Winding method of winding and magnetic integrated device
By cross-winding the primary and secondary windings in double layers on different segments of the magnetic column, the problems of eddy current effect and inductance imbalance in LLC topology transformers are solved, and current sharing and temperature control of the secondary winding are achieved, thus improving the performance of magnetic integrated devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-03-27
AI Technical Summary
In the prior art, the winding structure of LLC topology transformers leads to severe eddy current effects, uneven inductance in the secondary winding, resulting in local temperature rise and affecting the performance of magnetic integrated devices.
A cross-double-layer winding method is adopted, in which the primary and secondary windings are wound on the first and second segments of the magnetic column respectively to ensure that they do not overlap. The inductance of the secondary winding is balanced by the number of turns design, the number of coils is reduced, and the magnetic field coupling is enhanced.
It effectively reduces eddy current losses, balances the inductance of the secondary winding, prevents local temperature rise, improves magnetic field coupling, reduces leakage inductance, optimizes the magnetic circuit, and reduces losses and size.
Smart Images
Figure CN121748160A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of windings in magnetic integrated devices, and more specifically, to a winding method and a magnetic integrated device. Background Technology
[0002] In LLC topology, for Figure 1 The transformer winding topology shown uses a magnetically integrated scheme that leverages the transformer's leakage inductance as a resonant inductor, separating the three coil sections via a bobbin. Figure 1 Taking the winding shown as an example, the primary windings N1 and N2 on both sides each have 7 turns, wound in two layers: 4 turns in the inner layer and 3 turns in the outer layer. The secondary windings N3 and N4 in the middle are wound in two layers, with 5 turns in the inner layer and 5 turns in the outer layer. However, the leakage magnetic field of this winding structure is distributed throughout the entire magnetic component space. The high-frequency changing magnetic field generates eddy current effects, and due to the poor coupling between the secondary windings and the primary windings, the current flowing through different secondary windings varies greatly, which can easily cause local temperature rise and thus damage the performance of the magnetic integrated device. Summary of the Invention The technical problem to be solved by the present invention is to provide a winding method and a magnetic integrated device that can reduce the eddy current effect and balance the inductance of the secondary winding, thereby equalizing the current in the secondary winding and preventing local temperature rise.
[0003] The technical solution adopted by this invention to solve its technical problem is: constructing a winding method, wherein the winding includes a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding, and the method includes: The first primary winding is wound in two layers on the first segment of the magnetic column; The second primary winding, the first secondary winding, and the second secondary winding are wound in a double-layer cross configuration on the second segment of the magnetic column. The first segment and the second segment of the magnetic column do not overlap.
[0004] In the winding method of the present invention, the first primary winding includes a first sub-primary winding portion and a second sub-primary winding portion. The first primary winding is wound in two layers on the first segment of the magnetic post, including: The first primary winding portion is wound on the first segment of the magnetic column; The second primary winding portion is wound outside the first primary winding portion; The number of turns in the first primary winding portion and the second primary winding portion are equal.
[0005] In the winding method, the second primary winding comprises a third sub-primary winding part and a fourth sub-primary winding part; The first secondary winding comprises a first sub-secondary winding part and a second sub-secondary winding part; The second secondary winding comprises a third sub-secondary winding part and a fourth sub-secondary winding part; The second section comprises a first sub-section, a second sub-section and a third sub-section; The second primary winding, the first secondary winding and the second secondary winding are cross-double-layer wound on the second section of the magnetic column, comprising: The first sub-secondary winding part and the third sub-secondary winding part are double-layer wound on the first sub-section; The second sub-secondary winding part and the fourth sub-secondary winding part are side-by-side single-layer wound on the second sub-section; The third sub-primary winding part is single-layer wound on the outer layer of the second sub-secondary winding part and the fourth sub-secondary winding part of the second sub-section; The fourth sub-primary winding part is double-layer wound on the third sub-section; The first sub-section, the second sub-section and the third sub-section do not overlap with each other.
[0006] In the winding method, on the second sub-section, one turn of the fourth sub-secondary winding part is sandwiched between every two turns of the second sub-secondary winding part; and one turn of the second sub-secondary winding part is sandwiched between every two turns of the fourth sub-secondary winding part.
[0007] In the winding method, the first secondary winding and the second secondary winding each comprise a B-turn winding; and the primary winding comprises an A-turn winding; The first primary winding comprises an A1-turn winding, and the second primary winding comprises an A2-turn winding, wherein A1+A2=A; The first sub-primary winding part comprises a C1-turn winding, the second sub-primary winding part comprises a C2-turn winding, the third sub-primary winding part comprises a C3-turn winding, and the fourth sub-primary winding part comprises a C4-turn winding; wherein C1+C2+C3+C4=A; The first sub-secondary winding part comprises a D1-turn winding, the second sub-secondary winding part comprises a D2-turn winding, the third sub-secondary winding part comprises a D3-turn winding, and the fourth sub-secondary winding part comprises a D4-turn winding; wherein D1+D2+D3+D4+D4 =2B; Wherein A, B, A1, A2, C1, C2, C3, C4, D1, D2, D3, D4 are all positive integers; C1=C2, D1= D3, D2=D4.
[0008] In the winding method, A=14x, B=5x, A1=6x, A2=8x, C1=C2=3x, C3=6x, C4=2x, D1=D3=2x, D2=D4=4x; wherein x is a positive integer.
[0009] Another technical solution adopted by the application to solve its technical problems is to construct a magnetic integrated device, comprising a magnetic column, a first primary winding, a second primary winding, a first secondary winding and a second secondary winding; the first primary winding is double-layer wound on the first segment of the magnetic column; the second primary winding, the first secondary winding and the second secondary winding are cross double-layer wound on the second segment of the magnetic column; the first segment of the magnetic column and the second segment of the magnetic column do not overlap with each other.
[0010] In the magnetic integrated device, the first primary winding comprises a first sub-primary winding part and a second sub-primary winding part; the second primary winding comprises a third sub-primary winding part and a fourth sub-primary winding part; the first secondary winding comprises a first sub-secondary winding part and a second sub-secondary winding part; the second secondary winding comprises a third sub-secondary winding part and a fourth sub-secondary winding part; the second segment comprises a first sub-segment, a second sub-segment and a third sub-segment; The first sub-primary winding part is wound on the first segment of the magnetic column; the second sub-primary winding part is wound outside the first sub-primary winding part; the number of turns of the first sub-primary winding part and the second sub-primary winding part is equal; The first sub-secondary winding part and the third sub-secondary winding part are double-layer wound on the first sub-segment; the second sub-secondary winding part and the fourth sub-secondary winding part are side-by-side single-layer wound on the second sub-segment; the third sub-primary winding part is single-layer wound outside the second sub-secondary winding part and the fifth sub-secondary winding part of the second sub-segment; the fourth sub-primary winding part is double-layer wound on the third sub-segment; the first sub-segment, the second sub-segment and the third sub-segment do not overlap with each other.
[0011] In the magnetic integrated device, the first secondary winding and the second secondary winding each comprise a B-turn winding; the primary winding comprises an A-turn winding; The first primary winding comprises an A1-turn winding, and the second primary winding comprises an A2-turn winding, wherein A1+A2=A; The first sub-primary winding part comprises C1 turns of winding, the second sub-primary winding part comprises C2 turns of winding, the third sub-primary winding part comprises C3 turns of winding, and the fourth sub-primary winding part comprises C4 turns of winding; wherein C1+C2+C3+C4=A; The first sub-secondary winding part comprises D1 turns of winding, the second sub-secondary winding part comprises D2 turns of winding, the third sub-secondary winding part comprises D3 turns of winding, and the fourth sub-secondary winding part comprises D4 turns of winding; wherein D1+D2+D3+D4+D4 =2B; Wherein, A=14x, B=5x, A1=6x, A2=8x, C1=C2=3x, C3=6x, C4=2x, D1=D3=2x, D2=D4=4x; wherein x is a positive integer.
[0012] In the magnetic integrated device, the magnetic integrated device is a magnetic integrated transformer, the first primary winding and the second primary winding are in series with each other, and the first secondary winding and the second secondary winding are in parallel with each other.
[0013] The winding method and the magnetic integrated device have the following advantages: the first primary winding is double-layer wound on the first section of the magnetic column; the second primary winding, the first secondary winding and the second secondary winding are cross double-layer wound on the second section of the magnetic column; the first section of the magnetic column and the second section of the magnetic column do not overlap with each other, so that one wire package is formed on each of the first section and the second section of the magnetic column, thereby reducing the number of wire packages; the double-layer winding of the first primary winding on the second section of the magnetic column can enhance the magnetic field coupling between the primary winding and the secondary winding, reduce the leakage inductance and reduce the eddy current loss; the cross double-layer winding of the second primary winding, the first secondary winding and the second secondary winding on the second section of the magnetic column can further enhance the magnetic field coupling between the primary winding and the secondary winding, thereby balancing the inductance of the secondary winding, evenly flowing the secondary winding and preventing local temperature rise. BRIEF DESCRIPTION OF DRAWINGS
[0014] The application will be further described below in conjunction with the drawings and examples, wherein: Figure 1 is a transformer winding topology circuit of the prior art; Figure 2 is a flowchart of the winding method of the application; Figure 3 is a structural schematic diagram of the magnetic integrated device wound by the winding method of the application; Figure 4 is Figure 3 is a winding diagram of the primary winding of the magnetic integrated device shown in FIG. 6; Figure 5 isFigure 3 A winding diagram of the secondary winding of the magnetic integrated device shown; Figure 6 is Figure 3 A winding diagram of the primary winding and the secondary winding of the magnetic integrated device shown; Figures 7A-7B is a simulation data graph of the magnetic integrated device of the prior art; Figures 7C-7D is Figure 3 is a simulation data graph of the magnetic integrated device shown; Figure 8A is a position diagram of the magnetic integrated device housing of the prior art; Figure 8B is Figure 3 is a position diagram of the magnetic integrated device housing shown; Figure 9A is an electric field intensity diagram of the surface of the magnetic integrated device housing when the magnetic integrated device of the prior art is used; Figure 9B is Figure 3 is an electric field intensity diagram of the surface of the magnetic integrated device housing shown; Figure 10A is a vector diagram of the electric field intensity of the surface of the magnetic integrated device housing when the magnetic integrated device of the prior art is used; Figure 10B is a vector diagram of the electric field intensity of the surface of the magnetic integrated device shown; Figure 3 is an electric field intensity diagram of the back of the magnetic integrated device housing when the magnetic integrated device of the prior art is used; Figure 11A is Figure 11B is an electric field intensity diagram of the back of the magnetic integrated device housing shown; Figure 3 is a total electric field intensity diagram when the magnetic integrated device of the prior art is used; Figure 12A is Figure 12B is a total electric field intensity diagram when the magnetic integrated device shown is used. Figure 3 DETAILED DESCRIPTION
[0015] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.
[0016] Figure 2 is a flow chart of the winding winding method of the present application. The method is suitable for Figure 1 the transformer winding topology circuit shown. As Figure 1 As shown, the transformer T1 includes a primary winding and a secondary winding; wherein the winding includes a first primary winding N1 and a second primary winding N2 in series with each other, and the secondary winding includes a first secondary winding N3 and a second secondary winding N4 in series with each other. In a preferred embodiment of the present application, the first primary winding N1 and the second primary winding N2, the first secondary winding N3 and the second secondary winding N4 are connected in series by PCB copper skin respectively. In a preferred embodiment of the present application, each winding can be a single winding or a plurality of sub-windings connected in series.
[0017] In step S1, the first primary winding N1 is double-layer wound on the first section of the magnetic column. In a preferred embodiment of the present application, the first primary winding N1 includes a first sub-primary winding portion N11 and a second sub-primary winding portion N12; the first sub-primary winding portion N11 is wound on the first section of the magnetic column; the second sub-primary winding portion N12 is wound outside the first sub-primary winding portion N11; the number of turns of the first sub-primary winding portion N11 and the second sub-primary winding portion N12 are equal.
[0018] In step S2, the second primary winding N2, the first secondary winding N3 and the second secondary winding N4 are cross double-layer wound on the second section of the magnetic column; the first section of the magnetic column and the second section of the magnetic column do not overlap with each other. In a preferred embodiment of the present application, the second primary winding N2 includes a third sub-primary winding portion N21 and a fourth sub-primary winding portion N22; the first secondary winding N3 includes a first sub-secondary winding portion N31 and a second sub-secondary winding portion N32; the second secondary winding N4 includes a third sub-secondary winding portion N41 and a fourth sub-secondary winding portion N42. The second section includes a first sub-section, a second sub-section and a third sub-section.
[0019] The first sub-secondary winding portion N31 and the third sub-secondary winding portion N41 are double-layer wound on the first sub-section; the second sub-secondary winding portion N32 and the fourth sub-secondary winding portion N42 are single-layer wound side by side on the second sub-section. The third sub-primary winding portion N21 is single-layer wound outside the second sub-secondary winding portion N32 and the fourth sub-secondary winding portion N42 of the second sub-section. The fourth sub-primary winding portion N22 is double-layer wound on the third sub-section; the first sub-section, the second sub-section and the third sub-section do not overlap with each other. On the second sub-section, one turn of the fourth sub-secondary winding portion N42 is sandwiched between every two turns of the second sub-secondary winding portion N32; one turn of the second sub-secondary winding portion N32 is sandwiched between every two turns of the fourth sub-secondary winding portion N42.
[0020] In the preferred embodiment of the present application, the first secondary winding N3 and the second secondary winding N4 each comprise B turns of winding; the primary winding comprises A turns of winding; the first primary winding N1 comprises A1 turns of winding, and the second primary winding N2 comprises A2 turns of winding, wherein A1+A2=A. The first sub-primary winding part comprises C1 turns of winding, the second sub-primary winding part comprises C2 turns of winding, the third sub-primary winding part comprises C3 turns of winding, and the fourth sub-primary winding part comprises C4 turns of winding; wherein C1+C2+C3+C4=A; the first sub-secondary winding part comprises D1 turns of winding, the second sub-secondary winding part comprises D2 turns of winding, the third sub-secondary winding part comprises D3 turns of winding, and the fourth sub-secondary winding part comprises D4 turns of winding; wherein D1+D2+D3+D4+D4 =2B; wherein A, B, A1, A2, C1, C2, C3, C4, D1, D2, D3, D4 are positive integers; C1=C2, D1=D4=D3=D6, C1=C2, D1=D3, D2=D4.
[0021] In the preferred embodiment of the present application, A=14x, B=5x, A1=6x, A2=8x, C1=C2=3x, C3=6x, C4=2x, D1=D3=2x, D2=D4=4x; wherein x is a positive integer. In one preferred embodiment of the present application, the turns ratio of the transformer primary winding and secondary winding is 14:5:5, i.e. the sum of the turns of the first primary winding N1 and the second primary winding N2 is 14 turns; the turns of the first secondary winding N3 and the second secondary winding N4 are 5 turns respectively.
[0022] The winding method of the present application is used for winding, and the process is as follows.
[0023] The first primary winding N1 is wound in double layers on the first section of the magnetic column. That is, the first sub-primary winding part N11 is wound on the first section of the magnetic column; the second sub-primary winding part N12 is wound outside the first sub-primary winding part N11; the turns of the first sub-primary winding part N11 and the second sub-primary winding part N12 are equal, i.e. 3 turns of the first sub-primary winding part N11 are wound on the first section of the magnetic column, and then 3 turns of the second sub-primary winding part N12 are wound outside the first sub-primary winding part N11, i.e. 6 turns of the first primary winding N1 are wound in double layers, 3 turns in the outer layer and 3 turns in the inner layer.
[0024] The second primary winding N2, the first secondary winding N3 and the second secondary winding N4 are cross-bifilar wound on the second section of the magnetic column. Specifically, the first sub-secondary winding portion N31 and the third sub-secondary winding portion N41 are bifilar wound on the first sub-section of the second section; the second sub-secondary winding portion N32 and the fourth sub-secondary winding portion N42 are single-layer wound side by side on the second sub-section of the second section; the third sub-primary winding portion N21 is single-layer wound on the outer layer of the second sub-secondary winding portion N32 and the fourth sub-secondary winding portion N42 of the second sub-section; the fourth sub-primary winding portion N22 is bifilar wound on the third sub-section.
[0025] That is, on the second section of the magnetic column, 2 turns of the first sub-secondary winding portion N31 and 2 turns of the fourth sub-secondary winding portion N42 are cross-overlapped wound on the first sub-section of the second section, and then 4 turns of the second sub-secondary winding portion N32 and 4 turns of the fourth sub-secondary winding portion N42, a total of 8 turns, are directly wound on the second section of the magnetic column as the inner layer of the winding. One turn of the fourth sub-secondary winding portion N42 is sandwiched between every two turns of the second sub-secondary winding portion N32; one turn of the second sub-secondary winding portion N32 is sandwiched between every two turns of the fourth sub-secondary winding portion N42. 6 turns of the third sub-primary winding portion N21 are wound on the outer layer of the 4 turns of the second sub-secondary winding portion N32 and the 4 turns of the fourth sub-secondary winding portion N42 (a total of 8 turns), and 2 turns of the fourth sub-primary winding portion N22 are bifilar wound on the third sub-section.
[0026] It should be noted that although the above description is based on A=14, B=5, A1=6, A2=8, C1=C2=3, C3=6, C4=2, D1=D3=1, D2=D4=4, i.e. x=1. However, those skilled in the art understand that x can be any positive integer, and the effect is exactly the same. In addition, in other preferred embodiments of the present application, A1, A2, C1, C2, C3, C4, D1, D2, D3, D4 are all positive integers and C1=C2, D1=D4=D3=D6, C1=C2, D1=D3, D2=D4, which can be selected by those skilled in the art according to actual needs.
[0027] In further preferred embodiments of the present application, the winding method of the present application can be used to wind a magnetic integrated device, such as a magnetic integrated transformer, a general transformer or an inductor.
[0028] The winding winding method and the magnetic integrated device of the present application, the first primary winding is wound on the first section of the magnetic column; the second primary winding, the first secondary winding and the second secondary winding are cross double-layer wound on the second section of the magnetic column; the first section of the magnetic column and the second section of the magnetic column do not overlap with each other, so that a wire package is formed on the first section and the second section of the magnetic column respectively, thereby reducing the number of wire packages, and the double-layer winding of the first primary winding on the second section can enhance the magnetic field coupling of the primary and secondary windings, reduce the leakage inductance and reduce the eddy current loss; the cross double-layer winding of the second primary winding, the first secondary winding and the second secondary winding on the second section of the magnetic column can further enhance the magnetic field coupling of the primary winding and the secondary winding, thereby balancing the inductance of the secondary winding, and then balancing the current of the secondary winding, preventing local temperature rise.
[0029] Figures 3-6 The magnetic integrated device wound by the winding winding method of the present application is shown. As shown in Figures 3-6 , the magnetic integrated device comprises a magnetic column 10, a first primary winding N1, a second primary winding N2, a first secondary winding N3 and a second secondary winding N4; the first primary winding N1 is double-layer wound on the first section of the magnetic column 10; the second primary winding N2, the first secondary winding N3 and the second secondary winding N4 are cross double-layer wound on the second section of the magnetic column 10; the first section of the magnetic column 10 and the second section of the magnetic column 10 do not overlap with each other.
[0030] As shown in Figures 3-6 , the first primary winding N1 comprises a first sub-primary winding part N11 and a second sub-primary winding part N12; the second primary winding N2 comprises a third sub-primary winding part N21 and a fourth sub-primary winding part N22; the first secondary winding N3 comprises a first sub-secondary winding part N31 and a second sub-secondary winding part N32; the second secondary winding N4 comprises a third sub-secondary winding part N33 and a fourth sub-secondary winding part N42; the second section comprises a first sub-section, a second sub-section and a third sub-section.
[0031] The first primary winding portion N11 is wound on the first segment of the magnetic post 10; the second primary winding portion N12 is wound outside the first primary winding portion N11; the first primary winding portion N11 and the second primary winding portion N12 have the same number of turns; the first secondary winding portion N31 and the third secondary winding portion N41 are double-layered on the first segment; the second secondary winding portion N32 and the fourth secondary winding portion N42 are single-layered side-by-side on the second segment; the third primary winding portion N21 is single-layered on the outer layer of the second secondary winding portion N32 and the fourth secondary winding portion N42 on the second segment; the fourth primary winding portion N22 is double-layered on the fourth segment; the first segment, the second segment, and the third segment do not overlap each other.
[0032] exist Figures 3-6 In the preferred embodiment shown, the sum of the number of turns in the first primary winding N1 and the second primary winding N2 is 14 turns; the number of turns in the first secondary winding N3 and the second secondary winding N4 are each 5 turns. The first sub-primary winding portion N11 includes 3 turns, the second sub-primary winding portion N12 includes 3 turns, the third sub-primary winding portion N21 includes 6 turns, and the fourth sub-primary winding portion N22 includes 2 turns; the first sub-secondary winding portion N31 includes 2 turns, the second sub-secondary winding portion N32 includes 4 turns, the third sub-secondary winding portion N41 includes 2 turns, and the fourth sub-secondary winding portion N42 includes 4 turns.
[0033] In a preferred embodiment of the present invention, the magnetic integrated device is a magnetic integrated transformer, wherein the first primary winding N1 and the second primary winding N2 are connected in series, preferably through PCB copper foil; and the first secondary winding N3 and the second secondary winding N4 are connected in parallel.
[0034] Figures 7A-7B This is a simulation data diagram of existing magnetic integrated devices. Figures 7C-7D yes Figure 3 The simulation data diagram of the magnetic integrated device is shown. Figure 8A This is a schematic diagram showing the location of the housing of a magnetic integrated device in the prior art. Figure 8B yes Figure 3 The diagram shows the location of the housing of the magnetic integrated device. Figure 9A This is a schematic diagram of the electric field intensity on the surface of the housing of a magnetic integrated device using existing technology. Figure 9B yes Figure 3 The diagram shows the electric field intensity on the surface of the housing of the magnetic integrated device. Figure 10A This is a vector diagram showing the electric field strength on the surface of the housing of a magnetically integrated device using existing technology.Figure 10B is the vector diagram of the electric field intensity on the surface of the magnetic integrated device shown in Figure 3 Figure 11A is the vector diagram of the electric field intensity on the surface of the magnetic integrated device shown in Figure 11B is the vector diagram of the electric field intensity on the surface of the magnetic integrated device shown in Figure 3 Figure 12A is the vector diagram of the electric field intensity on the surface of the magnetic integrated device shown in Figure 12B Figure 3 is the vector diagram of the electric field intensity on the surface of the magnetic integrated device shown in
[0035] In the case of installing the prior art magnetic integrated device and the magnetic integrated device shown in Figure 3 on the same cabinet respectively, and calculating the eddy current loss generated by the leakage magnetic field on the material by using magnetic simulation software, the results obtained are shown in Figures 7A-7D Figure 3 The self-inductance of the primary winding of the prior art magnetic integrated device and the magnetic integrated device shown in is 62.51uH and 62.48uH respectively, which are basically consistent. However, the leakage inductance of the prior art magnetic integrated device is 15.96uH, and the cabinet eddy current loss is 19.44W; while the leakage inductance of the magnetic integrated device shown in is 7.1uH, and the cabinet eddy current loss is 10.24W, which is significantly reduced. Figure 3
[0036] The coupling degree of the first secondary winding N3 and the second secondary winding N4 of the prior art magnetic integrated device with the primary winding is 0.863 and 0.866 respectively; Figure 3 The inductance of the first secondary winding N3 and the second secondary winding N4 of the magnetic integrated device shown in is 7.57uH and 7.75uH respectively, with a difference of 0.18uH(2.38%), and the difference in the inductance of the secondary winding is less than 0.3uH, accounting for less than 3%, which meets the design allowable deviation of 5%; while the coupling degree with the primary winding is 0.942 and 0.931 respectively, which significantly improves the coupling degree of the primary and secondary windings.
[0037] In order to facilitate further explanation, a specific moment is selected to analyze the electric field intensity distribution and vector direction on the surface of the cabinet, the electric field intensity distribution and vector direction on the back of the cabinet, and the electric field intensity distribution and vector direction of the overall section, and the results are shown in Figures 8A-12B
[0038] Using the magnetic integrated device of the prior art, three line packages are formed, and the three line packages have different electric field distribution directions, which reflects the enhancement of the local field strength; the electric field strength directly below the middle first secondary winding N3 and the second secondary winding N4 line package is obviously higher than that below the two sides of the first primary winding N1 and the second primary winding N2, and this trend is more obvious from the overall cross-sectional electric field strength vector diagram.
[0039] The magnetic integrated device wound by the winding method of the application, the first segment of the magnetic column is wound with the first sub-primary winding part N11, thus forming a first line package 11 on the first segment; the second sub-primary winding part N12 is wound outside the first sub-primary winding part N11; the first sub-secondary winding part N31 and the third sub-secondary winding part N41 are double-layer wound on the first sub-segment of the second segment; the second sub-secondary winding part N32 and the fourth sub-secondary winding part N42 are single-layer wound side by side on the second sub-segment of the second segment; the third sub-primary winding part N21 is single-layer wound outside the second sub-secondary winding part N32 and the fourth sub-secondary winding part N42 of the second sub-segment; and the fourth sub-primary winding part N22 is double-layer wound on the third sub-segment, thus forming a second line package 12 on the second segment. Therefore, compared with the three line packages of the prior art, the magnetic integrated device wound by the winding method of the application reduces the number of line packages. The first line package 11 is completely composed of primary windings, and the outer layer of the second line package 12 has only two turns of secondary windings, so that the primary-secondary magnetic field coupling is good and the leakage inductance is low. The cross double-layer winding of the second primary winding, the first secondary winding and the second secondary winding on the second segment of the magnetic column can further enhance the magnetic field coupling of the primary winding and the secondary winding, thereby balancing the inductance of the secondary winding, and further balancing the current of the secondary winding to prevent local temperature rise.
[0040] The magnetic integrated device wound by the winding method of the application adjusts the arrangement and position of the line packages, reduces the size of the leakage inductance, although the electric field strength corresponding to the outer layer secondary side is still a high part, but the new arrangement reduces the high strength area, the loss of the shell is reduced by 47.3%, and the eddy current effect is obviously reduced.
[0041] Through actual winding of the transformer, the leakage inductance of the traditional magnetic integration scheme is 17.3uH, the leakage inductance of the invention magnetic integration scheme is 7.4uH, and the absolute value of the secondary winding inductance deviation is 0.08-0.14uH. The actual measured shell temperature, the traditional scheme cannot be loaded at full power, and the shell temperature and winding current deviation of the invention scheme meet the design requirements when loaded at full power.
[0042] In combination Figures 8A-11BIt can be known that the magnetic integrated device wound by the winding winding method of the application adjusts the arrangement and position of the wire package, reduces the size of the leakage inductance, and reduces the eddy current effect on the shell. At the same time, through the magnetic integration technology, the leakage inductance of the transformer is used as the resonant inductance, the volume of the magnetic component is reduced, and the power density is improved.
[0043] The magnetic integrated device wound by the winding winding method of the application reduces three parts of the wire package to two parts, optimizes the magnetic circuit, improves the magnetic field distribution around the surrounding magnetic component, reduces the loss and volume, reduces the cost of the magnetic component, and a part of the whole is the primary winding, which is wound in two layers; the other part is the secondary winding, which is double-wound, the primary winding is 8 turns, the secondary winding is 10 turns, and the arrangement is cross, which reduces the leakage magnetic field, reduces the eddy current loss, the difference of the secondary inductance is small, and at the same time, the coupling degree of the primary and secondary windings is improved.
[0044] Although the application is described by specific embodiments, those skilled in the art should understand that various modifications and equivalent substitutions can be made to the application without departing from the scope of the application. In addition, various modifications can be made to the application for specific situations or materials without departing from the scope of the application. Therefore, the application is not limited to the disclosed specific embodiments, but should include all embodiments falling within the scope of the claims of the application.
[0045] The above is only the preferred embodiment of the application, and is not intended to limit the application. Any modification, equivalent substitution and improvement within the spirit and principles of the application should be included in the protection scope of the application. The above is only the preferred embodiment of the application, and is not intended to limit the application. Any modification, equivalent substitution and improvement within the spirit and principles of the application should be included in the protection scope of the application.
Claims
1. A winding winding method, the winding comprising a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding, characterized by, The method comprises: double-layer winding the first primary winding on a first section of a magnetic column; cross double-layer winding the second primary winding, the first secondary winding and the second secondary winding on a second section of the magnetic column; the first section of the magnetic column and the second section of the magnetic column do not overlap with each other.
2. The winding method according to claim 1, characterized in that, The first primary winding comprises a first sub-primary winding part and a second sub-primary winding part; double-layer winding the first primary winding on a first section of a magnetic column comprises: winding the first sub-primary winding part on the first section of the magnetic column; winding the second sub-primary winding part outside the first sub-primary winding part; the number of turns of the first sub-primary winding part and the second sub-primary winding part are equal.
3. The winding method according to claim 2, characterized in that, The second primary winding comprises a third sub-primary winding part and a fourth sub-primary winding part; The first secondary winding comprises a first sub-secondary winding part and a second sub-secondary winding part; The second secondary winding comprises a third sub-secondary winding part and a fourth sub-secondary winding part; The second section comprises a first sub-section, a second sub-section and a third sub-section; cross double-layer winding the second primary winding, the first secondary winding and the second secondary winding on a second section of the magnetic column comprises: double-layer winding the first sub-secondary winding part and the third sub-secondary winding part on the first sub-section; side-by-side single-layer winding the second sub-secondary winding part and the fourth sub-secondary winding part on the second sub-section; single-layer winding the third sub-primary winding part outside the second sub-secondary winding part and the fourth sub-secondary winding part of the second sub-section; double-layer winding the fourth sub-primary winding part on the third sub-section; the first sub-section, the second sub-section and the third sub-section do not overlap with each other.
4. The winding method according to claim 3, characterized in that, On the second sub-section, one turn of the fourth sub-secondary winding part is sandwiched between every two turns of the second sub-secondary winding part; one turn of the second sub-secondary winding part is sandwiched between every two turns of the fourth sub-secondary winding part.
5. The winding method according to claim 4, characterized in that, The first secondary winding and the second secondary winding each comprise B turns of winding; the primary winding comprises A turns of winding; The first primary winding comprises A1 turns of winding, and the second primary winding comprises A2 turns of winding, wherein A1+A2=A; The first sub-primary winding part comprises C1 turns of winding, the second sub-primary winding part comprises C2 turns of winding, the third sub-primary winding part comprises C3 turns of winding, and the fourth sub-primary winding part comprises C4 turns of winding; wherein C1+C2+C3+C4=A; The first sub-secondary winding part comprises D1 turns of winding, the second sub-secondary winding part comprises D2 turns of winding, the third sub-secondary winding part comprises D3 turns of winding, and the fourth sub-secondary winding part comprises D4 turns of winding; wherein D1+D2+D3+D4+D4 =2B; wherein A, B, A1, A2, C1, C2, C3, C4, D1, D2, D3, D4 are positive integers; C1=C2, D1= D3, D2=D4.
6. The winding method according to claim 5, wherein A=14x, B=5x, A1=6x, A2=8x, C1=C2=3x, C3=6x, C4=2x, D1=D3=2x, D2=D4=4x; wherein x is a positive integer.
7. A magnetic integrated device, characterized by The magnetic column, the first primary winding, the second primary winding, the first secondary winding and the second secondary winding; the first primary winding is double-layer wound on the first segment of the magnetic column; the second primary winding, the first secondary winding and the second secondary winding are cross double-layer wound on the second segment of the magnetic column; the first segment of the magnetic column and the second segment of the magnetic column do not overlap with each other.
8. The magnetic integrated device of claim 7, wherein, The first primary winding includes a first sub-primary winding part and a second sub-primary winding part; the second primary winding includes a third sub-primary winding part and a fourth sub-primary winding part; the first secondary winding includes a first sub-secondary winding part and a second sub-secondary winding part; the second secondary winding includes a third sub-secondary winding part and a fourth sub-secondary winding part; the second segment includes a first sub-segment, a second sub-segment and a third sub-segment; The first sub-primary winding part is wound on the first segment of the magnetic column; the second sub-primary winding part is wound outside the first sub-primary winding part; the number of turns of the first sub-primary winding part and the second sub-primary winding part is equal; The first sub-secondary winding part and the third sub-secondary winding part are double-layer wound on the first sub-segment; the second sub-secondary winding part and the fourth sub-secondary winding part are single-layer wound side by side on the second sub-segment; the third sub-primary winding part is single-layer wound outside the second sub-secondary winding part and the fifth sub-secondary winding part of the second sub-segment; the fourth sub-primary winding part is double-layer wound on the third sub-segment; the first sub-segment, the second sub-segment and the third sub-segment do not overlap with each other.
9. The magnetic integrated device of claim 8, wherein, The first secondary winding and the second secondary winding respectively include B-turn windings; the primary winding includes A-turn windings; The first primary winding includes A1-turn windings, and the second primary winding includes A2-turn windings, wherein A1+A2=A; The first sub-primary winding part includes C1-turn windings, the second sub-primary winding part includes C2-turn windings, the third sub-primary winding part includes C3-turn windings, and the fourth sub-primary winding part includes C4-turn windings; wherein C1+C2+C3+C4=A; The first sub-secondary winding part includes D1-turn windings, the second sub-secondary winding part includes D2-turn windings, the third sub-secondary winding part includes D3-turn windings, and the fourth sub-secondary winding part includes D4-turn windings; Wherein D1+D2+D3+D4+D4 =2B; A=14x, B=5x, A1=6x, A2=8x, C1=C2=3x, C3=6x, C4=2x, D1=D3=2x, D2=D4=4x; wherein x is a positive integer.
10. The magnetic integrated device of claim 9, wherein, The magnetic integrated device is a magnetic integrated transformer, the first primary winding and the second primary winding are in series with each other, and the first secondary winding and the second secondary winding are in parallel with each other.