A transformer structure

Abstract

This application provides a transformer structure, including a square ring magnetic core and windings. The windings include a first primary winding, a second primary winding, and a secondary winding. The first primary winding is wound on a first region of the square ring magnetic core, and the second primary winding is wound on a second region of the square ring magnetic core. The first and second regions are arranged circumferentially along the square ring magnetic core, and the first and second primary windings are spaced apart. The secondary winding is wound on at least a portion of the first and second primary windings away from the outer side of the square ring magnetic core, thereby improving heat dissipation performance.

Description

Technical Field

[0001] This application relates to the field of transformer technology, specifically to a transformer structure. Background Technology

[0002] Currently available transformer devices typically include a magnetic core, a primary winding, and a secondary winding. The secondary winding is usually located in the central column of the magnetic core and is shielded by the sidewalls of the magnetic core and the primary winding. Due to the high current, the secondary winding of the device is prone to severe heat generation, and the existing device structure is not conducive to heat dissipation. This leads to low device efficiency and certain safety hazards. Summary of the Invention

[0003] In view of this, this application provides a transformer structure to improve heat dissipation performance.

[0004] This application provides a transformer structure including a square ring magnetic core and windings. The windings include a first primary winding, a second primary winding, and a secondary winding. The first primary winding is wound on a first region of the square ring magnetic core, and the second primary winding is wound on a second region of the square ring magnetic core. The first region and the second region are arranged circumferentially along the square ring magnetic core, and the first primary winding and the second primary winding are spaced apart. The secondary winding is wound on at least a portion of the first primary winding and the second primary winding away from the outer side of the square ring magnetic core.

[0005] In some embodiments, the first region and the second region are symmetrically arranged on the square ring magnetic core.

[0006] In some embodiments, the secondary winding includes a first winding portion, a second winding portion, and a third winding portion connected in sequence. The second winding portion is located inside the square ring core and between the first primary winding and the second primary winding. The first winding portion and the third winding portion are located outside the square ring core and are respectively located outside a portion of the first primary winding and the second primary winding.

[0007] In some embodiments, the square ring magnetic core has a top surface, a bottom surface, a first outer surface, a second outer surface, a first inner surface, and a second inner surface. The top surface and the bottom surface are disposed opposite each other. The first inner surface and the second inner surface are disposed opposite each other and are both connected to the bottom surface and the top surface. The first outer surface and the second outer surface are both connected to the top surface and the bottom surface. The first outer surface is located on the side of the square ring magnetic core away from the first inner surface, and the second outer surface is located on the side of the square ring magnetic core away from the second inner surface. The first primary winding is wound on the square ring magnetic core located on the first outer surface and the first inner surface, and the second primary winding is wound on the square ring magnetic core located on the second outer surface and the second inner surface.

[0008] In some embodiments, the first winding portion includes a first winding portion and a second winding portion connected to the first winding portion, wherein the side of the first winding portion opposite to the second winding portion is connected to the second winding portion; the third winding portion includes a third winding portion and a fourth winding portion connected to the third winding portion, wherein the side of the third winding portion opposite to the fourth winding portion is connected to the second winding portion.

[0009] The first winding portion is located on the side of the first primary winding away from the top surface, and the second winding portion is located on the side of the first primary winding away from the second primary winding.

[0010] The third winding portion is located on the side of the second primary winding away from the bottom surface, and the fourth winding portion is located on the side of the second primary winding away from the first primary winding.

[0011] In some embodiments, the first winding portion includes a first winding portion and a second winding portion connected to the first winding portion, wherein the side of the first winding portion opposite to the second winding portion is connected to the second winding portion; the third winding portion includes a third winding portion and a fourth winding portion connected to the third winding portion, wherein the side of the third winding portion opposite to the fourth winding portion is connected to the second winding portion.

[0012] The first winding portion is located on the side of the first primary winding away from the top surface, and the second winding portion is located on the side of the first primary winding away from the second primary winding.

[0013] The third winding portion is located on the side of the second primary winding away from the top surface, and the fourth winding portion is located on the side of the second primary winding away from the first primary winding.

[0014] In some embodiments, the second winding portion is perpendicularly connected to the first winding portion, the first winding portion is perpendicularly connected to the second winding portion, the second winding portion is perpendicularly connected to the third winding portion, and the third winding portion is perpendicularly connected to the fourth winding portion.

[0015] In some embodiments, the second winding portion includes a first sub-portion and a second sub-portion, one end of the first sub-portion is connected to one end of the second sub-portion to form a connection, the portions of the first sub-portion and the second sub-portion facing away from the connection are spaced apart to form a gap, the side of the first sub-portion facing away from the connection is connected to the side of the first winding portion facing away from the second winding portion, and the side of the second sub-portion facing away from the connection is connected to the side of the third winding portion facing away from the fourth winding portion.

[0016] In some embodiments, an insulating sheet is disposed within the gap.

[0017] In some embodiments, the first sub-part and the second sub-part are connected by a terminal.

[0018] This application provides a transformer structure, including a square ring magnetic core and windings. The windings include a first primary winding, a second primary winding, and a secondary winding. The first primary winding is wound on a first region of the square ring magnetic core, and the second primary winding is wound on a second region of the square ring magnetic core. The first and second regions are arranged circumferentially along the square ring magnetic core, and the first and second primary windings are spaced apart. The secondary winding is wound on at least a portion of the first and second primary windings away from the outer side of the square ring magnetic core, thereby improving heat dissipation performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the first three-dimensional structure of the transformer provided in this application;

[0021] Figure 2 yes Figure 1 A three-dimensional structural diagram of the secondary winding in the circuit;

[0022] Figure 3 This is a three-dimensional structural schematic diagram of the square ring magnetic core provided in this application;

[0023] Figure 4 This is a schematic diagram of the second three-dimensional structure of the transformer provided in this application;

[0024] Figure 5 yes Figure 4 A three-dimensional structural diagram of the secondary winding and insulating sheet.

[0025] Figure label:

[0026] 10. Transformer; 100. Square ring magnetic core; 101. Top surface; 102. Bottom surface; 103. First outer surface; 104. First inner surface; 110. First winding post; 120. Second winding post; 200. First primary winding; 300. Second primary winding; 400. Secondary winding; 410. First winding section; 420. Second winding section; 430. Third winding section; 440. Fourth winding section; 441. First plate; 442. Second plate; 443. Third plate; 450. Second winding section; 451. First sub-section; 452. Second sub-section; 500. Terminal; 600. Gap; 700. Insulating sheet. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "connection," "electrical connection," and "electrical link" as used herein include any direct and indirect electrical or structural connection means. Therefore, if a first device is described herein as coupled / connected / electrically connected to a second device, it means that the first device can be directly electrically / structurally connected to the second device, or indirectly electrically / structurally connected to the second device through other means or connection methods.

[0030] This application provides a transformer structure, including a square ring magnetic core and windings. The windings include a first primary winding, a second primary winding, and a secondary winding. The first primary winding is wound on a first region of the square ring magnetic core, and the second primary winding is wound on a second region of the square ring magnetic core. The first and second regions are arranged circumferentially along the square ring magnetic core, and the first primary winding and the second primary winding are spaced apart. The secondary winding is wound on at least a portion of the first primary winding and the second primary winding away from the outer side of the square ring magnetic core.

[0031] In existing technologies, secondary windings typically need to withstand high currents, resulting in significant heat generation during operation. However, conventional secondary windings are usually wound on a magnetic core and are shielded by the primary winding and magnetic core, limiting their heat dissipation area and creating poor heat dissipation channels. This makes it difficult to dissipate the heat generated by the secondary winding in a timely manner, leading to increased device temperature. This heat generation problem is particularly prominent during the conversion from high voltage / low current to low voltage / high current. In this application, by configuring the secondary winding to be wound on the outer side of at least a portion of the first and second primary windings away from the square ring magnetic core, the shielding of the secondary winding by the primary winding and square ring magnetic core is avoided. This increases the contact area between the secondary winding and the air, and ensures smooth heat dissipation channels. This allows the heat generated by the secondary winding due to the high current to dissipate quickly, preventing heat buildup inside the device and thus avoiding the risk of overheating. This, in turn, prevents reduced transformer efficiency and safety hazards.

[0032] Please see Figures 1-3 , Figure 1 This is a schematic diagram of the first three-dimensional structure of the transformer provided in this application; Figure 2 yes Figure 1 A three-dimensional structural diagram of the secondary winding in the circuit; Figure 3This is a three-dimensional structural schematic diagram of the square ring magnetic core provided in this application. This application provides a transformer 10 structure, including a square ring magnetic core 100 and windings. The windings include a first primary winding 200, a second primary winding 300, and a secondary winding 400. The first primary winding is wound on a first region of the square ring magnetic core 100, and the second primary winding 300 is wound on a second region of the square ring magnetic core 100. The first and second regions are arranged circumferentially along the square ring magnetic core 100, and the first primary winding 200 and the second primary winding 300 are spaced apart. The secondary winding 400 is wound on at least a portion of the first primary winding 200 and the second primary winding 300 away from the outer side of the square ring magnetic core 100. Specifically, the transformer 10 includes a square ring magnetic core 100 and windings. The square ring magnetic core 100 has a ring-shaped planar structure, which is not limited here. The square ring magnetic core 100 has a first region and a second region arranged along the circumferential direction, and the first region is connected to the second region. The windings include a first primary winding 200, a second primary winding 300, and a secondary winding 400. Both the first primary winding 200 and the second primary winding 300 are formed by wires wound around the square ring magnetic core 100. The wires can be Mylar wire or insulated wire, etc. The primary winding 300 and the secondary winding 400 are respectively wound on a first region of the square ring magnetic core 100 and a second primary winding 300 on a second region of the square ring magnetic core 100. The first region and the second region are arranged along the circumferential direction of the square ring magnetic core 100, and the first primary winding 200 and the second primary winding 300 are arranged at intervals, that is, the first primary winding 200 and the second primary winding 300 are separately arranged in two different regions on the square ring magnetic core 100. The secondary winding 400 is wound on at least part of the first primary winding 200 and the second primary winding 300 away from the outer side of the square ring magnetic core 100.

[0033] In existing technologies, the secondary winding 400 typically needs to withstand high currents, resulting in significant heat generation during operation. However, existing secondary windings 400 are usually wound on the magnetic core, shielded by the primary winding and the core sidewalls, limiting their heat dissipation area and creating poor heat dissipation channels. This makes it difficult for the heat generated by the secondary winding 400 to dissipate in a timely manner, leading to increased device temperature. This heat generation problem is particularly pronounced during high-voltage, low-current to low-voltage, high-current transitions. In this application, by configuring the secondary winding 400 to be wound on the core... A small portion of the first primary winding 200 and the second primary winding 300 are positioned away from the outer side of the square ring core 100. This prevents the primary winding and the square ring core 100 from obstructing the secondary winding 400, increases the contact area between the secondary winding 400 and the air, and ensures unobstructed heat dissipation. This allows the secondary winding 400, which carries a higher current, to dissipate heat quickly, preventing it from accumulating inside the device and thus avoiding the risk of overheating. This also helps prevent a decrease in the efficiency of the transformer 10 and reduces safety hazards, making it particularly suitable for the structure of a DC-DC transformer 10.

[0034] In this application, by separately setting the first primary winding 200 and the second primary winding 300 in two different regions on the square ring core 100, the magnetic field generated by the primary winding is more uniformly distributed inside the square ring core 100. The uniform magnetic field distribution can help reduce leakage flux, that is, reduce the magnetic lines of force that leak to the outside without passing through the secondary winding 400. Moreover, the uniformity of the magnetic field distribution can enable the secondary winding 400 to more effectively sense the changes in magnetic flux generated by the primary winding, which helps to increase the induced electromotive force in the secondary winding 400, thereby improving the electromagnetic coupling efficiency of the transformer 10. Separating the first primary winding 200 and the second primary winding 300 in two different regions on the square ring core 100 can also make the temperature distribution of the primary winding on the square ring core 100 more uniform, prevent the occurrence of local overheating, and improve the thermal stability and reliability of the transformer 10.

[0035] In this application, by setting the secondary winding 400 to cover the first primary winding 200 and the second primary winding 300 away from the outside of the square ring magnetic core 100, space can be effectively utilized and better magnetic shielding can be achieved. This effectively blocks the influence of external magnetic fields on the windings and reduces the interference of the magnetic field generated by the windings themselves on the external environment. This reduces the magnetic saturation effect and prevents the transformer 10 from experiencing performance degradation or damage under high voltage or high current, thereby improving the performance and stability of the transformer 10.

[0036] In this application, by setting the secondary winding 400 to cover the first primary winding 200 and the second primary winding 300 away from the outside of the square ring core 100, this method simplifies the connection and fixing of the square ring core 100, the primary winding and the secondary winding 400, while ensuring safety and reducing the spatial size of the device. Moreover, setting the secondary winding 400 outside the primary winding can simplify the assembly process of the secondary winding 400, reduce costs and adapt to various fields.

[0037] In this application, the number of turns of the external secondary winding 400 can be adjusted according to requirements and can be adapted to various transformer 10 structural designs. That is, by adjusting the number of turns of the secondary winding 400, the transformation ratio of the transformer 10 can be changed, thereby adjusting the output voltage and current to reduce losses and improve the efficiency of the transformer 10.

[0038] In one embodiment, the first region and the second region are symmetrically arranged on the square ring core 100, that is, the first primary winding 200 and the second primary winding 300 are symmetrically arranged about the square ring core 100. This further makes the magnetic field generated by the primary winding more uniformly distributed inside the square ring core 100 and on the square ring core 100. The uniform magnetic field distribution on the square ring core 100 can further reduce the magnetic lines of force that leak to the outside without passing through the secondary winding 400 and further enable the secondary winding 400 to more effectively sense the magnetic flux change generated by the primary winding, which helps to increase the induced electromotive force in the secondary winding 400, thereby improving the electromagnetic coupling efficiency of the transformer 10. The more uniform temperature distribution on the square ring core 100 can further prevent the occurrence of local overheating and further improve the thermal stability and reliability of the transformer 10. In addition, the symmetrical arrangement of the square ring core 100 can simplify the design of the square ring core 100 and reduce the design difficulty and production cost.

[0039] In one embodiment, the planar shape of the square ring magnetic core 100 can be a square, U-shaped, triangular, or hexagonal ring core, or a UU / UI / UF / UY / FT type paired core, which is not limited here. The square ring magnetic core 100 can be a one-piece molded structure to improve mechanical strength and withstand greater external forces and vibrations, thereby improving the durability and reliability of the transformer 10. At the same time, the one-piece molded structure of the square ring magnetic core 100 can also reduce the leakage flux of the inductor and improve the magnetic shielding effect. The square ring magnetic core 100 can also be a spliced ​​structure, and the splice can be fixed by adhesive, that is, the splice is connected by adhesive, so that if a part of the square ring magnetic core 100 fails or is damaged, the spliced ​​structure can replace the damaged part separately without replacing the entire square ring magnetic core 100. This helps to reduce maintenance costs and time and facilitates the winding of the winding.

[0040] In this embodiment, the square-ring magnetic core 100 is taken as an example of a splicing structure and a ring structure in the shape of a Chinese character 'hui' for illustration. The square-ring magnetic core 100 includes magnetic columns and magnets. The magnet includes a first winding column 110, a second winding column 120, and a connecting column. The first winding column 110 and the second winding column 120 are respectively connected to opposite ends of the connecting column, and the first winding column 110 and the second winding column 120 are arranged oppositely. The first winding column 110, the second winding column 120, and the connecting column are connected to form a structure similar to a '凵' shape. The ends of the first winding column 110 and the second winding column 120 facing away from the connecting column are respectively connected to opposite sides of the magnetic column to form a closed magnetic circuit. The magnetic column and the magnet are connected to form a structure similar to a Chinese character 'hui'. A first primary winding 200 is wound around the first winding column 110, and a second primary winding 300 is wound around the second winding column 120.

[0041] In one embodiment, the secondary winding 400 includes a first winding portion, a second winding portion 450, and a third winding portion connected in sequence. The second winding portion 450 is located inside the square ring core 100 and between the first primary winding 200 and the second primary winding 300. The first winding portion and the third winding portion are located outside the square ring core 100 and are respectively located outside a portion of the first primary winding 200 and the second primary winding 300. Specifically, the material forming the secondary winding 400 can be a metal such as copper or aluminum, without limitation. Metal materials have good thermal conductivity, which helps dissipate heat and thus reduces the temperature rise of the transformer 10. The secondary winding 400 can be formed by die casting, allowing it to withstand greater mechanical and thermal stresses. Due to the precision of the mold, the secondary winding 400 manufactured by die casting has high precision and consistency, ensuring the stable performance of the transformer 10. The secondary winding 400 includes a first winding section, a second winding section 450, and a third winding section connected in sequence. The second winding section 450 is located inside the square ring core 100 and between the first primary winding 200 and the second primary winding 300. The first and third winding sections are located outside the square ring core 100 and respectively outside portions of the first primary winding 200 and the second primary winding 300. The secondary winding 400 extends from the outside of the square ring core 100 to the inside of the square ring core 100, and then extends from the inside of the square ring core 100 to the outside. This arrangement of the secondary winding 400 makes full use of the space, further avoids the primary winding and the square ring core 100 from obstructing the secondary winding 400, further increases the contact area between the secondary winding 400 and the air, and ensures unobstructed heat dissipation. This allows the secondary winding 400, which bears a higher current, to dissipate more heat more quickly, avoiding accumulation inside the device and thus preventing the risk of overheating. This also prevents a decrease in the efficiency of the transformer 10 and reduces safety hazards. Furthermore, the secondary winding 400 is wound on the outside of the primary winding, which further enhances the magnetic shielding effect, further reduces the magnetic saturation effect, and further improves the performance and stability of the transformer 10.

[0042] In one embodiment, the square ring magnetic core 100 has a top surface 101, a bottom surface 102, a first outer surface 103, a second outer surface, a first inner surface 104, and a second inner surface. The top surface 101 and the bottom surface 102 are disposed opposite each other. The first inner surface 104 and the second inner surface are disposed opposite each other and are both connected to the bottom surface 102 and the top surface 101. The first outer surface 103 and the second outer surface are both connected to the top surface 101 and the bottom surface 102. The first outer surface 103 is located on the side of the square ring magnetic core 100 away from the first inner surface 104, and the second outer surface is located on the side of the square ring magnetic core 100 away from the second inner surface. The first primary winding 200 is wound on the square ring magnetic core 100 located on the first outer surface 103 and the first inner surface 104, and the second primary winding 300 is wound on the square ring magnetic core 100 located on the second outer surface and the second inner surface.Specifically, the square ring magnetic core 100 has a top surface 101, a bottom surface 102, a first outer surface 103, a second outer surface 102, a third outer surface 103, a fourth outer surface 104, a first inner surface 104, a second inner surface 102, a third inner surface 103, and a fourth inner surface 104. The top surface 101 and the bottom surface 102 are opposite each other. The first inner surface 104 and the second inner surface 104 face each other and are both connected to the bottom surface 102 and the top surface 101. The third inner surface and the fourth inner surface 104 face each other and are both connected to the bottom surface 102 and the top surface 101. The first inner surface 104, the third inner surface 102, the second inner surface 103, and the fourth inner surface 104 are connected sequentially. The first outer surface 103... The first outer surface 103, the second outer surface 104, and the fourth outer surface 105 are respectively connected to the top surface 101 and the bottom surface 102. The first outer surface 103, the third outer surface 104, the second outer surface 105, and the fourth outer surface 106 are connected sequentially. The first outer surface 103 is located on the side of the square ring magnetic core 100 opposite to the first inner surface 104, the second outer surface 105 is located on the side of the square ring magnetic core 100 opposite to the second inner surface, the third outer surface 105 is located on the side of the square ring magnetic core 100 opposite to the third inner surface, and the fourth outer surface 106 is located on the side of the square ring magnetic core 100 opposite to the fourth inner surface. Taking the square ring magnetic core 100 as an example of a U-shaped ring magnetic core, the first inner surface 104 and the first outer surface 103 are located on the first winding post 110, the second outer surface and the second outer surface are located on the second winding post 120, and the fourth inner surface and the fourth outer surface are located on the magnetic post. The first primary winding 200 is wound on the first winding post 110, and the second primary winding 300 is wound on the second winding post 120. That is, the first primary winding 200 is wound on the square ring magnetic core 100 located on the first outer surface 103 and the first inner surface 104, and the second primary winding 300 is wound on the square ring magnetic core 100 located on the second outer surface and the second inner surface. The toroidal core 100 further avoids obstruction of the secondary winding 400 by the primary winding and the square toroidal core 100, further increasing the contact area between the secondary winding 400 and the air, and ensuring unobstructed heat dissipation. This allows the secondary winding 400, which bears a higher current, to dissipate more heat more quickly, preventing heat buildup inside the device and thus avoiding the risk of overheating. This also prevents a decrease in the efficiency of the transformer 10 and reduces safety hazards. At the same time, it further enhances the magnetic shielding effect, further reduces the magnetic saturation effect, and further improves the performance and stability of the transformer 10.

[0043] In one embodiment, the first winding section includes a first winding section 410 and a second winding section 420 connected to the first winding section 410, with the side of the first winding section 410 facing away from the second winding section 420 connected to the second winding section 450; the third winding section includes a third winding section 430 and a fourth winding section 440 connected to the third winding section 430, with the side of the third winding section 430 facing away from the fourth winding section 440 connected to the second winding section 450; the first winding section 410 is located on the first primary winding 200 facing away from the top. On one side of surface 101, the second winding portion 420 is located on the side of the first primary winding 200 away from the second primary winding 300; the third winding portion 430 is located on the side of the second primary winding 300 away from the bottom surface 102; and the fourth winding portion 440 is located on the side of the second primary winding 300 away from the first primary winding 200. That is, the secondary winding 400 extends from the outside of the first primary winding 200 away from the first outer surface 103 to the outside of the first primary winding 200 away from the top surface 101, and then extends towards the square ring core 1. The first primary winding 200 and the second primary winding 300 extend to the outer side of the second primary winding 300 away from the bottom surface 102, and then extend to the outer side of the second primary winding 300 away from the second outer side. That is, the first winding section, the second winding section 450 and the third winding section are connected to form a secondary winding 400 in an "S" shape, so that the secondary winding 400 partially covers the first primary winding 200 and the second primary winding 300, in order to further prevent the primary winding and the square ring magnetic core 100 from affecting the secondary winding. The shielding of the secondary winding 400 further increases the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed. This allows the secondary winding 400, which bears a higher current, to generate more heat, which can be dissipated more quickly, avoiding accumulation inside the device. This prevents the device from overheating, thus avoiding a decrease in the efficiency of the transformer 10 and reducing safety hazards. At the same time, it can further improve the magnetic shielding effect, further reduce the magnetic saturation effect, and further improve the performance and stability of the transformer 10.

[0044] In one embodiment, the second winding portion 420 is perpendicularly connected to the first winding portion 410, the first winding portion 410 is perpendicularly connected to the second winding portion 450, the second winding portion 450 is perpendicularly connected to the third winding portion 430, and the third winding portion 430 is perpendicularly connected to the fourth winding portion 440. This further increases the contact area between the secondary winding 400 and the air, and ensures unobstructed heat dissipation, thereby improving the heat dissipation performance of the device. At the same time, it can further enhance the magnetic shielding effect, further reduce the magnetic saturation effect, and further improve the performance and stability of the transformer 10.

[0045] In one embodiment, the first winding portion 410 and the third winding portion 430 have the same length, width and height, and the second winding portion 420, the second winding portion 450 and the fourth winding portion 440 have the same length, width and height. This increases the contact area between the secondary winding 400 and the air, improves the heat dissipation performance of the device, reduces the design difficulty of the secondary winding 400, and improves production efficiency.

[0046] In one embodiment, the fourth winding portion 440 includes a first plate 441, a second plate 442, and a third plate 443 connected in sequence. The end of the first plate 441 facing away from the second plate 442 is connected to the end of the third winding portion 430 facing away from the second winding portion 450. The first plate 441 and the second plate 442, as well as the second plate 442 and the third plate 443, are vertically connected. There is a gap between the first plate 441 and the third plate 443 so that they are arranged opposite each other, thereby further increasing the contact area between the secondary winding 400 and the air, improving the heat dissipation performance of the device, and at the same time, further improving the magnetic shielding effect, further reducing the magnetic saturation effect, and further improving the performance and stability of the transformer 10.

[0047] In one embodiment, the first plate 441 and the third plate 443 have the same length, width and height, so as to increase the contact area between the secondary winding 400 and the air, improve the heat dissipation performance of the device, reduce the design difficulty of the secondary winding 400 and improve production efficiency.

[0048] In one embodiment, the transformer 10 structure further includes a base and a terminal 500. The terminal 500 and the secondary winding 400 are fixed on the base. The ends of the first primary winding 200 and the second primary winding 300 are connected to the terminal 500. The end of the secondary winding 400 is also connected to the terminal 500. The bottom surface 102 of the square ring magnetic core 100 is close to the side of the base.

[0049] See Figure 4 and Figure 5 Please continue reading Figure 3 , Figure 4 This is a schematic diagram of the second three-dimensional structure of the transformer provided in this application; Figure 5 yes Figure 4Schematic diagram of the three-dimensional structure of the secondary winding and the insulating sheet in []. It should be noted that the difference between the second structure and the first structure is as follows: The first winding part includes a first winding section 410 and a second winding section 420 connected to the first winding section 410. The side of the first winding section 410 facing away from the second winding section 420 is connected to the second winding part 450; the third winding part includes a third winding section 430 and a fourth winding section 440 connected to the third winding section 430. The side of the third winding section 430 facing away from the fourth winding section 440 is connected to the second winding part 450; the first winding section 410 is located on the side of the first primary winding 200 facing away from the top surface 101, and the second winding section 420 is located on the side of the first primary winding 200 facing away from the second primary winding 300; the third winding section 430 is located on the side of the second primary winding 300 facing away from the top surface 101, and the fourth winding section 440 is located on the side of the second primary winding 300 facing away from the first primary winding 200. The other structures are the same as those of the first structure and will not be elaborated here.

[0050] The secondary winding 400 provided in this application extends from the outside of the first primary winding 200 facing away from the first outer side surface 103 to the outside of the first primary winding 200 facing away from the top surface 101, and then extends between the first primary winding 200 and the second primary winding 300 within the square-ring magnetic core 100 to the outside of the second primary winding 300 facing away from the top surface 101, and then extends to the outside of the second primary winding 300 facing away from the second outer side surface. That is, the first winding part, the second winding part 450, and the third winding part are connected to form a secondary winding 400 similar to a "ji" shape, so that the secondary winding 400 semi-covers the first primary winding 200 and the second primary winding 300, further avoiding the shielding of the primary winding and the square-ring magnetic core 100 on the secondary winding 400, further increasing the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, so that the heat generated by the secondary winding 400 due to carrying a high current can be dissipated more quickly, avoiding accumulation inside the device, and further avoiding the risk of the device temperature being too high, and further avoiding the reduction of the efficiency of the transformer 10 and reducing the potential safety hazard; the secondary winding 400 is wound around the outside of the primary winding like this, which can further improve the magnetic shielding effect, further reduce the magnetic saturation effect, and further improve the performance and stability of the transformer 10.

[0051] In one embodiment, the second winding portion 420 is perpendicularly connected to the first winding portion 410, the first winding portion 410 is perpendicularly connected to the second winding portion 450, the second winding portion 450 is perpendicularly connected to the third winding portion 430, and the third winding portion 430 is perpendicularly connected to the fourth winding portion 440. This further increases the contact area between the secondary winding 400 and the air, and ensures unobstructed heat dissipation, thereby improving the heat dissipation performance of the device. At the same time, it can further enhance the magnetic shielding effect, further reduce the magnetic saturation effect, and further improve the performance and stability of the transformer 10.

[0052] In one embodiment, the second winding portion 450 includes a first sub-portion 451 and a second sub-portion 452. One end of the first sub-portion 451 is connected to one end of the second sub-portion 452 to form a connection. The portions of the first sub-portion 451 and the second sub-portion 452 facing away from the connection are spaced apart to form a gap 600. The side of the first sub-portion 451 facing away from the connection is connected to the side of the first winding portion 410 facing away from the second winding portion 420. The side of the second sub-portion 452 facing away from the connection is connected to the side of the third winding portion 430 facing away from the fourth winding portion 440. The connection is located on the side near the base, and the opening of the gap 600 faces the side facing away from the base, so as to further increase the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, thereby improving the heat dissipation performance of the device. At the same time, it can further improve the magnetic shielding effect, further reduce the magnetic saturation effect, and further improve the performance and stability of the transformer 10.

[0053] In one embodiment, an insulating sheet 700 is provided within the gap 600 to disperse the electric field intensity, making the electric field distribution between the windings more uniform, reducing the risk of excessive local electric field, i.e. preventing breakdown and improving the reliability of the device.

[0054] In one embodiment, the first sub-section 451 and the second sub-section 452 are connected by a terminal 500, enabling bidirectional output, that is, the transformer 10 can simultaneously provide power to two different loads.

[0055] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, such as the combination of technical features between embodiments, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A transformer structure, characterized in that, The device includes a square ring magnetic core and windings. The windings include a first primary winding, a second primary winding, and a secondary winding. The first primary winding is wound on a first region of the square ring magnetic core, and the second primary winding is wound on a second region of the square ring magnetic core. The first region and the second region are arranged circumferentially along the square ring magnetic core, and the first primary winding and the second primary winding are spaced apart. The secondary winding is wound on at least a portion of the first primary winding and the second primary winding away from the outer side of the square ring magnetic core. The secondary winding includes a first winding section, a second winding section, and a third winding section connected in sequence. The second winding section is located inside the square ring magnetic core and between the first primary winding and the second primary winding. The first winding section and the third winding section are located outside the square ring magnetic core and are respectively located outside a portion of the first primary winding and the second primary winding. The second winding portion includes a first sub-part and a second sub-part. One end of the first sub-part is connected to one end of the second sub-part to form a connection. The portions of the first sub-part and the second sub-part that are away from the connection are spaced apart to form a gap. An insulating sheet is disposed in the gap.

2. The transformer structure according to claim 1, characterized in that, The first region and the second region are symmetrically arranged on the square ring magnetic core.

3. The transformer structure according to claim 1, characterized in that, The square ring magnetic core has a top surface, a bottom surface, a first outer surface, a second outer surface, a first inner surface, and a second inner surface. The top surface and the bottom surface are arranged opposite each other. The first inner surface and the second inner surface are arranged facing each other and are both connected to the bottom surface and the top surface. The first outer surface and the second outer surface are both connected to the top surface and the bottom surface. The first outer surface is located on the side of the square ring magnetic core away from the first inner surface, and the second outer surface is located on the side of the square ring magnetic core away from the second inner surface. The first primary winding is wound on the square ring magnetic core located on the first outer surface and the first inner surface, and the second primary winding is wound on the square ring magnetic core located on the second outer surface and the second inner surface.

4. The transformer structure according to claim 3, characterized in that, The first winding portion includes a first winding portion and a second winding portion connected to the first winding portion, wherein the side of the first winding portion opposite to the second winding portion is connected to the second winding portion; the third winding portion includes a third winding portion and a fourth winding portion connected to the third winding portion, wherein the side of the third winding portion opposite to the fourth winding portion is connected to the second winding portion. The first winding portion is located on the side of the first primary winding away from the top surface, and the second winding portion is located on the side of the first primary winding away from the second primary winding. The third winding portion is located on the side of the second primary winding away from the top surface, and the fourth winding portion is located on the side of the second primary winding away from the first primary winding.

5. The transformer structure according to claim 4, characterized in that, The second winding portion is perpendicularly connected to the first winding portion, the first winding portion is perpendicularly connected to the second winding portion, the second winding portion is perpendicularly connected to the third winding portion, and the third winding portion is perpendicularly connected to the fourth winding portion.

6. The transformer structure according to claim 4, characterized in that, The side of the first sub-part away from the connection point is connected to the side of the first winding part away from the second winding part, and the side of the second sub-part away from the connection point is connected to the side of the third winding part away from the fourth winding part.

7. The transformer structure according to claim 1, characterized in that, The first sub-part and the second sub-part are connected by a terminal.

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