Transformer

Abstract

A first coil is arranged outside a first core column in a sleeving manner and is provided with a first leading-out part, a second coil is arranged outside a second core column in a sleeving manner and is provided with a second leading-out part, and a third coil is arranged outside a third core column in a sleeving manner and is provided with a third leading-out part; one end of the first conducting bar is arranged on the first leading-out part, the other end of the first conducting bar is provided with a first outgoing line terminal, one end of the second conducting bar is arranged on the second leading-out part, the other end of the second conducting bar is provided with a second outgoing line terminal, one end of the third conducting bar is arranged on the third leading-out part, and the other end of the third conducting bar is provided with a third outgoing line terminal. A straight line formed by connecting a preset point on the first lead-out part and a preset point on the second lead-out part is set as a first straight line; the projection of a preset point on the first outgoing line terminal towards the first direction, the projection of a preset point on the second outgoing line terminal towards the first direction and the projection of a preset point on the third outgoing line terminal towards the first direction are all overlapped with the first straight line.

Description

Technical Field

[0001] This application relates to the technical field of power equipment, and in particular to a transformer. Background Technology

[0002] Three-dimensional wound core transformers are a common transformer structure with advantages such as low loss, good energy saving, and strong overload capacity. In traditional technology, to facilitate the external wiring of three-dimensional wound core transformers, the low-voltage coils must be led out from the same side of the transformer. Therefore, it is necessary to use busbars to lead the three-phase low-voltage coils to the same side of the transformer. However, due to the high cost of busbars, this method leads to waste of busbars, which in turn increases the production cost of the transformer. Utility Model Content

[0003] Therefore, it is necessary to provide a transformer that addresses the problem of wasted conductors and increased transformer production costs caused by using busbars to lead the three-phase low-voltage coils to the same side of the transformer in traditional technologies.

[0004] The technical solution is as follows:

[0005] One embodiment provides a transformer, comprising:

[0006] The core has a first core post, a second core post, and a third core post spaced circumferentially, and the first core post, the second core post, and the third core post all extend along a first direction of the transformer.

[0007] The system comprises a first coil, a second coil, and a third coil. The first coil is sleeved outside the first core post and has a first lead-out portion. The second coil is sleeved outside the second core post and has a second lead-out portion. The third coil is sleeved outside the third core post and has a third lead-out portion.

[0008] A first conductive bus, a second conductive bus, and a third conductive bus. One end of the first conductive bus is located at the first lead-out portion, and the other end of the first conductive bus is located at the first output terminal. One end of the second conductive bus is located at the second lead-out portion, and the other end of the second conductive bus is located at the second output terminal. One end of the third conductive bus is located at the third lead-out portion, and the other end of the third conductive bus is located at the third output terminal. A first straight line is formed by connecting a preset point on the first lead-out portion and a preset point on the second lead-out portion. The projections of the preset points on the first output terminal toward the first direction, the projections of the preset points on the second output terminal toward the first direction, and the projections of the preset points on the third output terminal toward the first direction all overlap with the first straight line.

[0009] In the aforementioned transformer, the first coil, the second coil, and the third coil are respectively mounted on the first core post, the second core post, and the third core post. The first lead-out portion of the first core post is connected to the first conductive busbar, the second lead-out portion of the second core post is connected to the second conductive busbar, and the third lead-out portion of the third core post is connected to the third conductive busbar. This allows the first coil, the second coil, and the third coil to be connected to the outside via the first output terminal, the second output terminal, and the third output terminal, respectively. A preset point on the first lead-out portion and a preset point on the second lead-out portion are connected to form a first straight line. The projection of the preset point on the first output terminal toward the first direction, the projection of the preset point on the second output terminal toward the first direction, and the projection of the third lead-out portion are all considered to be part of the first straight line. The projections of the preset points on the three outgoing terminals toward the first direction all overlap with the first straight line. This not only ensures that the first, second, and third outgoing terminals are roughly on the same straight line, facilitating external wiring of the first, second, and third outgoing terminals, but also makes the distance between the first outgoing terminal and the first lead-out portion, and the distance between the second outgoing terminal and the second lead-out portion, closer, thereby shortening the length of the first and second conductive busbars. Compared with conventional technology, the first and second conductive busbars of the above-mentioned transformer are shorter, which can save raw materials for the conductive busbars during transformer production, thereby reducing the production cost of the transformer.

[0010] In one embodiment, a second straight line is formed by connecting a preset point on the third lead-out portion and a preset point on the third output terminal, and the second straight line is perpendicular to the first straight line.

[0011] In one embodiment, the transformer further includes a mounting frame, which has a first frame, a second frame, and a third frame. The first frame is connected to the second frame, the second frame is connected to the third frame, and the third frame is connected to the first frame. The first conductive busbar is connected to the first frame, the second conductive busbar is connected to the second frame, and the third conductive busbar is connected to the third frame.

[0012] In one embodiment, the transformer further includes a first insulating member, a second insulating member, and a third insulating member. The first insulating member is disposed in the first frame and connected to the first conductive busbar, the second insulating member is disposed in the second frame and connected to the second conductive busbar, and the third insulating member is disposed in the third frame and connected to the third conductive busbar.

[0013] In one embodiment, the first frame is provided with a positioning component, which is connected to the third outgoing terminal.

[0014] In one embodiment, the positioning component includes a positioning seat and a fourth insulating member. The positioning seat is disposed on the first frame, and the fourth insulating member is disposed on the positioning seat and connected to the third outgoing terminal.

[0015] In one embodiment, the first frame, the second frame, and the third frame enclose an installation space, and one side of the iron core along the first direction is located within the installation space. At least one of the first frame, the second frame, and the third frame is provided with a limiting member, which abuts against the side of the iron core located within the installation space.

[0016] In one embodiment, the transformer further includes a fourth conductive bus, which has a fourth outgoing terminal and is connected to the mounting frame. The first coil also has a fourth lead-out portion, the second coil also has a fifth lead-out portion, and the third coil also has a sixth lead-out portion. The fourth lead-out portion, the fifth lead-out portion, and the sixth lead-out portion are all connected to the fourth conductive bus.

[0017] In one embodiment, the transformer further includes a fifth insulating element disposed on the mounting frame and connected to the fourth conductive busbar.

[0018] In one embodiment, the included angle formed by connecting the preset point on the fourth lead-out portion, the center of the first coil, and the preset point on the first lead-out portion in sequence is an obtuse angle; or / and,

[0019] The angle formed by connecting the preset point on the fifth lead-out section, the center of the second coil, and the preset point on the second lead-out section in sequence is an obtuse angle; or / and,

[0020] The angle formed by connecting the preset point on the sixth lead-out section, the center of the third coil, and the preset point on the third lead-out section in sequence is an obtuse angle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the transformer structure in one embodiment of this application.

[0023] Figure 2 This is a structural schematic diagram of the transformer from another angle in one embodiment of this application.

[0024] Figure 3 This is a structural schematic diagram of the transformer at another angle in one embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the transformer at other angles in one embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the iron core structure in one embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the structure of the first coil, the second coil, and the third coil in one embodiment of this application.

[0028] Figure 7 This is a schematic diagram of the structure of the first conductive bus, the second conductive bus, the third conductive bus, and the fourth conductive bus in one embodiment of this application.

[0029] Figure 8 This is a schematic diagram of the structure of the first conductive bus in one embodiment of this application.

[0030] Figure 9 This is a schematic diagram of the limiting member in one embodiment of this application.

[0031] Figure 10 This is an electrical schematic diagram of a transformer in one embodiment of this application.

[0032] Attached image annotations:

[0033] 100, Iron core; 110, First core post; 120, Second core post; 130, Third core post; 140, First iron core frame; 150, Second iron core frame; 160, Third iron core frame; 210, First coil; 211, First lead-out section; 212, Fourth lead-out section; 220, Second coil; 221, Second lead-out section; 222, Fifth lead-out section; 230, Third coil; 231, Third lead-out section; 232, Sixth lead-out section; 310, First conductive busbar; 311, First output terminal; 320, Second conductive busbar; 3 21. Second outgoing terminal; 330. Third conductive bar; 331. Third outgoing terminal; 340. Fourth conductive bar; 341. Fourth outgoing terminal; 400. Mounting frame; 410. First frame; 420. Second frame; 430. Third frame; 510. First insulating component; 520. Second insulating component; 530. Third insulating component; 540. Fifth insulating component; 600. Positioning assembly; 610. Positioning seat; 620. Fourth insulating component; 700. Limiting component; 710. Limiting plate; 720. Buffer pad; 730. Fixing part. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] Please see Figures 1 to 7 One embodiment of this application provides a transformer, including an iron core 100, a first coil 210, a second coil 220, a third coil 230, a first conductive bus 310, a second conductive bus 320, and a third conductive bus 330. The iron core 100 is circumferentially spaced with a first core post 110, a second core post 120, and a third core post 130, all extending along a first direction of the transformer. The first coil 210 is sleeved around the first core post 110 and has a first lead-out portion 211. The second coil 220 is sleeved around the first core post 110. A second lead-out portion 221 is provided outside the second core post 120, and a third coil 230 is sleeved outside the third core post 130 and has a third lead-out portion 231; one end of the first conductive bus 310 is provided at the first lead-out portion 211, and the other end of the first conductive bus 310 is provided at the first output terminal 311; one end of the second conductive bus 320 is provided at the second lead-out portion 221, and the other end of the second conductive bus 320 is provided at the second output terminal 321; one end of the third conductive bus 330 is provided at the third lead-out portion 231, and the other end of the third conductive bus 330 is provided at the third output terminal 331.

[0041] Please see Figure 2 and Figure 4The first straight line is formed by connecting the preset point on the first lead-out portion 211 and the preset point on the second lead-out portion 221. The projection of the preset point on the first lead-out terminal 311 toward the first direction, the projection of the preset point on the second lead-out terminal 321 toward the first direction, and the projection of the preset point on the third lead-out terminal 331 toward the first direction all overlap with the first straight line.

[0042] In the aforementioned transformer, the first coil 210, the second coil 220, and the third coil 230 are respectively sleeved on the first core post 110, the second core post 120, and the third core post 130. The first lead-out portion 211 of the first coil 210 is connected to the first conductive bus 310, the second lead-out portion 221 of the second coil 220 is connected to the second conductive bus 320, and the third lead-out portion 231 of the third coil 230 is connected to the third conductive bus 330. This allows the first coil 210, the second coil 220, and the third coil 230 to be connected to the outside via the first output terminal 311, the second output terminal 321, and the third output terminal 331, respectively. A preset point on the first lead-out portion 211 and a preset point on the second lead-out portion 221 are connected to form a first straight line. The projection of the preset point on the first output terminal 311 toward the first direction and the projection of the preset point on the second output terminal 321 are... The projections of the preset points toward the first direction and the projections of the preset points on the third output terminal 331 toward the first direction both overlap with the first straight line. This not only allows the first output terminal 311, the second output terminal 321, and the third output terminal 331 to be approximately on the same straight line, facilitating external wiring of the first output terminal 311, the second output terminal 321, and the third output terminal 331, but also makes the distance between the first output terminal 311 and the first lead-out portion 211 and the distance between the second output terminal 321 and the second lead-out portion 221 closer, thereby making the lengths of the first conductive busbar 310 and the second conductive busbar 320 shorter. Compared with conventional technology, the first conductive busbar 310 and the second conductive busbar 320 of the above-mentioned transformer are shorter, which can save raw materials for the conductive busbar during transformer production, thereby reducing the production cost of the transformer.

[0043] For explanation, please refer to Figure 4 The first direction of the transformer is the height direction of the transformer (i.e., Figure 4 (in direction A), the first conductive bus 310, the second conductive bus 320 and the third conductive bus 330 serve as the lead structure of the transformer and are located on the upper part of the iron core 100.

[0044] As an explanation, in the above embodiment, the preset point on the first lead-out portion 211 is connected to the preset point on the second lead-out portion 221 to form a first straight line. The projections of the preset points on the first lead-out terminal 311 toward the first direction, the projections of the preset points on the second lead-out terminal 321 toward the first direction, and the projections of the preset points on the third lead-out terminal 331 toward the first direction all overlap with the first straight line. That is, at least one point on the first lead-out terminal 311 has a projection that overlaps with the first straight line, at least one point on the second lead-out terminal 321 has a projection that overlaps with the first straight line, and at least one point on the third lead-out terminal 331 has a projection that overlaps with the first straight line. The above three points are the preset points of the first lead-out terminal 311, the second lead-out terminal 321, and the third lead-out terminal 331, which will not be elaborated here.

[0045] Furthermore, the conductive busbar is usually made of copper and is long and strip-shaped. Copper has excellent conductivity, but it is expensive. In the above embodiment, the distance between the first output terminal 311 and the first lead-out portion 211 and the distance between the second output terminal 321 and the second lead-out portion 221 are relatively close, which can greatly shorten the length of the first conductive busbar 310 and the second conductive busbar 320, thereby saving the raw materials of the conductive busbar.

[0046] Please see Figures 7 to 8 In one embodiment, the first output terminal 311 is flat and vertically welded to the end of the first conductive bus 310 away from the first lead-out portion 211, the second output terminal 321 is flat and vertically welded to the end of the second conductive bus 320 away from the second lead-out portion 221, and the third output terminal 331 is flat and bent and disposed at the end of the third conductive bus 330 away from the third lead-out portion 231. The planes where the first output terminal 311, the second output terminal 321, and the third output terminal 331 are located are coplanar and parallel to the first direction, so as to facilitate the external wiring of the first output terminal 311, the second output terminal 321, and the third output terminal 331.

[0047] For further explanation, please refer to Figure 5 The transformer in the above embodiment is a three-dimensional wound core transformer. The core 100 includes a first core frame 140, a second core frame 150, and a third core frame 160. The first core frame 140, the second core frame 150, and the third core frame 160 are connected end to end to form an equilateral triangle layout. The first core post 110, the second core post 120, and the third core post 130 are located at the three corners of the equilateral triangle, respectively.

[0048] Furthermore, the first coil 210 is wound on the first core post 110. During the winding process, one end of the first coil 210 located on the innermost winding is led out as the fourth lead-out part 212 (the fourth lead-out part 212 is mentioned below and will not be repeated here), one end of the first coil 210 located on the outermost winding is led out as the first lead-out part 211, the fourth lead-out part 212 serves as the beginning of the first coil 210, and the first lead-out part 211 serves as the end of the first coil 210, forming a closed circuit after being energized; the second coil 220 is wound on the second core post 120, and the third coil 230 is wound on the third core post 130. The specific winding details are similar to those of the first coil 210 and will not be repeated here.

[0049] As a further explanation, in the above embodiment, the preset point on the first lead-out portion 211 is connected to the preset point on the second lead-out portion 221 and forms a first straight line. The projections of the preset point on the first output terminal 311 toward the first direction, the projections of the preset point on the second output terminal 321 toward the first direction, and the projections of the preset point on the third output terminal 331 toward the first direction all overlap with the first straight line. It can also be understood that the first lead-out portion 211 and the first output terminal 311, as well as the second lead-out portion 221 and the second output terminal 321, are in the same plane from a top-view angle (i.e., Figure 4 The two conductive busbars are approximately overlapped, which ensures that the paths of the first conductive busbar 310 and the second conductive busbar 320 are the shortest, thereby saving conductive busbars.

[0050] As an example, the wiring method of the three-dimensional wound core 100 transformer in the above embodiment is the Dyn11 connection, and its electrical schematic diagram is as follows: Figure 10 This will not be elaborated upon here.

[0051] Please see Figures 1 to 4 In one embodiment, a second straight line is formed by connecting a preset point on the third lead-out portion 231 and a preset point on the third output terminal 331, and the second straight line is perpendicular to the first straight line.

[0052] This configuration ensures that the distance between the end of the third busbar 330 connected to the third lead-out portion 231 and the third output terminal 331 is minimized, further saving on busbar raw materials.

[0053] Furthermore, the third conductive bus 330 is elongated, and the axis of the elongated third conductive bus 330 is collinear with the second straight line to ensure that the path between the two opposite ends of the third conductive bus 330 is the shortest.

[0054] Please see Figures 1 to 4In one embodiment, the transformer further includes a mounting frame 400, which has a first frame 410, a second frame 420 and a third frame 430. The first frame 410 is connected to the second frame 420, the second frame 420 is connected to the third frame 430, and the third frame 430 is connected to the first frame 410. A first conductive bar 310 is connected to the first frame 410, a second conductive bar 320 is connected to the second frame 420, and a third conductive bar 330 is connected to the third frame 430.

[0055] The first frame 410, the second frame 420, and the third frame 430 form a triangular mounting frame 400, which matches the equilateral triangle layout of the iron core 100. The first frame 410, the second frame 420, and the third frame 430 respectively correspond to the three sides of the equilateral triangle layout of the iron core 100. The first conductive bus 310 is connected to the first frame 410, the second conductive bus 320 is connected to the second frame 420, and the third conductive bus 330 is connected to the third frame 430. This can improve the installation strength of the first conductive bus 310, the second conductive bus 320, and the third conductive bus 330, prevent the conductive bus from deforming, and improve the reliability of the transformer.

[0056] Please see Figure 8 In one embodiment, in order to ensure that the first conductive bus 310 can connect the first lead-out portion 211 to the external wiring, the first conductive bus 310 needs to achieve angular rotation and planar displacement on a narrow plane. Ordinary bending process cannot achieve the effect that the plane where the first lead-out terminal 311 is located is flush with the plane where the second lead-out terminal 321 and the plane where the third lead-out terminal 331 is located. Therefore, on the premise of ensuring that the first conductive bus 310 has a sufficient current-carrying cross section in the shortest path of current flow, it is necessary to cut off the bent part of the first conductive bus 310, and then vertically weld the other end of the first conductive bus 310 to the remaining part of the first conductive bus 310 to achieve the purpose that ordinary bending process cannot achieve. In this way, conductive bus can be saved.

[0057] Please see Figures 1 to 4 In one embodiment, the transformer further includes a first insulating member 510, a second insulating member 520, and a third insulating member 530. The first insulating member 510 is disposed in the first frame 410 and connected to the first conductive bus 310. The second insulating member 520 is disposed in the second frame 420 and connected to the second conductive bus 320. The third insulating member 530 is disposed in the third frame 430 and connected to the third conductive bus 330.

[0058] The first conductive bus 310 is connected to the first frame 410 through the first insulating member 510, the second conductive bus 320 is connected to the second frame 420 through the second insulating member 520, and the third conductive bus 330 is connected to the third frame 430 through the third insulating member 530. In this way, not only can the installation strength of the first conductive bus 310, the second conductive bus 320 and the third conductive bus 330 be improved and deformation of the conductive bus be prevented, but also insulation effect can be provided between the conductive bus and the mounting frame 400 and sufficient electrical insulation distance can be maintained to ensure the safe operation of the transformer.

[0059] Furthermore, the first insulating member 510 is connected to the area between the two ends of the first conductive bus 310, the second insulating member 520 is connected to the area between the two ends of the second conductive bus 320, and the third insulating member 530 is connected to the area between the two ends of the third conductive bus 330. Even further, the first insulating member 510 can be provided singly or in multiples, depending on the manufacturing cost of the transformer and the actual application scenario; no specific limitation is made here. The second insulating member 520 and the third insulating member 530 are similar to the first insulating member 510, and will not be described in detail here.

[0060] Please see Figure 1 In one embodiment, the first frame 410 is provided with a positioning component 600, which is connected to the third outgoing terminal 331.

[0061] To ensure that the third output terminal 331 is aligned with the first output terminal 311 and the second output terminal 321, the third conductive bus 330 needs to extend from the third frame 430 to near the first frame 410. The relatively long extension distance makes the third conductive bus 330 more prone to deformation. By providing a positioning component 600 on the first frame 410, the third output terminal 331 on the third conductive bus 330 can be positioned to prevent deformation of the third output terminal 331 due to excessive extension length, thereby further improving the strength of the third conductive bus 330 and improving the reliability of the transformer.

[0062] Please see Figure 1 In one embodiment, the positioning component 600 includes a positioning seat 610 and a fourth insulating member 620. The positioning seat 610 is disposed on the first frame 410, and the fourth insulating member 620 is disposed on the positioning seat 610 and connected to the third outgoing terminal 331.

[0063] The fourth insulating component 620 is mounted on the first frame 410 via the positioning seat 610 to ensure the installation stability of the fourth insulating component 620. The third outgoing terminal 331 is connected to the positioning seat 610 via the fourth insulating component 620. In this way, not only can the strength of the third conductive bus 330 be improved, but also insulation effect can be provided between the third outgoing terminal 331 and the mounting frame 400 and sufficient electrical insulation distance can be maintained to ensure the safe operation of the transformer.

[0064] Please see Figure 3 In one embodiment, the first frame 410, the second frame 420 and the third frame 430 are arranged to form an installation space, and one side of the iron core 100 along the first direction is located in the installation space. At least one of the first frame 410, the second frame 420 and the third frame 430 is provided with a limiting member 700, which abuts against the side of the iron core 100 located in the installation space.

[0065] The limiting member 700 can abut against the side of the iron core 100 located in the installation space to limit the position of the iron core 100, so that the iron core 100 is relatively fixed with the mounting frame 400, preventing the iron core 100 from moving and causing deformation of the conductor and lead-out part, which would damage the transformer.

[0066] Please see Figure 9 In one embodiment, the limiting member 700 includes a limiting plate 710, a buffer pad 720, and a fixing part 730. The buffer pad 720 and the fixing part 730 are respectively disposed at opposite ends of the limiting plate 710. The end of the limiting plate 710 away from the buffer pad 720 is connected to at least one of the first frame 410, the second frame 420, and the third frame 430 through the fixing part 730. The buffer pad 720 can prevent the iron core 100 from making hard contact with the limiting plate 710 and causing damage, thereby improving the service life of the transformer.

[0067] Furthermore, the connection method between the fixing part 730 and at least one of the first frame 410, the second frame 420, and the third frame 430 can be welding, bonding, or screwing, etc., without specific limitation here; Figure 9 In the embodiment shown, the fixing part 730 is connected by a screw connection.

[0068] In one embodiment, the cushioning pad 720 is made of silicone to give it good insulation properties.

[0069] Please see Figures 1 to 4 , Figure 6 as well as Figure 7In one embodiment, the transformer further includes a fourth conductive bus 340, which has a fourth output terminal 341 and is connected to the mounting frame 400. The first coil 210 also has a fourth lead-out portion 212, the second coil 220 also has a fifth lead-out portion 222, and the third coil 230 also has a sixth lead-out portion 232. The fourth lead-out portion 212, the fifth lead-out portion 222, and the sixth lead-out portion 232 are all connected to the fourth conductive bus 340.

[0070] The first coil 210, the second coil 220, and the third coil 230 are connected to the fourth conductive bus 340 through the fourth lead-out part 212, the fifth lead-out part 222, and the sixth lead-out part 232, respectively. Finally, they are connected to the outside through the fourth output terminal 341, thus forming a closed circuit after being energized.

[0071] Furthermore, the fourth lead-out 212 serves as the beginning of the first coil 210, and the first lead-out 211 serves as the end of the first coil 210, forming a closed loop after energization; similarly, the fifth lead-out 222 serves as the beginning of the second coil 220, and the second lead-out 221 serves as the end of the second coil 220, forming a closed loop after energization; the sixth lead-out 232 serves as the beginning of the third coil 230, and the third lead-out 231 serves as the end of the third coil 230, forming a closed loop after energization, thereby enabling the entire transformer to form a circuit.

[0072] Please see Figures 2 to 3 In one embodiment, the transformer further includes a fifth insulating element 540, which is disposed on the mounting frame 400 and connected to the fourth conductive bus 340.

[0073] The fourth conductive bus 340 is connected to the mounting frame 400 through the fifth insulating member 540, which not only improves the installation strength of the fourth conductive bus 340, but also provides insulation between the fourth conductive bus 340 and the mounting frame 400 and maintains a sufficient electrical insulation distance to ensure the safe operation of the transformer.

[0074] In one embodiment, the first insulating element 510, the second insulating element 520, the third insulating element 530, the fourth insulating element 620, and the fifth insulating element 540 are all insulators, and each insulator is connected to its corresponding conductive busbar by a threaded connection, which will not be described in detail here.

[0075] Please see Figure 6 In one embodiment, the included angle formed by connecting the preset point on the fourth lead-out portion 212, the center of the first coil 210, and the preset point on the first lead-out portion 211 in sequence is an obtuse angle.

[0076] This configuration ensures that, without changing the number of turns of the first coil 210, the first coil 210 does not need to be wound a full turn when leading out the first lead 211. Only one turn of the coil minus the length of the obtuse angle is needed, thus saving wire in the first coil 210 and reducing the resistance loss of the first coil 210.

[0077] Please see Figure 6 As an embodiment that can be implemented simultaneously with the above embodiments, the included angle formed by connecting the preset point on the fifth lead-out portion 222, the center of the second coil 220, and the preset point on the second lead-out portion 221 in sequence is an obtuse angle.

[0078] Similar to the first coil 210, it will not be described again here.

[0079] Please see Figure 6 As an embodiment that can be implemented simultaneously with the above embodiments, the included angle formed by connecting the preset point on the sixth lead-out portion 232, the center of the third coil 230, and the preset point on the third lead-out portion 231 in sequence is an obtuse angle.

[0080] Similar to the first coil 210, it will not be described again here.

[0081] Furthermore, the first coil 210, the second coil 220, and the third coil 230 are all made using a foil winding process, which saves a large amount of copper foil for each coil, thereby further reducing production costs.

[0082] Furthermore, in the above embodiment, the obtuse angle is approximately 120°.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A transformer, characterized in that, include: The core has a first core post, a second core post, and a third core post spaced circumferentially, and the first core post, the second core post, and the third core post all extend along a first direction of the transformer. The system comprises a first coil, a second coil, and a third coil. The first coil is sleeved outside the first core post and has a first lead-out portion. The second coil is sleeved outside the second core post and has a second lead-out portion. The third coil is sleeved outside the third core post and has a third lead-out portion. A first conductive bus, a second conductive bus, and a third conductive bus. One end of the first conductive bus is located at the first lead-out portion, and the other end of the first conductive bus is located at the first output terminal. One end of the second conductive bus is located at the second lead-out portion, and the other end of the second conductive bus is located at the second output terminal. One end of the third conductive bus is located at the third lead-out portion, and the other end of the third conductive bus is located at the third output terminal. A first straight line is formed by connecting a preset point on the first lead-out portion and a preset point on the second lead-out portion. The projections of the preset points on the first output terminal toward the first direction, the projections of the preset points on the second output terminal toward the first direction, and the projections of the preset points on the third output terminal toward the first direction all overlap with the first straight line.

2. The transformer according to claim 1, characterized in that, The second straight line is formed by connecting the preset point on the third lead-out portion and the preset point on the third output terminal, and the second straight line is perpendicular to the first straight line.

3. The transformer according to claim 1, characterized in that, The transformer also includes a mounting frame, which has a first frame, a second frame and a third frame. The first frame is connected to the second frame, the second frame is connected to the third frame, and the third frame is connected to the first frame. The first conductive busbar is connected to the first frame, the second conductive busbar is connected to the second frame, and the third conductive busbar is connected to the third frame.

4. The transformer according to claim 3, characterized in that, The transformer further includes a first insulating component, a second insulating component, and a third insulating component. The first insulating component is disposed in the first frame and connected to the first conductive busbar. The second insulating component is disposed in the second frame and connected to the second conductive busbar. The third insulating component is disposed in the third frame and connected to the third conductive busbar.

5. The transformer according to claim 3, characterized in that, The first frame is provided with a positioning component, which is connected to the third outgoing terminal.

6. The transformer according to claim 5, characterized in that, The positioning component includes a positioning seat and a fourth insulating member. The positioning seat is disposed on the first frame, and the fourth insulating member is disposed on the positioning seat and connected to the third outgoing terminal.

7. The transformer according to claim 3, characterized in that, The first frame, the second frame, and the third frame enclose an installation space. One side of the iron core along the first direction is located within the installation space. At least one of the first frame, the second frame, and the third frame is provided with a limiting member, which abuts against the side of the iron core located within the installation space.

8. The transformer according to claim 3, characterized in that, The transformer also includes a fourth conductive bus, which has a fourth outgoing terminal and is connected to the mounting frame. The first coil also has a fourth lead-out portion, the second coil also has a fifth lead-out portion, and the third coil also has a sixth lead-out portion. The fourth lead-out portion, the fifth lead-out portion, and the sixth lead-out portion are all connected to the fourth conductive bus.

9. The transformer according to claim 8, characterized in that, The transformer also includes a fifth insulating component, which is disposed on the mounting frame and connected to the fourth conductive busbar.

10. The transformer according to claim 8, characterized in that, The angle formed by connecting the preset point on the fourth lead-out section, the center of the first coil, and the preset point on the first lead-out section in sequence is an obtuse angle; or / and, The angle formed by connecting the preset point on the fifth lead-out section, the center of the second coil, and the preset point on the second lead-out section in sequence is an obtuse angle; or / and, The angle formed by connecting the preset point on the sixth lead-out section, the center of the third coil, and the preset point on the third lead-out section in sequence is an obtuse angle.

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