Three-phase five-column transformer and circuit device

Abstract

The utility model discloses a three-phase five-column transformer and a circuit device. The three-phase five-column transformer comprises a first magnetic core structure and a second magnetic core structure, wherein the first magnetic core structure and the second magnetic core structure are the same in structure; wherein each magnetic core structure comprises a magnet yoke, two side columns and three middle columns which are integrally formed; the distance between each side column and the nearest middle column is half of the distance between the two adjacent middle columns; the first winding coils are respectively arranged on three middle columns of the first magnetic core; the three first winding coils are electrically connected in a triangular manner; the second winding coils are respectively arranged on three middle columns of the second magnetic core; and the three second winding coils are electrically connected in a triangular manner. The transformer is more compact in structure, the utilization rate of the magnetic core is increased to a certain extent, miniaturization development of the transformer is facilitated, and the stability of the magnetic core structure in the transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit equipment, in particular to a three-phase five-column transformer and a circuit device. Background Art

[0002] The three-phase five-column transformer has five core columns, which are connected to each other with iron yokes at the top and bottom. The three middle core columns have coils forming three-phase windings, and the two side core columns serve as magnetic circuits. The zero-sequence magnetic flux forms a circulation loop through the two outer core columns and the upper and lower iron yokes. The zero-sequence impedance of the three-phase five-column transformer is very small, which can greatly reduce the zero-sequence loss. It is widely used in large and medium-sized enterprises and has various protection functions such as low voltage, overvoltage protection, and low voltage start-up.

[0003] With the miniaturization of various electronic and electrical equipment, in order to better adapt to various installation and use environments, the miniaturization of three-phase five-column transformers has gradually become one of their development directions. Utility Model Content

[0004] The purpose of the utility model is to provide a three-phase five-column transformer and circuit device, which can improve the compactness of the transformer structure to a certain extent, improve the utilization rate of the magnetic core to a certain extent, be beneficial to the miniaturization development of the transformer, and improve the stability of the magnetic core structure in the transformer.

[0005] In order to solve the above technical problems, the utility model provides a three-phase five-column transformer, comprising:

[0006] Two magnetic core structures of the first magnetic core and the second magnetic core with the same structure; wherein each of the magnetic core structures comprises a yoke, two side columns arranged at both ends of the yoke, and three middle columns arranged in sequence between the two side columns; the yoke, the side columns and the middle column in each of the magnetic core structures are integrally formed; and the distance between each of the side columns and the nearest middle column is half the distance between two adjacent middle columns; the ends of the two side columns of the first magnetic core facing away from the yoke are respectively fitted and connected with the ends of the two side columns of the second magnetic core facing away from the yoke, and the ends of the three middle columns of the first magnetic core facing away from the yoke are respectively fitted and connected with the ends of the three middle columns of the second magnetic core facing away from the yoke in a one-to-one correspondence;

[0007] The first winding coils are respectively arranged on the three middle columns of the first magnetic core; and the three first winding coils are electrically connected in a triangle;

[0008] The second winding coils are respectively arranged on the three middle columns of the second magnetic core; and the three second winding coils are electrically connected in a triangle.

[0009] In an optional embodiment of the present application, it further includes a plurality of conductive metal pillars arranged in sequence along the arrangement direction of the three first winding coils on one side of the magnetic core structure;

[0010] The two connection terminals of each first winding coil are respectively electrically connected to the two conductive metal pillars that are closest to each other; and the three first winding coils are electrically connected in a triangle shape through the conductive metal pillars.

[0011] In an optional embodiment of the present application, the conductive metal pillar includes two first conductive metal pillars located at the outermost sides and four second conductive metal pillars arranged in sequence between the two first conductive metal pillars;

[0012] Wherein, the two wiring ends of the two first winding coils located at the outer positions are connected to the first conductive metal pillar and the second conductive metal pillar that are closest to each other; the two wiring ends of the first winding coil located at the middle position are respectively connected to the two second conductive metal pillars located at the middle position;

[0013] The two outermost second conductive metal pillars in each of the second conductive metal pillars are electrically connected to the second conductive metal pillar closest to them; the two first conductive metal pillars are electrically connected via a conductive metal rod disposed between each of the conductive metal pillars and the magnetic core structure; the conductive metal rods and the terminals of each of the first winding coils extending to each of the conductive metal pillars are staggered.

[0014] In an optional embodiment of the present application, the conductive metal pillars include two first conductive metal pillars located at the outermost sides and two second conductive metal pillars arranged in sequence between the two first conductive metal pillars;

[0015] The two terminals of the two first winding coils at the outer positions are connected to the first conductive metal pillar and the second conductive metal pillar that are closest to each other; the two terminals of the first winding coil at the middle position are connected to the two second conductive metal pillars respectively;

[0016] The two first conductive metal pillars are electrically connected via a conductive metal rod disposed between each of the conductive metal pillars and the magnetic core structure; the conductive metal rod and the terminal of each of the first winding coils extending to each of the conductive metal pillars are disposed in staggered layers.

[0017] In an optional embodiment of the present application, the first conductive metal column includes a main column and an extension portion extending toward one side of the magnetic core structure, and the main column and the extension portion form an L-shaped structure;

[0018] Both ends of the conductive metal rod are mounted on the extension parts of the two first conductive metal pillars.

[0019] In an optional embodiment of the present application, the connection terminal of each of the first winding coils is a ring-shaped connection terminal, and the ring-shaped connection terminal is sleeve-connected to the conductive metal column.

[0020] In an optional embodiment of the present application, the first winding coil includes a plurality of conductive sheets stacked in sequence; the second winding coil includes a film-wrapped wire wound on the middle column of the second magnetic core; and an insulating film sheet is arranged between adjacent first winding coils and second winding coils.

[0021] In an optional embodiment of the present application, both side ends of each of the center columns are arc ends.

[0022] In an optional embodiment of the present application, the connection terminals of each of the second winding coils and the connection terminals of the first winding coils are respectively located on opposite sides of the magnetic core structure; and the connection terminals of each of the second winding coils are M4 terminals.

[0023] A circuit device, comprising a circuit board and a three-phase five-column transformer as described in any one of the above items;

[0024] Wherein, the three-phase five-column transformer is arranged on the circuit board in contact with an aluminum substrate.

[0025] The utility model provides a three-phase five-column transformer and a circuit device, the three-phase five-column transformer comprising: two magnetic core structures of the same structure, a first magnetic core and a second magnetic core; wherein each magnetic core structure comprises a yoke, two side columns arranged at both ends of the yoke, and three middle columns arranged in sequence between the two side columns; the yoke, the side columns and the middle column in each magnetic core structure are integrally formed; and the spacing between each side column and the nearest middle column is half the spacing between two adjacent middle columns; the ends of the two side columns of the first magnetic core away from the yoke are respectively fitted and connected with the ends of the two side columns of the second magnetic core away from the yoke, and the ends of the three middle columns of the first magnetic core away from the yoke are respectively fitted and connected with the ends of the three middle columns of the second magnetic core away from the yoke in a one-to-one correspondence; first winding coils are respectively arranged on the three middle columns of the first magnetic core; and the three first winding coils are electrically connected in a triangular shape; second winding coils are respectively arranged on the three middle columns of the second magnetic core; and the three second winding coils are electrically connected in a triangular shape.

[0026] In order to reduce the volume of the three-phase five-column transformer as much as possible in the present application, the spacing between the side column and the nearest side column in the core structure is set to half the spacing between the two adjacent middle columns, that is, the gap between the winding coils on the two middle columns closest to the side columns and the side columns is reduced, thereby reducing the size of the three-phase five-column transformer along the arrangement direction of each middle column to a certain extent, and improving the utilization rate of the core; on this basis, the yokes in the two core structures are integrally formed with the side columns and the middle column, thereby improving the stability of the core structure to a certain extent and reducing the difficulty of the entire transformer assembly process. It can be seen that the transformer structure in the present application is more compact, which improves the utilization rate of the core to a certain extent, is conducive to the miniaturization of the transformer, and improves the stability of the core structure in the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the structure of half of the magnetic core in a conventional three-phase five-column transformer;

[0029] Figure 2 A schematic diagram of the structure of a three-phase five-column transformer provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of a magnetic core structure provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of a three-phase five-column transformer provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the structure of a conductive sheet provided in an embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of a first winding coil and a first magnetic core provided in an embodiment of the present application;

[0034] Figure 7 A schematic diagram of the structure of a second conductive metal column provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of a first conductive metal column provided in an embodiment of the present application;

[0036] In the accompanying drawings: 100 is an E-type magnetic core, 1 is a magnetic core structure, 101 is a middle column, 102 is a side column, 103 is a yoke, 11 is a first magnetic core, 12 is a second magnetic core, 21 is a first winding coil, 211 is a conductive sheet, 22 is a second winding coil, 3 is a conductive metal column, 31 is a first conductive metal column, 311 is a main column, 312 is an extension portion, 32 is a second conductive metal column, and 4 is a conductive metal rod. DETAILED DESCRIPTION

[0037] like Figure 1 As shown, in a conventional three-phase five-column transformer, two E-type magnetic cores 100 are arranged in accordance with Figure 1 The method shown in the figure is to connect the two halves of the transformer core. Figure 1 The two magnetic cores shown in the figure form a complete magnetic core structure with five columns and four windows by means of the mutual attachment of the columns; the spacing between two adjacent columns on each E-type magnetic core 100 is the same, that is, the size of the four windows of the five columns is the same; and winding coils are arranged on the three middle columns, and there is a gap between the two outermost columns and the adjacent winding coils, which reduces the compactness of the structure of the entire transformer. In addition, according to Figure 1 The magnetic core structure spliced ​​and connected in the manner shown also has the problem of insufficient structural stability.

[0038] To this end, the present application provides a three-phase five-column transformer, which can improve the compactness of the transformer structure to a certain extent, and enhance the structural stability of the magnetic core in the transformer, thereby improving the working performance of the transformer to a certain extent.

[0039] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0040] like Figures 2 to 8 As shown, Figure 2 A schematic diagram of the structure of a three-phase five-column transformer provided in an embodiment of the present application; Figure 3 A schematic diagram of a magnetic core structure provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a three-phase five-column transformer provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a conductive sheet provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a first winding coil and a first magnetic core provided in an embodiment of the present application; Figure 7A schematic diagram of the structure of a second conductive metal column provided in an embodiment of the present application; Figure 8 A schematic structural diagram of a first conductive metal column provided in an embodiment of the present application.

[0041] In a specific embodiment of the present application, the three-phase five-column transformer may include:

[0042] Two magnetic core structures 1, a first magnetic core 11 and a second magnetic core 12 having the same structure;

[0043] Each magnetic core structure 1 includes a yoke 103, two side columns 102 arranged at both ends of the yoke 103, and three middle columns 101 arranged in sequence between the two side columns 102; the yoke 103, the side columns 102 and the middle column 101 in each magnetic core structure 1 are integrally formed; and the distance between each side column 102 and the nearest middle column 101 is half the distance between two adjacent middle columns 101; the ends of the two side columns 102 of the first magnetic core 11 away from the yoke 103 are respectively fitted and connected with the ends of the two side columns 102 of the second magnetic core 12 away from the yoke 103, and the ends of the three middle columns 101 of the first magnetic core 11 away from the yoke 103 are respectively fitted and connected with the ends of the three middle columns 101 of the second magnetic core 12 away from the yoke 103 in a one-to-one correspondence;

[0044] The first winding coils 21 are respectively arranged on the three middle columns 101 of the first magnetic core 11; and the three first winding coils 21 are electrically connected in a triangle;

[0045] The second winding coils 22 are respectively arranged on the three middle poles 101 of the second magnetic core 12 ; and the three second winding coils 22 are electrically connected in a triangle shape.

[0046] like Figure 2 and Figure 3 As shown, the three-phase five-column transformer of this embodiment includes two core structures 1, and the yoke 103, the side column 102 and the middle column 101 in each core structure 1 are integrally formed, so that each core structure 1 has better structural strength and stability; in actual applications, each core structure 1 is a ferrite core.

[0047] In addition, the first winding coil 21 and the second winding coil 22 are respectively wound on the three middle columns 101 on the first magnetic core 11 and the second magnetic core 12 in this embodiment; obviously, the three first winding coils 21 and the three second winding coils 22 are respectively the primary coil and the secondary coil in the transformer. The three first winding coils 21 are electrically connected in a triangle, so that the three first winding coils 21 form a three-phase winding coil, and similarly, the three second winding coils 22 are also three-phase winding coils.

[0048] On this basis, the distance between the side column 102 and the nearest middle column 101 in the first magnetic core 11 and the second magnetic core 12 in this embodiment is equal to half of the distance between adjacent middle columns 101; Figure 2 As shown, in Figure 4 The three middle columns 101 of the first magnetic core 11 are respectively provided with the first winding coil 21. Obviously, two coils of the first winding coil 21 are accommodated between two connected middle columns 101, while only one first winding coil 21 is accommodated between the side column 1 and the nearest middle column 101. Therefore, in this embodiment, the distance between the side column 102 and the nearest middle column 101 is set to be equal to half of the distance between adjacent middle columns 101, that is, whether it is the first winding coil 21 or the second winding coil 22, the distance between the winding coils on both sides and the side column 102 can be greatly reduced, thereby ensuring a compact connection between the winding coil and the magnetic core structure 1, improving the utilization rate of the magnetic core, and reducing the size of the entire three-phase five-column transformer.

[0049] In addition, for the first winding coil 21 and the second winding coil 22 in the present application, two winding coils with different structures can be used. Figure 5 and Figure 6 As shown, in an optional embodiment of the present application, in the three-phase five-column transformer, the first winding coil 21 may include a plurality of conductive sheets 211 stacked in sequence, and the second winding coil 22 includes a film-wrapped wire wound on the middle column 101 of the second magnetic core 12; and an insulating film sheet is arranged between the first winding coil 21 and the second winding coil 22.

[0050] In this embodiment, the first winding coil 21 is a layered coil with good mechanical strength and is not easy to deform; it has good electrical strength, uniform impact gradient voltage distribution, and stronger short-circuit bearing capacity; the second winding coil 22 is formed by winding a single wire, which is easy to wind.

[0051] In order to ensure the heat dissipation performance between each winding coil, a gap is left between each adjacent first winding coil 21, between each adjacent second winding coil 22, and between adjacent first winding coil 21 and second winding coil 22; the size of the gap can be set based on the specific needs of the coil winding in the transformer, and there is no specific restriction on this in this embodiment. In addition, in order to ensure the insulation between the first winding coil 21 and the second winding coil 22, an insulating film sheet is also provided between the adjacent first winding coil 21 and the second winding coil 22. The insulating film sheet can adopt a film structure with good heat dissipation performance, so that the insulating film sheet can be arranged in contact with the outermost conductive sheet 211 of the first winding coil 21, and a gap is left between the second winding coil. In practical applications, the thickness of the insulating film sheet can also be selected based on the different currents passed through the first winding coil 21 and the second winding coil 22, and there is no specific restriction on this in this embodiment.

[0052] In addition, if Figure 3 As shown, in order to ensure good fit between the first winding coil 21 and the second winding coil 22 and the middle column 101 where they are located, the two side ends of each middle column 101 in this embodiment can be arc ends; that is, the magnetic core structure 1 in this embodiment is roughly an EQ magnetic core with three middle columns 101.

[0053] As described above, the three first winding coils 21 and the three second winding coils 22 need to be electrically connected in a triangle, and the transformer usually needs to be set on a circuit board in practical applications; therefore, in order to achieve this electrical connection structure, it is often necessary to lay out a relatively complex and messy circuit structure on the circuit board, so that the entire transformer occupies a larger area on the circuit board. In another optional embodiment of the present application, the three-phase five-column transformer further includes:

[0054] A plurality of conductive metal pillars 3 are sequentially arranged on one side of the magnetic core structure 1 along the direction in which the three first winding coils 21 are arranged;

[0055] The two connection terminals of each first winding coil 21 are respectively electrically connected to the two closest conductive metal pillars 3 ; the three first winding coils 21 are electrically connected in a triangle through the conductive metal pillars 3 .

[0056] like Figure 1 Shown and Figure 2 As shown, in this embodiment, a plurality of conductive metal pillars 3 are sequentially arranged on one side of the magnetic core structure 1; the conductive metal pillars 3 can specifically be metal copper pillars or other metal pillar structures with good conductive properties, which are not specifically limited in this embodiment.

[0057] In this embodiment, the conductive metal column 3 is electrically connected to the terminal of the first winding coil 21. Compared with the conventional welding connection using a wire and a terminal, the connection structure between the conductive metal column 3 and the first winding coil 21 in this embodiment is more secure. In order to achieve electrical connection between each first winding coil 21, each conductive metal column 3 also needs to be electrically connected accordingly, and the electrical connection between each conductive metal column 3 can be achieved by welding with the conductive line on the circuit board, without the need to arrange complex and messy conductive wires to achieve electrical connection between each winding coil.

[0058] In addition, if Figure 5 and Figure 6 As shown, in order to reduce the difficulty of connecting each first winding coil 21 and each conductive metal column 3, in practical applications, the terminal of the first winding coil 21 can be set as a ring terminal, and accordingly, each ring terminal can be directly sleeved and connected to the conductive metal column 3.

[0059] like Figure 7 As shown, the conductive metal column 3 in this embodiment can be a columnar structure with a thin upper end and a thick lower end, so that the annular terminal of each first winding coil 21 can be sleeved on the upper half section of the conductive metal column 3 and supported by the lower half section to prevent the annular terminal from sliding down.

[0060] In addition, as described above, the first winding coil 21 in the present application is formed by stacking a plurality of conductive sheets 211. Obviously, each conductive sheet 211 needs to lead out a terminal that can be electrically connected to the conductive metal column 3. Therefore, in this embodiment, the two terminals of each conductive sheet 211 can be set as annular terminals. After stacking the conductive sheets 211 in sequence, the annular terminals corresponding to the conductive sheets 211 are obviously stacked in sequence to form a columnar tube structure. This columnar tube structure is directly sleeved on the upper half of the conductive metal column 3, that is, the electrical connection between all the conductive sheets 211 and the conductive metal column 3 in the first winding coil 21 is realized. It can be seen that in this embodiment, the conductive metal column 3 and the first winding coil 21 are electrically connected through the annular terminals, which can greatly reduce the difficulty of electrical connection between the terminals of the first winding coil 21 and the conductive metal column 3.

[0061] Based on the above discussion, the conductive metal pillars 3 in this embodiment may have a variety of different configurations. In an optional embodiment of the present application, the conductive metal pillars 3 may include:

[0062] Two first conductive metal pillars 31 located at the outermost sides and four second conductive metal pillars 32 arranged in sequence between the two first conductive metal pillars 31;

[0063] The two terminals of the two first winding coils 21 at the outer positions are connected to the first conductive metal pillar 31 and the second conductive metal pillar 32 which are closest to each other; the two terminals of the first winding coil 21 at the middle position are connected to the two second conductive metal pillars 32 at the middle position respectively;

[0064] The two outermost second conductive metal pillars 32 in each second conductive metal pillar 32 are electrically connected to the second conductive metal pillar 32 closest to each other; and the two first conductive metal pillars 31 are electrically connected through a conductive metal rod 4 arranged between each conductive metal pillar 3 and the magnetic core structure 1; the conductive metal rod 3 and the terminal of each first winding coil 21 extending to each conductive metal pillar 3 are staggered.

[0065] In this embodiment, six conductive metal pillars 3 are sequentially arranged along one side of the magnetic core structure 1 . Obviously, each group of first winding coils 21 needs to have two terminals. Therefore, the two terminals of each first winding coil 21 are respectively connected to a conductive metal pillar 3 . In order to simplify the connection structure, the two terminals of each first winding coil 21 are respectively connected to the two conductive metal pillars 3 closest to it, that is, the two terminals of the first winding coil 21 are respectively electrically connected to the first and second conductive metal pillars 3; the two terminals of the second first winding coil 21 are respectively electrically connected to the third and fourth conductive metal pillars 3; the two terminals of the third first winding coil 21 are respectively electrically connected to the fifth and sixth conductive metal pillars 3; on this basis, to achieve a triangular connection between the three first winding coils 21, it is necessary to electrically connect the second conductive metal pillar 3 and the third conductive metal pillar 3, the fourth conductive metal pillar 3 and the fifth conductive metal pillar 3, and the first conductive metal pillar 3 and the sixth conductive metal pillar 3; because the distance between the first conductive metal pillar 3 and the sixth conductive metal pillar 3 is the farthest, the structure for achieving electrical connection between the two is different from the connection structure between other conductive metal pillars 3.

[0066] For the sake of convenience, the two conductive metal pillars 3 that are the farthest apart and arranged on the outermost sides are referred to as the first conductive metal pillars 31, and the conductive metal pillars 3 excluded between the two first conductive metal pillars 31 are referred to as the second conductive metal pillars 32; obviously, among the three first winding coils 21 located on the middle pillar 101, the first winding coils 21 located on both sides are electrically connected to the first conductive metal pillar 31 and the second conductive metal pillar 32 that are closest to each other, and the first winding coil 21 located in the middle position is electrically connected to the two second conductive metal pillars 32 located in the middle position. Therefore, the first and second second conductive metal pillars 32, as well as the third and fourth second conductive metal pillars 32 are electrically connected, and this electrical connection can be achieved through structures such as pads on the circuit board. The two first conductive metal pillars 31 can be connected through a conductive metal rod 4, and the conductive metal rod 3 extends from one first conductive metal pillar 31 to another first conductive metal pillar 31, and the conductive metal rod 3 and the terminal ends of each first winding coil 21 are staggered in the vertical direction, such as Figure 2 As shown, the conductive metal rod 4 can be arranged below each terminal, thereby improving the structural compactness of the entire transformer to a certain extent and reducing the volume of the transformer as much as possible.

[0067] Of course, in practical applications, the conductive metal column 3 is not limited to the above-mentioned implementation mode. In another optional embodiment of the present application, the conductive metal column may include:

[0068] Two first conductive metal pillars 31 located at the outermost sides and two second conductive metal pillars 32 arranged in sequence between the two first conductive metal pillars 31;

[0069] The two terminals of the two first winding coils 21 at the outer positions are connected to the first conductive metal pillar 31 and the second conductive metal pillar 32 which are closest to each other; the two terminals of the first winding coil 21 at the middle position are connected to the two second conductive metal pillars 32 respectively;

[0070] The two first conductive metal pillars 31 are electrically connected via a conductive metal rod 4 disposed between each conductive metal pillar 3 and the magnetic core structure 1 ; the conductive metal rod 4 and the terminal of each first winding coil 21 extending to each conductive metal pillar 3 are disposed in staggered layers.

[0071] Compared with the above embodiment, the present embodiment is equivalent to combining the first and second second conductive metal pillars 32 that originally need to be electrically connected into one, and combining the third and fourth second conductive metal pillars 32 into one; therefore, in practical applications, it is only necessary to electrically connect the two first winding coils located on both sides with a first conductive metal pillar 31 and a second conductive metal pillar 32 respectively, and the first winding coil 21 located in the middle position is electrically connected to the two second conductive metal pillars 32; on this basis, the two first conductive metal pillars 31 are electrically connected by a conductive metal rod 4. Compared with the above embodiment, the present embodiment can further simplify the transformer structure and improve the compactness of the transformer structure.

[0072] Based on the above discussion, no matter whether six conductive metal pillars 3 or four conductive metal pillars 3 are arranged on the side of the magnetic core structure 1, the same structure can be adopted between the two first conductive metal pillars 31. Figure 7 As shown, in an optional implementation of this embodiment, the first conductive metal pillar 31 may include:

[0073] A main column 311 and an extension portion 312 extending toward one side of the magnetic core structure 1, wherein the main column 311 and the extension portion 312 form an L-shaped structure;

[0074] Both ends of the conductive metal rod 4 are mounted on the extending portions 312 of the two first conductive metal pillars 31 .

[0075] The first conductive metal column 31 in this embodiment is generally L-shaped, so that the two ends of the conductive metal rod 4 can be set on the extensions 312 of the two first conductive metal columns 31. It can be understood that the extension 312 can have a limiting groove that can prevent the first conductive metal column 31 from moving, so that the electrical connection between the conductive metal rod 4 and the two first conductive metal columns 31 can be achieved by simply placing the two ends of the conductive metal rod 4 in the limiting grooves on the extension 312, and the assembly is simple and easy to achieve.

[0076] Based on the above discussion, the connection method of the terminal of the first winding coil 21 is emphasized above, and as mentioned above, the second winding coil 22 is formed by winding a conductive wire, so that the terminal of the second winding coil 22 can adopt an M4 terminal, and the terminal of the second winding coil 22 and the terminal of the first winding coil 21 can extend from opposite sides of the magnetic core structure 1 respectively.

[0077] In summary, in order to reduce the volume of the three-phase five-column transformer as much as possible in the present application, the spacing between the side column and the nearest side column in the core structure is set to half the spacing between the two adjacent middle columns, that is, the gap between the winding coils on the two middle columns closest to the side columns and the side columns is reduced, thereby reducing the size of the three-phase five-column transformer along the arrangement direction of each middle column to a certain extent, and improving the utilization rate of the core; on this basis, the yokes in the two core structures are integrally formed with the side columns and the middle column, thereby improving the stability of the core structure to a certain extent and reducing the difficulty of the entire transformer assembly process. It can be seen that the transformer structure in the present application is more compact, which improves the utilization rate of the core to a certain extent, is conducive to the miniaturization of the transformer, and improves the stability of the core structure in the transformer.

[0078] The present application further provides a circuit device, which may include a circuit board and a three-phase five-column transformer as described in any one of the above items;

[0079] Among them, the three-phase five-column transformer is set on the circuit board with an aluminum substrate.

[0080] In this embodiment, the three-phase five-column transformer is attached to the aluminum substrate on the circuit board, so that the aluminum substrate can be fully utilized to dissipate heat for the three-phase five-column transformer, thereby ensuring the heat dissipation performance of the three-phase five-column transformer in the circuit device to a certain extent.

[0081] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment that includes a series of elements are inherent to the elements. In the absence of more restrictions, the elements limited by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment that includes the elements. In addition, the above-mentioned technical solution provided in the embodiment of the present application is consistent with the corresponding technical solution in the prior art in principle, and the part is not described in detail, so as not to repeat too much.

[0082] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A three-phase five-column transformer, characterized in that: include: Two magnetic core structures of the first magnetic core and the second magnetic core with the same structure; wherein each of the magnetic core structures comprises a yoke, two side columns arranged at both ends of the yoke, and three middle columns arranged in sequence between the two side columns; the yoke, the side columns and the middle column in each of the magnetic core structures are integrally formed; and the distance between each of the side columns and the nearest middle column is half the distance between two adjacent middle columns; the ends of the two side columns of the first magnetic core facing away from the yoke are respectively fitted and connected with the ends of the two side columns of the second magnetic core facing away from the yoke, and the ends of the three middle columns of the first magnetic core facing away from the yoke are respectively fitted and connected with the ends of the three middle columns of the second magnetic core facing away from the yoke in a one-to-one correspondence; The first winding coils are respectively arranged on the three middle columns of the first magnetic core; and the three first winding coils are electrically connected in a triangle; The second winding coils are respectively arranged on the three middle columns of the second magnetic core; and the three second winding coils are electrically connected in a triangle.

2. The three-phase five-column transformer according to claim 1, characterized in that: It also includes a plurality of conductive metal pillars arranged in sequence along the direction in which the three first winding coils are arranged on one side of the magnetic core structure; The two connection terminals of each first winding coil are respectively electrically connected to the two conductive metal pillars that are closest to each other; and the three first winding coils are electrically connected in a triangle shape through the conductive metal pillars.

3. The three-phase five-column transformer according to claim 2, characterized in that: The conductive metal pillars include two first conductive metal pillars located at the outermost sides and four second conductive metal pillars arranged in sequence between the two first conductive metal pillars; Wherein, the two wiring ends of the two first winding coils located at the outer positions are connected to the first conductive metal pillar and the second conductive metal pillar that are closest to each other; the two wiring ends of the first winding coil located at the middle position are respectively connected to the two second conductive metal pillars located at the middle position; The two outermost second conductive metal pillars in each of the second conductive metal pillars are electrically connected to the second conductive metal pillar closest to them; the two first conductive metal pillars are electrically connected via a conductive metal rod disposed between each of the conductive metal pillars and the magnetic core structure; the conductive metal rods and the terminals of each of the first winding coils extending to each of the conductive metal pillars are staggered.

4. The three-phase five-column transformer according to claim 2, characterized in that: The conductive metal pillars include two first conductive metal pillars located at the outermost sides and two second conductive metal pillars arranged in sequence between the two first conductive metal pillars; The two terminals of the two first winding coils at the outer positions are connected to the first conductive metal pillar and the second conductive metal pillar that are closest to each other; the two terminals of the first winding coil at the middle position are connected to the two second conductive metal pillars respectively; The two first conductive metal pillars are electrically connected via a conductive metal rod disposed between each of the conductive metal pillars and the magnetic core structure; the conductive metal rod and the terminal of each of the first winding coils extending to each of the conductive metal pillars are disposed in staggered layers.

5. The three-phase five-column transformer according to claim 3 or 4, characterized in that: The first conductive metal column includes a main column and an extension portion extending toward one side of the magnetic core structure, and the main column and the extension portion form an L-shaped structure; Both ends of the conductive metal rod are mounted on the extension parts of the two first conductive metal pillars.

6. The three-phase five-column transformer according to any one of claims 2 to 4, characterized in that: The connection terminal of each of the first winding coils is a ring-shaped connection terminal, and the ring-shaped connection terminal is sleeve-connected to the conductive metal column.

7. The three-phase five-column transformer according to claim 6, characterized in that: The first winding coil includes a plurality of conductive sheets stacked in sequence; the second winding coil includes a film-wrapped wire wound on a center column of the second magnetic core; and an insulating film sheet is arranged between adjacent first winding coils and second winding coils.

8. The three-phase five-column transformer according to claim 6, characterized in that: Both side ends of each center column are arc ends.

9. The three-phase five-column transformer according to claim 6, characterized in that: The connection terminals of each of the second winding coils and the connection terminals of the first winding coils are respectively located on two opposite sides of the magnetic core structure; and the connection terminals of each of the second winding coils are M4 terminals.

10. A circuit device, characterized in that: It comprises a circuit board and a three-phase five-column transformer as claimed in any one of claims 1 to 9; Wherein, the three-phase five-column transformer is arranged on the circuit board in contact with an aluminum substrate.

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