Winding structure, magnetic assembly and power supply

Abstract

The utility model relates to a winding structure, a magnetic assembly and a power supply, the winding structure comprises a connecting part and two conducting strips arranged oppositely, each conducting strip comprises a main body and a pin, the main body comprises a first end and a second end, the first end is connected with the connecting part, the second end is connected with the pin, and an accommodating space is defined between the connecting part and the opposite main body; in the installation direction of the winding structure, the height difference between the second ends and the connecting parts is larger than or equal to 0, the total number of the connecting parts is equal to the total number of the bodies on the conducting strips and is N, and N is a positive integer. In the winding structure, different main bodies can be connected through the connecting parts, so that each main body can be effectively and electrically connected with a circuit board only through one pin, the number of welding points is reduced, and the wiring design difficulty of the circuit board is reduced; and the free ends of the pins protrude out of the surface of the side, deviating from the accommodating space, of the connecting part, so that the difficulty of connection between the pins and the circuit board is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the electrical technical field, in particular to a winding structure, a magnetic assembly and a power supply. BACKGROUND

[0002] In a transformer in which the secondary winding needs to output a large current, a stamped copper sheet is usually used as the secondary winding to increase the current-carrying capacity. Please refer to Figures 1 to 2 Since the copper sheet A is a planar stamping, when two turns of the copper sheet A need to be connected in series, a connection by wiring on a circuit board (also referred to as a PCB board) of the transformer is usually used. Specifically, two pin terminals are formed on each copper sheet A, which are a first connection end a1 and a second connection end a2, and the first connection end a1 and the second connection end a2 are both used to be soldered together with the PCB board. When two turns of the copper sheet A need to be connected in series, the first connection end a1 of one copper sheet A is connected to the second connection end a2 of another copper sheet A through the PCB board, as shown by the dashed line in Figure 2 . In this way, not only unnecessary solder joints are increased, but also the wiring design of the PCB board is made more difficult.

[0003] Therefore, the related art proposes a flat wire vertical winding scheme. Specifically, please refer to Figure 3 . The secondary winding B includes multiple layers of copper sheets A (one layer of copper sheet A corresponds to one turn of the coil), the copper sheets A are connected end to end between the copper sheets A to achieve series connection, and only a first connection end a1 and a second connection end a2 are provided on the first and last layers of the copper sheets A, respectively. In this way, only the first connection end a1 and the second connection end a2 need to be soldered together with the PCB board, which not only reduces the number of solder joints, but also reduces the difficulty of the wiring design of the PCB board.

[0004] However, the flat wire vertical winding scheme has a significant disadvantage. Please refer to Figure 3 and Figure 4 . That is, there is no space between the coils of the secondary winding B to place the primary winding C, and the primary winding C can only be arranged on one side of the secondary winding B. The magnetic field intensity at the position where the primary winding C and the secondary winding B are close to each other is relatively strong. According to Ampere's Law , the magnetic field intensity at the position where the primary winding C and the secondary winding B are close to each other is . The greater the magnetic field intensity, the greater the eddy current loss, which is not conducive to improving the efficiency of the transformer. SUMMARY

[0005] Embodiments of the present application provide a winding structure, a magnetic assembly and a power supply to at least partially solve the above technical problems.

[0006] To achieve the above object, according to a first aspect of the present application, embodiments of the present application provide a winding structure, comprising a connecting part and two oppositely arranged conductive sheets, the conductive sheet comprising a main body and a pin, the main body comprising a first end and a second end, the first end being connected with the connecting part, the second end being connected with the pin, a containing space being defined between the connecting part and the opposite main body;

[0007] Wherein, along the mounting direction of the winding structure, the height difference between the second end and the connecting part is greater than or equal to 0, the total number of the connecting parts is equal to the total number of the main bodies on each conductive sheet, and both are N, N is a positive integer.

[0008] In some embodiments, the connecting part comprises a first connecting part and a second connecting part, the first end of the main body is connected with the second connecting part through the first connecting part; along the mounting direction of the winding structure, the height difference between the second end of the main body and the second connecting part is greater than or equal to 0.

[0009] In some embodiments, the pin comprises a first pin and a second pin, the total number of the first pin is 2, and the total number of the second pin is N-1; wherein the second pin is formed by connecting two adjacent first pins.

[0010] In some embodiments, N=1, two first pins are respectively connected with the second ends of two main bodies and are located on both sides of the connecting part; two main bodies are configured to have the same current flow direction.

[0011] In some embodiments, N≥2, two adjacent main bodies on each conductive sheet are configured to have opposite current flow directions, and two main bodies located opposite to each other on two conductive sheets are configured to have the same current flow direction.

[0012] In some embodiments, the second pin is arranged between the first pins, adjacent first pins and second pins are respectively located on two conductive sheets, and two adjacent second pins are also respectively located on two conductive sheets.

[0013] In some embodiments, a mounting through hole is formed on the main body, the mounting through holes of two main bodies located opposite to each other correspond to each other and jointly form a containing channel; a gap is also formed on the main body, the mounting through hole and the gap are connected, and the pin and the connecting part are respectively located on both sides of the gap.

[0014] In some embodiments, the connecting part and the two oppositely arranged conductive sheets are integrally formed by stamping and bending.

[0015] In some embodiments, the pin is provided with a heat gathering hole and / or a heat gathering groove.

[0016] According to a second aspect of the present application, the embodiments of the present application provide a magnetic assembly, comprising a winding and two oppositely arranged magnetic cores,

[0017] The winding comprises a first winding and a second winding, the first winding is the winding structure as described above, and the second winding is located in the accommodation space;

[0018] The magnetic core comprises a cover plate, a winding column and a common column, one end of the winding column and the common column is connected with the cover plate, the winding column is arranged in an accommodation channel, the accommodation channel is formed by two mounting through holes of the two main bodies on the two conductive sheets in opposite positions, the mounting through hole, the accommodation channel and the winding column are in corresponding positions; wherein the number of the winding column is N, and the number of the common column is greater than or equal to 0.

[0019] In some embodiments, the first winding is a primary winding, and the second winding is a secondary winding, or the first winding is a secondary winding, and the second winding is a primary winding, and the primary winding is a line cake structure.

[0020] In some embodiments, along the thickness direction of the cover plate, a heat dissipation groove penetrating through the cover plate is arranged on the side wall of the cover plate.

[0021] According to a third aspect of the present application, the embodiments of the present application provide a power supply, comprising a circuit board and a magnetic assembly as described above, and the magnetic assembly is in conduction with the circuit board through the pin.

[0022] The winding structure provided by the embodiments of the present application has the following advantages:

[0023] Firstly, by defining the accommodation space between the connecting part and the opposite main body, when the winding structure is used as one of the primary winding and the secondary winding, and the other of the primary winding and the secondary winding is arranged in the accommodation space, the magnetic field intensity at the position where the primary winding and the secondary winding are close to each other can be significantly reduced, thereby reducing the loss;

[0024] Secondly, in the winding structure, the main bodies on different conductive sheets can be connected through the connecting part, so that each main body can be effectively electrically connected with the circuit board through only one pin, which not only reduces the number of welding points, but also reduces the difficulty of wiring design of the circuit board;

[0025] Again, since the free end of the pin protrudes from the side surface of the connecting portion away from the accommodating space, the accommodating space and the connecting portion are elevated, so that when the pin is connected with the circuit board, the risk of interference between the connecting portion and the circuit board can be reduced, the operation space for connecting the pin with the circuit board is increased, and the difficulty of connecting the pin with the circuit board is reduced.

[0026] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0028] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0029] Figure 1 is a schematic diagram of the three-dimensional structure of the copper sheet provided by the prior art Figure 1 ;

[0030] Figure 2 is a schematic diagram of the three-dimensional structure of the copper sheet provided by the prior art Figure 2 ;

[0031] Figure 3 is a schematic diagram of the three-dimensional structure of the primary winding and the secondary winding provided by the prior art

[0032] Figure 4 is Figure 3 the magnetic field strength change diagram when the primary winding and the secondary winding in the prior art are assembled together

[0033] Figure 5 is a schematic diagram of the three-dimensional structure of the winding provided by the embodiments of the present application

[0034] Figure 6 is a schematic diagram of the three-dimensional structure of the first winding structure provided by the embodiments of the present application

[0035] Figure 7 is Figure 6 the schematic diagram of the structure of the first winding structure in the expanded state

[0036] Figure 8 is Figure 6 the top view schematic diagram of the first winding structure in the prior art

[0037] Figure 9 isFigure 6 A schematic diagram of the main view of the first winding structure in the diagram;

[0038] Figure 10 This is a schematic diagram of the main view of the second winding structure provided in the embodiments of this application;

[0039] Figure 11 yes Figure 10 A three-dimensional structural diagram of the second type of winding structure;

[0040] Figure 12 yes Figure 10 A schematic diagram of the second winding structure shown in the unfolded state;

[0041] Figure 13 This is a schematic diagram of the main view of the third winding structure provided in the embodiments of this application;

[0042] Figure 14 yes Figure 13 A three-dimensional structural diagram of the third type of winding structure;

[0043] Figure 15 yes Figure 13 A schematic diagram of the third winding structure shown in the unfolded state;

[0044] Figure 16 This is a three-dimensional structural schematic diagram of the first type of magnetic component provided in the embodiments of this application;

[0045] Figure 17 yes Figure 16 An exploded view of the magnetic components shown;

[0046] Figure 18 yes Figure 16 The diagram shows the change in magnetic field strength when the primary and secondary windings of the magnetic component are assembled together.

[0047] Figure 19 This is a schematic diagram of the three-dimensional structure of the second type of magnetic component provided in the embodiments of this application;

[0048] Figure 20 This is a three-dimensional structural schematic diagram of the third type of magnetic component provided in the embodiments of this application;

[0049] Figure 21 yes Figure 20 An exploded view of the magnetic components shown;

[0050] Figure 22 yes Figure 20 A top view of the magnetic component shown.

[0051] Figure 23 This is a top view of the fourth type of magnetic component provided in the embodiments of this application;

[0052] Figure 24 is a perspective structural schematic view of a first power supply provided by an embodiment of the present application;

[0053] Figure 25 is a perspective structural schematic view of a second power supply provided by an embodiment of the present application;

[0054] Figure 26 is a perspective structural schematic view of a third power supply provided by an embodiment of the present application.

[0055] Legend of reference signs:

[0056] A, copper sheet; B, secondary winding; C, primary winding;

[0057] a1, first connection end; a2, second connection end;

[0058] 10, winding structure;

[0059] 1, connecting portion; 11, first connecting portion; 12, second connecting portion;

[0060] 2, conductive sheet;

[0061] 21, main body; 211, first end; 212, second end; 213, mounting through hole; 214, gap;

[0062] 22, pin; 221, first pin; 222, second pin; 223, heat collecting hole;

[0063] 3, accommodating space;

[0064] 4, accommodating channel;

[0065] 100, magnetic assembly;

[0066] 101, winding; 1011, first winding; 1012, second winding;

[0067] 20, magnetic core; 201, cover plate; 2011, heat dissipation groove; 202, winding post; 203, common post;

[0068] 1000, power supply;

[0069] 200, circuit board; 2001, first circuit board; 2002, second circuit board. DETAILED DESCRIPTION

[0070] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the protection scope of the present application.

[0071] In order to facilitate the understanding of the scheme of the present application, the spline curves and arrows used in the labels in the drawings are described as follows: the components indicated by the spline curves without arrows are solid components, i.e., components with solid structures; and the components indicated by the spline curves with arrows are virtual components, i.e., components without solid structures.

[0072] In a first aspect, referring to Figures 5 to 24 The embodiments of the present application provide a winding structure 10, which is used in a magnetic assembly 100, where the magnetic assembly 100 includes at least one of a transformer, an inductor, etc.

[0073] Specifically, the winding structure 10 includes a connecting part 1 and two oppositely arranged conductive sheets 2. The conductive sheet 2 includes a main body 21 and a pin 22, the main body 21 includes a first end 211 and a second end 212, the first end 211 is connected with the connecting part 1, the second end 212 is connected with the pin 22, and a containing space 3 is defined between the connecting part 1 and the opposite main body 21; wherein the height difference between the second end 212 and the connecting part 1 is greater than or equal to 0, the total number of the connecting part 1 is equal to the total number of the main body 21 on each conductive sheet 2, and both are N, where N is a positive integer.

[0074] The winding structure 10 includes the connecting part 1 and the two conductive sheets 2, and the connecting part 1 connects the two conductive sheets 2. As an example, the connecting part 1 and the two conductive sheets 2 can be integrally formed, or the connecting part 1 and the two conductive sheets 2 can be welded together.

[0075] The two conductive sheets 2 are oppositely arranged, specifically, the two conductive sheets 2 are arranged face to face and spaced apart from each other. It can be understood that the connecting part 1 and the conductive sheet 2 are located on different planes. As an example, the two conductive sheets 2 are in parallel relationship, and the connecting part 1 and the conductive sheet 2 are perpendicular to each other.

[0076] As an example, one of the conductive sheets 2 can be referred to as a first conductive sheet, and the other as a second conductive sheet. The side surface of the first conductive sheet faces the second conductive sheet, and similarly, the side surface of the second conductive sheet faces the first conductive sheet. However, the first conductive sheet and the second conductive sheet are not in direct contact with each other, and the first conductive sheet and the second conductive sheet are indirectly connected through the connecting part 1, so that the current can flow from the first conductive sheet to the second conductive sheet through the connecting part 1.

[0077] The whole of the conductive sheet 2 refers to a conductor that can conduct electricity and is in the form of a sheet. As an example, the conductive sheet 2 is a metal sheet, such as a copper sheet.

[0078] The conductive sheet 2 comprises a main body 21 and a pin 22. It is to be noted that the number of main bodies 21 on a single conductive sheet 2 can be one or more, and the number of pins 22 can be one or more.

[0079] In detail, the total number of the connection portions 1 is equal to the total number of the main bodies 21 on each conductive sheet 2, and both are N, where N is a positive integer. As an example, when the number of main bodies 21 on each conductive sheet 2 is one, the number of connection portions 1 is also one, and the connection portion 1 connects two main bodies 21; when the number of main bodies 21 on each conductive sheet 2 is two, the number of connection portions 1 is also two, one of which connects two main bodies 21, and the other of which connects the remaining two main bodies 21.

[0080] The main body 21 comprises a first end 211 and a second end 212, the first end 211 is connected to the connection portion 1, and the second end 212 is connected to the pin 22, that is, the connection portion 1 and the pin 22 are connected to the two ends of the main body 21 respectively, and the main body 21 is connected between the connection portion 1 and the pin 22. In this way, the flow path of the current in the winding structure 10 is: connection portion 1-main body 21-pin 22. It can be that the current flows from the connection portion 1 to the pin 22 through the main body 21, or the current flows from the pin 22 to the connection portion 1 through the main body 21.

[0081] It is to be noted that, since the connection portion 1 and the pin 22 are connected to different ends of the main body 21 respectively, the pin 22 is spaced apart from the connection portion 1, that is, the pin 22 is not directly connected to the connection portion 1. In this way, direct communication of the current between the pin 22 and the connection portion 1 can be avoided.

[0082] In order to more clearly illustrate the relationship between the pin 22 and the connection portion 1, the pin 22 on the first conductive sheet can be referred to as a left pin, and the pin 22 on the second conductive sheet can be referred to as a right pin. In the winding structure 10, the pin 22 is spaced apart from the connection portion 1, specifically, the left pin, the right pin and the connection portion 1 are spaced apart from each other, that is, the left pin and the right pin are spaced apart from each other, the left pin and the connection portion 1 are spaced apart from each other, and the right pin and the connection portion 1 are spaced apart from each other.

[0083] Optionally, the pins 22 distributed on different conductive sheets 2 are separated by the connection portions 1, that is, the pins 22 connected by the opposite two main bodies 21 are distributed on the two sides of the connection portion 1 connecting the opposite two main bodies 21, rather than on the same side of the connection portion 1. As an example, please refer to Figure 7, the left pin is located at one side of the connecting part 1, and the right pin is located at the other side of the connecting part 1. The purpose of such arrangement is to make the current flow in the same direction in the winding structure 10 on the first body and the second body, for example Figure 6 indicated by the dashed line with arrows, all in the clockwise direction.

[0084] Since the two conductive sheets 2 are oppositely arranged, the bodies 21 on the two conductive sheets 2 are also oppositely arranged in pairs. In this way, the bodies 21 oppositely arranged in pairs on different conductive sheets 2 and the connecting part 1 connecting the two bodies 21 can jointly define a containing space 3.

[0085] As an example, the body 21 on the first conductive sheet is referred to as the first body, the body 21 on the second conductive sheet is referred to as the second body, the first body is opposite to the second body, and both the first body and the second body are connected with the connecting part 1, and the first body, the second body and the connecting part 1 jointly define the containing space 3.

[0086] As an example, the winding structure 10 is a secondary winding, and the containing space 3 is used to accommodate a primary winding. The connecting part 1 can support the primary winding, and the two bodies 21 can limit the primary winding from both sides. Of course, in other examples, the winding structure 10 can also be a primary winding, and the containing space 3 is used to accommodate a secondary winding.

[0087] Please refer to Figure 5 , Figure 6 , Figure 16 and Figure 18 , the winding structure 10 is a secondary winding, and the containing space 3 is used to accommodate a primary winding. As an example, when the primary winding is loaded in the containing space 3, the magnetic field strength H is taken as the longitudinal direction, and the magnetic field strength H corresponding to the spatial position of a secondary winding rises from 0 to Since the current between the primary winding and the secondary winding is opposite, with the current of the primary winding being opposite, the magnetic field strength H corresponding to the spatial position of the primary winding falls from to , and the magnetic field strength H corresponding to the spatial position of the other secondary winding rises from to 0 again. Since the current of the primary winding and the secondary winding is opposite, the magnetic field strength H of the primary winding is falling, which is represented by a negative slope. The air position has no current, so the magnetic field strength remains unchanged.

[0088] It can be seen that since the two conductive sheets 2 have a containing space 3, the containing space 3 is used to accommodate a primary winding, when the primary winding is accommodated in the containing space 3, the magnetic field strength of the position where the primary winding and the secondary winding are close to each other is Compared with the method of flat wire vertical winding (please refer to Figure 3 and Figure 4), the magnetic field strength is halved, and the corresponding loss is also reduced.

[0089] Please continue to see Figure 5 , Figure 6 , Figure 16 and Figure 18 , the winding structure 10 includes a connecting part 1 and two opposite conductive sheets 2, each conductive sheet 2 includes a main body 21, so that the winding structure 10 is configured to include two continuous coils formed by one of the conductive sheets 2 to the other conductive sheet 2, wherein each main body 21 corresponds to a coil, and the connecting part 1 connects the two main bodies 21, thereby realizing the series connection between the two coils.

[0090] It can be seen that, compared with the separate arrangement of the conductive sheet 2 (see Figure 1 and Figure 2 ), the total number of pins 22 required by the winding structure 10 composed of two conductive sheets 2 is reduced from 4 to 2, and the number of pins 22 is significantly reduced. That is, in the present application, since the main bodies 21 on different conductive sheets 2 can be connected by the connecting part 1, each main body 21 only needs to be effectively electrically connected to the circuit board 200 through one pin 22.

[0091] Further, the height difference between the second end 212 and the connecting part 1 in the mounting direction of the winding structure 10 is greater than or equal to 0, so that the height difference between the pin 22 connected to the second end 212 and the connecting part 1 in the mounting direction of the winding structure 10 is greater than 0, that is, the pin 22 protrudes from the side surface of the connecting part 1 away from the accommodation space 3. Please see Figure 17 , here the mounting direction of the winding structure 10 refers to the direction in which the winding structure 10 is mounted to the circuit board 200.

[0092] Generally, the pin 22 is connected to the main body 21, specifically the end of the pin 22 is connected to the main body 21, and the other end of the pin 22 is formed as a free end. The free end of the pin 22 extends away from the main body 21 and protrudes from the side surface of the connecting part 1 away from the accommodation space 3.

[0093] As an example, in the winding structure 10, the line (see the dashed line in Figure 9 ) connecting the free end of the left pin and the free end of the right pin is located on the side of the connecting part 1 away from the accommodation space 3, that is, the distance between the line connecting the free end of the left pin and the free end of the right pin and the side surface of the connecting part 1 away from the accommodation space 3 is greater than zero.

[0094] The pin 22 is specifically an electrical connection terminal, which is used to connect with the circuit board 200, so as to realize the electrical connection between the winding structure 10 and the circuit board 200. As an example, the pin 22 can be inserted into the conductive hole (for example, plated through hole (PTH) or the like) formed on the circuit board 200 and welded together with the hole wall of the conductive hole by soldering. Since the free end of the pin 22 protrudes from the side surface of the connecting portion 1 away from the accommodation space 3, when the pin 22 is connected with the circuit board 200, the interference caused by the connecting portion 1 can be reduced, thereby reducing the difficulty of connecting the pin 22 with the circuit board 200.

[0095] In summary, the winding structure 10 provided by the embodiment of the present application has the following advantages:

[0096] Firstly, by defining the accommodation space 3 between the connecting portion 1 and the opposite main body 21, when the winding structure 10 is used as one of the primary winding and the secondary winding, and the other one of the primary winding and the secondary winding is arranged in the accommodation space 3, the magnetic field intensity at the position where the primary winding and the secondary winding are close to each other can be significantly reduced, thereby reducing the loss.

[0097] Secondly, in the winding structure 10, the main bodies 21 on different conductive sheets 2 can be connected through the connecting portion 1, so that each main body 21 can be effectively electrically connected with the circuit board 200 through only one pin 22. Therefore, the number of soldering points can be reduced, and the difficulty of wiring design of the circuit board 200 can be reduced.

[0098] Thirdly, since the free end of the pin 22 protrudes from the side surface of the connecting portion 1 away from the accommodation space 3, the accommodation space 3 and the connecting portion 1 are lifted. Therefore, when the pin 22 is connected with the circuit board 200, the risk of interference between the connecting portion 1 and the circuit board 200 can be reduced, thereby increasing the operation space for connecting the pin 22 with the circuit board 200 and reducing the difficulty of connecting the pin 22 with the circuit board 200.

[0099] In some embodiments, referring to Figure 11 , the connecting portion 1 includes a first connecting portion 11 and a second connecting portion 12, and the first end 211 of the main body 21 is connected with the second connecting portion 12 through the first connecting portion 11. In the mounting direction of the winding structure 10, the height difference between the second end 212 of the main body 21 and the second connecting portion 12 is greater than or equal to 0.

[0100] It can be understood that the first connecting portion 11 is located between the first end 211 of the main body 21 and the second connecting portion 12. The second end 212 of the main body 21 is spaced apart from the second connecting portion 12. In the mounting direction of the winding structure 10, the height difference between the second end 212 and the connecting portion 1 is greater than or equal to 0, specifically, the height difference between the second end 212 and the second connecting portion 12 is greater than or equal to 0.

[0101] Compared with the first connecting part 11, the second connecting part 12 is farther away from the main body 21, and by controlling the height difference between the second end 212 of the main body 21 and the second connecting part 12, the risk of interference between the connecting part 1 and the circuit board 200 is further reduced.

[0102] Since the connecting part 1 and the conductive sheet 2 are not located in the same plane, at least one of the first connecting part 11 and the second connecting part 12 is a curved extension structure.

[0103] As an example, the first connecting part 11 is a curved extension structure, the main body 21 is indirectly connected by the first connecting part 11 and the second connecting part 12, and the second connecting part 12 can be a planar extension structure or a curved extension structure.

[0104] In some embodiments, please refer to Figure 14 The pin 22 includes a first pin 221 and a second pin 222, the total number of the first pin 221 is 2, and the total number of the second pin 222 is N-1; wherein the second pin 222 is formed by connecting the adjacent two first pins 221.

[0105] The first pin 221 and the second pin 222 are different types of pins 22. Here, the first pin 221 is also called an independent pin 22, and the first pin 221 is connected to only one main body 21. The second pin 222 is also called a common pin 22, and the second pin 222 is connected to two adjacent main bodies 21 on the same conductive sheet 2 at the same time, and the second pin 222 is a pin 22 shared by the adjacent two main bodies 21. Since in the winding structure 10, one main body 21 is necessarily connected to one pin 22, the second pin 222 is equivalent to connecting the first pins 221 of the adjacent two main bodies 21. Alternatively, the second pin 222 is formed by connecting the two first pins 221 edge to edge, so that the surface area of the second pin 222 is equal to the sum of the surface areas of the two first pins 221, i.e. twice the surface area of a single first pin 221.

[0106] It can be understood that the number of first pins 221 in the winding structure 10 is 2, and the number of second pins 222 is N-1, so the total number of first pins 221 and second pins 222 (also referred to as the total number of pins) is N+1. The number of second pins 222 is related to the number N of main bodies 21 on the conductive sheet 2, so there can be no second pins 222 in the winding structure 10, there can be second pins 222, the number of second pins 222 can be less than the number of first pins 221, can be equal to the number of first pins 221, or can be more than the number of first pins 221.

[0107] As can be seen, when N is greater than or equal to 2, the number of the second pins 222 is greater than or equal to 1, the number of the pins 22 can be further reduced by setting the second pins 222, thereby reducing the number of solder joints and the installation difficulty of the winding structure 10; and the setting of the second pins 222 can also realize equipotential design to further reduce the wiring design difficulty of the circuit board 200.

[0108] As an example, please refer to Figure 6 , the number of the main bodies 21 on a single conductive sheet 2 is 1, the total number of the first pins 221 and the second pins 222 on the winding structure 10 is 2, which are both the first pins 221, and the two first pins 221 are respectively arranged on two different conductive sheets 2.

[0109] As an example, please refer to Figure 11 , the number of the main bodies 21 on a single conductive sheet 2 is 2, the total number of the first pins 221 and the second pins 222 on the winding structure 10 is 3, of which 2 first pins 221 are arranged on the same conductive sheet 2, and 1 second pin 222 is arranged on another conductive sheet 2.

[0110] As an example, please refer to Figure 14 , the number of the main bodies 21 on a single conductive sheet 2 is 3, the total number of the first pins 221 and the second pins 222 on the winding structure 10 is 4, of which 2 pins 22 are the first pins 221, and 2 pins 22 are the second pins 222, and each conductive sheet 2 is respectively provided with one first pin 221 and one second pin 222.

[0111] Similarly, when the number of the main bodies 21 on a single conductive sheet 2 is 6, the total number of the first pins 221 and the second pins 222 on the winding structure 10 is 7, of which one conductive sheet 2 is provided with 2 first pins 221 and 2 second pins 222, and another conductive sheet 2 is provided with 3 second pins 222.

[0112] Please refer to Figure 2 and Figure 6 , for the scheme shown in Figure 2 , since the conductive sheets 2 (specifically copper sheets) are arranged separately, the total number of the pins 22 required by the winding 101 composed of two conductive sheets 2 is 4N, N = 1, i.e. the total number of the pins 22 is 4; while in the present application, only N+1 pins 22 are required on the winding structure 10, N = 1, i.e. the total number of the pins 22 is 2, the number of the pins 22 is significantly reduced. Similarly, when N = 2, for the separate arrangement of the conductive sheets 2, the total number of the pins 22 is 8, while for the scheme provided in the present application, when N = 2, the total number of the pins 22 is 3, the number of the pins 22 is significantly reduced. Generally, the larger N is, the more obvious the reduction of the number of the pins 22 is for the scheme provided in the present application.

[0113] In some embodiments, referring to Figure 6 N = 1, two first pins 221 are connected with the second ends 212 of the two main bodies 21 respectively and are located on both sides of the connecting part 1; the two main bodies 21 are configured to have the same current flow direction.

[0114] That is, in the case of connecting the winding structure 10 with current, the current flow directions of the two main bodies 21 are the same.

[0115] Generally, the winding structure 10 is used in cooperation with the magnetic core 20, wherein the winding posts 202 on the magnetic core 20 are arranged on the main bodies 21, that is, the main bodies 21 are sleeved on the winding posts 202, and by controlling the current flow directions of the two main bodies 21 to be the same, it can be ensured that the winding structure 10 can effectively cooperate with the magnetic core 20.

[0116] In some embodiments, referring to Figure 10 and Figure 13 N ≥ 2, adjacent two main bodies 21 on each conductive sheet 2 are configured to have opposite current flow directions, and two main bodies 21 located opposite to each other on the two conductive sheets 2 are configured to have the same current flow direction.

[0117] That is, in the case of connecting the winding structure 10 with current, the current flow directions of adjacent two main bodies 21 in each conductive sheet 2 are opposite, and the current flow directions of two main bodies 21 located opposite to each other on different conductive sheets 2 are the same.

[0118] By the above arrangement, since N is greater than or equal to 2, that is, the number of main bodies 21 on a single conductive sheet 2 is multiple, multiple different main bodies 21 are integrally formed on the same conductive sheet 2, so that at least part of the equipotential positions of adjacent two main bodies 21 can be connected together, the risk of short circuit is reduced, in addition, the total area of the main bodies 21 on the conductive sheet 2 can be increased, that is, the amount of conductive material is increased, the conductivity is improved, and then the power of the magnetic assembly 100 is improved.

[0119] As an example, referring to Figure 10 the number of main bodies 21 on a single conductive sheet 2 is 2, as shown by the dashed line with an arrow in the figure, two different current flow paths are formed on a single conductive sheet 2.

[0120] As an example, referring to Figure 13 the number of main bodies 21 on a single conductive sheet 2 is 3, and three different current flow paths are formed on a single conductive sheet 2.

[0121] In some embodiments, referring to Figure 12 and Figure 15The second pin 222 is arranged between the first pins 221, and adjacent first pins 221 and second pins 222 are respectively located on two conductive sheets 2, and adjacent second pins 222 are also respectively located on two conductive sheets 2.

[0122] It can be foreseen that when the number N of the main bodies 21 on the conductive sheet 2 is even, two first pins 221 are located on the same conductive sheet 2, so that the total number of the pins 22 is odd. In this case, the number of the pins 22 on the conductive sheet 2 with two first pins 221 is one more than the number of the pins 22 on the other conductive sheet 2. When N is odd, two first pins 221 are respectively located on different conductive sheets 2, so that the total number of the pins 22 is even. In this case, the number of the pins 22 on the two conductive sheets 2 is equal.

[0123] In some embodiments, please refer to FIG. 6 and Figure 7 、 Figure 11 and Figure 12 、 Figure 14 and Figure 15 The main body 21 is provided with a mounting hole 213, and the mounting holes 213 of the two main bodies 21 located opposite to each other correspond to each other and jointly form an accommodation channel 4. The main body 21 is also provided with a gap 214, and the mounting hole 213 and the gap 214 are in communication. The pin 22 and the connecting part 1 are respectively located on the two sides of the gap 214.

[0124] The main body 21 is also provided with a mounting hole 213, and the mounting holes 213 of the two main bodies 21 located opposite to each other correspond to each other and jointly form an accommodation channel 4. The accommodation channel 4 is used for allowing the winding column 202 of the magnetic core 20 to pass through, so that the winding structure 10 is sleeved on the winding column 202 of the magnetic core 20.

[0125] It can be understood that the winding column 202 of the magnetic core 20 passes through the mounting hole 213. The shape of the mounting hole 213 can be set according to the cross-sectional shape of the winding column 202, so that the winding column 202 can be matched with the mounting hole 213. As an example, the shape of the mounting hole 213 can be one of a circle, an ellipse, a track, a square and a rectangle. It should be noted that one mounting hole 213 is provided on one main body 21, but a plurality of main bodies 21 can be arranged on one conductive sheet 2. In this way, the number of the mounting holes 213 on one conductive sheet 2 can be one or more. When the number of the mounting holes 213 on one conductive sheet 2 is more than one, the different mounting holes 213 are arranged at intervals, so that a plurality of accommodation channels 4 can be obtained. Thus, the winding structure 10 can be assembled with the magnetic core 20 having a plurality of winding columns 202, so as to improve the power density of the magnetic assembly 100 prepared.

[0126] For the purpose of more clearly illustrating the formation of the accommodation channel 4, the mounting hole 213 on the first conductive sheet can be referred to as a first mounting hole 213, and the mounting hole 213 on the second conductive sheet can be referred to as a second mounting hole 213. When the first conductive sheet and the second conductive sheet are arranged opposite to each other, the first mounting hole 213 corresponds to the second mounting hole 213 one by one.

[0127] In order to realize the one-to-one arrangement of the mounting holes 213 on the two conductive sheets 2, the mounting holes 213 on one conductive sheet 2 can be equal in number to the mounting holes 213 on the other conductive sheet 2 and correspond to each other in position. However, the shapes of the mounting holes 213 on the two conductive sheets 2 can be the same or different, and similarly, the areas of the mounting holes 213 on the two conductive sheets 2 can be equal or different. When the shapes of the mounting holes 213 on the two conductive sheets 2 are the same and the areas of the mounting holes 213 on the two conductive sheets 2 are equal, the obtained accommodation channel 4 can be a straight channel. When the shapes of the mounting holes 213 on the two conductive sheets 2 are the same but the areas of the mounting holes 213 on the two conductive sheets 2 are different, the obtained accommodation channel 4 can be a tapered channel.

[0128] For example, two first mounting holes 213 are formed on the first conductive sheet, and two second mounting holes 213 are formed on the second conductive sheet. One first mounting hole 213 on the first conductive sheet corresponds to one first mounting hole 213 on the second conductive sheet and defines one accommodation channel 4. The other first mounting hole 213 on the first conductive sheet corresponds to the other first mounting hole 213 on the second conductive sheet and defines another accommodation channel 4.

[0129] The gap 214 is further formed on the main body 21 and connects the mounting hole 213 with the outside, where the outside refers to the environment outside the conductive sheet 2. The pin 22 and the connecting part 1 are located on two sides of the gap 214, that is, the gap 214 also separates the pin 22 and the connecting part 1. For example, the pin 22 and the connecting part 1 are arranged apart on the main body 21, and the pin 22 and the connecting part 1 define a first sub-gap. The main body 21 is further hollowed to form a second sub-gap. The first sub-gap and the second sub-gap are connected, and the second sub-gap is further connected with the mounting hole 213. That is, the gap 214 includes the first sub-gap and the second sub-gap, and the mounting hole 213 can be connected with the outside through the gap 214.

[0130] The gap 214 can prevent the pin 22 from being directly connected with the connecting part 1, so as to avoid the direct flow of current between the pin 22 and the connecting part 1.

[0131] In some embodiments, please refer to 6 and Figure 7 、 Figure 11 and Figure 12 、 Figure 14 and Figure 15The connecting portion 1 and the two oppositely arranged conductive sheets 2 are integrally formed by stamping and bending.

[0132] Specifically, the conductive sheet is punched by stamping to obtain the unfolded winding structure 10, and then the winding structure 10 in the unfolded state is bent to obtain the winding structure 10 in the folded state. At this time, the winding structure 10 in the folded state can be directly used as the first winding 101.

[0133] The winding structure 10 obtained in this way has high strength, so that the winding structure 10 also serves as a skeleton, thereby omitting the skeleton when the winding structure 10 is applied to the magnetic assembly 100, which is helpful to improve the power density of the magnetic assembly 100 and improve the heat dissipation performance of the magnetic assembly 100. In addition, the stamping and bending integrated process is simple, which is conducive to improving the manufacturing feasibility of the winding structure 10.

[0134] In some embodiments, referring to Figure 19 The pin 22 is provided with a heat collecting hole 223 and / or a heat collecting groove.

[0135] The slotting and hole digging will reduce the conductive material on the pin 22, and the conductive material usually also has thermal conductivity, so that the heat dissipation capacity of the pin 22 is poor, so that heat is easily accumulated on the pin 22, so that welding is more easily achieved, thereby improving the effect of welding the pin 22 and the circuit board 200.

[0136] In the second aspect, referring to Figures 16 to 23 The application also provides a magnetic assembly 100, which comprises a winding 101 and two oppositely arranged magnetic cores 20. The winding 101 comprises a first winding 1011 and a second winding 1012. The first winding 1011 is the winding structure 10 described above, and the second winding 1012 is located in the accommodation space 3. The magnetic core 20 comprises a cover plate 201, a winding column 202 and a common column 203. One end of the winding column 202 and the common column 203 is connected with the cover plate 201. The winding column 202 is arranged in the accommodation channel 4. The accommodation channel 4 is formed by the installation through hole 213 of the two main bodies 21 which are oppositely arranged on the two conductive sheets 2. The installation through hole 213, the accommodation channel 4 and the winding column 202 are correspondingly arranged. The number of the winding column 202 is N, and the number of the common column 203 is greater than or equal to 0.

[0137] The winding 101 is a circuit part in the magnetic assembly 100, and the winding 101 includes a first winding 1011 and a second winding 1012, and the first winding 1011 cooperates with the second winding 1012. Generally, one of the first winding 1011 and the second winding 1012 is a primary winding, and the other of the first winding 1011 and the second winding 1012 is a secondary winding. Taking the magnetic assembly 100 as a transformer as an example, if the transformer is used to realize voltage boosting, that is, the transformer is suitable for a low-voltage-high-voltage application scenario, the first winding 1011 can be designed as a primary winding, and the second winding 1012 is a secondary winding; if the transformer is used to realize voltage reduction, that is, the transformer is suitable for a high-voltage-low-voltage application scenario, the first winding 1011 can be designed as a secondary winding, and the second winding 1012 is a primary winding.

[0138] The magnetic core 20 is a magnetic circuit part of the magnetic assembly 100. The number of the magnetic core 20 is two, and the two magnetic cores 20 are oppositely arranged, so as to form a closed magnetic circuit.

[0139] Specifically, the magnetic core 20 includes a cover plate 201, a winding column 202, and a common column 203, one end of the winding column 202 and the common column 203 is connected with the cover plate 201, wherein the number of the winding column 202 is N, and the number of the common column 203 is greater than or equal to 0.

[0140] Since the mounting through hole 213, the accommodating channel 4 and the winding column 202 are correspondingly arranged, the winding column 202 is arranged in the accommodating channel 4, and the main body 21 is sleeved on the winding column 202, so that the number of the winding column 202 in the magnetic core 20 is equal to the number of the accommodating channel 4 in the winding structure 10, and the number of the accommodating channel 4 is equal to the number N of the main body 21 on the single conductive sheet 2, so that the number of the winding column 202 is N.

[0141] As an example, when the number of the accommodating channel 4 is one, only one winding column 202 can be arranged on the cover plate 201; when the number of the accommodating channel 4 is multiple, multiple winding columns 202 can be arranged on the cover plate 201. When the number of the accommodating channel 4 is multiple, the number of the winding column 202 is multiple, and the winding column 202 is arranged one by one with the accommodating channel 4, and the different winding columns 202 are spaced from each other, so that a receiving space can be left for the winding structure 10, which facilitates the assembly of the winding structure 10.

[0142] The number of the common column 203 is greater than or equal to 0, that is, the magnetic core 20 can include the common column 203 or can not include the common column 203.

[0143] Optionally, the magnetic core 20 comprises a plurality of common columns 203 arranged at intervals, the common columns 203 are arranged on the cover plate 201 and are spaced apart from the winding columns 202, wherein the common columns 203 are close to the edge region of the cover plate 201, and the winding columns 202 are close to the middle region of the cover plate 201. By increasing the plurality of common columns 203, the number of closed magnetic circuits can be further increased, and the design type of the magnetic assembly 100 can be enriched. In addition, the winding columns 202 are close to the middle region of the cover plate 201, which facilitates the cooperation of the winding columns 202 with the accommodation channel 4, and the common columns 203 are close to the edge region of the cover plate 201, so that the winding structure 10 is located on the inner side of the common column 203, and the common column 203 can also limit or protect the winding structure 10.

[0144] As an example, please refer to Figure 21 , the cover plate 201 is provided with two winding columns 202 and four common columns 203 at intervals, so that at least five closed magnetic circuits can be formed when the two magnetic cores 20 are arranged opposite to each other.

[0145] According to the second aspect of the present application, the magnetic assembly 100 comprises the winding structure 10 described above, and the magnetic assembly 100 has all the beneficial effects of the winding structure 10 described above, which will not be repeated here.

[0146] In some embodiments, please refer to Figure 16 , the first winding 1011 is a primary winding, and the second winding 1012 is a secondary winding, and the secondary winding is a wire cake structure; or, the first winding 1011 is a secondary winding, and the second winding 1012 is a primary winding, and the primary winding is a wire cake structure.

[0147] By setting the second winding 1012 as a wire cake structure, the number of turns of the coil can be increased by increasing the number of windings. As an example, the wire cake structure comprises a plurality of twisted wires, or a plurality of twisted wires with an insulating layer.

[0148] In some embodiments, please refer to Figure 22 , along the thickness direction of the cover plate 201, the sidewall of the cover plate 201 is provided with a heat dissipation groove 2011 penetrating through the cover plate 201.

[0149] Generally, due to the weak magnetic field strength of the edge region of the cover plate 201, by making the sidewall of the cover plate 201 concave to form the heat dissipation groove 2011, on the one hand, the weight of the cover plate 201 can be reduced, and on the other hand, the heat dissipation groove 2011 penetrates through the cover plate 201, so that the heat dissipation groove 2011 can also promote the heat dissipation of the magnetic assembly 100.

[0150] The number of heat dissipation grooves 2011 on the cover plate 201 can be one or more.

[0151] In some embodiments, please refer to Figure 23At least part of the position of the heat dissipation groove 2011 corresponds to the position of the connecting part 1 in the winding structure 10. The connecting part 1 is used for conducting current, and the connecting part 1 is generally relatively narrow, which causes the connecting part 1 to easily generate heat. By setting the position of the heat dissipation groove 2011 to correspond to the connecting part 1, the connecting part 1 is facilitated to dissipate heat.

[0152] In some embodiments, referring to Figure 16 and Figure 20 The magnetic assembly 100 includes a plurality of winding structures 10 arranged in a stack. That is, the number of winding structures 10 in the magnetic assembly 100 is a plurality, and by increasing the number of winding structures 10 and arranging all the winding structures 10 in a stack between the two magnetic cores 20, the energy density of the magnetic assembly 100 can be further improved.

[0153] As an example, referring to Figure 16 The magnetic assembly 100 includes three winding structures 10 arranged in a stack, so that the magnetic field strength H in the magnetic assembly 100 undergoes three cycles, always maintains a low magnetic field strength, and the loss of the magnetic assembly 100 is also low.

[0154] It should be emphasized here that the number of magnetic assemblies 100 can be set according to the actual power requirement, so that the magnetic assembly 100 is more flexible to adapt to different power applications.

[0155] In some embodiments, referring to Figure 22 and Figure 23 The pins 22 of the winding structures 10 protrude from the edge of the cover plate 201, and the edge of the main body 21 does not exceed the edge of the cover plate 201.

[0156] The advantage of this arrangement is that not only is it convenient for the pins 22 to be connected to the circuit board 200, but also the circuit part and the magnetic circuit part of the magnetic assembly 100 can be better matched, and the cover plate 201 can also protect the main body 21.

[0157] In some embodiments, referring to Figure 22 The cover plate 201 has opposite first and second side edges, the pins 22 of all the winding structures 10 protrude from the first side edge, the number of circuit boards 200 is one, and the circuit board 200 is arranged close to the first side edge. In this way, the pins 22 of all the winding structures 10 are connected to the same circuit board 200, and the structure of the magnetic assembly 100 is more compact.

[0158] In some embodiments, referring to Figure 23The cover plate 201 has opposite first and second side edges, one portion of the pins 22 of the winding structure 10 protrude from the first side edge, and another portion of the pins 22 of the winding structure 10 protrude from the second side edge. The number of the circuit boards 200 is two, one of which is arranged close to the first side edge, and the other of which is arranged close to the second side edge. This arrangement has the advantage of facilitating the connection of the pins 22 to the circuit boards 200, and the wiring inside a single circuit board 200 is also simpler.

[0159] In some embodiments, the magnetic assembly 100 includes at least one of a transformer and an inductor.

[0160] In a third aspect, referring to Figures 24 to 26 The application also provides a power supply 1000, which includes the circuit board 200 and the magnetic assembly 100 as described above, and the magnetic assembly 100 is connected to the circuit board 200 through the pins 22.

[0161] Referring to Figure 17 and Figure 24 The pins 22 are connected to the circuit board 200, so that the conduction of the circuit in the winding structure 10 can be controlled through the circuit board 200.

[0162] In some embodiments, referring to Figure 24 The circuit board 200 includes a first circuit board 2001, and the magnetic assembly 100 is arranged on the first circuit board 2001. The pins 22 of the magnetic assembly 100 all face the first circuit board 2001 and are connected to the first circuit board 2001. As an example, all the pins 22 of the winding structure 10 protrude from the same side of the cover plate 201, and the pins 22 are plugged into the first circuit board 2001.

[0163] In some embodiments, referring to Figure 25 and Figure 26 The circuit board 200 includes a first circuit board 2001 and a second circuit board 2002, and the second circuit board 2002 is arranged perpendicularly on the first circuit board 2001 and is electrically connected to the first circuit board 2001. The magnetic assembly 100 is arranged on the first circuit board 2001, and the side edge of the magnetic assembly 100 is close to the second circuit board 2002. Specifically, the magnetic assembly 100 includes the magnetic core 20, the cover plate 201 of the magnetic core 20 is supported on the first circuit board 2001, the second circuit board 2002 is close to the common column 203 of the magnetic core 20 and the side edge of the cover plate 201, and the pins 22 of the winding structure 10 protrude from the cover plate 201 and are connected to the second circuit board 2002. As an example, the first circuit board 2001 is a main circuit board, and the second circuit board 2002 is a sub-circuit board or a synchronous rectification board.

[0164] In some embodiments, referring to Figure 25The number of the second circuit board 2002 is one, and all the pins 22 of the winding structure 10 protrude from the same side of the cover plate 201 and are connected with the second circuit board 2002.

[0165] In some embodiments, referring to Figure 26 The number of the second circuit board 2002 is two, and the two second circuit boards 2002 are arranged on opposite sides of the magnetic assembly 100. On the magnetic assembly 100, a part of the pins 22 of the winding structure 10 protrude from one side edge of the cover plate 201 and are connected with one of the second circuit boards 2002, and another part of the pins 22 of the winding structure 10 protrude from the other side edge of the cover plate 201 and are connected with the other second circuit board 2002.

[0166] According to a third aspect of the present application, the power supply 1000 comprises the above-mentioned magnetic assembly 100, and the power supply 1000 has all the beneficial effects of the magnetic assembly 100, which will not be repeated here.

[0167] In some embodiments, the switching power supply 1000 comprises a charger. As an example, the charger is a vehicle charger.

[0168] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0169] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0170] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0171] The above is only the preferred embodiments of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A winding structure, characterized by, The winding structure comprises a connecting part and two oppositely arranged conductive sheets, the conductive sheet comprises a main body and a pin, the main body comprises a first end and a second end, the first end is connected with the connecting part, the second end is connected with the pin, and a containing space is defined between the connecting part and the opposite main body; Wherein, the height difference between the second end and the connecting part is greater than or equal to 0 along the installation direction of the winding structure, the total number of the connecting part is equal to the total number of the main body on each conductive sheet, and both are N, N is a positive integer.

2. The winding structure of claim 1, wherein, The connecting part comprises a first connecting part and a second connecting part, the first end of the main body is connected with the second connecting part through the first connecting part; the height difference between the second end of the main body and the second connecting part is greater than or equal to 0 along the installation direction of the winding structure.

3. The winding structure according to any of claims 1-2, characterized in that, The pin comprises a first pin and a second pin, the total number of the first pin is 2, and the total number of the second pin is N-1; wherein, the second pin is formed by connecting two adjacent first pins.

4. The winding structure of claim 3, wherein, N=1, two first pins are respectively connected with the second ends of two main bodies and are located on both sides of the connecting part; two main bodies are configured to have the same current flow direction.

5. The winding structure of claim 3, wherein, N≥2, adjacent two main bodies on each conductive sheet are configured to have opposite current flow directions, and positionally opposite two main bodies on two conductive sheets are configured to have the same current flow direction.

6. The winding structure of claim 5, wherein, The second pin is arranged between the first pins, and adjacent first pins and second pins are respectively located on two conductive sheets, and adjacent two second pins are also respectively located on two conductive sheets.

7. The winding structure according to any of claims 4-6, characterized in that, The main body is provided with a mounting through hole, and positionally opposite two mounting through holes of the main body correspond in position and jointly form a containing channel; the main body is also provided with a gap, the mounting through hole and the gap are in communication, and the pin and the connecting part are respectively located on both sides of the gap.

8. The winding structure of claim 7, wherein, The connecting part and the two oppositely arranged conductive sheets are integrally formed by stamping and bending.

9. The winding structure of claim 8, wherein, The pin is provided with a heat collecting hole and / or a heat collecting groove.

10. A magnetic assembly, characterized by The magnetic assembly comprises a winding and two oppositely arranged magnetic cores, The winding comprises a first winding and a second winding, the first winding is the winding structure of any one of claims 1-9, and the second winding is located in the containing space; The magnetic core comprises a cover plate, a winding column and a common column, one end of the winding column and the common column is connected with the cover plate, the winding column is arranged in the containing channel, the containing channel is formed by the mounting through holes of positionally opposite two main bodies on two conductive sheets, and the mounting through hole, the containing channel and the winding column correspond in position; wherein, the number of the winding column is N, and the number of the common column is greater than or equal to 0.

11. The magnetic assembly of claim 10, wherein, The first winding is a primary winding, the second winding is a secondary winding, and the secondary winding is a line cake structure; or, the first winding is a secondary winding, the second winding is a primary winding, and the primary winding is a line cake structure.

12. The magnetic assembly of claim 11, wherein, The side wall of the cover plate is provided with a heat dissipation groove penetrating the cover plate along the thickness direction of the cover plate.

13. A power supply, characterized by, The magnetic assembly of any one of claims 11-12 is in conduction with the circuit board through the pin.

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