Transformer

Abstract

The transformer comprises a winding frame, a first magnetic core, a second magnetic core and a winding, the winding frame comprises two side walls oppositely arranged in the first direction and a bottom wall connected with the two side walls, stopping plates are arranged on the two sides of the bottom wall in the second direction, and the length of the stopping plates in the third direction is smaller than that of the side walls in the third direction; the bottom wall, the two side walls and the two stopping plates jointly define an installation part, at least part of the first magnetic core is located in the installation part, the winding is wound on the outer sides of the first magnetic core, the bottom wall and the two stopping plates, and the second magnetic core covers part of the winding and is connected with the first magnetic core. According to the transformer, the first magnetic core is arranged in the mounting part located in the winding frame, and the winding is wound on the outer side of the first magnetic core, so that an overlapping part exists between the magnetic core and the side wall and between the winding and the side wall in the third direction, the length of the transformer in the third direction is reduced, and the overall size of the transformer is reduced.

Description

Technical Field

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

[0002] The transformer is an important component in electrical equipment. It is used to adjust different voltages so that the voltage reaches the applicable range of the electrical equipment, thereby enabling the electrical equipment to operate.

[0003] Figure 1 This is an exploded view of a transformer in the prior art. Figure 1 , wherein the transformer includes a winding frame 100, a magnetic core 200, a winding 300, an insulating tape 400 and a suction part 500, wherein the winding frame 100 includes a base 101 and a winding part 102 arranged in the middle of the base 101, the winding part 102 is protruding from the base 101, and a wire groove 104 is formed on the outer surface of the winding part 102, and the winding 300 is wound in the wire groove 104. A through hole 103 is also provided in the winding part 102, and the axis of the through hole 103 is perpendicular to the winding 300. At least part of the magnetic core 200 is passed through the through hole 103 along the axis of the through hole 103, and the remaining magnetic core 200 is arranged on the base 101 and surrounds the winding 300.

[0004] However, in the prior art, since the winding portion 102 is protruding from the base 101, the space below the winding portion 102 and between the base 101 cannot be used, so that the overall size of the transformer is large, which is not conducive to the miniaturization of the transformer. Summary of the invention

[0005] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a transformer, which is conducive to reducing the size of the transformer.

[0006] On the one hand, the present application provides a transformer, comprising a winding frame, a first magnetic core, a second magnetic core and a winding, the winding frame comprising two side walls arranged opposite to each other along a first direction and a bottom wall connecting the two side walls, stop plates are arranged on both sides of the bottom wall along the second direction, the length of the stop plate in a third direction is less than the length of the side wall in the third direction, the bottom wall, the two side walls and the two stop plates jointly form a mounting portion, the first magnetic core is at least partially located in the mounting portion, the winding is wound on the outside of the first magnetic core, the bottom wall and the two stop plates, and the second magnetic core cover is arranged outside a portion of the winding and connected to the first magnetic core;

[0007] The first direction, the second direction and the third direction are perpendicular to each other.

[0008] The present application arranges the first magnetic core in an installation portion located inside the winding frame, and winds the winding on the outside of the first magnetic core, so that there is an overlapping portion between the magnetic core, the winding and the side wall in the third direction; that is, the installation of the magnetic core and the winding makes better use of the space inside the winding frame, and reduces the length of the transformer in the third direction compared to the solutions in the related art, which is beneficial to reducing the overall size of the transformer and meets the development needs of miniaturization of transformers.

[0009] In a possible implementation, in the third direction, the bottom wall is connected to the middle of the two side walls, and the bottom wall and the two side walls together form a winding space;

[0010] Wherein, the length of the winding in the third direction is smaller than the length of the side wall in the third direction.

[0011] In a possible implementation, the second magnetic core is in a rectangular shape, the first magnetic core includes a first top column and first side columns vertically connected to opposite ends of the first top column, and one end of the first side column facing away from the first top column is connected to the second magnetic core.

[0012] In a possible implementation manner, in the second direction, the length of the second magnetic core is less than or equal to the length of the first top pillar.

[0013] In a possible implementation manner, in a plane perpendicular to the first direction, a projected area of ​​the second magnetic core is equal to a projected area of ​​the first top pillar.

[0014] In a possible implementation manner, in the first direction, the length of the second magnetic core is greater than or equal to the length of the first magnetic core.

[0015] In a possible implementation, a first transition surface is provided between the first top column and the first side column, and the first transition surface is an inclined surface or an arc surface.

[0016] In a possible implementation, the first magnetic core is in a rectangular shape, the second magnetic core includes a second top column and second side columns vertically connected to opposite ends of the second top column, and one end of the second side column facing away from the second top column is connected to the first magnetic core.

[0017] In a possible implementation manner, in the second direction, the length of the first magnetic core is less than or equal to the length of the second top pillar.

[0018] In a possible implementation manner, in a plane perpendicular to the first direction, a projected area of ​​the first magnetic core is equal to a projected area of ​​the second top pillar.

[0019] In a possible implementation manner, in the first direction, the length of the first magnetic core is greater than or equal to the length of the second magnetic core.

[0020] In a possible implementation, a second transition surface is provided between the second top column and the second side column, and the second transition surface is an inclined surface or an arc surface.

[0021] In one possible implementation, the first magnetic core includes a first top column and a first side column vertically connected to opposite ends of the first top column, the second magnetic core includes a second top column and a second side column vertically connected to opposite ends of the second top column, and an end of the first side column facing away from the first top column is connected to an end of the corresponding second side column facing away from the second top column.

[0022] In a possible implementation, a first transition surface is provided between the first top column and the first side column, and the first transition surface is an inclined surface or an arc surface;

[0023] A second transition surface is provided between the second top column and the second side column, and the second transition surface is an inclined surface or an arc surface.

[0024] In one possible implementation, in the second direction, the length of the bottom wall is smaller than the length of the side wall, and stop walls are provided at both ends of the side wall, and the stop walls are arranged toward the winding; in the first direction, a gap is formed between two adjacent stop walls for the winding to pass through.

[0025] In a possible implementation manner, an abutment plate connected to the stop wall is provided at one end of the stop plate facing away from the bottom wall.

[0026] In a possible implementation, in the first direction, one end of the abutment plate facing away from the side wall is further connected to a limiting plate, and the winding is located between two limiting plates that are opposite to each other in the first direction.

[0027] In a possible implementation, a surface of the limiting plate facing away from the bottom wall is an inclined surface or an arc surface.

[0028] In a possible implementation, in the first direction, a partition plate is provided in the middle of the stop plate, and the winding includes a first winding and a second winding, and the first winding and the second winding are respectively located on both sides of the partition plate.

[0029] In a possible implementation manner, at least one pin is further provided on a side of the side wall away from the winding, and in the third direction, the pin is located at an end of the side wall away from the second magnetic core.

[0030] In a possible implementation manner, a clearance groove is provided on the side wall, and the clearance groove is used to increase the creepage distance between the pin and the first magnetic core and / or the second magnetic core.

[0031] In a possible implementation, the sidewall includes a first surface and a third surface arranged opposite to each other along the second direction and a second surface and a fourth surface arranged opposite to each other along the third direction, the spacing groove includes a first groove segment arranged on the first surface, a second groove segment arranged on the second surface, a third groove segment arranged on the third surface, and a fourth groove segment arranged on the fourth surface, and the first groove segment, the second groove segment, the third groove segment, and the fourth groove segment are connected to each other.

[0032] In a possible implementation manner, in a plane perpendicular to the third direction, a projected area of ​​the second magnetic core is greater than or equal to a projected area of ​​the first magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is an exploded view of a transformer in the prior art;

[0035] Figure 2 A simplified structural diagram of a transformer provided in one embodiment of the present application;

[0036] Figure 3 An exploded view of a transformer provided in one embodiment of the present application;

[0037] Figure 4 An exploded view of a transformer provided in accordance with another embodiment of the present application;

[0038] Figure 5 A simplified structural diagram of a magnetic core provided in one embodiment of the present application;

[0039] Figure 6 A simplified structural diagram of a winding frame provided in one embodiment of the present application;

[0040] Figure 7 A simplified structural diagram of a winding frame provided in another embodiment of the present application.

[0041] Reference numerals:

[0042] 10- Installation part;

[0043] 20-winding space;

[0044] 100-winding rack;

[0045] 101-base; 102-winding part; 103-through hole; 104-wire slot;

[0046] 110 - side wall; 111 - recessed portion; 112 - spacing groove;

[0047] 120-bottom wall;

[0048] 130-stop plate;

[0049] 140-stop wall;

[0050] 150 - abutment plate;

[0051] 160-limiting plate;

[0052] 170-separator;

[0053] 180-pin;

[0054] 200-magnetic core;

[0055] 210 - first magnetic core; 211 - first top column; 212 - first side column; 213 - first transition surface;

[0056] 220 - second magnetic core; 221 - second top column; 222 - second side column; 223 - second transition surface;

[0057] 300-winding;

[0058] 310- first winding;

[0059] 320-second winding;

[0060] 400-Insulation tape;

[0061] 500- suction part;

[0062] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0064] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0065] As described in the background technology, in the transformer of the related art, since the structure of the winding frame includes a base and a winding portion protruding from the base, the winding and the magnetic core are both located above the base. The transformer is high in height and large in overall size, which is not conducive to its miniaturization.

[0066] In view of this, an embodiment of the present application aims to provide a transformer, by forming a mounting portion inside the winding frame, disposing a first magnetic core inside the mounting portion, and winding around the outside of the first magnetic core, so that there is an overlapping portion between the magnetic core and the winding and the side wall in the height direction, thereby reducing the height of the transformer and facilitating reducing the overall size of the transformer.

[0067] The contents of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0068] Figure 2 A simplified structural diagram of a transformer provided in one embodiment of the present application; Figure 3 An exploded view of a transformer provided in one embodiment of the present application; Figure 4 An exploded view of a transformer provided in accordance with another embodiment of the present application; Figure 5 A simplified structural diagram of a magnetic core provided in one embodiment of the present application; Figure 6 A simplified structural diagram of a winding frame provided in one embodiment of the present application; Figure 7 A schematic diagram of the structure 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, wherein the third direction Z may be, for example, a height direction (vertical direction).

[0069] Please refer to Figure 2-Figure 7 This embodiment provides a transformer, including a winding frame 100, a magnetic core 200 and a winding 300.

[0070] The winding frame 100 includes two side walls 110 that are arranged opposite to each other along a first direction X and a bottom wall 120 that connects the two side walls 110, and the bottom wall 120 can be arranged perpendicular to the side walls 110. Along the second direction Y, stop plates 130 are provided on both sides of the bottom wall 120, and the stop plates 130 are arranged perpendicular to both the side walls 110 and the bottom wall 120. Along the first direction X, the stop plate 130 can extend from the side wall 110 on one side to the side wall 110 on the other side, or the stop plate 130 can also be arranged only in a partial area between the two side walls 110. In this embodiment, the stop plate 130 preferably extends from the side wall 110 on one side to the side wall 110 on the other side. The length of the stop plate 130 in the third direction Z is less than the length of the side wall 110 in the third direction Z, so as to form a notch in the second direction Y. In this embodiment, the bottom wall 120, the two side walls 110 and the two stop plates 130 together enclose the mounting portion 10; as Figure 4 and Figure 5 As shown, the mounting portion 10 is equivalent to a groove opened in the winding frame 100, and the groove has notches on both sides of the second direction Y, thereby forming a stop plate 130 whose height is lower than the side wall 110, so as to facilitate the subsequent assembly of the magnetic core 200 and the winding 300.

[0071] The magnetic core 200 includes a first magnetic core 210 and a second magnetic core 220, wherein the first magnetic core 210 is at least partially located in the mounting portion 10. Exemplarily, the volume of the first magnetic core 210 is adapted to the volume of the mounting portion 10, so that the mounting portion 10 can be filled. The winding 300 is wound around the outside of the first magnetic core 210, the bottom wall 120 and the two stopper plates 130 with an axis parallel to the first direction X. The second magnetic core 220 is covered outside a portion of the winding 300 and connected to the first magnetic core 210. Exemplarily, the first magnetic core 210 and the second magnetic core 220 together form a structure having an opening in the second direction Y, and a portion of the winding 300 is passed through the opening.

[0072] In this embodiment, the first magnetic core 210 is arranged in the installation part 10 located inside the winding frame 100, and the winding 300 is wound on the outside of the first magnetic core 210, so that there is an overlapping part between the magnetic core 200 and the winding 300 and the side wall 110 in the third direction Z; that is, the installation of the magnetic core 200 and the winding 300 makes better use of the space inside the winding frame 100, and reduces the length of the transformer in the third direction Z compared with the solution in the related art, which is beneficial to reduce the overall size of the transformer and meets the development demand of miniaturization of the transformer.

[0073] Please continue to refer to Figure 6 and Figure 7In some possible implementations, in the third direction Z, the bottom wall 120 is connected to the middle of the two side walls 110, and the bottom wall 120 and the two side walls 110 together form a winding space 20. The winding 300 is wound on the first magnetic core 210, the bottom wall 120 and the two stopper plates 130 and is located in the winding space 20, so that the length of the winding 300 in the third direction Z is less than the length of the side wall 110 in the third direction Z, that is, the winding 300 will not be exposed from the winding frame 100 in the third direction Z, which is conducive to further reducing the length of the transformer in the third direction Z and reducing the size of the transformer.

[0074] Please refer to Figure 3 In some possible implementations, the second magnetic core 220 of this embodiment is in the shape of a rectangular parallelepiped, and the first magnetic core 210 includes a first top column 211 and first side columns 212 vertically connected to opposite ends of the first top column 211. The first top column 211 and the first side columns 212 located on both sides thereof together form a structure with a substantially "C"-shaped cross section. Among them, the end of the first side column 212 that is away from the first top column 211 is connected to the second magnetic core 220, thereby forming a closed loop.

[0075] In the second direction Y, the length of the second magnetic core 220 is less than or equal to the length of the first top column 211. This arrangement can reduce the probability of misalignment of the first magnetic core 210 and the second magnetic core 220 in the second direction Y during assembly. At the same time, since the top surface of the second magnetic core 220 serves as the top surface of the transformer, it itself can be used as the suction part 500, thereby omitting the suction part 500 in the prior art. In other embodiments of the present case, in a plane perpendicular to the third direction Z, the projected area of ​​the second magnetic core 220 is greater than or equal to the projected area of ​​the first magnetic core 210. As a result, the area of ​​the second magnetic core 220 is larger, which is more conducive to serving as the suction part 500.

[0076] In a plane perpendicular to the first direction X, the projection area of ​​the second magnetic core 220 is equal to the projection area of ​​the first top 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 top pillar 211 are both square. The area of ​​the square is equal to the length of the base multiplied by the height. The lengths of the second magnetic core 220 and the first top pillar 211 in the second direction Y are the lengths of their respective bases, and the lengths in the third direction Z are their respective heights. Since the length of the second magnetic core 220 in the second direction Y is less than or equal to the length of the first top pillar 211 in the second direction Y, and the projection area of ​​the second magnetic core 220 in a plane perpendicular to the first direction X is equal to the projection area of ​​the first top pillar 211 in a plane perpendicular to the first direction X, the length of the second magnetic core 220 in the third direction Z must be greater than or equal to the length of the first top pillar 211 in the third direction Z. That is, the first top pillar 211 in this embodiment has a smaller height, which is conducive to reducing the overall height of the transformer to reduce the size of the transformer. It should be noted that the "equal" in the projection area of ​​the second magnetic core 220 in the plane perpendicular to the first direction X is equal to the projection area of ​​the first top column 211 in the plane perpendicular to the first direction X does not mean absolute same in the mathematical sense. It means that the designs of the two are basically the same, and preferably the difference between the two is within 10%.

[0077] 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 the two first side columns 212 of the first magnetic core 210 can both contact the second magnetic core 220 , thereby reducing the difficulty of assembling the first magnetic core 210 and the second magnetic core 220 .

[0078] In some examples, a first transition surface 213 is further provided between the first top column 211 and the first side column 212 of the present embodiment, and the first transition surface 213 is an inclined surface or an arc surface. The first transition surface 213 is provided to increase the connection thickness between the first top column 211 and the first side column 212, thereby avoiding stress concentration at the connection between the first top column 211 and the first side column 212, and improving the overall strength of the first magnetic core 210. In addition, the probability of the first side column 212 scratching the winding 300 during the assembly process can also be reduced.

[0079] Please refer to Figure 4 In some possible implementations, the first magnetic core 210 of this embodiment is in the shape of a rectangular parallelepiped, and the second magnetic core 220 includes a second top column 221 and second side columns 222 vertically connected to opposite ends of the second top column 221. The second top column 221 and the second side columns 222 located on both sides thereof together form a structure with a substantially "C"-shaped cross section. Among them, the end of the second side column 222 that is away from the second top column 221 is connected to the first magnetic core 210, thereby forming a closed loop.

[0080] In the second direction Y, the length of the first magnetic core 210 is less than or equal to the length of the second top pillar 221 , so that the possibility of misalignment between the first magnetic core 210 and the second magnetic core 220 in the second direction Y during assembly can be reduced.

[0081] In a plane perpendicular to the first direction X, the projection area of ​​the first magnetic core 210 is equal to the projection area of ​​the second top 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 top pillar 221 are both square. The area of ​​the square is equal to the length of the base multiplied by the height. The lengths of the first magnetic core 210 and the second top pillar 221 in the second direction Y are the lengths of their respective bases, and the lengths in the third direction Z are their respective heights. Since the length of the first magnetic core 210 in the second direction Y is less than or equal to the length of the second top pillar 221 in the second direction Y, and the projection area of ​​the first magnetic core 210 in a plane perpendicular to the first direction X is equal to the projection area of ​​the second top pillar 221 in a plane perpendicular to the first direction X, the length of the first magnetic core 210 in the third direction Z must be greater than or equal to the length of the second top pillar 221 in the third direction Z. That is, the second top pillar 221 in this embodiment has a smaller height, which is conducive to reducing the overall height of the transformer to reduce the size of the transformer. It should be noted that the "equal" in the projection area of ​​the first magnetic core 210 in the plane perpendicular to the first direction X is equal to the projection area of ​​the second top column 221 in the plane perpendicular to the first direction X does not mean absolute same in the mathematical sense. It means that the designs of the two are basically the same, and preferably the difference between the two is within 10%.

[0082] 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 second side columns 222 of the second magnetic core 220 can contact the first magnetic core 210 , thereby reducing the difficulty of assembling the first magnetic core 210 and the second magnetic core 220 .

[0083] In some examples, a second transition surface 223 is provided between the second top column 221 and the second side column 222 of the present embodiment, and the second transition surface 223 may be an inclined surface or an arc surface. The second transition surface 223 is provided to increase the connection thickness between the second top column 221 and the second side column 222, thereby avoiding stress concentration at the connection between the second top column 221 and the second side column 222, and improving the overall strength of the second magnetic core 220. In addition, the probability of the second side column 222 scratching the winding 300 during the assembly process can also be reduced.

[0084] Please refer to Figure 5In some possible implementations, the first magnetic core 210 of this embodiment includes a first top column 211 and first side columns 212 vertically connected to opposite ends of the first top column 211, and the first top column 211 and the first side columns 212 located on both sides thereof together form a structure with a substantially "C"-shaped cross section. The second magnetic core 220 includes a second top column 221 and second side columns 222 vertically connected to opposite ends of the second top column 221, and the second top column 221 and the second side columns 222 located on both sides thereof together form a structure with a substantially "C"-shaped cross section. In other words, the first magnetic core 210 and the second magnetic core 220 of this embodiment both adopt a structure with a "C"-shaped cross section. One end of the first side column 212 facing away from the first top column 211 is connected to one end of the corresponding second side column 222 facing away from the second top column 221, thereby forming a closed loop.

[0085] Furthermore, a first transition surface 213 is provided between the first top column 211 and the first side column 212, and the first transition surface 213 is an inclined surface or an arc surface. The first transition surface 213 is provided to increase the connection thickness between the first top column 211 and the first side column 212, thereby avoiding stress concentration at the connection between the first top column 211 and the first side column 212, and improving the overall strength of the first magnetic core 210. In addition, the probability of the first side column 212 scratching the winding 300 during the assembly process can also be reduced.

[0086] A second transition surface 223 is provided between the second top column 221 and the second side column 222. The second transition surface 223 may be an inclined surface or an arc surface. The second transition surface 223 is provided to increase the connection thickness between the second top column 221 and the second side column 222, thereby avoiding stress concentration at the connection between the second top column 221 and the second side column 222, and improving the overall strength of the second magnetic core 220. In addition, the probability of the second side column 222 scratching the winding 300 during the assembly process can also be reduced.

[0087] Please refer to Figure 2 , Figure 6 and Figure 7 In some possible implementations, in order to better realize the installation of the winding 300, in the second direction Y, the length of the bottom wall 120 is less than the length of the side wall 110, and stop walls 140 are further provided at both ends of the side wall 110, and the stop walls 140 are perpendicular to the second direction Y and are arranged toward the winding 300. In the first direction X, a gap is formed between two adjacent stop walls 140 for the winding 300 to pass through, so that the winding 300 can be located in the two gaps 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 less than the length of the side wall 110 in the second direction Y, that is, the winding 300 will not be exposed from the winding frame 100 in the second direction Y, which is conducive to further reducing the length of the transformer in the second direction Y and reducing the size of the transformer.

[0088] Furthermore, in order to realize the assembly of the first magnetic core 210 and the second magnetic core 220, an abutment plate 150 connected to the stop wall 140 is provided at one end of the stop plate 130 of this embodiment away from the bottom wall 120. Figure 6 and Figure 7 It can be understood that the abutment plate 150 is parallel to the bottom wall 120 and is located at the four corners above the bottom wall 120. The abutment plate 150 is vertically connected to the side wall 110, the stop wall 140 and the stop plate 130. During assembly, glue can be dispensed on the surface of the abutment plate 150 to facilitate the assembly of the magnetic core 200.

[0089] Please continue to refer to Figure 6 and Figure 7 In some possible implementations, a side of the side wall 110 facing the winding 300 is further provided with a recessed portion 111, and the bottom wall 120 is connected to the position of the side wall 110 where the recessed portion 111 is provided. Optionally, the bottom wall 120 and the side wall 110 may be integrally formed, for example, integrally formed by an injection molding process.

[0090] Please continue to refer to Figure 6 and Figure 7 In some possible implementations, in the first direction X, one end of the abutting plate 150 away from the side wall 110 is further connected to a limiting plate 160, the limiting plate 160 is arranged perpendicular to the first direction X, and in the second direction Y, both ends of the limiting plate 160 are respectively connected to the stop plate 130 and the stop wall 140. The winding 300 is located between two limiting plates 160 opposite to each other in the first direction X, and the limiting plate 160 can prevent the winding 300 from contacting the second side column 222, thereby ensuring the safety of the transformer.

[0091] In some examples, the surface of the limiting plate 160 facing away from the bottom wall 120 is an inclined surface or an arc surface, and the surface can be inclined from the side of the stop wall 140 to the side of the bottom wall 120. With the above structure, the probability of the limiting plate 160 scratching the winding 300 can be reduced.

[0092] Please refer to Figure 2 , Figure 6 and Figure 7In some possible implementations, the side wall 110 of this embodiment is further provided with at least one pin 180 on the side away from the winding 300 in the first direction X. The winding 300 includes a first winding 310 and a second winding 320, wherein the first winding 310 may be, for example, a high-voltage side winding, and the second winding 320 may be, for example, a low-voltage side winding. The first winding 310 is provided with at least one lead to connect the pin 180 on one side of the side wall 110, and the second winding 320 is provided with at least one lead to connect the pin 180 on the other side of the side wall 110. In this embodiment, a plurality of pins 180 are provided on the side wall 110, and the plurality of pins 180 are arranged in two rows in the third direction Z, and each row includes a plurality of pins 180. In the third direction Z, the pins 180 are located at one end of the side wall 110 away from the second magnetic core 220, so that the pins 180 have a larger safety distance, thereby ensuring the safety of the transformer when in use.

[0093] In some possible implementations, when using Figure 6 In the winding frame 100 shown in the figure, the first winding 310 and the second winding 320 of this embodiment are arranged at intervals along the first direction X. In order to ensure insulation, insulating tape 400 can be wrapped around the outer sides of the first winding 310 and the second winding 320.

[0094] like Figure 7 As shown, in some possible implementations, in the first direction X, a partition plate 170 is provided in the middle of the stop plate 130, using Figure 5 In the winding frame 100 shown, the first winding 310 and the second winding 320 can be respectively located on both sides of the partition plate 170, and the outer sides of the first winding 310 and the second winding 320 are still wrapped with the insulating tape 400, so as to further improve the insulation performance between the first winding 310 and the second winding 320.

[0095] Please continue to refer to Figure 6 and Figure 7 In some possible implementations, a clearance groove 112 is provided on the side wall 110 , and the clearance groove 112 is used to increase the creepage distance between the pin 180 and the first magnetic core 210 and / or the second magnetic core 220 .

[0096] Exemplarily, the spacing groove 112 of the present embodiment surrounds the side wall 110 with an axis parallel to the first direction X. The side wall 110 includes a first surface and a third surface arranged oppositely along the second direction Y and a second surface and a fourth surface arranged oppositely along the third direction Z, and the spacing groove 112 includes a first groove segment arranged on the first surface, a second groove segment arranged on the second surface, a third groove segment arranged on the third surface, and a fourth groove segment arranged on the fourth surface, wherein the first groove segment, the second groove segment, the third groove segment, and the fourth groove segment are connected to each other.

[0097] Through the above-mentioned arrangement, the pin 180 of the present embodiment must pass through the spacing groove 112 when reaching the first magnetic core 210 or the second magnetic core 220. Compared with the solution without the spacing groove 112, it is equivalent to increasing the distance between the side walls of the two spacing grooves 112 perpendicular to the first direction X, thereby increasing the creepage distance from the pin 180 to the first magnetic core 210 or the second magnetic core 220, further ensuring the safety of the transformer during use.

[0098] In summary, the transformer of this embodiment arranges the first magnetic core 210 in the mounting portion 10 located inside the winding frame 100, and winds the winding 300 on 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 the side wall 110 in the third direction Z; that is, the installation of the magnetic core 200 and the winding 300 makes better use of the space inside the winding frame 100, and reduces the length of the transformer in the third direction Z compared to the solutions in the related art, which is beneficial to reducing the overall size of the transformer and meets the development needs of miniaturization of transformers.

[0099] Therefore, Figure 1 The prior art and Figure 3 Taking the embodiment of the present application as an example, compared 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, so that the assembly method of the magnetic core 200 is changed from left-right assembly to top-bottom assembly, and the winding 300 is changed from being indirectly wound on the magnetic core 200 through the wire groove 104 in the prior art to being directly wound on the magnetic core 200 in the present application, thereby changing the assembly method and sequence between the magnetic core 200 and between the magnetic core 200 and the winding 300. In addition, the present application erects the two ends of the base 101 in the prior art to form the side wall 110, thereby solving the problem of insufficient safety distance from the magnetic core 200 to the pin 180 after the structural change.

[0100] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0101] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0102] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0103] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0104] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A transformer, characterized in that: The invention comprises a winding frame, a first magnetic core, a second magnetic core and a winding, wherein the winding frame comprises two side walls arranged opposite to each other along a first direction and a bottom wall connecting the two side walls, and stop plates are arranged on both sides of the bottom wall along the second direction, and the length of the stop plates in a third direction is less than the length of the side walls in the third direction, and the bottom wall, the two side walls and the two stop plates jointly form a mounting portion, the first magnetic core is at least partially located in the mounting portion, the winding is wound on the outside of the first magnetic core, the bottom wall and the two stop plates, and the second magnetic core cover is arranged outside a part of the winding and connected to the first magnetic core; The first direction, the second direction and the third direction are perpendicular to each other.

2. The transformer according to claim 1, characterized in that: In the third direction, the bottom wall is connected to the middle of the two side walls, and the bottom wall and the two side walls together form a winding space; Wherein, the length of the winding in the third direction is smaller than the length of the side wall in the third direction.

3. The transformer according to claim 2, characterized in that: The second magnetic core is in a rectangular parallelepiped shape, the first magnetic core includes a first top column and first side columns vertically connected to opposite ends of the first top column, and one end of the first side column away from the first top column is connected to the second magnetic core.

4. The transformer according to claim 3, characterized in that: In the second direction, the length of the second magnetic core is less than or equal to the length of the first top pillar.

5. The transformer according to claim 4, characterized in that: In a plane perpendicular to the first direction, a projection area of ​​the second magnetic core is equal to a projection area of ​​the first top pillar.

6. The transformer according to claim 5, characterized in that: In the first direction, the length of the second magnetic core is greater than or equal to the length of the first magnetic core.

7. The transformer according to claim 3, characterized in that: A first transition surface is provided between the first top column and the first side column, and the first transition surface is an inclined surface or an arc surface.

8. The transformer according to claim 2, characterized in that: The first magnetic core is in a rectangular parallelepiped shape, and the second magnetic core includes a second top column and second side columns vertically connected to opposite ends of the second top column, and one end of the second side column away from the second top column is connected to the first magnetic core.

9. The transformer according to claim 8, characterized in that: In the second direction, the length of the first magnetic core is less than or equal to the length of the second top pillar.

10. The transformer according to claim 9, characterized in that: In a plane perpendicular to the first direction, a projected area of ​​the first magnetic core is equal to a projected area of ​​the second top pillar.

11. The transformer according to claim 10, characterized in that: In the first direction, the length of the first magnetic core is greater than or equal to the length of the second magnetic core.

12. The transformer according to claim 8, characterized in that: A second transition surface is provided between the second top column and the second side column, and the second transition surface is an inclined surface or an arc surface.

13. The transformer according to claim 2, characterized in that: The first magnetic core includes a first top column and a first side column vertically connected to the opposite ends of the first top column, the second magnetic core includes a second top column and a second side column vertically connected to the opposite ends of the second top column, and the end of the first side column facing away from the first top column is connected to the corresponding end of the second side column facing away from the second top column.

14. The transformer according to claim 13, characterized in that: A first transition surface is provided between the first top column and the first side column, and the first transition surface is an inclined surface or an arc surface; A second transition surface is provided between the second top column and the second side column, and the second transition surface is an inclined surface or an arc surface.

15. The transformer according to claim 1, characterized in that In the second direction, the length of the bottom wall is smaller than that of the side wall, and stop walls are provided at both ends of the side wall, and the stop walls are arranged toward the winding; in the first direction, a gap is formed between two adjacent stop walls for the winding to pass through.

16. The transformer according to claim 15, characterized in that An abutment plate connected to the stop wall is provided at one end of the stop plate away from the bottom wall.

17. The transformer according to claim 16, characterized in that In the first direction, one end of the abutting plate facing away from the side wall is further connected to a limiting plate, and the winding is located between two limiting plates opposite to each other in the first direction.

18. The transformer according to claim 17, characterized in that The surface of the limiting plate facing away from the bottom wall is an inclined surface or an arc surface.

19. The transformer according to claim 1, characterized in that In the first direction, a partition plate is provided in the middle of the stop plate, and the winding includes a first winding and a second winding, and the first winding and the second winding are respectively located on both sides of the partition plate.

20. The transformer according to claim 3, 8 or 13, characterized in that: At least one pin is further provided on a side of the side wall away from the winding. In the third direction, the pin is located at an end of the side wall away from the second magnetic core.

21. The transformer according to claim 20, characterized in that The side wall is provided with a spacing groove, and the spacing groove is used to increase the creepage distance between the pin and the first magnetic core and / or the second magnetic core.

22. The transformer according to claim 21, characterized in that The side wall includes a first surface and a third surface arranged opposite to each other along the second direction and a second surface and a fourth surface arranged opposite to each other along the third direction, the Anshi groove includes a first groove segment arranged on the first surface, a second groove segment arranged on the second surface, a third groove segment arranged on the third surface, and a fourth groove segment arranged on the fourth surface, and the first groove segment, the second groove segment, the third groove segment, and the fourth groove segment are connected to each other.

23. The transformer according to claim 9, characterized in that In a plane perpendicular to the third direction, a projected area of ​​the second magnetic core is greater than or equal to a projected area of ​​the first magnetic core.

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