High-frequency transformer

Abstract

The invention discloses a high-frequency transformer, and relates to the technical field of electronic devices, the high-frequency transformer comprises a first magnetic core, a second magnetic core and a skeleton, a plurality of first side legs of the first magnetic core are fixedly connected with a first base, and a plurality of first grooves are formed in the outer side wall of the first base; a plurality of second side legs of the second magnetic core are fixedly connected with the second base, and each second side leg is fixedly connected with the corresponding first side leg; the framework comprises a winding shaft and a plurality of first limiting plates, the first limiting plates are fixedly connected to the same end of the winding shaft, the first base and the second base can press the winding shaft, and each first limiting plate is arranged in one first groove; the first grooves can limit the rotation of the corresponding first limiting plates around the axis of the winding shaft and the movement of the corresponding first limiting plates in the direction close to the winding shaft, and the multiple first grooves can limit the relative movement of the framework and the first magnetic core in the direction perpendicular to the axis of the winding shaft by limiting the corresponding first limiting plates. The assembling efficiency can be improved, and the stability of the structure is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of electronic devices, and in particular to a high-frequency transformer. Background Art

[0002] The use of high-power density transformers is an important way to achieve the miniaturization and flattening of magnetic devices. The high power density characteristics of magnetic devices mean that they can handle larger powers in a smaller volume. Magnetic devices are important components of products such as power converters and inverters, and can achieve functions such as voltage and current conversion, energy storage, and filtering. The miniaturization of magnetic devices will lead to the miniaturization of power products, which has significant advantages in improving system efficiency and reducing material costs. High-power density magnetic devices can achieve the same or higher performance in a smaller space, which helps to reduce the weight and volume of the final product, especially in the fields of new energy vehicles and information communications; and can meet consumers' demand for high portability and high energy efficiency products. Therefore, the study of high-power density transformers is particularly important for promoting the high power density and miniaturization of power products.

[0003] The magnetic core of high-frequency transformers is mainly made of ferrite materials. Currently, the development of ferrite materials has reached a bottleneck period. Improving high-frequency transformers only from the material itself can only achieve limited results in reducing core losses and increasing transformer power density.

[0004] Most of the existing high-frequency transformers are EE-type transformers, which have two E-type cores, each of which has two legs. The legs of the two E-type cores are interconnected to form a mounting cavity, in which a frame with a winding coil is set. The frame and the E-type core are fixed by adhesive tape, but the fixing effect is poor and an additional process is required for winding the tape, which is inconvenient for assembly and has low assembly efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a high-frequency transformer to solve the problems existing in the above-mentioned prior art, simplify the assembly process, help improve the assembly efficiency, and ensure the stability of the structure.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a high-frequency transformer, comprising a first magnetic core, a second magnetic core and a skeleton, wherein:

[0008] The first magnetic core includes a first base and a plurality of first side legs, one end of each of the first side legs is fixedly connected to the first base, and a plurality of first grooves are arranged on the outer side wall of the first base;

[0009] The second magnetic core comprises a second base and a plurality of second side legs, one end of each of the second side legs is fixedly connected to the second base, the second side legs correspond to the first side legs one by one, and one end of each of the second side legs away from the second base is fixedly connected to one end of the corresponding first side leg away from the first base;

[0010] The skeleton includes a winding shaft and a plurality of first limit plates, wherein the plurality of first limit plates are fixedly connected to the same end of the winding shaft, and the winding shaft is arranged between the first base and the second base, and the first base and the second base can press the winding shaft, and each first limit plate is arranged in a first groove, and each first groove can limit the rotation of the corresponding first limit plate around the axis of the winding shaft and the movement toward the direction close to the winding shaft. The plurality of first grooves can limit the relative movement of the skeleton and the first magnetic core in a direction perpendicular to the axis of the winding shaft by limiting the corresponding first limit plates.

[0011] Preferably, the cross-sections of the first base and the second base are both square, and there are four first side legs and four second side legs, the four first side legs are respectively arranged at the four corners of the first base on a side close to the second base, and the four second side legs are respectively arranged at the four corners of the second base on a side close to the first base; the frame is cylindrical, and the frame is arranged at the center of the first base, and the frame is arranged at the center of the second base.

[0012] Preferably, a plurality of second grooves are provided on the outer wall of the second base; the skeleton also includes at least two second limit plates, and the plurality of second limit plates are fixedly connected to one end of the winding shaft away from the first limit plate, and each second limit plate is arranged in a second groove, and each second groove can limit the rotation of the corresponding second limit plate around the axis of the winding shaft and the movement toward the direction close to the winding shaft.

[0013] Preferably, each of the first limiting plates is embedded in the corresponding first groove, and each of the second limiting plates is embedded in the corresponding second groove.

[0014] Preferably, the first magnetic core also includes a first center column, the second magnetic core also includes a second center column, the skeleton has a through hole arranged along the axial direction of the skeleton, one end of the first center column is fixedly connected to the first base, one end of the second center column is fixedly connected to the second base, the other end of the first center column and the other end of the second center column can respectively extend into the through hole from both ends of the through hole, and the other end of the first center column and the other end of the second center column are in contact with each other.

[0015] Preferably, it also includes at least one winding coil and at least two metal pins, each of the winding coils is wound outside the winding shaft; each of the second limiting plates is fixedly connected to at least one of the metal pins, and the two free ends of each of the winding coils are respectively connected to the two metal pins.

[0016] Preferably, a wire groove is provided on the outer side wall of each second limiting plate away from the axis of the winding shaft, and the two free ends of each winding coil respectively pass through the two wire grooves on the two second limiting plates and are respectively connected to the two metal pins on the corresponding two second limiting plates.

[0017] Preferably, each of the metal pins is embedded in the corresponding second groove.

[0018] Preferably, there are four of each of the first side legs, the second side legs and the first limiting plates, one of the first grooves is arranged between two adjacent first side legs, and the four first limiting plates are arranged opposite to each other in pairs.

[0019] Preferably, there are two or four second limit plates, two of which form a limit assembly, the two second limit plates of each limit assembly are arranged opposite to each other, and the two free ends of each winding coil respectively pass through the wire grooves on the two oppositely arranged second limit plates and are respectively connected to the metal pins on the corresponding two second limit plates.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The present invention provides a high-frequency transformer, wherein a first magnetic core comprises a first base and a plurality of first side legs, and a plurality of first grooves are arranged on the outer side wall of the first base; a second magnetic core comprises a second base and a plurality of second side legs, and an end of each second side leg away from the second base is fixedly connected to an end of the corresponding first side leg away from the first base; a skeleton comprises a winding shaft and a plurality of first limiting plates, and the plurality of first limiting plates are all fixedly connected to the same end of the winding shaft, and the first base and the second base can press the winding shaft, and each first limiting plate is arranged in a first groove, and each first groove can limit the rotation of the corresponding first limiting plate around the axis of the winding shaft and the movement in the direction close to the winding shaft, and the plurality of first grooves can limit the relative movement of the skeleton and the first magnetic core in a direction perpendicular to the axis of the winding shaft by limiting the corresponding first limiting plates.

[0022] The present invention realizes the limitation of the skeleton through the first magnetic core and the second magnetic core, thereby realizing the assembly of the first magnetic core, the second magnetic core and the skeleton, specifically: the first limiting plate is placed in the first groove, the second limiting plate is placed in the second groove, and then the first side leg is docked and fixed with the corresponding second side leg, so that the skeleton can be pressed between the first base and the second base, the first base and the second base can axially limit the skeleton, the first limiting plate cooperates with the first groove to realize the radial limitation of the skeleton, and can limit the rotation of the skeleton around the axis of the winding shaft, so that the skeleton can be stably fixed on the first magnetic core and the second magnetic core. The present invention only needs to fix the first side leg with the corresponding side leg to realize the fixation of the first magnetic core, the second magnetic core and the skeleton, which simplifies the assembly process, is conducive to improving the assembly efficiency, and can ensure the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a high-frequency transformer provided by the present invention;

[0025] Figure 2 An exploded diagram of the high-frequency transformer provided by the present invention;

[0026] Figure 3 A schematic structural diagram of a first magnetic core provided by the present invention;

[0027] Figure 4 A front view of a first magnetic core provided by the present invention;

[0028] Figure 5 A top view of a first magnetic core provided by the present invention;

[0029] Figure 6 A right side view of the first magnetic core provided by the present invention;

[0030] Figure 7 A schematic structural diagram of a skeleton with four second limiting plates provided by the present invention;

[0031] Figure 8 A schematic structural diagram of a skeleton with two second limiting plates provided by the present invention;

[0032] In the figure: 100, high frequency transformer; 1, first magnetic core; 101, first base; 102, first side leg; 103, first groove; 104, first center column;

[0033] 2. second magnetic core; 201. second base; 202. second side leg; 203. second groove; 204. second center column;

[0034] 3. Frame; 301. Winding shaft; 302. First limiting plate; 303. Second limiting plate; 304. Through hole; 305. Wire slot; 306. First baffle; 307. Second baffle; 308. Baffle; 309. Outer plate;

[0035] 4. Winding coil; 5. Metal pin; 6. Magnetic core window. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide a high-frequency transformer to solve the problems existing in the above-mentioned prior art, simplify the assembly process, help improve the assembly efficiency, and ensure the stability of the structure.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1 to 8 As shown, the present invention provides a high-frequency transformer 100, comprising a first magnetic core 1, a second magnetic core 2 and a skeleton 3, wherein:

[0040] The first magnetic core 1 comprises a first base 101 and a plurality of first side legs 102, one end of each first side leg 102 is fixedly connected to the first base 101, and a plurality of first grooves 103 are arranged on the outer side wall of the first base 101;

[0041] The second magnetic core 2 includes a second base 201 and a plurality of second side legs 202, one end of each second side leg 202 is fixedly connected to the second base 201, the second side legs 202 correspond to the first side legs 102 one by one, and one end of each second side leg 202 away from the second base 201 is fixedly connected to one end of the corresponding first side leg 102 away from the first base 101;

[0042] The skeleton 3 includes a winding shaft 301 and a plurality of first limiting plates 302, wherein the plurality of first limiting plates 302 are fixedly connected to the same end of the winding shaft 301, and the winding shaft 301 is arranged between the first base 101 and the second base 201, and the first base 101 and the second base 201 can press the winding shaft 301, and each first limiting plate 302 is arranged in a first groove 103, and each first groove 103 can limit the rotation of the corresponding first limiting plate 302 around the axis of the winding shaft 301 and the movement toward the direction close to the winding shaft 301. The plurality of first grooves 103 can limit the relative movement of the skeleton 3 and the first magnetic core 1 in a direction perpendicular to the axis of the winding shaft 301 by limiting the corresponding first limiting plates 302.

[0043] The present invention realizes the limitation of the skeleton 3 through the first magnetic core 1 and the second magnetic core 2, thereby realizing the assembly of the first magnetic core 1, the second magnetic core 2 and the skeleton 3, specifically: the first limiting plate 302 is placed in the first groove 103, the second limiting plate 303 is placed in the second groove 203, and the first side leg 102 is docked and fixed with the corresponding second side leg 202, so that the skeleton 3 can be pressed between the first base 101 and the second base 201, the first base 101 and the second base 201 can axially limit the skeleton 3, the first limiting plate 302 cooperates with the first groove 103 to realize the radial limitation of the skeleton 3, and can limit the rotation of the skeleton 3 around the axis of the winding shaft 301, so that the skeleton 3 can be stably fixed on the first magnetic core 1 and the second magnetic core 2. The present invention only needs to fix the first side leg 102 with the corresponding side leg to realize the fixing of the first magnetic core 1, the second magnetic core 2 and the skeleton 3, which simplifies the assembly process, is conducive to improving the assembly efficiency, and can ensure the stability of the structure.

[0044] In the present invention, the cross-sections of the first base 101 and the second base 201 are both square, and there are four first legs 102 and four second legs 202. The four first legs 102 are respectively arranged at the four corners of the side of the first base 101 close to the second base 201, and the four second legs 202 are respectively arranged at the four corners of the side of the second base 201 close to the first base 101; the frame 3 is cylindrical, and the frame 3 is arranged at the center of the first base 101, and the frame 3 is arranged at the center of the second base 201. Compared with the magnetic core base with a rectangular cross-section, the utilization rate of the magnetic core window 6 can be improved, and the power density of the high-frequency transformer 100 can be improved. For the rectangular magnetic core base, the width direction dimension of the rectangular magnetic core base needs to meet the arrangement requirements of the frame 3 and the winding coil 4, and the length direction dimension of the rectangular magnetic core base cannot be fully utilized. For the frame 3 and the winding coil 4 of the same size, the overall size is larger and the power density is lower.

[0045] It should be noted that the cross sections of the first base 101 and the second base 201 are cross sections perpendicular to the axis of the frame 3. The space between the first base 101 and the four first legs 102 and the space between the second base 201 and the four second legs 202 are the core windows 6.

[0046] In the present invention, a plurality of second grooves 203 are arranged on the outer wall of the second base 201; the frame 3 further comprises at least two second limiting plates 303, and the plurality of second limiting plates 303 are all fixedly connected to the end of the winding shaft 301 away from the first limiting plate 302, and each second limiting plate 303 is arranged in a second groove 203, and each second groove 203 can limit the corresponding second limiting plate 303 from rotating around the axis of the winding shaft 301 and moving toward the direction close to the winding shaft 301. The second groove 203 and the second limiting plate 303 can further limit the end of the frame 3 away from the first limiting plate 302, and further improve the stability of the assembly.

[0047] In the present invention, each first limiting plate 302 is embedded in the corresponding first groove 103, and each second limiting plate 303 is embedded in the corresponding second groove 203, that is, the first limiting plate 302 and the second limiting plate 303 do not protrude outside the first groove 103 and the second groove 203, and the first magnetic core 1 and the second magnetic core 2 are fully utilized in the cross-sectional direction of the first magnetic core 1 and the second magnetic core 2, which is beneficial to reducing the volume of the high-frequency transformer 100, making the structure more compact, and improving the power density of the transformer.

[0048] In the present invention, the first magnetic core 1 also includes a first center column 104, the second magnetic core 2 also includes a second center column 204, the skeleton 3 has a through hole 304 arranged along the axial direction of the skeleton 3, one end of the first center column 104 is fixedly connected to the first base 101, one end of the second center column 204 is fixedly connected to the second base 201, the other end of the first center column 104 and the other end of the second center column 204 can respectively extend into the through hole 304 from both ends of the through hole 304, and the other end of the first center column 104 and the other end of the second center column 204 contact each other, thereby forming a magnetic flux circuit.

[0049] The present invention further includes at least one winding coil 4 and at least two metal pins 5, each winding coil 4 is wound outside the winding shaft 301; each second limiting plate 303 is fixedly connected to at least one metal pin 5, and the two free ends (inlet end and outlet end) of each winding coil 4 are respectively connected to the two metal pins 5. The second limiting plate 303 can be used for limiting the frame 3 and supporting the metal pins 5, which simplifies the structure of the high-frequency transformer 100.

[0050] In the present invention, a wire groove 305 is provided on the outer side wall of each second limiting plate 303 away from the axis of the winding shaft 301, and the two free ends of each winding coil 4 respectively pass through the two wire grooves 305 on the two second limiting plates 303 and are respectively connected to the two metal pins 5 on the corresponding two second limiting plates 303. As a preferred embodiment, the outer side walls of the two free ends of the winding coil 4 can contact the inner wall of the wire groove 305 and be limited and fixed in the wire groove 305, and the two free ends of the winding coil 4 will not protrude from the frame 3. The wire groove 305 can fix and protect the winding coil 4.

[0051] In the present invention, each metal pin 5 is embedded in the corresponding second groove 203, which is beneficial to improving the power density of the transformer.

[0052] In the present invention, there are four first side legs 102, four second side legs 202 and four first limit plates 302. A first groove 103 is provided between two adjacent first side legs 102, and the four first limit plates 302 are arranged opposite to each other in pairs. There are air gaps between two adjacent first side legs 102 and two adjacent second side legs 202. The high-frequency transformer 100 of the present invention has four air gaps, which greatly improves the heat dissipation effect compared with the two air gaps of the EE type transformer.

[0053] In the present invention, there are two or four second limit plates 303, and the two second limit plates 303 form a limit assembly. The two second limit plates 303 of each limit assembly are arranged opposite to each other, and the two free ends of each winding coil 4 respectively pass through the wire grooves 305 on the two oppositely arranged second limit plates 303 and are respectively connected to the metal pins 5 on the corresponding two second limit plates 303. The two free ends of each winding coil 4 are respectively connected to the metal pins 5 on the oppositely arranged second limit plates 303, so that the distance between the two free ends of each winding coil 4 is large, and a good electromagnetic isolation effect is achieved. When there are fewer winding coils 4, the second limit plates 303 are designed to be two, and the structure is simplified on the basis of meeting the functional requirements. When there are more winding coils 4, the second limit plates 303 are designed to be four, and more metal pins 5 can be set, which is conducive to the winding of multiple windings or high-power wires, and meets the demand for high-power products to increase power.

[0054] The present invention further includes a first baffle 306 and a second baffle 307, which are fixed to both ends of the winding shaft 301, respectively. The cross-sectional dimensions of the first baffle 306 and the second baffle 307 are larger than the cross-sectional dimensions of the winding shaft 301, that is, the projection of the winding shaft 301 on the first baffle 306 is located inside the outer edge of the first baffle 306, and the projection of the winding shaft 301 on the second baffle 307 is located inside the outer edge of the second baffle 307. The first limit plate 302 is fixedly connected to the first baffle 306, and the second limit plate 303 is fixedly connected to the second baffle 307; the inner wall of the first base 101 close to the second base 201 contacts the end face of the first baffle 306 away from the second baffle 307, and the inner wall of the second base 201 close to the first base 101 contacts the end face of the second baffle 307 away from the first baffle 306. The first limiting plate 302 protrudes from the end surface of the first baffle plate 306 away from the second baffle plate 307, thereby ensuring that the first limiting plate 302 can be assembled into the first groove 103, and the second limiting plate 303 protrudes from the end surface of the second baffle plate 307 away from the first baffle plate 306, thereby ensuring that the second limiting plate 303 can be assembled into the second groove 203.

[0055] In the present invention, the first side leg 102 is bonded to the corresponding second side leg 202 to achieve fixation. As a preferred embodiment, the first side leg 102 is bonded to the corresponding second side leg 202 by epoxy resin adhesive.

[0056] In the present invention, the first base 101 and the second base 201 are both square in cross section before the first groove 103 and the second groove 203 are provided. Each first leg 102 and each second leg 202 are of the same shape. Four first legs 102 are arranged around the first base 101 and are symmetrical about the center of the first center column 104; four second legs 202 are arranged around the second base 201 and are symmetrical about the center of the second center column 204. The four first grooves 103 are symmetrical about the center of the first center column 104, and the four second grooves 203 are symmetrical about the center of the second center column 204. The first leg 102 and the second leg 202 each include two planes connected in sequence and a circular arc surface. The two planes of the first leg 102 or the second leg 202 are perpendicular to each other, and the circular arc surface is arranged inwardly. The space enclosed by the eight circular arc surfaces and the first base 101 and the second base 201 is the magnetic core window 6. Specifically, the method for obtaining the first magnetic core 1 and the second magnetic core 2 is as follows: obtain a rectangular magnetic core material, the cross-section of the rectangular magnetic core material is a square, and remove the inscribed circle material on a rectangular outer wall of the rectangular magnetic core material, that is, remove the material surrounded by the inscribed circle of the rectangular outer wall as the boundary to form a first base 101 and four first side legs 102 or a second base 201 and four second side legs 202; open a first groove 103 on the four outer walls of the first base 101, and open a second groove 203 on the four outer walls of the second base 201, thereby forming a nearly square first base 101 and a second base 201, and a nearly triangular first side leg 102 and a second side leg 202. The size design principle of the first leg 102 and the second leg 202 is the same. Taking the first leg 102 as an example, the length of the two right-angled sides of the first leg 102 depends on the width of the first groove 103 and the side length of the first base 101, and the length of the arc side of the first leg 102 depends on the size of the core window 6. The sum of the areas of the four first legs 102 is equal to or slightly less than the area of ​​the first center column 104. The first center column 104, the second center column 204 and the winding shaft 301 are all cylindrical. The through hole 304 is a circular through hole 304. The first baffle 306 and the second baffle 307 are nearly circular. Specifically, the outer side walls of the first baffle 306 and the second baffle 307 each include four plane side walls and four arc side walls, and the four plane side walls and the four arc side walls are alternately arranged. The first limiting plate 302 and the second limiting plate 303 are respectively arranged on the plane side walls of the first baffle 306 and the second baffle 307. The lengths of the first groove 103 and the second groove 203 and the diameters of the first center column 104 and the second center column 204 are all equal. The diameter of the inscribed circle is twice the diameter of the first center column 104 .

[0057] In the present invention, the protruding height of the first limit plate 302 is equal to the thickness of the first base 101. The first limit plate 302 is a nearly U-shaped structure, including a bottom plate and two side plates, the bottom plate is fixedly connected to the first baffle 306, the bottom plate is arranged at the outer edge of the first baffle 306, one end of the two side plates is fixedly connected to the side of the bottom plate away from the winding shaft 301, and the other end of the two side plates extends to the side away from the winding shaft 301. The extension length of the side plate is the same or approximately the same as the depth of the first groove 103, and the length of the bottom plate is the same or approximately the same as the length of the first groove 103. The thickness of the first limit plate 302 is generally between 0.5 mm and 2 mm. The outer wall of the first limit plate 302 completely fits the inner wall of the first groove 103.

[0058] In the present invention, the second limiting plate 303 includes a baffle 308 and an extension plate 309. The baffle 308 is fixedly connected to the second baffle 307. The baffle 308 is arranged at the outer edge of the second baffle 307 and extends in a direction away from the first baffle 306. The baffle 308 is perpendicular to the second baffle 307. The extension plate 309 is fixedly connected to the side of the baffle 308 away from the second baffle 307. The extension plate 309 is arranged in a row with metal pins 5 and wire grooves 305. The metal pins 5 extend to the side away from the winding shaft 301. The wire grooves 305 are U-shaped grooves that penetrate the extension plate 309 along the length direction of the metal pins 5. The baffle 308 is in contact with the inner bottom wall of the second groove 203, and the outer side wall of the extension plate 309 is in contact with the inner side wall of the second groove 203, so as to limit the position between the frame 3 and the second magnetic core 2. The length of the metal pin 5 is 8 mm, the extension length of the second baffle 307 is 5 mm, the width of the wire groove 305 is 1 mm-2 mm, and the spacing between the metal pins 5 is 5 mm.

[0059] In the present invention, the winding coil 4 can be made of a variety of transformer wires such as enameled wire, three-layer insulated wire, film-covered wire, and Litz wire. The winding coil 4 is evenly wound on the surface of the winding shaft 301 according to different turn ratios, and the two ends of the winding coil 4 are respectively connected and fixed to the metal pins 5 by soldering. As a preferred embodiment, the primary winding coil 4 is made of enameled wire, and the secondary winding coil 4 is made of three-layer insulated wire to increase the insulation effect.

[0060] In the present invention, the first magnetic core 1 and the second magnetic core 2 are both MnZn ferrite power magnetic cores. The ferrite material has a high magnetic permeability and low loss at high frequencies, meeting the use conditions of the high-frequency transformer 100. At the same time, it is easy to be processed into various complex magnetic core shapes, which facilitates the processing of the magnetic core.

[0061] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A high frequency transformer, characterized in that: It includes a first magnetic core, a second magnetic core and a skeleton, wherein: The first magnetic core includes a first base and a plurality of first side legs, one end of each of the first side legs is fixedly connected to the first base, and a plurality of first grooves are arranged on the outer side wall of the first base; The second magnetic core comprises a second base and a plurality of second side legs, one end of each of the second side legs is fixedly connected to the second base, the second side legs correspond to the first side legs one by one, and one end of each of the second side legs away from the second base is fixedly connected to one end of the corresponding first side leg away from the first base; The skeleton includes a winding shaft and a plurality of first limit plates, wherein the plurality of first limit plates are fixedly connected to the same end of the winding shaft, and the winding shaft is arranged between the first base and the second base, and the first base and the second base can press the winding shaft, and each first limit plate is arranged in a first groove, and each first groove can limit the rotation of the corresponding first limit plate around the axis of the winding shaft and the movement toward the direction close to the winding shaft. The plurality of first grooves can limit the relative movement of the skeleton and the first magnetic core in a direction perpendicular to the axis of the winding shaft by limiting the corresponding first limit plates.

2. The high frequency transformer according to claim 1, characterized in that: The cross-sections of the first base and the second base are both square, and there are four first side legs and four second side legs. The four first side legs are respectively arranged at the four corners of the first base on a side close to the second base, and the four second side legs are respectively arranged at the four corners of the second base on a side close to the first base; the frame is cylindrical, and the frame is arranged at the center of the first base, and the frame is arranged at the center of the second base.

3. The high frequency transformer according to claim 1 or 2, characterized in that: A plurality of second grooves are arranged on the outer wall of the second base; the skeleton also includes at least two second limit plates, and the plurality of second limit plates are fixedly connected to one end of the winding shaft away from the first limit plate, and each second limit plate is arranged in a second groove, and each second groove can limit the rotation of the corresponding second limit plate around the axis of the winding shaft and the movement toward the direction close to the winding shaft.

4. The high frequency transformer according to claim 3, characterized in that: Each of the first limiting plates is embedded in the corresponding first groove, and each of the second limiting plates is embedded in the corresponding second groove.

5. The high frequency transformer according to claim 1, characterized in that: The first magnetic core also includes a first center column, and the second magnetic core also includes a second center column. The skeleton has a through hole arranged along the axial direction of the skeleton. One end of the first center column is fixedly connected to the first base, and one end of the second center column is fixedly connected to the second base. The other end of the first center column and the other end of the second center column can respectively extend into the through hole from both ends of the through hole, and the other end of the first center column and the other end of the second center column are in contact with each other.

6. The high frequency transformer according to claim 4, characterized in that: It also includes at least one winding coil and at least two metal pins, each of the winding coils is wound outside the winding shaft; each of the second limiting plates is fixedly connected to at least one of the metal pins, and the two free ends of each of the winding coils are respectively connected to the two metal pins.

7. The high frequency transformer according to claim 6, characterized in that: A wire groove is provided on the outer side wall of each second limiting plate away from the axis of the winding shaft, and the two free ends of each winding coil respectively pass through the two wire grooves on the two second limiting plates and are respectively connected to the two metal pins on the corresponding two second limiting plates.

8. The high frequency transformer according to claim 7, characterized in that: Each of the metal pins is embedded in the corresponding second groove.

9. The high frequency transformer according to claim 1, characterized in that: There are four first limiting plates, one first groove is arranged between two adjacent first side legs, and the four first limiting plates are arranged opposite to each other in pairs.

10. The high frequency transformer according to claim 7, characterized in that: There are two or four second limiting plates, two of which form a limiting assembly, and the two second limiting plates of each limiting assembly are arranged opposite to each other. The two free ends of each winding coil respectively pass through the wire grooves on the two oppositely arranged second limiting plates and are respectively connected to the metal pins on the corresponding two second limiting plates.

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