High-efficiency parallel primary-side chip-type transformer winding structure with reusable characteristic

Abstract

The invention discloses a high-efficiency parallel primary side chip transformer winding structure with a reusable characteristic, which comprises a reusable section and an input and output section, and is characterized in that the reusable section is divided into a winding A and a winding B through structural innovation; and the winding A and the winding B have obvious reusable characteristics in the design of horizontal patterns and vertical connecting holes. The winding A can be manufactured only by two metal line printing screens and two low-permeability pattern printing screens; the winding B can be manufactured only through two metal line printing screens and two low-magnetic-conductivity pattern printing screens, the winding A and the winding B can be manufactured only through six printing screens in total, the printing screens comprise four metal line printing screens and two low-magnetic-conductivity pattern printing screens, and along with increase of the number of reusable sections, the number of the reusable sections is increased, and the number of the reusable sections is increased. And more printing screens are not needed.

Description

Technical Field

[0001] The invention relates to the technical field of transformer design, and in particular to the internal structure of a novel monolithic sheet-type transformer. Background Art

[0002] Chip transformer is a new type of transformer implementation. It achieves miniaturization of the transformer by co-firing low magnetic permeability layer and metal structure inside high magnetic permeability material.

[0003] At present, this type of transformer usually manufactures the primary and secondary sides on the same layer of high magnetic permeability material, only using the space in the horizontal direction but not the space in the vertical direction. The problem is that the turns ratio of the primary and secondary sides cannot reach a very high turns ratio due to the influence of miniaturization; or the method of connecting the primary side in parallel and the secondary side in series is used to manufacture a chip transformer with only one primary turn inside the transformer to achieve a higher turns ratio, but this will bring about the problems of large leakage inductance of the primary and secondary sides and low coupling efficiency. Summary of the invention

[0004] Based on the problems described in the background technology, this paper proposes a new type of monolithic structure chip transformer. A winding A and a winding B are set respectively. Inside winding A and winding B, the turn ratio of the chip transformer is improved by the method of "primary side parallel connection and secondary side series connection".

[0005] The primary side, secondary side, and connection holes of winding A, and the primary side, secondary side, and connection holes of winding B are designed with a highly reusable structure, which can simplify the manufacturing work and ensure that the current can flow in the same direction in the primary side and in the same direction in the secondary side. By connecting the primary side of winding A and the primary side of winding B in series, and the secondary side of winding A and the secondary side of winding B in series, a reusable segment is formed, and the number of primary turns is increased within a single reusable segment, thereby improving the coupling efficiency between the primary and secondary sides. And as the number of reusable segments in series increases, the coupling efficiency between the primary and secondary sides can be further increased.

[0006] The present invention discloses a high-efficiency parallel primary-side sheet transformer winding structure with a reusable feature, characterized in that it comprises a reusable section (1) and an input and output section (2).

[0007] The reusable section (1) comprises a winding A (11) and a winding B (12) having a reusable feature.

[0008] Winding A (11) is composed of metal patterns on two layers of ferrite ceramic sheets. The number of turns of the primary windings of these adjacent metal patterns is 1, and the patterns are the same; the number of turns of the secondary windings is 8. Under the setting of primary windings in parallel and secondary windings in series, a winding A structure with a primary winding number of 1 and a secondary winding number of 2*8 is formed.

[0009] Winding B (12) is composed of metal patterns on two layers of ferrite ceramic sheets. The number of turns of the primary windings of these adjacent metal patterns is 1, and the patterns are the same; the number of turns of the secondary windings is 8. Under the setting of primary windings in parallel and secondary windings in series, a winding structure B with a primary winding number of 1 and a secondary winding number of 2*8 is formed.

[0010] The primary side of winding A (11) and the primary side of winding B (12) are connected in series; the secondary side of winding A and the secondary side of winding B are connected in series, forming a reusable section with better coupling efficiency between the primary side and the secondary side.

[0011] The winding A (11) includes a lower primary (11a), an inner secondary (11b) and an outer secondary (11c); an upper primary (11d), an inner secondary (11e) and an outer secondary (11f); an outer connecting hole (11g1) of the lower primary, an inner connecting hole (11g2) of the lower primary and an upper primary connecting hole (11h); an inner secondary connecting hole (11i) and an inner secondary connecting hole (11j); an outer secondary connecting hole (11k) and an outer secondary connecting hole (11m); a lower low magnetic permeability pattern (13a or 13c) and an upper low magnetic permeability pattern (13b or 13d).

[0012] The lower primary side (11a) and the upper primary side (11d) are connected in parallel via the lower primary side connection holes (11g1 and 11g2); the lower inner secondary side (11b) and the upper inner secondary side (11e) are connected in series via the lower inner secondary side connection hole (11i); the lower outer secondary side (11c) and the upper outer secondary side (11f) are connected in series via the lower outer secondary side connection hole (11k); The lower layer low magnetic permeability pattern (13a or 13c) covers the lower layer primary side (11a), the lower layer inner side secondary side (11b), and the lower layer outer side secondary side (11c), and reserves connection channels for the lower layer primary side connection holes (11g1 and 11g2), the lower layer inner side secondary side connection holes (11i), and the lower layer outer side secondary side connection holes (11k); the upper layer low magnetic permeability pattern (13b or 13d) covers the upper layer primary side (11d), the upper layer inner side secondary side (11e), and the upper layer outer side secondary side (11f), and reserves connection channels for the upper layer primary side connection holes (11h), the upper layer inner side secondary side connection holes (11j), and the upper layer outer side secondary side connection holes (11m).

[0013] The winding B (12) includes a lower primary (12a), an inner secondary (12b) and an outer secondary (12c); an upper primary (12d), an inner secondary (12e) and an outer secondary (12f); an outer connecting hole (12g1) of the lower primary, an inner connecting hole (12g2) of the lower primary and an upper primary connecting hole (12h); an inner secondary connecting hole (12i) and an inner secondary connecting hole (12j); an outer secondary connecting hole (12k) and an outer secondary connecting hole (12m); a lower low magnetic permeability pattern (13a or 13c) and an upper low magnetic permeability pattern (13b or 13d).

[0014] The lower primary side (12a) and the upper primary side (12d) are connected in parallel via the lower primary side connection holes (12g1 and 12g2); the lower inner secondary side (12b) and the upper inner secondary side (12e) are connected in series via the lower inner secondary side connection holes (12i); and the lower outer secondary side (12c) and the upper outer secondary side (12f) are connected in series via the lower outer secondary side connection holes (12k).

[0015] The lower layer low magnetic permeability pattern (13a or 13c) covers the lower layer primary side (12a), the lower layer inner side secondary side (12b), and the lower layer outer side secondary side (12c), and reserves connection channels for the lower layer primary side connection holes (12g1 and 12g2), the lower layer inner side secondary side connection holes (12i), and the lower layer outer side secondary side connection holes (12k); the upper layer low magnetic permeability pattern (13b or 13d) covers the upper layer primary side (12d), the upper layer inner side secondary side (12e), and the upper layer outer side secondary side (12f), and reserves connection channels for the upper layer primary side connection holes (12h), the upper layer inner side secondary side connection holes (12j), and the upper layer outer side secondary side connection holes (12m).

[0016] The primary side of winding A (11) and the primary side of winding B (12) are connected in series through the upper primary side connection hole (11h); the inner secondary side of winding A (11) and the inner secondary side of winding B (12) are connected in series through the upper inner secondary side connection hole (11j); the outer secondary side of winding A (11) and the outer secondary side of winding B (12) are connected in series through the upper outer secondary side connection hole (11m). In this way, the metal pattern connection inside the reusable segment can be realized.

[0017] The reusable section (1) can be connected to the input-output section (2) through the upper primary connection hole (12h), the upper inner secondary connection hole (12j), and the upper outer secondary connection hole (12m) to achieve the connection between the inner and outer secondary windings, as well as the input and output of the primary winding and the secondary winding, or it can be connected in series with another reusable section to achieve flexible expansion of the reusable section.

[0018] Furthermore, in the chip transformer structure, the lower primary side (11a) and the upper primary side (11d) of the winding A (11) have the same pattern; the lower primary side (12a) and the upper primary side (12d) of the winding B (12) have the same pattern; The lower layer secondary side pattern formed by the lower layer inner secondary side (11b) and the lower layer outer secondary side (11c) of winding A (11) is the same as the lower layer secondary side pattern formed by the lower layer inner secondary side (12b) and the lower layer outer secondary side (12c) of winding B (12).

[0019] The upper secondary side pattern composed of the upper inner secondary side (11e) and the lower outer secondary side (11f) of winding A (11) is the same as the upper secondary side pattern composed of the lower inner secondary side (12e) and the lower outer secondary side (12f) of winding B (12).

[0020] Furthermore, in the chip transformer structure, the primary winding of the reusable section (1) adopts lines of non-uniform width to maintain a sufficient insulation distance with the secondary winding to achieve the high voltage resistance requirement.

[0021] The primary side of winding A (11) and the primary side of winding B (12) both have a "Z"-shaped gap, but the "Z"-shaped gaps of the primary side of winding A (11) and the primary side of winding B (12) are mirror images, and the connection relationship between the primary winding through holes enables the current to flow in the same direction within the reusable segment.

[0022] The secondary side of winding A (11) and the secondary side of winding B (12) need to ensure reusability while also ensuring the connection relationship between the secondary side winding direction and the secondary side through-hole to ensure that the current can flow in the same direction within the reusable section.

[0023] Furthermore, in the chip-type transformer structure, the primary side connection hole, the outer secondary side connection hole, and the inner secondary side connection hole of the reusable section (1) are not distributed in the same vertical plane, but are staggered by a certain distance. Such an arrangement can avoid stress accumulation, improve the transformer's overload resistance, and achieve better overload resistance performance.

[0024] Furthermore, the chip transformer structure is characterized in that, according to different specific product requirements, the transformer can include at least one reusable section (1) and one input and output section (2). When the transformer needs more reusable sections (1), the reusable sections (1) can be directly copied upwards.

[0025] Furthermore, the primary and secondary sides of the reusable segment (1) are printed on high permeability ceramic sheets, and the primary and secondary sides of the reusable segment are covered with low permeability materials. The reusability of the metal pattern allows the low permeability material covering it to be reused as well. This low permeability material can have a window in the center area, as shown in 13c and 13d, so as to improve the coupling efficiency; or the center area of ​​the pattern can be closed, as shown in 13a and 13b, so as to improve the saturation current.

[0026] The chip transformer structure described in the present invention has the advantage of achieving the unity of high turns ratio, high overload resistance, high coupling efficiency and high manufacturing efficiency of the transformer.

[0027] Through structural innovation, the reusable section is divided into winding A and winding B. The internal windings A and B adopt the method of "primary in parallel, secondary in series" to improve the turns ratio; then the coupling efficiency is improved by connecting the primary of winding A in series with the primary of winding B, and the secondary of winding A in series with the secondary of winding B.

[0028] Winding A and Winding B have obvious reusable features in the design of horizontal graphics and vertical connection holes. Winding A only needs 2 metal line printing stencils and 2 low magnetic permeability graphic printing stencils to complete the manufacturing; Winding B only needs 2 metal line printing stencils and 2 low magnetic permeability graphic printing stencils to complete the manufacturing, and Winding A and Winding B need a total of 6 printing stencils to complete the manufacturing, including 4 metal line printing stencils and 2 low magnetic permeability graphic printing stencils, and as the number of reusable segments increases, no more printing stencils are needed.

[0029] The impact resistance is improved by distributing the primary side connection holes, the inner secondary side connection holes, and the outer secondary side connection holes in different vertical planes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is the overall schematic diagram of the reusable segment; Figure 3 It is a schematic diagram of the metal structure of the reusable segment; Figure 4 It is the overall schematic diagram of winding A; Figure 5 It is a schematic diagram of the metal structure of winding A; Figure 6 is the overall schematic diagram of winding B; Figure 7 is a schematic diagram of the metal structure of winding B; Figure 8 It is a graphic style with a closed central area of ​​low magnetic permeability material; Fig. 9 It is a graphic style of opening windows in the central area of ​​low magnetic permeability materials; Fig.10 This is the overall schematic diagram of the input and output section. Fig.11 This is a diagram of the primary and secondary sides of winding A and winding B on a plane. Among them, 1-reusable section, 2-input and output section, 11-winding A, 12-winding B, 13a-lower layer low magnetic permeability pattern with a closed center, 13b-upper layer low magnetic permeability pattern with a closed center, 13c-lower layer low magnetic permeability pattern with a window in the center, 13d-upper layer low magnetic permeability pattern with a window in the center.

[0031] The parts described in this paragraph specifically refer to the components of winding A (11), 11a-lower layer primary, 11b-lower layer inner secondary, 11c-lower layer outer secondary; 11d-upper layer primary, 11e-upper layer inner secondary, 11f-upper layer outer secondary; 11g1-lower layer primary outer connecting hole, 11g2-lower layer primary inner connecting hole, 11h-upper layer primary connecting hole; 11i-lower layer inner secondary connecting hole, 11j-upper layer inner secondary connecting hole; 11k-lower layer outer secondary connecting hole, 11m upper layer outer secondary connecting hole.

[0032] The parts described in this paragraph specifically refer to the components of winding B (12), 12a-lower layer primary, 12b-lower layer inner secondary, 12c-lower layer outer secondary; 12d-upper layer primary, 12e-upper layer inner secondary, 12f-upper layer outer secondary; 12g1-lower layer primary outer connecting hole, 12g2-lower layer primary inner connecting hole, 12h-upper layer primary connecting hole; 12i-lower layer inner secondary connecting hole, 12j-upper layer inner secondary connecting hole; 12k-lower layer outer secondary connecting hole, 12m-upper layer outer secondary connecting hole.

[0033] 21a-vertical connecting hole on the outside of the primary input section, 21b-horizontal connecting line of the primary input section; 21c-vertical connecting hole on the outside of the primary output section, 21d-horizontal connecting line of the primary output section, 21e-vertical connecting hole on the inside of the primary output section; 22a-vertical connecting hole on the outside of the secondary input section, 22b-horizontal connecting line of the secondary input section, 22c-vertical connecting hole on the inside of the secondary input section; 22d-vertical connecting hole on the outside of the secondary output section, 22e-horizontal connecting line of the secondary output section, 22f-vertical connecting hole on the inside of the secondary output section; 23a-inside and outside horizontal connecting line of the secondary side. DETAILED DESCRIPTION

[0034] Below, the technical solution of the present invention is described in detail through specific embodiments. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation disclosed below.

[0035] like Figures 1 to 11 The present invention provides a chip transformer structure with high turns ratio, high overload resistance, high coupling efficiency and high manufacturing efficiency, including a reusable section (1) and an input and output section (2). From the perspective of material matching, it includes a high magnetic permeability material body, a low magnetic permeability material integrated inside the high magnetic permeability material body, and a metal material.

[0036] First, the primary side working mode is described. The current enters the primary side of the reusable section (1) of the transformer winding B (12) from the vertical connection hole (21a) on the outside of the primary side input section and the horizontal connection line (21b) on the primary side input section. The specific path is to enter the upper primary side connection hole (12h). Due to the parallel relationship of the lower primary side outer connection hole (12g1), the current flows counterclockwise in the upper primary side (12d) and the lower primary side (12a) at the same time, and then flows out from the lower primary side inner connection hole (12g2) to the upper primary side connection hole (12h) of the winding A (11). 11h), due to the parallel relationship of the inner connecting hole (11g2) of the lower primary side, the current continues to flow counterclockwise in the upper primary side (11d) and the lower primary side (11a) at the same time, and then flows out of the reusable section (1) from the outer connecting hole (11g1) of the lower primary side. The subsequent current can be output through the path of the inner vertical connecting hole (21e) of the primary output section, the horizontal connecting line (21d) of the primary output section, and the outer vertical connecting hole (21c) of the primary output section, or after repeating the primary current path in the reusable section, it can be output from the transformer.

[0037] The working method of the secondary side is then described. The current enters the secondary side of the winding A (11) of the reusable section (1) of the transformer through the outer vertical connection hole (22a) of the secondary side input section, the horizontal connection line (22b) of the secondary side input section, and the inner vertical connection hole (22c) of the secondary side input section. The current first enters the secondary side from the inner end point of the lower outer secondary side (11c), flows clockwise to the outer end point, and then enters the upper outer secondary side (11f) through the lower outer secondary side connection hole (11k). After the current flows clockwise from the outer end point to the inner end point, it enters the upper outer secondary side connection hole (11m).

[0038] After the secondary current flows out of the upper outer secondary connection hole (11m), it enters the inner end point of the lower outer secondary (12c) of the winding B (12), and then flows clockwise in the lower outer secondary (12c) to the outer end point, and then enters the upper outer secondary (12f) through the lower outer secondary connection hole (12k). After flowing clockwise from the outer end point to the inner end point in the upper outer secondary (12f), it enters the upper outer secondary connection hole (12m). If there are other reusable segments above this reusable segment (1), the current will repeat this process. If there are no more reusable segments (1), the current will enter the upper outer secondary side connection hole (12m) and then flow from the outer secondary side to the inner secondary side through the inner outer secondary side horizontal connection line (23a), pass through the upper inner secondary side connection hole (12j), and enter the upper inner secondary side (12e) of winding B (12).

[0039] The current flows clockwise from the outer end point to the inner end point in the upper inner secondary side (12e), enters the lower inner secondary side (12b) through the lower inner secondary side connection hole (12i), and then flows in the lower inner secondary side (12b) in a clockwise direction from the inner end point to the outer end point.

[0040] After the current flows to the outer end point of the lower inner secondary side (12b), it enters the upper inner secondary side (11e) of the winding A (11) through the upper inner secondary side connection hole (11j). After the current flows clockwise from the outer end point to the inner end point in the upper inner secondary side (11e), it enters the lower inner secondary side (11b) through the lower inner secondary side connection hole (11i), and then flows in the lower inner secondary side (11b) in a clockwise direction from the inner end point to the outer end point.

[0041] If there are other reusable segments below the reusable segment (1), the current will repeat this process. If there are no more reusable segments (1), the current will flow out of the secondary side of the transformer through the vertical connection hole (22f) inside the secondary output segment, the horizontal connection line (22e) of the secondary output segment, and the vertical connection hole (22d) outside the secondary output segment.

[0042] Due to the special design of the winding structure, the current maintains the same current direction in the secondary sides of winding A (11) and winding B (12).

[0043] pass Fig.10It can also be seen that the primary input segment horizontal connecting line (21b), the primary output segment horizontal connecting line (21d), the secondary input segment horizontal connecting line (22b), the secondary output segment horizontal connecting line (22e), and the inner and outer secondary horizontal connecting lines (23a) are all covered with low magnetic permeability materials, and based on the characteristics of the distribution of the vertical connection holes in their vicinity, the low magnetic permeability material patterns used on winding A (11) and winding B (12) can be directly reused.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The present invention discloses a high-efficiency parallel primary-side sheet transformer winding structure with a reusable feature, characterized in that: It includes a reusable section (1) and an input and output section (2); The reusable section (1) includes a winding A (11) and a winding B (12) having a reusable feature; Winding A (11) is composed of metal patterns on two layers of ferrite ceramic sheets. The number of turns of the primary windings of these adjacent metal patterns is 1, and the patterns are the same; the number of turns of the secondary windings is 8. Under the setting of primary windings in parallel and secondary windings in series, a winding A structure with a primary winding number of 1 and a secondary winding number of 2 x 8 is formed; Winding B (12) is composed of metal patterns on two layers of ferrite ceramic sheets. The number of turns of the primary windings of these adjacent metal patterns is 1, and the patterns are the same; the number of turns of the secondary windings is 8. Under the setting of primary windings in parallel and secondary windings in series, a winding structure B with a primary winding number of 1 and a secondary winding number of 2 x 8 is formed; The primary side of winding A (11) and the primary side of winding B (12) are connected in series; the secondary side of winding A and the secondary side of winding B are connected in series, forming a reusable section with better coupling efficiency between the primary side and the secondary side; The winding A (11) includes a lower primary (11a), an inner secondary (11b) and an outer secondary (11c); an upper primary (11d), an inner secondary (11e) and an outer secondary (11f); an outer connecting hole (11g1) of the lower primary, an inner connecting hole (11g2) of the lower primary and an upper primary connecting hole (11h); an inner secondary connecting hole (11i) and an inner secondary connecting hole (11j); an outer secondary connecting hole (11k) and an outer secondary connecting hole (11m); a lower low magnetic permeability pattern (13a or 13c) and an upper low magnetic permeability pattern (13b or 13d); The lower primary side (11a) and the upper primary side (11d) are connected in parallel via the lower primary side connection holes (11g1 and 11g2); the lower inner secondary side (11b) and the upper inner secondary side (11e) are connected in series via the lower inner secondary side connection hole (11i); the lower outer secondary side (11c) and the upper outer secondary side (11f) are connected in series via the lower outer secondary side connection hole (11k); The lower layer low magnetic permeability pattern (13a or 13c) covers the lower layer primary side (11a), the lower layer inner side secondary side (11b), and the lower layer outer side secondary side (11c), and reserves connection channels for the lower layer primary side connection holes (11g1 and 11g2), the lower layer inner side secondary side connection holes (11i), and the lower layer outer side secondary side connection holes (11k); the upper layer low magnetic permeability pattern (13b or 13d) covers the upper layer primary side (11d), the upper layer inner side secondary side (11e), and the upper layer outer side secondary side (11f), and reserves connection channels for the upper layer primary side connection holes (11h), the upper layer inner side secondary side connection holes (11j), and the upper layer outer side secondary side connection holes (11m); The winding B (12) includes a lower primary (12a), an inner secondary (12b) and an outer secondary (12c); an upper primary (12d), an inner secondary (12e) and an outer secondary (12f); an outer connecting hole (12g1) of the lower primary, an inner connecting hole (12g2) of the lower primary and an upper primary connecting hole (12h); an inner secondary connecting hole (12i) of the lower secondary and an inner secondary connecting hole (12j) of the upper secondary; an outer secondary connecting hole (12k) of the lower secondary and an outer secondary connecting hole (12m) of the upper secondary; a lower low magnetic permeability pattern (13a or 13c) and an upper low magnetic permeability pattern (13b or 13d); The lower primary side (12a) and the upper primary side (12d) are connected in parallel via the lower primary side connection holes (12g1 and 12g2); the lower inner secondary side (12b) and the upper inner secondary side (12e) are connected in series via the lower inner secondary side connection hole (12i); and the lower outer secondary side (12c) and the upper outer secondary side (12f) are connected in series via the lower outer secondary side connection hole (12k); The lower layer low magnetic permeability pattern (13a or 13c) covers the lower layer primary side (12a), the lower layer inner side secondary side (12b), and the lower layer outer side secondary side (12c), and reserves connection channels for the lower layer primary side connection holes (12g1 and 12g2), the lower layer inner side secondary side connection holes (12i), and the lower layer outer side secondary side connection holes (12k); the upper layer low magnetic permeability pattern (13b or 13d) covers the upper layer primary side (12d), the upper layer inner side secondary side (12e), and the upper layer outer side secondary side (12f), and reserves connection channels for the upper layer primary side connection holes (12h), the upper layer inner side secondary side connection holes (12j), and the upper layer outer side secondary side connection holes (12m); The primary side of winding A (11) and the primary side of winding B (12) are connected in series through the upper primary side connection hole (11h); the inner secondary side of winding A (11) and the inner secondary side of winding B (12) are connected in series through the upper inner secondary side connection hole (11j); the outer secondary side of winding A (11) and the outer secondary side of winding B (12) are connected in series through the upper outer secondary side connection hole (11m). In this way, the metal pattern connection inside the reusable segment can be realized; The reusable section (1) can be connected to the input-output section (2) through the upper primary connection hole (12h), the upper inner secondary connection hole (12j), and the upper outer secondary connection hole (12m) to achieve the connection between the inner and outer secondary windings, as well as the input and output of the primary winding and the secondary winding, or it can be connected in series with another reusable section to achieve flexible expansion of the reusable section.

2. The chip transformer structure according to claim 1, characterized in that: The lower primary side (11a) and the upper primary side (11d) of the winding A (11) have the same graphics; the lower primary side (12a) and the upper primary side (12d) of the winding B (12) have the same graphics; The lower layer secondary side pattern formed by the lower layer inner secondary side (11b) and the lower layer outer secondary side (11c) of the winding A (11) is the same as the lower layer secondary side pattern formed by the lower layer inner secondary side (12b) and the lower layer outer secondary side (12c) of the winding B (12); The upper secondary side pattern composed of the upper inner secondary side (11e) and the lower outer secondary side (11f) of winding A (11) is the same as the upper secondary side pattern composed of the lower inner secondary side (12e) and the lower outer secondary side (12f) of winding B (12).

3. The chip transformer structure according to claim 1, characterized in that: The primary winding of the reusable section (1) uses lines of non-uniform width to maintain a sufficient insulation distance from the secondary winding to achieve high voltage resistance requirements; The primary side of winding A (11) and the primary side of winding B (12) both have a "Z"-shaped gap, but the "Z"-shaped gaps of the primary side of winding A (11) and the primary side of winding B (12) are mirror images, and the connection relationship of the primary winding through-holes is combined to achieve the same direction flow of current in the reusable section; The secondary side of winding A (11) and the secondary side of winding B (12) need to ensure reusability while also ensuring the connection relationship between the secondary side winding direction and the secondary side through-hole to ensure that the current can flow in the same direction within the reusable section.

4. The chip transformer structure according to claim 1, characterized in that: The primary side connection hole, the outer secondary side connection hole, and the inner secondary side connection hole of the reusable section (1) are not distributed in the same vertical plane, but are staggered at a certain distance. Such an arrangement can avoid stress accumulation, improve the overload resistance of the transformer, and achieve better overload resistance performance.

5. The chip transformer structure according to claim 1, characterized in that: According to different specific product requirements, the transformer may include at least one reusable section (1) and one input and output section (2). When the transformer requires more reusable sections (1), the reusable sections (1) can be directly copied upwards.

6. The chip transformer structure according to claim 1, characterized in that: The primary winding and the secondary winding of the reusable section (1) are both printed on a high permeability ceramic sheet, and the primary winding and the secondary winding of the reusable section are both covered with a low permeability material. The reusability of the metal pattern allows the low permeability material covering it to be reused as well. This low permeability material can have a window in the center area, as shown in 13c and 13d, which can improve the coupling efficiency; or the center area of ​​the pattern can be closed, as shown in 13a and 13b, which can improve the saturation current.

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