Transformer structure

Abstract

The invention provides a transformer structure which comprises a square ring magnetic core and windings, the windings comprise a first primary winding, a second primary winding and a secondary winding, the first primary winding is wound on a first area of the square ring magnetic core, the second primary winding is wound on a second area of the square ring magnetic core, and the first area and the second area are arranged in the annular direction of the square ring magnetic core. The first primary winding and the second primary winding are arranged at intervals, the secondary winding is at least wound on the outer sides, deviating from the square ring magnetic core, of part of the first primary winding and part of the second primary winding, and the heat dissipation performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a transformer structure. Background Art

[0002] The current transformer devices usually include a magnetic core, a primary winding and a secondary winding. The secondary winding is usually placed in the center column of the magnetic core and is shielded by the side walls of the magnetic core and the primary winding. The secondary winding of the device is prone to severe heat generation due to the high current, and the existing device structure is not conducive to heat dissipation, which will lead to low device efficiency and certain safety hazards. Summary of the invention

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

[0004] The present application provides a transformer structure, including a square ring magnetic core and a winding, wherein the winding includes a first primary winding, a second primary winding and a secondary winding, wherein 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, wherein the first region and the second region are arranged along the circumferential direction of the square ring magnetic core, and the first primary winding is arranged at intervals from the second primary winding, and the secondary winding is at least wound on the outer side of a portion of the first primary winding and the second primary winding away from 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 magnetic 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 magnetic core and are respectively located on the outside of part 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 side surface, a second outer side surface, a first inner side surface and a second inner side surface, the top surface is arranged opposite to the bottom surface, the first inner side surface and the second inner side surface are arranged opposite to each other and are both connected to the bottom surface and the top surface, the first outer side surface and the second outer side surface are both connected to the top surface and the bottom surface, and the first outer side surface is located on the side of the square ring magnetic core away from the first inner side surface, the second outer side surface is located on the side of the square ring magnetic core away from the second inner side surface, the first primary winding is wound on the square ring magnetic core located on the first outer side surface and the first inner side surface, and the second primary winding is wound on the square ring magnetic core located on the second outer side surface and the second inner side 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, and a side of the first winding portion facing away from 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, and a side of the third winding portion facing away from the fourth winding portion is connected to the second winding portion;

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

[0010] The third winding portion is located at a side of the second primary winding away from the bottom surface, and the fourth winding portion is located at a 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, and a side of the first winding portion facing away from 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, and a side of the third winding portion facing away from the fourth winding portion is connected to the second winding portion;

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

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

[0014] In some embodiments, the second winding portion is vertically connected to the first winding portion, the first winding portion is vertically connected to the second winding portion, the second winding portion is vertically connected to the third winding portion, and the third winding portion is vertically 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 first sub-portion and the second sub-portion are spaced apart from the connection to form a gap, the side of the first sub-portion away from the connection is connected to the side of the first winding portion away from the second winding portion, and the side of the second sub-portion away from the connection is connected to the side of the third winding portion away from the fourth winding portion.

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

[0017] In some embodiments, the first subsection and the second subsection are connected via a terminal.

[0018] The present application provides a transformer structure, including a square ring magnetic core and a winding, the winding including a first primary winding, a second primary winding and a secondary winding, the first primary winding is wound on a first area of ​​the square ring magnetic core, the second primary winding is wound on a second area of ​​the square ring magnetic core, the first area and the second area are arranged along the circumferential direction of the square ring magnetic core, and the first primary winding is arranged at intervals from the second primary winding, and the secondary winding is at least wound on the outer side of a portion of the first primary winding and the second primary winding away from the square ring magnetic core, so as to improve the heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

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

[0021] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the secondary winding;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the square ring magnetic core provided by the present application;

[0023] Figure 4 is a second three-dimensional structural schematic diagram of the transformer provided by the present application;

[0024] Figure 5 yes Figure 4 Schematic diagram of the three-dimensional structure of the secondary winding and insulation sheet.

[0025] Reference numerals:

[0026] 10. Transformer; 100. Square ring core; 101. Top surface; 102. Bottom surface; 103. First outer side surface; 104. First inner side 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 body; 442. Second plate body; 443. Third plate body; 450. Second winding section; 451. First sub-section; 452. Second sub-section; 500. Terminal; 600. Gap; 700. Insulating sheet. DETAILED DESCRIPTION

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

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a person skilled in the art to which this application belongs. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items. The terms "connection", "electrical connection", and "electrical connection" used herein include any direct and indirect electrical or structural connection means. Therefore, if the text describes a first device 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 devices or connection means.

[0030] The present application provides a transformer structure, including a square ring magnetic core and a winding, the winding including a first primary winding, a second primary winding and a secondary winding, the first primary winding is wound on a first area of ​​the square ring magnetic core, the second primary winding is wound on a second area of ​​the square ring magnetic core, the first area and the second area are arranged along the circumferential direction of the square ring magnetic core, and the first primary winding is spaced apart from the second primary winding, and the secondary winding is at least wound on the outer side of a portion of the first primary winding and the second primary winding away from the square ring magnetic core.

[0031] In the prior art, the secondary winding usually needs to withstand a higher current, which causes it to generate more heat when working. The existing secondary winding is usually wound on the magnetic center column and is blocked by the primary winding and the magnetic core. Its heat dissipation area is limited and the heat dissipation channel is not smooth. This makes it difficult for the heat generated by the secondary winding to be dissipated in time, thereby causing the temperature of the device to rise. Especially in the process of converting the device from high voltage and low current to low voltage and high current, the heating problem of the secondary winding is particularly prominent; in the present application, by setting the secondary winding to be wound on the outside of at least part of the first primary winding and the second primary winding away from the square ring core, the primary winding and the square ring core are avoided from blocking the secondary winding, the contact area between the secondary winding and the air is increased, and the heat dissipation channel is smooth, so that the secondary winding generates more heat due to the higher current, which can be quickly dissipated to avoid accumulation inside the device, thereby avoiding the risk of excessive temperature of the device, thereby avoiding the efficiency of the transformer from being reduced and reducing safety hazards.

[0032] See also Figure 1-Figure 3 , Figure 1 This is a schematic diagram of the first three-dimensional structure of the transformer provided by the present application; Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the secondary winding; Figure 3Schematic diagram of the three-dimensional structure of the square ring magnetic core provided by the present application. The present application provides a transformer 10 structure, including a square ring magnetic core 100 and a winding, the winding including a first primary winding 200, a second primary winding 300 and a secondary winding 400, the first primary winding is wound on a first area of ​​the square ring magnetic core 100, the second primary winding 300 is wound on a second area of ​​the square ring magnetic core 100, the first area and the second area are arranged along the circumferential direction of the square ring magnetic core 100, and the first primary winding 200 is arranged at intervals from the second primary winding 300, and the secondary winding 400 is at least wound on the outer side of a portion of the first primary winding 200 and the second primary winding 300 away from the square ring magnetic core 100. Specifically, the transformer 10 device includes a square ring core 100 and a winding. The plane shape of the square ring core 100 is a ring-shaped square ring core 100 structure, which is not limited here; the square ring core 100 has a first area and a second area arranged along the ring direction, and the first area is connected to the second area; the winding includes a first primary winding 200, a second primary winding 300 and a secondary winding 400, and the first primary winding 200 and the second primary winding 300 are both formed by winding a wire on the square ring core 100, and the wire can be a Mylar wire or an insulated wire, etc.; the winding includes a first primary winding 200, a second primary winding The square ring core 100 includes a first primary winding 200 and a second primary winding 300, wherein the first primary winding 200 is wound on a first region of the square ring core 100, and the second primary winding 300 is wound on a second region of the square ring core 100. The first region and the second region are arranged along the circumferential direction of the square ring 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 core 100, and the secondary winding 400 is at least wound on the outer side of a portion of the first primary winding 200 and the second primary winding 300 away from the square ring core 100.

[0033] In the prior art, the secondary winding 400 usually needs to withstand a higher current, which causes it to generate more heat when working. The existing secondary winding 400 is usually wound on the magnetic center column and is blocked by the primary winding and the side wall of the magnetic core. Its heat dissipation area is limited and the heat dissipation channel is not smooth. This makes it difficult for the heat generated by the secondary winding 400 to be dissipated in time, thereby causing the temperature of the device to rise. In particular, in the process of converting the device from high voltage and low current to low voltage and high current, the heating problem of the secondary winding 400 is particularly prominent. In the present application, by setting the secondary winding 400 to be wound on the magnetic center column, the heat dissipation area is limited and the heat dissipation channel is not smooth. A small portion of the first primary winding 200 and the second primary winding 300 are away from the outside of the square ring core 100, so as to avoid the primary winding and the square ring core 100 from blocking the secondary winding 400, thereby increasing the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, so that the secondary winding 400 generates more heat due to the higher current, which can be quickly dissipated to avoid accumulation inside the device, thereby avoiding the risk of excessive temperature of the device, thereby avoiding the reduction of efficiency of the transformer 10 and reducing safety hazards, and is particularly suitable for the DCDC transformer 10 structure.

[0034] In the present application, by separately arranging the first primary winding 200 and the second primary winding 300 in two different areas on the square ring core 100, the magnetic field generated by the primary winding is more evenly 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, and the uniformity of the magnetic field distribution can enable the secondary winding 400 to more effectively sense the flux changes 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 first primary winding 200 and the second primary winding 300 are separately arranged in two different areas on the square ring core 100, which 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 the present application, by setting the secondary winding 400 to cover the first primary winding 200 and the second primary winding 300 on the outside of the square ring core 100, the space can be effectively utilized and better magnetic shielding can be achieved, effectively blocking the influence of the external magnetic field on the winding, and at the same time, the interference of the magnetic field generated by the winding itself on the external environment can be reduced. In this way, the magnetic saturation effect can be reduced, the performance degradation or damage of the transformer 10 under high voltage or high current can be prevented, and the performance and stability of the transformer 10 can be improved.

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

[0037] In the present application, the number of turns of the external secondary winding 400 can be adjusted according to demand and can be adapted to a variety of 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, so as to further make the magnetic field generated by the primary winding inside the square ring core 100 and the temperature distribution on the square ring core 100 more uniform. The uniform distribution of the magnetic field 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 flux changes 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 temperature distribution on the square ring core 100 is more uniform, which can further prevent the occurrence of local overheating and further improve the thermal stability and reliability of the transformer 10; in addition, the square ring core 100 is symmetrically arranged, which 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 core 100 can be a square, U-shaped, triangular or hexagonal annular core, or a UU / UI / UF / UY / FT type paired core, which is not limited here. The square ring core 100 can be an integrally formed structure to improve mechanical strength and be able to withstand greater external forces and vibrations, thereby improving the durability and reliability of the transformer 10. At the same time, the square ring core 100 is formed using an integrally formed structure to reduce the leakage flux of the inductor and improve the magnetic shielding effect; the square ring core 100 can also be a splicing structure, and the splicing can be fixed by dispensing glue, that is, the splicing is connected by colloid, so that if a part of the square ring core 100 fails or is damaged, the splicing structure can replace the damaged part separately without replacing the entire square ring core 100, which helps to reduce maintenance costs and time and facilitates the winding of the winding.

[0040] In this embodiment, a square-ring magnetic core 100 with a splicing structure and in the shape of a figure-eight ring structure is taken as an example 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 opposite to each other. 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 "回" shape. 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 magnetic core 100 and between the first primary winding 200 and the second primary winding 300, and the first winding portion and the third winding portion are located outside the square ring magnetic core 100 and are respectively located on the outside of part 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, which is not limited here. The metal material has good thermal conductivity and is helpful for heat dissipation, thereby reducing the temperature rise of the transformer 10; the secondary winding 400 can be formed by hardware die-casting, so that the secondary winding 400 can withstand greater mechanical stress and thermal stress, and through die-casting, due to the accuracy of the mold, the manufactured secondary winding 400 has high precision and consistency, which can ensure the stable performance of the transformer 10; 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 in 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. On the other hand, that is, 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 of the square ring core 100. The secondary winding 400 is arranged in this way to fully utilize the space, and can further avoid the primary winding and the square ring core 100 from blocking the secondary winding 400, further increase the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, so that the secondary winding 400 generates more heat due to the higher current, which can be dissipated more quickly, avoiding accumulation inside the device, thereby avoiding the risk of excessive temperature of the device, and thereby avoiding the reduction of efficiency of the transformer 10 and reducing safety hazards; the secondary winding 400 is wound on the outside of the primary winding in this way, 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.

[0042] In one embodiment, the square ring magnetic core 100 has a top surface 101, a bottom surface 102, a first outer side surface 103, a second outer side surface, a first inner side surface 104 and a second inner side surface. The top surface 101 is arranged opposite to the bottom surface 102, the first inner side surface 104 and the second inner side surface are arranged opposite to each other and are both connected to the bottom surface 102 and the top surface 101, the first outer side surface 103 and the second outer side surface are both connected to the top surface 101 and the bottom surface 102, and the first outer side surface 103 is located on a side of the square ring magnetic core 100 away from the first inner side surface 104, and the second outer side surface is located on a side of the square ring magnetic core 100 away from the second inner side surface. The first primary winding 200 is wound on the square ring magnetic core 100 located on the first outer side surface 103 and the first inner side surface 104, and the second primary winding 300 is wound on the square ring magnetic core 100 located on the second outer side surface and the second inner side surface.Specifically, the square ring magnetic core 100 has a top surface 101, a bottom surface 102, a first outer side surface 103, a second outer side surface, a third outer side surface, a fourth outer side surface, a first inner side surface 104, a second inner side surface, a third inner side surface and a fourth inner side surface. The top surface 101 is arranged opposite to the bottom surface 102, the first inner side surface 104 and the second inner side surface are arranged opposite to each other and are both connected to the bottom surface 102 and the top surface 101, the third inner side surface and the fourth inner side surface are arranged opposite to each other and are both connected to the bottom surface 102 and the top surface 101, the first inner side surface 104, the third inner side surface, the second inner side surface and the fourth inner side surface are connected in sequence, and the first outer side surface 101 is arranged opposite to each other. 3 and the second outer side surface are arranged one-to-one and are both connected to the top surface 101 and the bottom surface 102, the third outer side surface and the fourth outer side surface are arranged one-to-one and are both connected to the top surface 101 and the bottom surface 102, the first outer side surface 103, the third outer side surface, the second outer side surface and the fourth outer side surface are connected in sequence, and the first outer side surface 103 is located on the side of the square ring magnetic core 100 away from the first inner side surface 104, the second outer side surface is located on the side of the square ring magnetic core 100 away from the second inner side surface, the third outer side surface is located on the side of the square ring magnetic core 100 away from the third inner side surface, and the fourth outer side surface is located on the side of the square ring magnetic core 100 away from the fourth inner side surface; The square ring magnetic core 100 is an example of a U-shaped ring magnetic core, the first inner side surface 104 and the first outer side surface 103 are located on the first winding pole 110, the second outer side surface and the second outer side surface are located on the second winding pole 120, the fourth inner side surface and the fourth outer side surface are located on the magnetic pole, the first primary winding 200 is wound on the first winding pole 110, and the second primary winding 300 is wound on the second winding pole 120, that is, the first primary winding 200 is wound on the square ring magnetic core 100 located on the first outer side surface 103 and the first inner side surface 104, and the second primary winding 300 is wound on the square ring magnetic core 100 located on the second outer side surface and the second inner side surface. The ring core 100 is further prevented from shielding the secondary winding 400 by the primary winding and the square ring core 100, thereby further increasing the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, so that the secondary winding 400 generates more heat due to the higher current, which can be dissipated more quickly to avoid accumulation inside the device, thereby avoiding the risk of excessive device temperature, thereby avoiding the reduction of the efficiency of the transformer 10 and reducing safety hazards. At the same time, the magnetic shielding effect can be further improved, the magnetic saturation effect can be further reduced, and the performance and stability of the transformer 10 can be further improved.

[0043] In one embodiment, the first winding portion includes a first winding portion 410 and a second winding portion 420 connected to the first winding portion 410, and the first winding portion 410 is connected to the second winding portion 450 on a side away from the second winding portion 420; the third winding portion includes a third winding portion 430 and a fourth winding portion 440 connected to the third winding portion 430, and the third winding portion 430 is connected to the second winding portion 450 on a side away from the fourth winding portion 440; the first winding portion 410 is located at the first primary winding 200 away from the top 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 side surface 103 to the outside of the first primary winding 200 away from the top surface 101, and then to the side of the square ring magnetic core 1 00 extends between the first primary winding 200 and the second primary winding 300 to the outside of the second primary winding 300 away from the bottom surface 102, and then extends to the outside of the second primary winding 300 away from the second outer side surface, that is, the first winding portion, the second winding portion 450 and the third winding portion are connected to form a secondary winding 400 similar to an "S" shape, so that the secondary winding 400 half covers the first primary winding 200 and the second primary winding 300, so as to further avoid the primary winding and the square ring magnetic core 100 on the secondary winding. The shielding of 400 further increases the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, so that the secondary winding 400 generates more heat due to the higher current, which can be dissipated more quickly to avoid accumulation inside the device, thereby avoiding the risk of excessive device temperature, thereby avoiding the reduction of transformer 10 efficiency and reducing safety hazards. At the same time, the magnetic shielding effect can be further improved, the magnetic saturation effect can be further reduced, and the performance and stability of the transformer 10 can be further improved.

[0044] In one embodiment, the second winding portion 420 is vertically connected to the first winding portion 410, the first winding portion 410 is vertically connected to the second winding portion 450, the second winding portion 450 is vertically connected to the third winding portion 430, and the third winding portion 430 is vertically connected to the fourth winding portion 440, 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, the magnetic shielding effect can be further improved, the magnetic saturation effect can be further reduced, and the performance and stability of the transformer 10 can be further improved.

[0045] In one embodiment, the length, width and height of the first winding portion 410 and the third winding portion 430 are the same, and the length, width and height of the second winding portion 420, the second winding portion 450 and the fourth winding portion 440 are the same, 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.

[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, and an end of the first plate 441 facing away from the second plate 442 is connected to an end of the third winding portion 430 facing away from the second winding portion 450. The first plate 441 and the second plate 442 and 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 the two are arranged relative to each other, thereby further increasing the contact area between the secondary winding 400 and the air and improving the heat dissipation performance of the device. At the same time, the magnetic shielding effect can be further improved, the magnetic saturation effect can be further reduced, and the performance and stability of the transformer 10 can be further improved.

[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 also includes a base and a terminal 500, the terminal 500 and the secondary winding 400 are fixed on the base, the wire 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, and the bottom surface 102 of the square ring core 100 is close to one side of the base.

[0049] See also Figure 4 and Figure 5 , and please continue to see Figure 3 , Figure 4 is a second three-dimensional structural schematic diagram of the transformer provided by the present application; Figure 5 yes Figure 4Schematic diagram of the three-dimensional structure of the secondary winding and the insulating sheet in the figure. It should be noted that the difference between the second structure and the first structure is that the first winding portion includes a first winding portion 410 and a second winding portion 420 connected to the first winding portion 410, and the first winding portion 410 is connected to the second winding portion 450 on the side away from the second winding portion 420; the third winding portion includes a third winding portion 430 and a fourth winding portion 440 connected to the third winding portion 430, and the third winding portion 430 is connected to the fourth winding portion 440 on the side away from the fourth winding portion 440. The two winding parts 450 are connected; the first winding part 410 is located on the side of the first primary winding 200 away from the top surface 101, and the second winding part 420 is located on the side of the first primary winding 200 away from the second primary winding 300; the third winding part 430 is located on the side of the second primary winding 300 away from the top surface 101, and the fourth winding part 440 is located on the side of the second primary winding 300 away from the first primary winding 200. The other structures are the same as the first structure and will not be repeated here.

[0050] The secondary winding 400 provided in the present application extends from the outer side of the first primary winding 200 away from the first outer side surface 103 to the outer side of the first primary winding 200 away from the top surface 101, and then extends to the outer side of the second primary winding 300 away from the top surface 101 between the first primary winding 200 and the second primary winding 300 in the square ring magnetic core 100, and then extends to the outer side of the second primary winding 300 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 the shape of a "J", so that the secondary winding 400 half covers the first primary winding 200 and the second primary winding 3 00, so as to further avoid the primary winding and the square ring core 100 from blocking the secondary winding 400, further increase the contact area between the secondary winding 400 and the air, and the heat dissipation channel is unobstructed, so that the secondary winding 400 generates more heat due to the higher current, which can be dissipated more quickly to avoid accumulation inside the device, thereby avoiding the risk of excessive device temperature, thereby avoiding the reduction of the efficiency of the transformer 10 and reducing safety hazards; the secondary winding 400 is wound on the outside of the primary winding in this way, 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 vertically connected to the first winding portion 410, the first winding portion 410 is vertically connected to the second winding portion 450, the second winding portion 450 is vertically connected to the third winding portion 430, and the third winding portion 430 is vertically connected to the fourth winding portion 440, 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, the magnetic shielding effect can be further improved, the magnetic saturation effect can be further reduced, and the performance and stability of the transformer 10 can be further improved.

[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, and the first sub-portion 451 and the second sub-portion 452 are spaced apart from the connection to form a gap 600, and the side of the first sub-portion 451 away from the connection is connected to the side of the first winding portion 410 away from the second winding portion 420, and the side of the second sub-portion 452 away from the connection is connected to the side of the third winding portion 430 away from the fourth winding portion 440, and the connection is located on the side close to the base, and the opening of the gap 600 faces the side 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, the magnetic shielding effect can be further improved, the magnetic saturation effect can be further reduced, and the performance and stability of the transformer 10 can be further improved.

[0053] In one embodiment, an insulating sheet 700 is provided in the gap 600 to disperse the electric field strength, so that the electric field is more evenly distributed between the windings, reducing the risk of excessive local electric field, that is, 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 via the terminal 500 , so that bidirectional output can be achieved, that is, the transformer 10 can provide electrical energy to two different loads at the same time.

[0055] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structural or equivalent process transformations made using the contents of the specification and drawings of the present application, such as the mutual combination of technical features between the embodiments, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A transformer structure, characterized in that: The invention comprises a square ring magnetic core and windings, wherein the windings comprise a first primary winding, a second primary winding and a secondary winding, wherein 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, wherein the first region and the second region are arranged along the circumferential direction of the square ring magnetic core, and the first primary winding is arranged at intervals from the second primary winding, and the secondary winding is at least wound on the outer sides of a part of the first primary winding and the second primary winding away from the square ring magnetic core.

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 secondary winding includes a first winding portion, a second winding portion and a third winding portion which are connected in sequence, the second winding portion is located inside the square ring magnetic 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 magnetic core and are respectively located on the outside of part of the first primary winding and the second primary winding.

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

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

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

7. The transformer structure according to claim 5 or 6, characterized in that: The second winding portion is vertically connected to the first winding portion, the first winding portion is vertically connected to the second winding portion, the second winding portion is vertically connected to the third winding portion, and the third winding portion is vertically connected to the fourth winding portion.

8. The transformer structure according to claim 6, characterized in that: 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 first sub-portion and the second sub-portion are spaced apart from the connection to form a gap, the side of the first sub-portion away from the connection is connected to the side of the first winding portion away from the second winding portion, and the side of the second sub-portion away from the connection is connected to the side of the third winding portion away from the fourth winding portion.

9. The transformer structure according to claim 8, characterized in that: An insulating sheet is arranged in the gap.

10. The transformer structure according to claim 9, characterized in that: The first sub-section and the second sub-section are connected via a terminal.

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