inductance to meet product requirements. Leakage inductance L s Energy W from the upper and lower tanks p W s (Taking the example of primary winding in the upper slot and secondary winding in the lower slot) and insulation layer energy W i The sum is the total energy W total The formula is derived as follows: (1) W p =μ0*l p_av *N p *l α *(n*k mmf 2 )*I rms 2 / 6 / l T (2)W S =μ0*l S_av *N S *l β *(n*k mmf2 )*I rms 2 / 6 / l T (3)W i =μ0*l γ_av *N P *l σ *(n*k mmf 2 )*I rms 2 / 2 / l T (4)W total =W p +W s +W i =0.5*L s *I rms 2 Based on the above formula, leakage inductance is related to the average winding length l. p_av l s_av l γ_av The number of turns N in the primary winding p The number of turns N in the secondary winding S , slot width l α l β l σ The total number of winding layers n, and the square of the magnetomotive force between layers k. mmf 2 and the square of the effective value current I rms 2 Proportional to, and with the total groove width l T Inversely proportional. Based on the above formula, various parameters can be adjusted according to the product's requirements for leakage inductance to design a suitable winding structure and magnetic components.
[0088] In summary, the disclosed winding structure includes a winding frame and a first winding and a second winding wound on the winding frame. The first winding is partially wound on a first section of the winding shaft of the winding frame and partially wound on a second section of the winding shaft. The second winding is wound on a second section of the winding shaft and stacked with a portion of the first winding. This configuration facilitates the realization of a transformer with high power density and easily controllable leakage inductance.
[0089] Although this disclosure has been presented above with reference to embodiments, it is not intended to limit this disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the claims.
Claims
1. A winding structure, characterized in that, Include: A winding frame includes two blades and a winding shaft connected between the two blades, the winding shaft including a first section and a second section; A first winding includes a first lead end, a first segment, a second segment, a second lead end, and a fourth segment. The first lead end is connected to one end of the first segment. The first segment is wound around a first section of the winding shaft. The second segment is wound around a second section of the winding shaft. One end of the second segment is connected to the second lead end. The fourth segment is connected between the first segment and the second segment. A second winding includes a third lead end, a third line segment, and a fourth lead end. The third lead end is connected to one end of the third line segment. The third line segment is wound around the second section of the winding shaft and stacked with the second line segment of the first winding. The other end of the third line segment is connected to the fourth lead end.
2. The winding structure as described in claim 1, characterized in that, The winding frame further includes a partition disposed on the winding shaft and separating the first section and the second section of the winding shaft to form a first winding groove and a second winding groove on both sides of the partition. The first wire segment is disposed in the first winding groove, the second wire segment and the third wire segment are disposed in the second winding groove, and the fourth wire segment passes through the partition or passes through one side of the partition.
3. The winding structure as described in claim 2, characterized in that, The partition has a cross-slot portion that connects the first winding slot and the second winding slot and allows the fourth segment of the first winding to pass through. The cross-slot portion is a notch, a through hole, or a groove.
4. The winding structure as described in claim 2, characterized in that, The partition protrudes from the winding shaft at a first position by a first distance and at a second position by a second distance, the second distance being less than the first distance, and the fourth line segment extends through the partition from the second position.
5. The winding structure as described in claim 2, characterized in that, One of the two blades has a knotting portion, and the partition has a thread-guiding portion. The knotting portion and the thread-guiding portion are located on the same side of the winding frame.
6. The winding structure as described in claim 5, characterized in that, At least one of the first lead end, the second lead end, the third lead end, and the fourth lead end passes through the first winding groove or the second winding groove and is fixed to the wire management portion and the wire knotting portion. The remaining one of the first lead end, the second lead end, the third lead end, and the fourth lead end passes through the first winding groove or the second winding groove and is fixed to the wire knotting portion and is separated from the wire management portion.
7. The winding structure as described in claim 5, characterized in that, The fourth segment of the first winding is located on a different side of the partition from the wire management section.
8. The winding structure as described in claim 1, characterized in that, The length of the first line segment is greater than the length of the second line segment.
9. The winding structure as described in claim 1, characterized in that, The length of the second line segment is less than the length of the third line segment.
10. The winding structure as described in claim 1, characterized in that, The second line segment has a first winding width along one axis of the winding shaft, and the third line segment has a second winding width along the same axis, the second winding width being greater than the first winding width.
11. The winding structure as described in claim 1, characterized in that, The second segment is superimposed on the side of the third segment away from the winding shaft, or the third segment is superimposed on the side of the second segment away from the winding shaft.
12. The winding structure as described in claim 1, characterized in that, The third line segment is arranged in two layers with a distance different from that of the winding shaft, and the second line segment is placed between the two layers.
13. A magnetic element, characterized in that, Include: A winding structure as described in any one of claims 1 to 12; and An iron core is mounted on the winding frame of the winding structure.