Transformer

Abstract

To provide a transformer.SOLUTION: A transformer includes a winding frame, a first magnetic core, a second magnetic core, and a winding. The winding frame includes two side walls which are provided oppositely along a first direction, and a bottom wall which connects the two side walls. Along a second direction, both sides of the bottom wall are each provided with a stop plate. A length of the stop plate in a third direction is less than a length of each of the two side walls in the third direction. The bottom wall, the two side walls and the two stop plates together around form a mounting part. The first magnetic core is at least partially located in the mounting part. The winding is wound on an outer side of the first magnetic core, the bottom wall and the two stop plates. The second magnetic core, outside of the winding, is provided covering a part of the winding, and is connected to the first magnetic core.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present application relates to the field of electrical equipment technology, in particular to transformers. [Background technology]

[0002] Transformers are an important component in electrical equipment, regulating different voltages and making the voltage reach a range that can be applied by electrical equipment so that the electrical equipment can operate.

[0003] Fig. 1 is an exploded view of a transformer in the prior art. Referring to Fig. 1, the transformer includes a winding frame 100, a magnetic core 200, a winding 300, an insulating tape 400, and an adsorption part 500, where the winding frame 100 includes a base 101 and a winding part 102 provided in the middle of the base 101, the winding part 102 is provided protruding from the base 101, a wire groove 104 is formed on the outer surface of the winding part 102, the winding 300 is wound in the wire groove 104, a through hole 103 is provided in the winding part 102, at least a part of the magnetic core 200 is drilled in the through hole 103 along the axis of the through hole 103, and the remaining magnetic core 200 is provided on the base 101 and surrounds the winding 300.

[0004] However, in the technical means of the prior art, the winding part 102 is arranged to protrude from the base 101, so that the space between the lower part of the winding part 102 and the base 101 cannot be utilized, and the overall size of the transformer is large, which is disadvantageous in miniaturizing the transformer. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to overcome the above-mentioned shortcomings in the related art, the present application aims to provide a transformer which is advantageous in reducing the size of the transformer. [Means for solving the problem]

[0006] The present application relates to a winding frame, a first magnetic core, a second magnetic core, and a winding, the winding frame includes two side walls provided opposite to each other along a first direction and a bottom wall connecting the two side walls, stop plates are provided on both sides of the bottom wall along a second direction, a length of the stop plate in a third direction is smaller than a length of each of the two side walls in the third direction, the bottom wall, the two side walls, and the two stop plates together form a mounting part, at least a portion of the first magnetic core is located within the mounting part, the winding is wound around the first magnetic core, the bottom wall, and the two stop plates, the second magnetic core is provided as a cover around the outside of a portion of the winding and is connected to the first magnetic core, The first direction, the second direction and the third direction are perpendicular to each other.

[0007] In the present application, a first magnetic core is provided within a mounting portion located inside the winding frame, and the winding is wound around the outside of the first magnetic core, so that there is an overlapping portion between the magnetic core, the winding, and each of the two side walls in the third direction. In other words, the installation of the magnetic core and the winding utilizes more of the space inside the winding frame, and is advantageous in reducing the length of the transformer in the third direction and reducing the overall size of the transformer compared to the technical means of the related art.

[0008] In a possible embodiment, in the third direction, the bottom wall is connected to the center portions of the two side walls, and the bottom wall forms a winding space together with the two side walls, The length of the winding in the third direction is smaller than the length of each of the two side walls in the third direction.

[0009] In a possible embodiment, the second magnetic core is rectangular, the first magnetic core includes a first top pillar and a first side pillar perpendicularly connected to both opposing ends of the first top pillar, and the end of the first side pillar away from the first top pillar is connected to the second magnetic core.

[0010] In a possible embodiment, in the second direction, the length of the second magnetic core is less than or equal to the length of the first top post.

[0011] In a possible embodiment, in a plane perpendicular to the first direction, the projected area of ​​the second magnetic core is equal to the projected area of ​​the first apex pillar.

[0012] In a possible embodiment, the length of the second magnetic core is greater than or equal to the length of the first magnetic core in the first direction.

[0013] In a possible embodiment, a first transition surface is provided between the first top pillar and each of the first side pillars, and the first transition surface forms an inclined surface or a circular arc surface.

[0014] In a possible embodiment, the first magnetic core is rectangular, and the second magnetic core includes a second apex pillar and second side pillars perpendicularly connected to both opposing ends of the second apex pillar, and the ends of the second side pillars away from the second apex pillar are connected to the first magnetic core.

[0015] In a possible embodiment, in the second direction, the length of the first magnetic core is less than or equal to the length of the second top post.

[0016] In a possible embodiment, in a plane perpendicular to the first direction, the projected area of ​​the first magnetic core is equal to the projected area of ​​the second apex pillar.

[0017] In a possible embodiment, the length of the first magnetic core is greater than or equal to the length of the second magnetic core in the first direction.

[0018] In a possible embodiment, a second transition surface is provided between the second top pillar and each of the second side pillars, and the second transition surface is an inclined surface or a circular arc surface.

[0019] In a possible embodiment, the first magnetic core includes a first vertex pillar and a first side pillar vertically connected to both opposing ends of the first vertex pillar, and the second magnetic core includes a second vertex pillar and a second side pillar vertically connected to both opposing ends of the second vertex pillar, and an end of the first side pillar away from the first vertex pillar is connected to an end of a corresponding second side pillar away from the second vertex pillar.

[0020] In a possible embodiment, a first transition surface is provided between the first top pillar and each side pillar of the first side pillar, and the first transition surface is an inclined surface or a circular arc surface; A second transition surface is provided between the second apex pillar and each of the second side pillars, and the second transition surface forms an inclined surface or a circular arc surface.

[0021] In a possible embodiment, in the second direction, the length of the bottom wall is smaller than the length of each of the two side walls, a retaining wall is provided at both ends of each of the two side walls, the retaining wall is provided toward the winding, and in the first direction, a notch is formed between two adjacent retaining walls for the winding to pass through.

[0022] In a possible embodiment, an abutment plate is provided at the end of the retaining plate remote from the bottom wall, connecting the retaining wall.

[0023] In a possible embodiment, a limiting plate is further connected to an end of the abutment plate that is away from a corresponding one of the two side walls in the first direction, and the winding is positioned between the two limiting plates that face each other in the first direction.

[0024] In a possible embodiment, the surface of the stop plate facing away from the bottom wall is inclined or arcuate.

[0025] In a possible embodiment, in the first direction, a partition plate is provided in a central portion of the retaining plate, and the winding includes a first winding and a second winding, the first winding and the second winding being respectively located on both sides of the partition plate.

[0026] In a possible embodiment, at least one pin is provided on the side of each of the two side walls facing away from the winding, and in the third direction, the pin is located at an end of a corresponding one of the two side walls farther from the second magnetic core.

[0027] In a possible embodiment, a clearance groove is provided in each of the two side walls, the clearance groove being intended to increase the creepage distance between the pin and the first magnetic core and / or the second magnetic core.

[0028] In a possible embodiment, each of the two side walls includes a first surface and a third surface arranged opposite each other along the second direction, and a second surface and a fourth surface arranged opposite each other along the third direction, and the clearance groove includes a first groove segment arranged in the first surface, a second groove segment arranged in the second surface, a third groove segment arranged in the third surface, and a fourth groove segment arranged in the fourth surface, and the first groove segment, the second groove segment, the third groove segment, and the fourth groove segment are in communication with each other.

[0029] In a possible embodiment, in a plane perpendicular to the third direction, the projected area of ​​the second magnetic core is greater than or equal to the projected area of ​​the first magnetic core.

[0030] In order to more clearly describe the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. The accompanying drawings in the following description are part of the embodiments of the present application, and it will be apparent to those skilled in the art that they can derive other drawings based on these drawings without exerting creative efforts. [Brief description of the drawings]

[0031] [Figure 1] FIG. 1 is an exploded view of a transformer according to the prior art. [Diagram 2] FIG. 2 is a structural schematic diagram of a transformer provided in one embodiment of the present application. [Diagram 3] FIG. 2 is an exploded view of a transformer provided in one embodiment of the present application. [Figure 4] FIG. 2 is an exploded view of a transformer provided in another embodiment of the present application. [Diagram 5] 1 is a structural schematic diagram of a magnetic core provided in one embodiment of the present application. [Figure 6] FIG. 2 is a structural schematic diagram of a winding frame provided in one embodiment of the present application. [Figure 7] FIG. 13 is a structural schematic diagram of a winding frame provided in another embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the accompanying drawings in the present application, but it is clear that the described embodiments are only a part of the embodiments in the present application, and are not all of the embodiments.

[0033] Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without any creative effort belong to the scope of protection of the present application. The following embodiments and features of the embodiments may be combined if there is no conflict.

[0034] As described in the background art, in transformers of the related art, the winding frame structure includes a base and a winding section protruding from the base, so that both the winding and the magnetic core are located on the base, making the transformer tall and the overall size large, which is disadvantageous for miniaturization.

[0035] Therefore, an embodiment of the present application aims to provide a transformer in which a first magnetic core is provided within a mounting portion located inside a winding frame, and the winding is wound around the outside of the first magnetic core, thereby creating an overlapping portion between the magnetic core, the winding, and the side wall in the height direction, thereby further reducing the height of the transformer and providing an advantage in reducing the overall size of the transformer.

[0036] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the contents of the embodiments of the present application will be described in detail with reference to the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0037] FIG. 2 is a structural schematic diagram of a transformer provided in one embodiment of the present application. FIG. 3 is an exploded view of a transformer provided in one embodiment of the present application. FIG. 4 is an exploded view of a transformer provided in another embodiment of the present application. FIG. 5 is a structural schematic diagram of a magnetic core provided in one embodiment of the present application. FIG. 6 is a structural schematic diagram of a winding frame provided in one embodiment of the present application. FIG. 7 is a structural schematic diagram of a winding frame provided in another embodiment of the present application. In this embodiment, the first direction X, the second direction Y, and the third direction Z are three different directions perpendicular to each other in a three-dimensional space, where the third direction Z may be, for example, a height direction (vertical direction).

[0038] 2 to 7, the present application provides a transformer including a winding frame 100, a magnetic core 200, and a winding 300.

[0039] The winding frame 100 includes two side walls 110 provided opposite to each other along a first direction X and a bottom wall 120 connecting the two side walls 110, and the bottom wall 120 may be disposed perpendicular to each side wall of the two side walls 110. Along the second direction Y, a retaining plate 130 is provided on both sides of the bottom wall 120, and the retaining plate 130 is provided perpendicular to each side wall of the two side walls 110 and the bottom wall 120 at the same time. Along the first direction X, the retaining plate 130 may extend from one side wall of one of the two side walls 110 to the other side wall of the other two side walls 110, or the retaining plate 130 may be provided only in a part of the area between the two side walls 110. In this embodiment, the retaining plate 130 extends from one side wall of one of the two side walls 110 to the other side wall of the other two side walls 110. In order to form a notch in the second direction Y, the length of the stop plate 130 in the third direction Z is smaller than the length of each of the two side walls 110 in the third direction Z. In this embodiment, the bottom wall 120, the two side walls 110 and the two stop plates 130 together constitute the mounting part 10, which corresponds to a groove provided in the winding frame 100 as shown in Figures 6 and 7, and this groove has a notch on both sides in the second direction Y to form the stop plate 130 with a lower height than each of the two side walls 110 to facilitate the subsequent assembly of the magnetic core 200 and the winding 300.

[0040] The magnetic core 200 includes a first magnetic core 210 and a second magnetic core 220, where at least a portion of the first magnetic core 210 is located in the mounting portion. Exemplarily, the volume of the first magnetic core 210 is compatible with the volume of the mounting portion 10 and can fill the mounting portion 10. The winding 300 is wound around the outside of the first magnetic core 210, the bottom wall 120, and the two retaining plates 130 with an axis parallel to the first direction X. The second magnetic core 220 is provided on the outside of a portion of the winding 300 and connects to the first magnetic core 210. Exemplarily, the first magnetic core 210 and the second magnetic core 220 form a structure having an opening in the second direction Y, and a portion of the winding 300 is drilled into the opening.

[0041] In the embodiment of the present application, the first magnetic core 210 is provided within the mounting portion 10 located inside the winding frame 100, and the winding 300 is wound around the outside of the first magnetic core 210, so that there is an overlapping portion between the magnetic core 200 and the winding 300 and each of the two side walls 110 in the third direction Z. In other words, the provision of the magnetic core 200 and the winding 300 utilizes more of the space inside the winding frame 100, and is advantageous in reducing the length of the transformer in the third direction Z and reducing the overall size of the transformer compared to the related art means.

[0042] 6 and 7, in some possible embodiments, in the third direction Z, the bottom wall 120 is connected to the center of the two side walls 110, and the bottom wall 120 forms the winding space 20 together with the two side walls 110. The winding 300 is wound on the first magnetic core 210, the bottom wall 120 and the two retaining plates 130 and is located in this winding space 20, so that the length of the winding 300 in the third direction Z is smaller than the length of each of the two side walls 110 in the third direction Z, i.e., the winding 300 is not exposed from the winding frame 100 in the third direction Z, which is advantageous to further reduce the length of the transformer in the third direction Z and reduce the size of the transformer.

[0043] 3, in some possible embodiments, the second magnetic core 220 of this embodiment has a rectangular parallelepiped shape, and the first magnetic core 210 includes a first top pillar 211 and a first side pillar 212 perpendicularly connected to both opposing ends of the first top pillar 211, and the first top pillar 211, together with the first side pillars 212 located on both sides thereof, forms a structure with a generally "C" shaped cross section. Here, the end of the first side pillar 212 away from the first top pillar 211 is connected to the second magnetic core 220 to form a closed circuit.

[0044] In the second direction Y, the length of the second magnetic core 220 is equal to or less than the length of the first top pillar 211, thereby reducing the probability of the first magnetic core 210 and the second magnetic core 220 being misaligned in the second direction Y during assembly. At the same time, the upper surface of the second magnetic core 220 can be the upper surface of the transformer and itself can be the adsorption part 500, so that the adsorption part 500 in the prior art is omitted. In another embodiment of the present invention, in a plane perpendicular to the third direction Z, the projected area of ​​the second magnetic core 220 is equal to or greater than the projected area of ​​the first magnetic core 210. This makes the area of ​​the second magnetic core 220 larger, which is more advantageous as the adsorption part 500.

[0045] In a plane perpendicular to the first direction X, the projected area of ​​the second magnetic core 220 is equal to the projected area of ​​the first apex pillar 211. In this embodiment, in a plane perpendicular to the first direction X, the projection of the second magnetic core 220 and the projection of the first apex pillar 211 are both rectangular. The area of ​​the rectangle is equal to the length of the base multiplied by the height, and the lengths of the second magnetic core 220 and the first apex pillar 211 in the second direction Y are the length of the base, and the lengths in the third direction Z are the height. Since the length of the second magnetic core 220 in the second direction Y is equal to or less than the length of the first vertex 211 in the second direction Y, and the projected area of ​​the second magnetic core 220 in a plane perpendicular to the first direction X is equal to the projected area of ​​the first vertex 211 in a plane perpendicular to the first direction X, the length of the second magnetic core 220 in the third direction Z is necessarily equal to or greater than the length of the first vertex 211 in the third direction Z, i.e., the first vertex 211 in this embodiment has a small height, which is advantageous for lowering the overall height of the transformer to reduce the size of the transformer. Note that the projected area of ​​the second magnetic core 220 in a plane perpendicular to the first direction X is equal to the projected area of ​​the first vertex 211 in a plane perpendicular to the first direction X, which does not mean that they are mathematically absolutely the same, but that the designs of the two are basically equivalent, and in this embodiment, the difference is within 10%, etc.

[0046] Furthermore, in the first direction X, the length of the second magnetic core 220 is greater than or equal to the length of the first magnetic core 210, thereby ensuring that both of the two first side pillars 212 of the first magnetic core 210 can contact the second magnetic core 220, and reducing the difficulty of assembling the first magnetic core 210 and the second magnetic core 220.

[0047] In some examples, a first transition surface 213 is further provided between the first top pillar 211 and each side pillar of the first side pillar 212 in this embodiment, and the first transition surface 213 forms a slope or a circular arc surface. By providing the first transition surface 213, the connection thickness between the first top pillar 211 and each side pillar of the first side pillar 212 is increased, stress concentration at the connection part between the first top pillar 211 and each side pillar of the first side pillar 212 is avoided, and the overall strength of the first magnetic core 210 is improved. In addition, the probability that each side pillar of the first side pillar 212 scratches the winding 300 during assembly can be reduced.

[0048] 4, in some possible embodiments, the first magnetic core 210 of this embodiment has a rectangular parallelepiped shape, and the second magnetic core 220 includes a second top pillar 221 and second side pillars 222 perpendicularly connected to both opposing ends of the second top pillar 221, and the second top pillar 221, together with the second side pillars 222 located on both sides thereof, forms a structure with a generally "C" shaped cross section. Here, the ends of each of the second side pillars 222 that are away from the second top pillar 221 are connected to the first magnetic core 210 to form a closed circuit.

[0049] In the second direction Y, the length of the first magnetic core 210 is equal to or less than the length of the second apex pillar 221, thereby reducing the probability that the first magnetic core 210 and the second magnetic core 220 will be misaligned in the second direction Y during assembly.

[0050] In a plane perpendicular to the first direction X, the projected area of ​​the first magnetic core 210 is equal to the projected area of ​​the second apex pillar 221. In this embodiment, in a plane perpendicular to the first direction X, the projection of the first magnetic core 210 and the projection of the second apex pillar 221 are both rectangular. The area of ​​the rectangle is equal to the length of the base multiplied by the height, and the lengths of the first magnetic core 210 and the second apex pillar 221 in the second direction Y are the length of the base, and the lengths in the third direction Z are the height. Since the length of the first magnetic core 210 in the second direction Y is equal to or less than the length of the second vertex 221 in the second direction Y, and the projected area of ​​the first magnetic core 210 in a plane perpendicular to the first direction X is equal to the projected area of ​​the second vertex 221 in a plane perpendicular to the first direction X, the length of the first magnetic core 210 in the third direction Z is necessarily equal to or greater than the length of the second vertex 221 in the third direction Z, i.e., the second vertex 221 in this embodiment has a small height, which is advantageous for lowering the overall height of the transformer to reduce the size of the transformer. Note that the projected area of ​​the first magnetic core 210 in a plane perpendicular to the first direction X is equal to the projected area of ​​the second vertex 221 in a plane perpendicular to the first direction X, which does not mean that they are mathematically absolutely the same, but that the designs of the two are basically equivalent, and in this embodiment, the difference is within 10%, etc.

[0051] Furthermore, in the first direction X, the length of the first magnetic core 210 is greater than or equal to the length of the second magnetic core 220, thereby ensuring that both of the two second edge pillars 222 of the second magnetic core 220 can contact the first magnetic core 210, and reducing the difficulty of assembling the first magnetic core 210 and the second magnetic core 220.

[0052] In some examples, a second transition surface 223 is provided between the second top pillar 221 and each side pillar of the second side pillar 222 in this embodiment, and the second transition surface 223 can be a slope or a circular arc surface. By providing the second transition surface 223, the connection thickness between the second top pillar 221 and each side pillar of the second side pillar 222 is increased, stress concentration at the connection part between the second top pillar 221 and each side pillar of the second side pillar 222 is avoided, and the overall strength of the second magnetic core 220 is improved. In addition, the probability that each side pillar of the second side pillar 222 scratches the winding 300 during assembly can be reduced.

[0053] 5, in some possible embodiments, the first magnetic core 210 of this embodiment includes a first apex pillar 211 and a first side pillar 212 vertically connected to both opposing ends of the first apex pillar 211, and the first apex pillar 211, together with the first side pillars 212 located on both sides, forms a structure with a generally "C"-shaped cross section. The second magnetic core 220 includes a second apex pillar 221 and a second side pillar 222 vertically connected to both opposing ends of the second apex pillar 221, and the second apex pillar 221, together with the second side pillars 222 located on both sides, forms a structure with a generally "C"-shaped cross section. That is, the first magnetic core 210 and the second magnetic core 220 of this embodiment both adopt a structure with a "C"-shaped cross section. The end of each side pillar of the first side pillar 212 that is away from the first apex pillar 211 is connected to the end of each side pillar of the corresponding second side pillar 222 that is away from the second apex pillar 221.

[0054] In addition, a first transition surface 213 is further provided between the first top post 211 and each side post of the first side post 212, and the first transition surface 213 forms a slope or a circular arc surface. By providing the first transition surface 213, the connection thickness between the first top post 211 and each side post of the first side post 212 is increased, stress concentration at the connection part between the first top post 211 and each side post of the first side post 212 is avoided, and the overall strength of the first magnetic core 210 is improved. It can also reduce the probability that each side post of the first side post 212 scratches the winding 300 during assembly.

[0055] A second transition surface 223 is provided between the second top pillar 221 and each side pillar of the second side pillar 222, and the second transition surface 223 can be a slope or a circular arc surface. By providing the second transition surface 223, the connection thickness between the second top pillar 221 and each side pillar of the second side pillar 222 is increased, stress concentration at the connection part between the second top pillar 221 and each side pillar of the second side pillar 222 is avoided, and the overall strength of the second magnetic core 220 is improved. In addition, the probability that each side pillar of the second side pillar 222 scratches the winding 300 during assembly can be reduced.

[0056] 2, 6 and 7, in some possible embodiments, in order to better realize the installation of the winding 300, the length of the bottom wall 120 in the second direction Y is smaller than the length of each of the two side walls 110, and a stop wall 140 is further provided at both ends of each of the two side walls 110, and the stop wall 140 is perpendicular to the second direction Y and provided toward the winding 300. In the first direction X, a notch is formed between the two adjacent stop walls 140 for the winding 300 to pass through. In this way, the winding 300 can be located in the two notches on both sides of the bottom wall 120 in the second direction Y, so that the length of the winding 300 in the second direction Y is smaller than the length of each of the two side walls 110 in the second direction Y, i.e., the winding 300 is not exposed from the winding frame 100 in the second direction Y, which is advantageous to further reduce the length of the transformer in the second direction Y and reduce the size of the transformer.

[0057] Furthermore, in order to realize the assembly of the first magnetic core 210 and the second magnetic core 220, the end of the retaining plate 130 in this embodiment that is away from the bottom wall 120 is provided with an abutment plate 150 that connects the retaining wall 140. With reference to Figures 6 and 7, it can be seen that the abutment plate 150 is parallel to the bottom wall 120 and located at the four corners on the bottom wall 120. The abutment plate 150 is vertically connected to each side wall of the two side walls 110, the retaining wall 140 and the retaining plate 130, and during assembly, an adhesive can be applied to the surface of the abutment plate 150 to facilitate the assembly of the magnetic core 200.

[0058] 6 and 7, in some possible embodiments, each of the two side walls 110 is further provided with a recess 111 on the side facing the winding 300, and the bottom wall 120 is connected to each of the two side walls 110 at the position where the recess 111 is provided. Optionally, the bottom wall 120 and each of the two side walls 110 may be provided as a single piece, for example by an injection molding process.

[0059] 6 and 7, in some possible embodiments, a limiting plate 160 is further connected to an end of the abutting plate 150 that is away from a corresponding one of the two side walls 110 in the first direction X, and the limiting plate 160 is provided perpendicular to the first direction X, and a retaining plate 130 and a retaining wall 140 are connected to both ends of the limiting plate 160 in the second direction Y. The winding 300 is located between the two limiting plates 160 that face each other in the first direction X. The limiting plate 160 prevents the winding 300 from contacting each side post of the second side post 222, and can ensure the safety of use of the transformer.

[0060] In some examples, the surface of the limiting plate 160 facing away from the bottom wall 120 may be an inclined or arcuate surface, and this surface may be inclined from the retaining wall 140 side toward the bottom wall 120 side. With the above configuration, the probability that the limiting plate 160 will scratch the winding 300 may be reduced.

[0061] 2, 6 and 7, in some possible embodiments, at least one pin 180 is further provided on the side of each of the two side walls 110 of this embodiment away from the winding 300 in the first direction X. The winding 300 includes a first winding and a second winding, where the first winding may be, for example, a high-voltage side winding, and the second winding may be, for example, a low-voltage side winding. The first winding is provided with at least one lead wire for connecting the pin 180 on one of the two side walls 110, and the second winding is provided with at least one lead wire for connecting the pin 180 on the other of the two side walls 110. In this embodiment, a plurality of pins 180 are provided on each of the two side walls 110, and the plurality of pins 180 are arranged in two rows, one above the other, in the third direction Z, and each row includes a plurality of pins 180. In the third direction Z, the pin 180 is located at an end of a corresponding one of the two side walls 110 far from the second magnetic core 220, so that the pin 180 has a large pitch and ensures safety when the transformer is used.

[0062] In some possible embodiments, when using the winding frame 100 shown in FIG. 6, the first winding and the second winding of this embodiment are spaced apart along the first direction X, and insulating tape 400 may be wound around the outside of both the first winding and the second winding to ensure insulation.

[0063] As shown in FIG. 7, in some possible embodiments, a partition plate 170 is provided in the center of the retaining plate 130 in the first direction X. When using the winding frame 100 shown in FIG. 5, the first winding and the second winding can be located on both sides of the partition plate 170, and the insulating tape 400 is also wound around the outside of both the first winding and the second winding, thereby further improving the insulation performance between the first winding and the second winding.

[0064] Continuing to refer to Figures 6 and 7, in some possible embodiments, a clearance groove 112 is provided in each side wall of the two side walls 110, and the clearance groove 112 is intended to increase the creepage distance between the pin 180 and the first magnetic core 210 and / or the second magnetic core 220.

[0065] Exemplarily, the clearance groove 112 of this embodiment surrounds each of the two side walls 110 with an axis parallel to the first direction X. Each of the two side walls 110 includes a first surface and a third surface provided opposite to each other along the second direction Y, and a second surface and a fourth surface provided opposite to each other along the third direction Z, and the clearance groove 112 includes a first groove segment provided on the first surface, a second groove segment provided on the second surface, a third groove segment provided on the third surface, and a fourth groove segment provided on the fourth surface, where the first groove segment, the second groove segment, the third groove segment, and the fourth groove segment are in communication with each other.

[0066] Due to the above arrangement, the pin 180 of this embodiment must pass through the clearance groove 112 when reaching the first magnetic core 210 or the second magnetic core 220. This is equivalent to increasing the distance between the side walls of the two clearance grooves 112 perpendicular to the first direction X compared to when the clearance groove 112 is not provided. This increases the creepage distance from the pin 180 to the first magnetic core 210 or the second magnetic core 220, further ensuring safety when using the transformer.

[0067] As described above, in the transformer of this embodiment, the first magnetic core 210 is provided within the mounting portion 10 located inside the winding frame 100, and the winding 300 is wound around the outside of the first magnetic core 210, so that there is an overlapping portion between the magnetic core 200 and the winding 300 and each of the two side walls 110 in the third direction Z. In other words, the installation of the magnetic core 200 and the winding 300 utilizes more of the space inside the winding frame 100, and is advantageous in reducing the length of the transformer in the third direction Z and reducing the overall size of the transformer compared to the related art means.

[0068] Taking the prior art shown in Fig. 1 and the embodiment of the present application shown in Fig. 3 as examples, in comparison with the prior art, the present application changes the winding part 102 of the winding frame 100 from a four-sided closed structure in the prior art to an open structure surrounded by three sides, changes the assembly method of the magnetic core 200 from a left-right assembly to a top-bottom assembly, and changes the assembly method and order between the magnetic cores 200 and between the magnetic core 200 and the winding 300, which was indirectly wound around the magnetic core 200 via the wire groove 104 in the prior art. In addition, the present application solves the problem of insufficient safety distance from the magnetic core 200 to the pin 180 after the structure change by raising both ends of the base 101 in the prior art to form two side walls 110.

[0069] In the description of the present application, the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the drawings and are merely for the purpose of simplifying the description and explanation of the present application, and do not indicate or imply that the specified positions or elements must have a specific orientation and be configured and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0070] In this application, unless otherwise clearly specified and limited, the terms "attach," "connect," "join," "connect," "fixed," etc. should be understood in a broad sense, for example, may be fixedly connected, detachably connected, or integral, may be directly connected, may be indirectly connected via an intermediate medium, or may allow internal communication between two elements or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the situation.

[0071] In the description of this application, the terms "first" and "second" are used only to facilitate the description of different components, and should not be understood as indicating or implying an order relationship, relative importance, or the number of the indicated technical features. Thus, a feature limited to "first" or "second" may explicitly or implicitly include one or more features.

[0072] Each example or embodiment in this application will be described in order, with an emphasis on the differences between each example and other examples, and the same or similar parts between the embodiments may be referred to each other.

[0073] In the present description, reference to the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," "particular examples," or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example herein. In the present description, generalized expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] Finally, the above embodiments are only used to describe the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments, or make equivalent substitutions for some or all of the technical features therein, and such modifications or substitutions shall not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application.

[0075] This application claims priority to a Chinese patent application bearing application number 202311093589.X and title "Transformer" filed with the China Patent Office on August 28, 2023, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0076] 10-mounting portion, 20-winding space, 100-winding frame, 101-base, 102-winding portion, 103-through hole, 104-wire groove, 110-side wall, 111-recess, 112-clearance groove, 120-bottom wall, 130-stopping plate, 140-stopping wall, 150-contact plate, 160-limiting plate, 170-partition plate, 180-pin, 200-magnetic core, 210-first magnetic core, 211-first apex pillar, 212-first side pillar, 213-first transition surface, 220-second magnetic core, 221-second apex pillar, 222-second side pillar, 223-second transition surface, 300-winding, 400-insulating tape, 500-suction portion, X-first direction, Y-second direction, Z-third direction

Claims

1. the winding frame includes a winding frame having two side walls provided opposite to each other along a first direction and a bottom wall connecting the two side walls, stop plates are provided on both sides of the bottom wall along a second direction, a length of the stop plate in a third direction is smaller than a length of each of the two side walls in the third direction, the bottom wall, the two side walls and the two stop plates together form a mounting portion, at least a portion of the first magnetic core is located within the mounting portion, the winding is wound around the first magnetic core, the bottom wall and the two stop plates, the second magnetic core is provided as a cover around the outside of a portion of the winding and is connected to the first magnetic core, the first direction, the second direction, and the third direction are perpendicular to each other; A transformer characterized by:

2. In the third direction, the bottom wall is connected to central portions of the two side walls, and the bottom wall forms a winding space together with the two side walls; a length of the winding in the third direction is smaller than a length of each of the two side walls in the third direction; 2. The transformer according to claim 1 .

3. The second magnetic core is rectangular, the first magnetic core includes a first apex pillar and first side pillars perpendicularly connected to both opposing ends of the first apex pillar, and an end of the first side pillar away from the first apex pillar is connected to the second magnetic core.

3. The transformer according to claim 2 .

4. In the second direction, the length of the second magnetic core is equal to or less than the length of the first top post.

4. The transformer according to claim 3.

5. a projected area of ​​the second magnetic core is equal to a projected area of ​​the first pole in a plane perpendicular to the first direction; In the first direction, the length of the second magnetic core is equal to or greater than the length of the first magnetic core.

5. A transformer as claimed in claim 4.

6. A first transition surface is provided between the first apex pillar and each of the first side pillars, and the first transition surface is an inclined surface or a circular arc surface.

4. The transformer according to claim 3.

7. The first magnetic core has a rectangular parallelepiped shape, the second magnetic core includes a second apex pillar and second side pillars perpendicularly connected to both opposing ends of the second apex pillar, and an end of the second side pillar away from the second apex pillar is connected to the first magnetic core.

3. The transformer according to claim 2 .

8. In the second direction, the length of the first magnetic core is equal to or less than the length of the second apex pillar.

8. A transformer as claimed in claim 7.

9. a projected area of ​​the first magnetic core is equal to a projected area of ​​the second apex pillar in a plane perpendicular to the first direction; In the first direction, a length of the first magnetic core is equal to or greater than a length of the second magnetic core.

9. A transformer as claimed in claim 8.

10. A second transition surface is provided between the second apex pillar and each of the second side pillars, and the second transition surface is an inclined surface or a circular arc surface.

8. A transformer as claimed in claim 7.

11. the first magnetic core includes a first apex pillar and a first side pillar perpendicularly connected to both opposing ends of the first apex pillar, the second magnetic core includes a second apex pillar and a second side pillar perpendicularly connected to both opposing ends of the second apex pillar, and an end of the first side pillar remote from the first apex pillar is connected to an end of the corresponding second side pillar remote from the second apex pillar.

3. The transformer according to claim 2 .

12. a first transition surface is provided between the first apex pillar and each of the first side pillars, the first transition surface being an inclined surface or an arc surface; A second transition surface is provided between the second apex pillar and each of the second side pillars, and the second transition surface is an inclined surface or a circular arc surface. Transformer according to claim 11.

13. In the second direction, a length of the bottom wall is smaller than a length of each of the two side walls, and a stop wall is provided at both ends of each of the two side walls, the stop wall is provided toward the winding, and a notch through which the winding passes is formed between two adjacent stop walls in the first direction.

2. The transformer according to claim 1 .

14. An abutment plate is provided at an end of the retaining plate away from the bottom wall to connect the retaining wall. Transformer according to claim 13.

15. a limiting plate is further connected to an end of the abutment plate that is away from a corresponding one of the two side walls in the first direction, and the winding is located between the two limiting plates that face each other in the first direction; The surface of the limiting plate that faces away from the bottom wall forms an inclined surface or an arcuate surface.

15. A transformer as claimed in claim 14.

16. a partition plate is provided at a center portion of the retaining plate in the first direction, the winding includes a first winding and a second winding, and the first winding and the second winding are located on both sides of the partition plate, respectively.

2. The transformer according to claim 1 .

17. At least one pin is further provided on a side of the side wall away from the winding, the pin being located at an end of the side wall farther from the second magnetic core in the third direction.

4. The transformer according to claim 3.

18. A clearance groove is provided on each of the two side walls, and the clearance groove is for increasing a creepage distance between the pin and the first magnetic core and / or the second magnetic core.

18. A transformer as claimed in claim 17.

19. each of the two side walls includes a first surface and a third surface provided opposite to each other along the second direction, and a second surface and a fourth surface provided opposite to each other along the third direction; the clearance groove includes a first groove segment provided on the first surface, a second groove segment provided on the second surface, a third groove segment provided on the third surface, and a fourth groove segment provided on the fourth surface, and the first groove segment, the second groove segment, the third groove segment, and the fourth groove segment are in communication with each other; 20. The transformer of claim 18.

20. In a plane perpendicular to the third direction, a projected area of ​​the second magnetic core is equal to or larger than a projected area of ​​the first magnetic core.

9. A transformer as claimed in claim 8.

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